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node_modules/
dist/
release/*.zip
release/*.zip.sha256
coverage/
playwright-report/
test-results/
*.tsbuildinfo
.DS_Store
.npmrc
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@add-ideas:registry=https://git.add-ideas.de/api/packages/lotobo/npm/
CHANGELOG.md
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# Changelog
## 0.1.0 - 2026-09-01
- Add property-aware conversion graphs for data, image, audio/video, and
subtitle formats
- Add deterministic route enumeration and conservative preservation scoring
- Add bounded JSON, NDJSON, CSV, and typed XML conversion/round-trip execution
- Add property signatures, expectation-versus-measurement evidence, notices,
target export, and deterministic report export
- Add Toolbox shell integration, offline PWA support, documentation, and
Chromium/Firefox coverage
CONTRIBUTING.md
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# Contributing
Run `npm ci`, `npm run check`, and `npm run test:browser` before proposing a change. Keep processing local, preserve explicit limits, and include fixtures for every parser boundary.
LICENSE
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If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
LICENSES/README.md
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# Licences
The application is GPL-3.0-or-later. Generated release artifacts include an exact runtime dependency licence inventory in `npm-runtime-licenses.txt`.
README.md
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# Format Lab
Explore conversion paths, state the expected preservation boundary, and measure
what a representative round trip actually changes. Format Lab is a local-first
module in the add·ideas Toolbox.
## v0.1.0 capabilities
- Browse directed format graphs for structured data, images, audio/video, and
subtitles
- Choose the properties that matter and rank bounded paths by expected loss,
conditional behaviour, unknowns, and conversion count
- Inspect every edge's availability and explicit caveat; routes are never called
lossless merely because no catalog loss is known
- Execute JSON, NDJSON, CSV, and a typed XML record-dialect conversion path over
a bounded canonical dataset
- Convert back to the source format and measure record/field order, names, scalar
types, nulls, nested values, numbers, and Unicode text
- Display catalog expectations beside measured evidence and mark metadata as
untested when it is outside the canonical model
- Export the target data and a deterministic evidence report containing the
catalog version, exact path, expectations, measurements, and notices
## Honest scope
The image, audio/video, and subtitle graphs are planning contracts linked to the
specialized Toolbox apps; v0.1.0 does not duplicate their codec or renderer
engines. Catalog statuses are conservative expectations, not measurements of a
particular file or encoder. The executable data lab supports records only—not
arbitrary JSON documents, XML mixed content/namespaces, or an external CSV type
schema. Its typed XML output is a documented lab interchange dialect.
Inputs are capped at 2 MiB, 10,000 records, 200 fields per record, 500,000
top-level values, and 8 MiB output. CSV cells are strings and spreadsheet-formula
prefixes are neutralized; the resulting semantic change is visible in the
round-trip measurement.
## Development
```sh
npm ci
npm run check
npm run test:browser
```
`npm run release:artifact` produces a deterministic ZIP and SHA-256 sidecar.
## License
GPL-3.0-or-later. See [LICENSE](LICENSE).
SECURITY.md
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# Security
Please report vulnerabilities privately to the repository owner. Do not attach sensitive source files to public issues. Imported inputs are untrusted; parsers must remain bounded and must not execute active content or fetch external resources.
SOURCE.md
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# Corresponding source
The corresponding source for Format Lab 0.1.0 is available at:
https://git.add-ideas.de/lotobo/format-lab/src/tag/v0.1.0
Build with Node.js 22, npm 11, `npm ci`, and `npm run release:artifact`.
THIRD_PARTY_NOTICES.md
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# Third-party notices
Format Lab 0.1.0 directly depends on these runtime packages:
| Package | Pinned version | Declared licence |
| -------------------------------- | -------------: | ---------------- |
| `@add-ideas/toolbox-contract` | 0.2.3 | Apache-2.0 |
| `@add-ideas/toolbox-helpers` | 0.1.0 | GPL-3.0-or-later |
| `@add-ideas/toolbox-shell-react` | 0.2.3 | Apache-2.0 |
| `react` | 19.2.8 | MIT |
| `react-dom` | 19.2.8 | MIT |
This table covers direct production dependencies, not transitive packages or development tooling. During a release build, the exact non-development dependency tree and discovered licence texts are generated from the lockfile into `LICENSES/npm-runtime-licenses.txt` and included in the release ZIP. Copyright and licence terms remain with their respective authors.
docs/ACCESSIBILITY.md
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# Accessibility
The visual format graph has a descriptive accessible name and is followed by a
complete keyboard-scrollable edge table, so it is never the sole source of
information. Native labelled selects, checkboxes, buttons, text areas, and
tables expose every path and measurement without pointer input.
Expected loss, measured change, conditional status, and unknown state use text
labels in addition to colour. Layouts collapse into document order on smaller
screens. Light, dark, and system themes inherit the shared Toolbox shell, with
visible focus and reduced-motion support.
docs/ARCHITECTURE.md
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# Architecture
The immutable catalog defines formats, domain properties, directed conversion
edges, availability, and a per-property status. A bounded depth-first search
enumerates acyclic paths of at most four conversions. Routes are sorted by the
worst status for the user-selected properties and then by conversion count;
catalog results remain explicitly expected rather than measured.
The executable data lab parses JSON, NDJSON, CSV, and a typed XML record dialect
into a bounded canonical list of records. Every selected edge serializes and
re-parses the canonical data, so losses accumulate along the actual path. The
target is then serialized back to the source format. Stable property signatures
compare record/field order, names, types, nulls, nesting, numeric values, and
Unicode text. Metadata remains not-tested because the canonical model does not
pretend to represent arbitrary wrappers, comments, namespaces, or schemas.
Limits are 2 MiB input, 10,000 records, 200 fields per record, 500,000 top-level
values, JSON depth 64, 200,000 JSON nodes, and 8 MiB output.
docs/PRIVACY-SECURITY.md
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# Privacy and security
Selected files, converted data, and evidence reports remain in browser memory.
There is no upload, telemetry, analytics, remote reference resolution, account,
external font, or codec service. Production policy restricts connections to the
same origin and browser tests reject unexpected requests.
JSON uses bounded parsing and rejects prototype-sensitive field names. XML
DOCTYPE declarations are disabled, values are rendered as text, and generated
XML escapes names and content. CSV parsing is bounded; exports prefix cells that
could be interpreted as spreadsheet formulas. All outputs are explicit
user-triggered downloads.
A matching round-trip signature is evidence only for the bounded canonical
properties and supplied sample. It is not proof of standard conformance,
metadata preservation, codec quality, accessibility, or losslessness for other
files, implementations, settings, or future tool versions.
eslint.config.mjs
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import js from "@eslint/js";
import globals from "globals";
import reactHooks from "eslint-plugin-react-hooks";
import reactRefresh from "eslint-plugin-react-refresh";
import tseslint from "typescript-eslint";
export default tseslint.config(
{
ignores: [
"dist",
"release",
"coverage",
"test-results",
"playwright-report",
],
},
{
extends: [js.configs.recommended, ...tseslint.configs.recommended],
files: ["**/*.{ts,tsx}"],
languageOptions: {
ecmaVersion: 2023,
globals: { ...globals.browser, ...globals.worker },
},
plugins: { "react-hooks": reactHooks, "react-refresh": reactRefresh },
rules: {
...reactHooks.configs.recommended.rules,
"react-refresh/only-export-components": [
"warn",
{ allowConstantExport: true },
],
},
},
{
files: ["scripts/**/*.mjs", "playwright.config.ts"],
languageOptions: { globals: globals.node },
},
);
index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta
name="description"
content="Explore conversion paths and measure format round-trip losses locally."
/>
<link rel="icon" type="image/svg+xml" href="./favicon.svg" />
<link rel="manifest" href="./manifest.webmanifest" />
<meta name="theme-color" content="#29255f" />
<title>Format Lab</title>
</head>
<body>
<div id="root"></div>
<script type="module" src="./src/main.tsx"></script>
</body>
</html>
package-lock.json
Generated
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package.json
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{
"name": "format-lab",
"version": "0.1.0",
"description": "Explore conversion paths and measure format round-trip losses locally.",
"license": "GPL-3.0-or-later",
"author": "Albrecht Degering",
"repository": {
"type": "git",
"url": "git+https://git.add-ideas.de/lotobo/format-lab.git"
},
"homepage": "https://git.add-ideas.de/lotobo/format-lab",
"bugs": {
"url": "https://git.add-ideas.de/lotobo/format-lab/issues"
},
"private": true,
"type": "module",
"engines": {
"node": ">=22"
},
"scripts": {
"predev": "npm run manifest:generate",
"dev": "vite",
"prebuild": "npm run release:prepare && npm run manifest:generate",
"build": "tsc -b && vite build",
"preview": "vite preview",
"typecheck": "tsc -b --pretty false",
"lint": "eslint . --max-warnings=0",
"format": "prettier --write .",
"format:check": "prettier --check .",
"test": "vitest run",
"test:watch": "vitest",
"test:browser": "playwright test",
"manifest:generate": "node scripts/generate-toolbox-manifest.mjs",
"manifest:check": "node scripts/generate-toolbox-manifest.mjs --check",
"release:prepare": "node scripts/prepare-release-files.mjs",
"toolbox:check": "toolbox-check dist",
"package:release": "node scripts/package-release.mjs",
"check": "npm run manifest:check && npm run typecheck && npm run lint && npm run format:check && npm run test && npm run build && npm run toolbox:check",
"release:artifact": "npm run check && npm run test:browser && npm run package:release -- --force"
},
"dependencies": {
"@add-ideas/toolbox-contract": "0.2.3",
"@add-ideas/toolbox-helpers": "0.1.0",
"@add-ideas/toolbox-shell-react": "0.2.3",
"react": "19.2.8",
"react-dom": "19.2.8"
},
"devDependencies": {
"@add-ideas/toolbox-testkit": "0.2.3",
"@eslint/js": "10.0.1",
"@playwright/test": "1.62.1",
"@testing-library/jest-dom": "6.9.1",
"@testing-library/react": "16.3.2",
"@testing-library/user-event": "14.6.1",
"@types/node": "25.9.5",
"@types/react": "19.2.17",
"@types/react-dom": "19.2.5",
"@vitejs/plugin-react": "6.0.3",
"eslint": "10.7.0",
"eslint-plugin-react-hooks": "7.1.1",
"eslint-plugin-react-refresh": "0.5.2",
"globals": "17.7.0",
"jsdom": "29.1.1",
"prettier": "3.9.5",
"typescript": "6.0.3",
"typescript-eslint": "8.64.0",
"vite": "8.2.2",
"vitest": "4.1.11"
},
"packageManager": "npm@11.17.0"
}
playwright.config.ts
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import { defineConfig, devices } from "@playwright/test";
export default defineConfig({
testDir: "./tests/browser",
fullyParallel: false,
workers: 1,
timeout: 120_000,
expect: { timeout: 10_000 },
reporter: [["list"]],
use: { baseURL: "http://127.0.0.1:4201", trace: "retain-on-failure" },
webServer: {
command: "npm run build && node scripts/serve-test.mjs",
url: "http://127.0.0.1:4201",
reuseExistingServer: !process.env.CI,
timeout: 180_000,
},
projects: [
{ name: "chromium", use: { ...devices["Desktop Chrome"] } },
{ name: "firefox", use: { ...devices["Desktop Firefox"] } },
],
});
public/CHANGELOG.md
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# Changelog
## 0.1.0 - 2026-09-01
- Add property-aware conversion graphs for data, image, audio/video, and
subtitle formats
- Add deterministic route enumeration and conservative preservation scoring
- Add bounded JSON, NDJSON, CSV, and typed XML conversion/round-trip execution
- Add property signatures, expectation-versus-measurement evidence, notices,
target export, and deterministic report export
- Add Toolbox shell integration, offline PWA support, documentation, and
Chromium/Firefox coverage
public/CONTRIBUTING.md
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# Contributing
Run `npm ci`, `npm run check`, and `npm run test:browser` before proposing a change. Keep processing local, preserve explicit limits, and include fixtures for every parser boundary.
public/LICENSE
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@@ -0,0 +1,674 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
public/LICENSES/README.md
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# Licences
The application is GPL-3.0-or-later. Generated release artifacts include an exact runtime dependency licence inventory in `npm-runtime-licenses.txt`.
public/LICENSES/npm-runtime-licenses.txt
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public/README.md
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# Format Lab
Explore conversion paths, state the expected preservation boundary, and measure
what a representative round trip actually changes. Format Lab is a local-first
module in the add·ideas Toolbox.
## v0.1.0 capabilities
- Browse directed format graphs for structured data, images, audio/video, and
subtitles
- Choose the properties that matter and rank bounded paths by expected loss,
conditional behaviour, unknowns, and conversion count
- Inspect every edge's availability and explicit caveat; routes are never called
lossless merely because no catalog loss is known
- Execute JSON, NDJSON, CSV, and a typed XML record-dialect conversion path over
a bounded canonical dataset
- Convert back to the source format and measure record/field order, names, scalar
types, nulls, nested values, numbers, and Unicode text
- Display catalog expectations beside measured evidence and mark metadata as
untested when it is outside the canonical model
- Export the target data and a deterministic evidence report containing the
catalog version, exact path, expectations, measurements, and notices
## Honest scope
The image, audio/video, and subtitle graphs are planning contracts linked to the
specialized Toolbox apps; v0.1.0 does not duplicate their codec or renderer
engines. Catalog statuses are conservative expectations, not measurements of a
particular file or encoder. The executable data lab supports records only—not
arbitrary JSON documents, XML mixed content/namespaces, or an external CSV type
schema. Its typed XML output is a documented lab interchange dialect.
Inputs are capped at 2 MiB, 10,000 records, 200 fields per record, 500,000
top-level values, and 8 MiB output. CSV cells are strings and spreadsheet-formula
prefixes are neutralized; the resulting semantic change is visible in the
round-trip measurement.
## Development
```sh
npm ci
npm run check
npm run test:browser
```
`npm run release:artifact` produces a deterministic ZIP and SHA-256 sidecar.
## License
GPL-3.0-or-later. See [LICENSE](LICENSE).
public/SECURITY.md
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# Security
Please report vulnerabilities privately to the repository owner. Do not attach sensitive source files to public issues. Imported inputs are untrusted; parsers must remain bounded and must not execute active content or fetch external resources.
public/SOURCE.md
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# Corresponding source
The corresponding source for Format Lab 0.1.0 is available at:
https://git.add-ideas.de/lotobo/format-lab/src/tag/v0.1.0
Build with Node.js 22, npm 11, `npm ci`, and `npm run release:artifact`.
public/THIRD_PARTY_NOTICES.md
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# Third-party notices
Format Lab 0.1.0 directly depends on these runtime packages:
| Package | Pinned version | Declared licence |
| -------------------------------- | -------------: | ---------------- |
| `@add-ideas/toolbox-contract` | 0.2.3 | Apache-2.0 |
| `@add-ideas/toolbox-helpers` | 0.1.0 | GPL-3.0-or-later |
| `@add-ideas/toolbox-shell-react` | 0.2.3 | Apache-2.0 |
| `react` | 19.2.8 | MIT |
| `react-dom` | 19.2.8 | MIT |
This table covers direct production dependencies, not transitive packages or development tooling. During a release build, the exact non-development dependency tree and discovered licence texts are generated from the lockfile into `LICENSES/npm-runtime-licenses.txt` and included in the release ZIP. Copyright and licence terms remain with their respective authors.
public/docs/ACCESSIBILITY.md
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# Accessibility
The visual format graph has a descriptive accessible name and is followed by a
complete keyboard-scrollable edge table, so it is never the sole source of
information. Native labelled selects, checkboxes, buttons, text areas, and
tables expose every path and measurement without pointer input.
Expected loss, measured change, conditional status, and unknown state use text
labels in addition to colour. Layouts collapse into document order on smaller
screens. Light, dark, and system themes inherit the shared Toolbox shell, with
visible focus and reduced-motion support.
public/docs/ARCHITECTURE.md
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# Architecture
The immutable catalog defines formats, domain properties, directed conversion
edges, availability, and a per-property status. A bounded depth-first search
enumerates acyclic paths of at most four conversions. Routes are sorted by the
worst status for the user-selected properties and then by conversion count;
catalog results remain explicitly expected rather than measured.
The executable data lab parses JSON, NDJSON, CSV, and a typed XML record dialect
into a bounded canonical list of records. Every selected edge serializes and
re-parses the canonical data, so losses accumulate along the actual path. The
target is then serialized back to the source format. Stable property signatures
compare record/field order, names, types, nulls, nesting, numeric values, and
Unicode text. Metadata remains not-tested because the canonical model does not
pretend to represent arbitrary wrappers, comments, namespaces, or schemas.
Limits are 2 MiB input, 10,000 records, 200 fields per record, 500,000 top-level
values, JSON depth 64, 200,000 JSON nodes, and 8 MiB output.
public/docs/PRIVACY-SECURITY.md
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# Privacy and security
Selected files, converted data, and evidence reports remain in browser memory.
There is no upload, telemetry, analytics, remote reference resolution, account,
external font, or codec service. Production policy restricts connections to the
same origin and browser tests reject unexpected requests.
JSON uses bounded parsing and rejects prototype-sensitive field names. XML
DOCTYPE declarations are disabled, values are rendered as text, and generated
XML escapes names and content. CSV parsing is bounded; exports prefix cells that
could be interpreted as spreadsheet formulas. All outputs are explicit
user-triggered downloads.
A matching round-trip signature is evidence only for the bounded canonical
properties and supplied sample. It is not proof of standard conformance,
metadata preservation, codec quality, accessibility, or losslessness for other
files, implementations, settings, or future tool versions.
public/favicon.svg
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-label="Format Lab"><path fill="#5b4ec4" d="M11 4h30l12 12v44H11z"/><path fill="#fff" opacity=".28" d="M41 4v14h12"/><circle cx="21" cy="31" r="5" fill="#fff"/><circle cx="42" cy="27" r="5" fill="#fff"/><circle cx="37" cy="46" r="5" fill="#fff"/><path d="M25 30l12-2m3 4l-2 9m-5 2l-9-8" fill="none" stroke="#fff" stroke-width="4"/></svg>
Side by Side

After

Width:  |  Height:  |  Size: 413 B

public/manifest.webmanifest
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{
"name": "Format Lab",
"short_name": "Format Lab",
"description": "Explore conversion paths and measure information loss locally.",
"start_url": "./",
"scope": "./",
"display": "standalone",
"background_color": "#f6f7fb",
"theme_color": "#29255f",
"icons": [
{
"src": "./favicon.svg",
"sizes": "any",
"type": "image/svg+xml",
"purpose": "any maskable"
}
]
}
public/sw.js
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const CACHE_PREFIX = "format-lab-shell-";
const CACHE_NAME = CACHE_PREFIX + "0.1.0";
const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"];
self.addEventListener("install", (event) => {
event.waitUntil(
caches.open(CACHE_NAME).then(async (cache) => {
await cache.addAll(CORE);
const html = await (await fetch("./")).text();
const assets = [...html.matchAll(/(?:src|href)="(\.\/assets\/[^"]+)"/g)]
.map((match) => match[1])
.filter(Boolean);
await cache.addAll(assets);
}),
);
self.skipWaiting();
});
self.addEventListener("activate", (event) => {
event.waitUntil(
caches
.keys()
.then((keys) =>
Promise.all(
keys
.filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME)
.map((key) => caches.delete(key)),
),
)
.then(() => self.clients.claim()),
);
});
self.addEventListener("fetch", (event) => {
if (event.request.method !== "GET") return;
const url = new URL(event.request.url);
if (
url.origin !== self.location.origin ||
!url.pathname.startsWith(new URL(self.registration.scope).pathname)
)
return;
event.respondWith(
caches.match(event.request).then(
(cached) =>
cached ??
fetch(event.request).then((response) => {
if (response.ok) {
const copy = response.clone();
void caches
.open(CACHE_NAME)
.then((cache) => cache.put(event.request, copy));
}
return response;
}),
),
);
});
public/toolbox-app.json
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{
"$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json",
"schemaVersion": 1,
"id": "de.add-ideas.format-lab",
"name": "Format Lab",
"version": "0.1.0",
"description": "Explore conversion paths and measure information loss locally.",
"entry": "./",
"icon": "./favicon.svg",
"categories": ["data", "developer", "media"],
"tags": [
"conversion",
"round-trip",
"information-loss",
"formats",
"csv",
"json"
],
"integration": {
"contextVersion": 1,
"launchModes": ["navigate", "new-tab"],
"embedding": "unsupported"
},
"requirements": {
"secureContext": false,
"workers": false,
"indexedDb": false,
"crossOriginIsolated": false,
"topLevelContext": false
},
"privacy": {
"processing": "local",
"fileUploads": true,
"telemetry": false,
"label": "Inputs and conversion evidence stay in this browser; nothing is uploaded."
},
"source": {
"repository": "https://git.add-ideas.de/lotobo/format-lab",
"license": "GPL-3.0-or-later"
},
"actions": [
{
"id": "source",
"label": "Source",
"url": "https://git.add-ideas.de/lotobo/format-lab"
}
]
}
scripts/generate-toolbox-manifest.mjs
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import { readFile, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { format } from "prettier";
const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const sourcePath = path.join(root, "src/toolbox/manifest.source.json");
const outputPath = path.join(root, "public/toolbox-app.json");
const source = JSON.parse(await readFile(sourcePath, "utf8"));
const pkg = JSON.parse(await readFile(path.join(root, "package.json"), "utf8"));
const versionSource = await readFile(path.join(root, "src/version.ts"), "utf8");
const appVersion = /^export const APP_VERSION = "([^"]+)";$/mu.exec(
versionSource,
)?.[1];
const repository = "https://git.add-ideas.de/lotobo/" + pkg.name;
if (source.version !== pkg.version || appVersion !== pkg.version)
throw new Error("Version identity drift");
if (
source.id !== "de.add-ideas." + pkg.name ||
source.source?.repository !== repository ||
source.source?.license !== "GPL-3.0-or-later"
)
throw new Error("Manifest source identity is invalid");
const serialized = await format(JSON.stringify(source), {
filepath: outputPath,
});
if (process.argv.includes("--check")) {
if ((await readFile(outputPath, "utf8").catch(() => "")) !== serialized)
throw new Error("public/toolbox-app.json is stale");
console.log("Toolbox manifest is synchronized");
} else {
await writeFile(outputPath, serialized);
console.log("Generated public/toolbox-app.json");
}
scripts/package-release.mjs
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#!/usr/bin/env node
import { createHash } from "node:crypto";
import { execFile } from "node:child_process";
import {
access,
chmod,
copyFile,
cp,
lstat,
mkdir,
mkdtemp,
readFile,
readdir,
rename,
rm,
utimes,
writeFile,
} from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { promisify } from "node:util";
import { fileURLToPath } from "node:url";
const execute = promisify(execFile);
const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const pkg = JSON.parse(await readFile(path.join(root, "package.json"), "utf8"));
const argument = (name, fallback) => {
const index = process.argv.indexOf(name);
return index >= 0 ? process.argv[index + 1] : fallback;
};
const output = path.resolve(
root,
argument("--output", "release/" + pkg.name + "-" + pkg.version + ".zip"),
);
const checksumOutput = output + ".sha256";
const force = process.argv.includes("--force");
if (
path.extname(output).toLowerCase() !== ".zip" ||
output === root ||
output === path.parse(output).root
)
throw new Error("Unsafe release target");
const exists = (file) =>
access(file).then(
() => true,
() => false,
);
if (!force && ((await exists(output)) || (await exists(checksumOutput))))
throw new Error("Release output exists");
const input = path.join(root, "dist");
for (const name of [
"index.html",
"manifest.webmanifest",
"sw.js",
"toolbox-app.json",
"favicon.svg",
"README.md",
"CHANGELOG.md",
"CONTRIBUTING.md",
"LICENSE",
"SECURITY.md",
"SOURCE.md",
"THIRD_PARTY_NOTICES.md",
"LICENSES/README.md",
"LICENSES/npm-runtime-licenses.txt",
"docs/ACCESSIBILITY.md",
"docs/ARCHITECTURE.md",
"docs/PRIVACY-SECURITY.md",
]) {
const details = await lstat(path.join(input, name)).catch(() => null);
if (!details?.isFile() || details.isSymbolicLink())
throw new Error("Missing release file: " + name);
}
const manifest = JSON.parse(
await readFile(path.join(input, "toolbox-app.json"), "utf8"),
);
const repository = "https://git.add-ideas.de/lotobo/" + pkg.name;
if (
manifest.id !== "de.add-ideas." + pkg.name ||
manifest.version !== pkg.version ||
manifest.entry !== "./" ||
manifest.icon !== "./favicon.svg" ||
manifest.source?.repository !== repository
)
throw new Error("Packaged manifest identity is invalid");
if (
/\b(?:src|href)=["']\//iu.test(
await readFile(path.join(input, "index.html"), "utf8"),
)
)
throw new Error("Root-absolute asset reference");
async function collect(directory, prefix = "") {
const files = [];
for (const entry of (await readdir(directory, { withFileTypes: true })).sort(
(a, b) => a.name.localeCompare(b.name),
)) {
const absolute = path.join(directory, entry.name);
const relative = prefix ? prefix + "/" + entry.name : entry.name;
if (entry.isSymbolicLink())
throw new Error("Symlink in release: " + relative);
if (entry.isDirectory()) files.push(...(await collect(absolute, relative)));
else if (entry.isFile()) files.push({ absolute, relative });
else throw new Error("Unsupported release entry: " + relative);
}
return files;
}
const sourceFiles = await collect(input);
for (const file of sourceFiles)
if (
file.relative.endsWith(".map") ||
/(?:^|\/)(?:\.env(?:\.|$)|id_rsa|id_ed25519|.*\.pem$|.*\.key$)/iu.test(
file.relative,
) ||
file.relative.split("/").includes("..")
)
throw new Error("Forbidden release entry: " + file.relative);
await mkdir(path.dirname(output), { recursive: true });
const stagingRoot = await mkdtemp(
path.join(os.tmpdir(), pkg.name + "-release-"),
);
const publicationRoot = await mkdtemp(
path.join(path.dirname(output), "." + pkg.name + "-publish-"),
);
const stagedTree = path.join(stagingRoot, "tree");
const stagedArchive = path.join(stagingRoot, path.basename(output));
try {
await cp(input, stagedTree, { recursive: true });
const timestamp = new Date("1980-01-01T00:00:00.000Z");
for (const file of await collect(stagedTree)) {
await chmod(file.absolute, 0o644);
await utimes(file.absolute, timestamp, timestamp);
}
await execute(
"zip",
[
"-X",
"-q",
"-9",
stagedArchive,
...sourceFiles.map((file) => file.relative),
],
{
cwd: stagedTree,
env: { ...process.env, TZ: "UTC" },
maxBuffer: 1024 * 1024,
},
);
const archive = await readFile(stagedArchive);
const digest = createHash("sha256").update(archive).digest("hex");
const stagedChecksum = stagedArchive + ".sha256";
await writeFile(stagedChecksum, digest + " " + path.basename(output) + "\n");
const publicationArchive = path.join(publicationRoot, path.basename(output));
const publicationChecksum = publicationArchive + ".sha256";
await copyFile(stagedArchive, publicationArchive);
await copyFile(stagedChecksum, publicationChecksum);
if (force) {
await rm(output, { force: true });
await rm(checksumOutput, { force: true });
}
await rename(publicationArchive, output);
await rename(publicationChecksum, checksumOutput);
console.log("Created " + path.relative(root, output) + "\nSHA-256 " + digest);
} finally {
await rm(stagingRoot, { recursive: true, force: true });
await rm(publicationRoot, { recursive: true, force: true });
}
scripts/prepare-release-files.mjs
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import { cp, mkdir, readFile, readdir, rm, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const destination = path.join(root, "public");
for (const name of [
"LICENSE",
"README.md",
"CHANGELOG.md",
"CONTRIBUTING.md",
"SECURITY.md",
"SOURCE.md",
"THIRD_PARTY_NOTICES.md",
]) {
await readFile(path.join(root, name));
await cp(path.join(root, name), path.join(destination, name));
}
for (const directory of ["LICENSES", "docs"]) {
const output = path.join(destination, directory);
await rm(output, { recursive: true, force: true });
await cp(path.join(root, directory), output, { recursive: true });
}
const lock = JSON.parse(
await readFile(path.join(root, "package-lock.json"), "utf8"),
);
const sections = [];
for (const [location, locked] of Object.entries(lock.packages ?? {}).sort(
([a], [b]) => a.localeCompare(b),
)) {
if (!location.includes("node_modules/") || locked.dev === true) continue;
const packageDirectory = path.join(root, location);
const details = JSON.parse(
await readFile(path.join(packageDirectory, "package.json"), "utf8"),
);
const candidates = (await readdir(packageDirectory))
.filter((name) => /^(?:licen[cs]e|copying|notice)(?:\.|$)/iu.test(name))
.sort();
const texts = [];
for (const candidate of candidates) {
try {
texts.push(
"--- " +
candidate +
" ---\n" +
(await readFile(path.join(packageDirectory, candidate), "utf8")),
);
} catch {
/* directory */
}
}
sections.push(
"=".repeat(78) +
"\n" +
details.name +
"@" +
details.version +
"\nDeclared licence: " +
(details.license ?? locked.license ?? "See upstream") +
"\n" +
"=".repeat(78) +
"\n" +
(texts.join("\n\n") || "See upstream package metadata."),
);
}
await mkdir(path.join(destination, "LICENSES"), { recursive: true });
await writeFile(
path.join(destination, "LICENSES/npm-runtime-licenses.txt"),
sections.join("\n\n").trimEnd() + "\n",
);
console.log("Prepared release documentation");
scripts/serve-test.mjs
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import { createServer } from "node:http";
import { readFile, stat } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
const root = path.resolve(
path.dirname(fileURLToPath(import.meta.url)),
"..",
"dist",
);
const prefix = "/deep/nested/format-lab/";
const types = new Map([
[".css", "text/css; charset=utf-8"],
[".html", "text/html; charset=utf-8"],
[".js", "text/javascript; charset=utf-8"],
[".json", "application/json; charset=utf-8"],
[".webmanifest", "application/manifest+json; charset=utf-8"],
[".svg", "image/svg+xml"],
[".md", "text/markdown; charset=utf-8"],
[".txt", "text/plain; charset=utf-8"],
[".wasm", "application/wasm"],
[".png", "image/png"],
[".jpg", "image/jpeg"],
[".webp", "image/webp"],
]);
const headers = {
"Content-Security-Policy":
"default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; media-src 'self' blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self'",
"Cross-Origin-Opener-Policy": "same-origin",
"Cross-Origin-Resource-Policy": "same-origin",
"Permissions-Policy":
"camera=(), microphone=(), geolocation=(), usb=(), payment=()",
"Referrer-Policy": "no-referrer",
"X-Content-Type-Options": "nosniff",
};
const server = createServer(async (request, response) => {
try {
const url = new URL(request.url ?? "/", "http://127.0.0.1");
const relative = decodeURIComponent(url.pathname).startsWith(prefix)
? decodeURIComponent(url.pathname).slice(prefix.length)
: decodeURIComponent(url.pathname).replace(/^\/+/, "");
const normalized = path.posix.normalize(relative || "index.html");
if (
normalized === ".." ||
normalized.startsWith("../") ||
path.isAbsolute(normalized)
) {
response.writeHead(400).end("Bad request");
return;
}
let file = path.join(root, normalized);
if ((await stat(file).catch(() => null))?.isDirectory())
file = path.join(file, "index.html");
const content = await readFile(file);
response.writeHead(200, {
"Content-Type":
types.get(path.extname(file)) ?? "application/octet-stream",
"Cache-Control": "no-cache",
...headers,
});
response.end(content);
} catch {
response.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });
response.end("Not found");
}
});
server.listen(4201, "127.0.0.1", () => console.log("Test server ready"));
src/App.tsx
+35
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import { lazy, Suspense, useState } from "react";
import { AppShell } from "@add-ideas/toolbox-shell-react";
import "@add-ideas/toolbox-shell-react/styles.css";
import "./styles.css";
import { ErrorBoundary } from "./components/ErrorBoundary";
import { HelpDialog } from "./components/HelpDialog";
import { manifest } from "./toolbox/manifest";
const Workbench = lazy(async () => ({
default: (await import("./components/Workbench")).Workbench,
}));
export function App() {
const [helpOpen, setHelpOpen] = useState(false);
return (
<ErrorBoundary>
<AppShell
app={manifest}
manifestUrl="./toolbox-app.json"
helpAction={{ onClick: () => setHelpOpen(true) }}
>
<Suspense
fallback={
<p className="loading" role="status">
Preparing Format Lab…
</p>
}
>
<Workbench />
</Suspense>
</AppShell>
<HelpDialog open={helpOpen} onClose={() => setHelpOpen(false)} />
</ErrorBoundary>
);
}
src/components/ErrorBoundary.tsx
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import { Component, type ErrorInfo, type ReactNode } from "react";
export class ErrorBoundary extends Component<
{ children: ReactNode },
{ error?: Error }
> {
state: { error?: Error } = {};
static getDerivedStateFromError(error: Error) {
return { error };
}
componentDidCatch(error: Error, info: ErrorInfo) {
console.error("Application failure", error, info);
}
render() {
if (this.state.error)
return (
<main className="fatal">
<h1>Format Lab could not continue</h1>
<p>{this.state.error.message}</p>
<button type="button" onClick={() => location.reload()}>
Reload
</button>
</main>
);
return this.props.children;
}
}
src/components/HelpDialog.tsx
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import { useEffect, useRef } from "react";
export function HelpDialog({
open,
onClose,
}: {
open: boolean;
onClose: () => void;
}) {
const dialog = useRef<HTMLDialogElement>(null);
useEffect(() => {
const node = dialog.current;
if (!node) return;
if (open && !node.open) node.showModal();
if (!open && node.open) node.close();
}, [open]);
return (
<dialog
ref={dialog}
className="help-dialog"
onClose={onClose}
onCancel={onClose}
aria-labelledby="help-title"
>
<div className="dialog-heading">
<div>
<p className="eyebrow">Local-first help</p>
<h2 id="help-title">About Format Lab</h2>
</div>
<button type="button" onClick={onClose} aria-label="Close help">
×
</button>
</div>
<p>
Compare declared conversion boundaries across data, image, audio/video,
and subtitle formats. Rank paths using only the properties relevant to
your task.
</p>
<p>
The structured-data lab executes bounded JSON, NDJSON, CSV, and typed
XML round trips locally. “Expected” comes from the catalog; “measured”
describes only the supplied sample and canonical model. Neither is an
unconditional lossless claim.
</p>
</dialog>
);
}
src/components/Workbench.tsx
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import { useMemo, useState, type ChangeEvent } from "react";
import {
stableStringify,
triggerBlobDownload,
} from "@add-ideas/toolbox-helpers";
import {
domains,
edges,
findRoutes,
formats,
labelFor,
properties,
type ConversionRoute,
type DomainId,
type Preservation,
} from "../lab/catalog";
import {
runRoundTrip,
type DataFormat,
type RoundTripResult,
} from "../lab/data";
const SAMPLE = `[
{
"id": 1,
"active": true,
"name": "Café 🚲",
"nullable": null,
"nested": { "score": 1.25 }
},
{
"id": 2,
"active": false,
"name": "=FORMULA",
"nullable": "",
"nested": [1, 2]
}
]`;
interface LabRecord {
result: RoundTripResult;
route: ConversionRoute;
}
function download(text: string, name: string, mediaType: string) {
triggerBlobDownload(new Blob([text], { type: mediaType }), name);
}
function statusLabel(status: Preservation): string {
if (status === "expected-preserved") return "Expected to preserve";
if (status === "expected-lost") return "Expected loss";
if (status === "conditional") return "Conditional";
return "Unknown";
}
function FormatGraph({
domain,
from,
to,
}: {
domain: DomainId;
from: string;
to: string;
}) {
const nodes = formats.filter((format) => format.domain === domain);
const positions = Object.fromEntries(
nodes.map((node, index) => {
const angle = (Math.PI * 2 * index) / nodes.length - Math.PI / 2;
return [
node.id,
{ x: 300 + Math.cos(angle) * 215, y: 190 + Math.sin(angle) * 135 },
];
}),
) as Record<string, { x: number; y: number }>;
const domainEdges = edges.filter(
(edge) => positions[edge.from] && positions[edge.to],
);
return (
<svg
className="format-graph"
viewBox="0 0 600 380"
role="img"
aria-label={`${domains.find((item) => item.id === domain)?.label} conversion graph from ${labelFor(from)} to ${labelFor(to)}`}
>
<defs>
<marker
id={`arrow-${domain}`}
viewBox="0 0 10 10"
refX="8"
refY="5"
markerWidth="5"
markerHeight="5"
orient="auto-start-reverse"
>
<path d="M 0 0 L 10 5 L 0 10 z" />
</marker>
</defs>
{domainEdges.map((edge, index) => {
const start = positions[edge.from]!;
const end = positions[edge.to]!;
return (
<line
key={`${edge.from}-${edge.to}-${index}`}
x1={start.x}
y1={start.y}
x2={end.x}
y2={end.y}
markerEnd={`url(#arrow-${domain})`}
/>
);
})}
{nodes.map((node) => {
const position = positions[node.id]!;
return (
<g
key={node.id}
className={
node.id === from
? "source-node"
: node.id === to
? "target-node"
: ""
}
>
<circle cx={position.x} cy={position.y} r="38" />
<text x={position.x} y={position.y + 5} textAnchor="middle">
{node.label}
</text>
</g>
);
})}
</svg>
);
}
const initialRoute = findRoutes(
"data",
"json",
"csv",
properties.data.map((item) => item.id),
)[0]!;
const initialRecord: LabRecord = {
route: initialRoute,
result: runRoundTrip(SAMPLE, initialRoute),
};
export function Workbench() {
const [domain, setDomain] = useState<DomainId>("data");
const [from, setFrom] = useState("json");
const [to, setTo] = useState("csv");
const [relevant, setRelevant] = useState(
properties.data.map((property) => property.id),
);
const [routeIndex, setRouteIndex] = useState(0);
const [source, setSource] = useState(SAMPLE);
const [sourceName, setSourceName] = useState("round-trip.json");
const [record, setRecord] = useState<LabRecord>(initialRecord);
const [outputView, setOutputView] = useState<"target" | "roundtrip">(
"target",
);
const [error, setError] = useState<string>();
const domainFormats = formats.filter((format) => format.domain === domain);
const routes = useMemo(
() => findRoutes(domain, from, to, relevant),
[domain, from, relevant, to],
);
const selectedRoute = routes[routeIndex] ?? routes[0];
const graphEdges = edges.filter(
(edge) =>
domainFormats.some((format) => format.id === edge.from) &&
domainFormats.some((format) => format.id === edge.to),
);
const report = useMemo(
() =>
`${stableStringify(
{
catalogVersion: "format-catalog-v1",
route: record.route.formats,
expected: record.route.summary,
measured: record.result.measurements,
notes: record.result.notes,
},
2,
{ maxTextChars: 2 * 1024 * 1024, maxDepth: 16, maxNodes: 20_000 },
)}\n`,
[record],
);
const selectDomain = (next: DomainId) => {
const nextFormats = formats.filter((format) => format.domain === next);
setDomain(next);
setFrom(nextFormats[0]!.id);
setTo(nextFormats[1]?.id ?? nextFormats[0]!.id);
setRelevant(properties[next].map((property) => property.id));
setRouteIndex(0);
};
const run = () => {
try {
if (domain !== "data" || !selectedRoute)
throw new TypeError(
"Measured conversion is available for structured-data routes in v0.1. Use the graph as an explicit planning contract for this domain.",
);
const result = runRoundTrip(source, selectedRoute);
setRecord({ route: selectedRoute, result });
setOutputView("target");
setError(undefined);
} catch (reason) {
setError(
`${reason instanceof Error ? reason.message : "Round trip failed."} The previous measured result was retained.`,
);
}
};
const openFile = async (event: ChangeEvent<HTMLInputElement>) => {
const file = event.target.files?.[0];
event.target.value = "";
if (!file) return;
if (file.size > 2 * 1024 * 1024) {
setError("Input file exceeds 2 MiB. The previous result was retained.");
return;
}
const extension = file.name.split(".").at(-1)?.toLowerCase();
const format: DataFormat =
extension === "csv"
? "csv"
: extension === "xml"
? "xml"
: extension === "ndjson" || extension === "jsonl"
? "ndjson"
: "json";
setDomain("data");
setFrom(format);
setTo(format === "csv" ? "json" : "csv");
setRelevant(properties.data.map((property) => property.id));
setRouteIndex(0);
setSource(await file.text());
setSourceName(file.name);
setError(undefined);
};
const measuredByProperty = Object.fromEntries(
record.result.measurements.map((measurement) => [
measurement.property,
measurement,
]),
);
return (
<main className="workbench">
<section className="hero">
<div>
<p className="eyebrow">Conversion paths with evidence</p>
<h1>Format Lab</h1>
<p>
Rank routes by the properties you care about, then measure a real
bounded round trip where the lab has an executable adapter.
</p>
</div>
<span className="privacy-pill">Expected ≠ measured</span>
</section>
<section className="panel explorer" aria-labelledby="explorer-title">
<div className="panel-heading">
<div>
<h2 id="explorer-title">Format path explorer</h2>
<p>
No route is called lossless; every status names its evidence
boundary.
</p>
</div>
</div>
<div className="selection-grid">
<label>
Domain
<select
value={domain}
onChange={(event) => selectDomain(event.target.value as DomainId)}
>
{domains.map((item) => (
<option key={item.id} value={item.id}>
{item.label}
</option>
))}
</select>
</label>
<label>
From
<select
aria-label="From format"
value={from}
onChange={(event) => {
setFrom(event.target.value);
setRouteIndex(0);
}}
>
{domainFormats.map((format) => (
<option key={format.id} value={format.id}>
{format.label}
</option>
))}
</select>
</label>
<label>
To
<select
aria-label="To format"
value={to}
onChange={(event) => {
setTo(event.target.value);
setRouteIndex(0);
}}
>
{domainFormats.map((format) => (
<option key={format.id} value={format.id}>
{format.label}
</option>
))}
</select>
</label>
</div>
<div className="explorer-grid">
<FormatGraph domain={domain} from={from} to={to} />
<div>
<h3>Relevant properties</h3>
<div className="property-list">
{properties[domain].map((property) => (
<label key={property.id}>
<input
type="checkbox"
checked={relevant.includes(property.id)}
onChange={(event) => {
setRelevant((current) =>
event.target.checked
? [...current, property.id]
: current.filter((item) => item !== property.id),
);
setRouteIndex(0);
}}
/>
{property.label}
</label>
))}
</div>
</div>
</div>
<h3>Recommended paths</h3>
<div className="route-list">
{routes.slice(0, 5).map((route, index) => (
<button
type="button"
className="route-card"
aria-pressed={selectedRoute === route}
key={route.formats.join(">")}
onClick={() => setRouteIndex(index)}
>
<strong>{route.formats.map(labelFor).join(" → ")}</strong>
<span>
{route.edges.length || 0} conversion step
{route.edges.length === 1 ? "" : "s"}
</span>
<span className="route-statuses">
{Object.entries(route.summary).map(([property, status]) => (
<small className={status} key={property}>
{
properties[domain].find((item) => item.id === property)
?.label
}
: {statusLabel(status)}
</small>
))}
</span>
</button>
))}
{!routes.length ? (
<p className="empty">
No bounded catalog path connects these formats.
</p>
) : null}
</div>
<details>
<summary>
Inspect all {graphEdges.length} directed conversion contracts
</summary>
<div className="table-scroll" tabIndex={0}>
<table>
<thead>
<tr>
<th>From</th>
<th>To</th>
<th>Available in</th>
<th>Boundary</th>
</tr>
</thead>
<tbody>
{graphEdges.map((edge, index) => (
<tr key={`${edge.from}-${edge.to}-${index}`}>
<td>{labelFor(edge.from)}</td>
<td>{labelFor(edge.to)}</td>
<td>{edge.availability}</td>
<td>{edge.note}</td>
</tr>
))}
</tbody>
</table>
</div>
</details>
</section>
<section className="panel" aria-labelledby="lab-title">
<div className="panel-heading">
<div>
<h2 id="lab-title">Measured structured-data round trip</h2>
<p>
{sourceName} · JSON, NDJSON, CSV and the typed lab XML record
dialect
</p>
</div>
<label className="button file-button">
Open data
<input
type="file"
data-testid="data-file"
accept=".json,.jsonl,.ndjson,.csv,.xml,text/csv,application/json,text/xml"
onChange={(event) => void openFile(event)}
/>
</label>
</div>
<div className="lab-grid">
<div>
<label>
Source data
<textarea
aria-label="Source data"
value={source}
onChange={(event) => setSource(event.target.value)}
rows={22}
spellCheck={false}
/>
</label>
<button
className="primary-button top-gap"
type="button"
disabled={domain !== "data" || !selectedRoute}
onClick={run}
>
Run selected round trip
</button>
{domain !== "data" ? (
<p className="warning">
This v0.1 lab exposes catalog contracts for{" "}
{domains.find((item) => item.id === domain)?.label}; executable
conversion remains in the specialized Toolbox app.
</p>
) : null}
{error ? (
<p className="error" role="alert">
{error}
</p>
) : null}
</div>
<div>
<nav className="tabs" aria-label="Output views">
<button
type="button"
aria-pressed={outputView === "target"}
onClick={() => setOutputView("target")}
>
Target output
</button>
<button
type="button"
aria-pressed={outputView === "roundtrip"}
onClick={() => setOutputView("roundtrip")}
>
Round-trip source
</button>
</nav>
<textarea
aria-label="Conversion output"
readOnly
value={
outputView === "target"
? record.result.targetText
: record.result.roundTripText
}
rows={22}
spellCheck={false}
/>
<div className="action-row top-gap">
<button
type="button"
onClick={() =>
download(
record.result.targetText,
`converted.${record.route.formats.at(-1)}`,
"text/plain;charset=utf-8",
)
}
>
Download target
</button>
<button
type="button"
onClick={() =>
download(report, "format-lab-report.json", "application/json")
}
>
Download evidence report
</button>
</div>
</div>
</div>
<div className="table-scroll evidence-table" tabIndex={0}>
<table>
<thead>
<tr>
<th>Property</th>
<th>Catalog expectation</th>
<th>Round-trip measurement</th>
<th>Evidence boundary</th>
</tr>
</thead>
<tbody>
{properties.data.map((property) => {
const measurement = measuredByProperty[property.id];
return (
<tr key={property.id}>
<th>{property.label}</th>
<td>
<span
className={`status ${record.route.summary[property.id]}`}
>
{statusLabel(
record.route.summary[property.id] ?? "unknown",
)}
</span>
</td>
<td>
<span className={`status ${measurement?.status}`}>
{measurement?.status.replaceAll("-", " ")}
</span>
</td>
<td>{measurement?.detail}</td>
</tr>
);
})}
</tbody>
</table>
</div>
{record.result.notes.length ? (
<ul className="notice-list">
{record.result.notes.map((note) => (
<li key={note}>{note}</li>
))}
</ul>
) : null}
</section>
</main>
);
}
src/lab/catalog.ts
+607
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@@ -0,0 +1,607 @@
export type DomainId = "data" | "image" | "av" | "subtitle";
export type Preservation =
"expected-preserved" | "conditional" | "expected-lost" | "unknown";
export interface FormatDefinition {
id: string;
label: string;
domain: DomainId;
note: string;
}
export interface PropertyDefinition {
id: string;
label: string;
}
export interface ConversionEdge {
from: string;
to: string;
availability: "lab" | "toolbox" | "browser" | "catalog";
statuses: Record<string, Preservation>;
note: string;
}
export interface ConversionRoute {
formats: string[];
edges: ConversionEdge[];
score: number;
summary: Record<string, Preservation>;
}
export const domains: Array<{ id: DomainId; label: string }> = [
{ id: "data", label: "Structured data" },
{ id: "image", label: "Images" },
{ id: "av", label: "Audio & video" },
{ id: "subtitle", label: "Subtitles" },
];
export const properties: Record<DomainId, PropertyDefinition[]> = {
data: [
{ id: "record-order", label: "Record order" },
{ id: "field-names", label: "Field names" },
{ id: "field-order", label: "Field order" },
{ id: "scalar-types", label: "Scalar types" },
{ id: "nulls", label: "Null values" },
{ id: "nested", label: "Nested values" },
{ id: "numbers", label: "Numeric values" },
{ id: "unicode", label: "Unicode text" },
{ id: "metadata", label: "Document metadata" },
],
image: [
{ id: "dimensions", label: "Dimensions" },
{ id: "pixels", label: "Pixel values" },
{ id: "alpha", label: "Alpha channel" },
{ id: "colour", label: "Colour profile / depth" },
{ id: "metadata", label: "EXIF / metadata" },
{ id: "animation", label: "Animation" },
{ id: "vectors", label: "Vector geometry" },
{ id: "editable-text", label: "Editable text" },
],
av: [
{ id: "duration", label: "Duration" },
{ id: "timestamps", label: "Timestamps" },
{ id: "video", label: "Video samples" },
{ id: "audio", label: "Audio samples" },
{ id: "channels", label: "Channel layout" },
{ id: "subtitles", label: "Subtitle tracks" },
{ id: "chapters", label: "Chapters" },
{ id: "metadata", label: "Container metadata" },
],
subtitle: [
{ id: "timing", label: "Cue timing" },
{ id: "text", label: "Cue text" },
{ id: "ids", label: "Cue identifiers" },
{ id: "position", label: "Position / regions" },
{ id: "styles", label: "Styling" },
{ id: "speakers", label: "Speaker semantics" },
{ id: "metadata", label: "Document metadata" },
],
};
export const formats: FormatDefinition[] = [
{
id: "json",
label: "JSON",
domain: "data",
note: "Nested typed values; object order is conventional, not semantic.",
},
{
id: "ndjson",
label: "NDJSON",
domain: "data",
note: "One JSON record per line; no document wrapper.",
},
{
id: "csv",
label: "CSV",
domain: "data",
note: "Rectangular text cells; dialect and type schema are external.",
},
{
id: "xml",
label: "XML",
domain: "data",
note: "Flexible tree with namespaces, attributes and mixed content.",
},
{
id: "png",
label: "PNG",
domain: "image",
note: "Raster, lossless compression, alpha and optional metadata.",
},
{
id: "jpeg",
label: "JPEG",
domain: "image",
note: "Lossy raster without alpha; broad photo support.",
},
{
id: "webp",
label: "WebP",
domain: "image",
note: "Lossy or lossless raster, alpha and animation.",
},
{
id: "svg",
label: "SVG",
domain: "image",
note: "Vector/XML document with text and external-resource risks.",
},
{
id: "wav",
label: "WAV",
domain: "av",
note: "Audio container, commonly uncompressed PCM.",
},
{
id: "flac",
label: "FLAC",
domain: "av",
note: "Lossless compressed audio and metadata.",
},
{
id: "mp3",
label: "MP3",
domain: "av",
note: "Lossy audio with limited channel/metadata models.",
},
{
id: "opus",
label: "Opus",
domain: "av",
note: "Lossy speech/music codec, commonly in Ogg or WebM.",
},
{
id: "mp4",
label: "MP4",
domain: "av",
note: "Timed media container; actual preservation depends on streams.",
},
{
id: "webm",
label: "WebM",
domain: "av",
note: "Web-oriented Matroska profile with constrained codecs.",
},
{
id: "mkv",
label: "Matroska",
domain: "av",
note: "Flexible multi-track container with attachments and chapters.",
},
{
id: "srt",
label: "SRT",
domain: "subtitle",
note: "Simple numbered cues with de-facto inline formatting.",
},
{
id: "vtt",
label: "WebVTT",
domain: "subtitle",
note: "Cue identifiers, settings, regions and web timing.",
},
{
id: "ass",
label: "ASS",
domain: "subtitle",
note: "Rich scripted styling, positioning and events.",
},
{
id: "ttml",
label: "TTML",
domain: "subtitle",
note: "XML timing and styling profiles vary by ecosystem.",
},
];
function statuses(
domain: DomainId,
values: Partial<Record<string, Preservation>>,
): Record<string, Preservation> {
return Object.fromEntries(
properties[domain].map(({ id }) => [id, values[id] ?? "unknown"]),
);
}
const dataTyped = statuses("data", {
"record-order": "expected-preserved",
"field-names": "expected-preserved",
"field-order": "conditional",
"scalar-types": "expected-preserved",
nulls: "expected-preserved",
nested: "expected-preserved",
numbers: "conditional",
unicode: "expected-preserved",
metadata: "conditional",
});
const dataCsv = statuses("data", {
"record-order": "expected-preserved",
"field-names": "expected-preserved",
"field-order": "conditional",
"scalar-types": "expected-lost",
nulls: "expected-lost",
nested: "conditional",
numbers: "conditional",
unicode: "conditional",
metadata: "expected-lost",
});
const rasterLossy = statuses("image", {
dimensions: "expected-preserved",
pixels: "expected-lost",
alpha: "expected-lost",
colour: "conditional",
metadata: "expected-lost",
animation: "expected-lost",
vectors: "expected-lost",
"editable-text": "expected-lost",
});
const rasterConditional = statuses("image", {
dimensions: "expected-preserved",
pixels: "conditional",
alpha: "conditional",
colour: "conditional",
metadata: "expected-lost",
animation: "conditional",
vectors: "expected-lost",
"editable-text": "expected-lost",
});
const audioLossy = statuses("av", {
duration: "conditional",
timestamps: "conditional",
video: "unknown",
audio: "expected-lost",
channels: "conditional",
subtitles: "expected-lost",
chapters: "expected-lost",
metadata: "conditional",
});
const audioLossless = statuses("av", {
duration: "expected-preserved",
timestamps: "conditional",
video: "unknown",
audio: "expected-preserved",
channels: "expected-preserved",
subtitles: "expected-lost",
chapters: "expected-lost",
metadata: "conditional",
});
const remux = statuses("av", {
duration: "conditional",
timestamps: "conditional",
video: "conditional",
audio: "conditional",
channels: "conditional",
subtitles: "conditional",
chapters: "conditional",
metadata: "conditional",
});
const subtitleSimple = statuses("subtitle", {
timing: "conditional",
text: "expected-preserved",
ids: "conditional",
position: "expected-lost",
styles: "expected-lost",
speakers: "conditional",
metadata: "expected-lost",
});
const subtitleRich = statuses("subtitle", {
timing: "conditional",
text: "expected-preserved",
ids: "conditional",
position: "conditional",
styles: "conditional",
speakers: "conditional",
metadata: "conditional",
});
function edge(
from: string,
to: string,
availability: ConversionEdge["availability"],
values: Record<string, Preservation>,
note: string,
): ConversionEdge {
return { from, to, availability, statuses: { ...values }, note };
}
export const edges: ConversionEdge[] = [
edge(
"json",
"ndjson",
"lab",
dataTyped,
"Wrapper-level values and metadata need an explicit record mapping.",
),
edge(
"ndjson",
"json",
"lab",
dataTyped,
"The lab writes an array; an original wrapper is not reconstructed.",
),
edge(
"json",
"xml",
"lab",
dataTyped,
"Measured lab XML uses typed field elements; arbitrary XML mappings differ.",
),
edge(
"xml",
"json",
"lab",
dataTyped,
"Generic XML attributes/mixed content are outside the lab record dialect.",
),
edge(
"ndjson",
"xml",
"lab",
dataTyped,
"Records pass through the bounded canonical model.",
),
edge(
"xml",
"ndjson",
"lab",
dataTyped,
"Document-level XML information is not part of NDJSON.",
),
...["json", "ndjson", "xml"].flatMap((format) => [
edge(
format,
"csv",
"lab",
dataCsv,
"CSV has text cells and no intrinsic null/type/nesting schema.",
),
edge(
"csv",
format,
"lab",
dataCsv,
"CSV cells enter the canonical model as strings.",
),
]),
edge(
"png",
"jpeg",
"browser",
rasterLossy,
"Canvas/JPEG encoding is lossy and flattens alpha.",
),
edge(
"webp",
"jpeg",
"browser",
rasterLossy,
"Decode/re-encode can lose alpha, animation and metadata.",
),
edge(
"svg",
"png",
"toolbox",
rasterConditional,
"Rasterization fixes a resolution and loses editability.",
),
edge(
"svg",
"webp",
"toolbox",
rasterConditional,
"Rasterization and WebP mode/settings determine pixel loss.",
),
edge(
"jpeg",
"png",
"browser",
rasterConditional,
"PNG cannot restore JPEG-discarded samples or metadata.",
),
edge(
"png",
"webp",
"browser",
rasterConditional,
"WebP lossless/lossy mode and animation handling must be measured.",
),
edge(
"webp",
"png",
"browser",
rasterConditional,
"A still PNG cannot retain WebP animation; metadata is commonly stripped.",
),
edge(
"wav",
"flac",
"toolbox",
audioLossless,
"PCM compatibility and metadata mapping still need inspection.",
),
edge(
"flac",
"wav",
"toolbox",
audioLossless,
"Decoded samples can match while metadata/container timing changes.",
),
...["wav", "flac"].flatMap((from) =>
["mp3", "opus"].map((to) =>
edge(
from,
to,
"toolbox",
audioLossy,
"A lossy audio encode discards sample information.",
),
),
),
...["mp3", "opus"].flatMap((from) =>
["wav", "flac"].map((to) =>
edge(
from,
to,
"toolbox",
audioLossy,
"Decoding does not restore information discarded by the source codec.",
),
),
),
edge(
"mp4",
"mkv",
"toolbox",
remux,
"Stream copy is conditional on codec and attachment/metadata mapping.",
),
edge(
"mkv",
"mp4",
"toolbox",
remux,
"MP4 may not represent every Matroska track, attachment or chapter.",
),
edge(
"mkv",
"webm",
"toolbox",
remux,
"WebM accepts a constrained codec/track subset.",
),
edge(
"webm",
"mkv",
"toolbox",
remux,
"The streams may copy while container metadata changes.",
),
edge(
"mp4",
"webm",
"toolbox",
statuses("av", {
...remux,
video: "expected-lost",
audio: "expected-lost",
}),
"Typical codecs require transcoding; inspect each stream.",
),
edge(
"webm",
"mp4",
"toolbox",
statuses("av", {
...remux,
video: "expected-lost",
audio: "expected-lost",
}),
"Typical codecs require transcoding; inspect each stream.",
),
...["srt", "vtt", "ass", "ttml"].flatMap((from) =>
["srt", "vtt", "ass", "ttml"]
.filter((to) => to !== from)
.map((to) =>
edge(
from,
to,
"toolbox",
from === "srt" || to === "srt" ? subtitleSimple : subtitleRich,
"Timing precision, profiles and styling constructs require cue-level verification.",
),
),
),
];
const rank: Record<Preservation, number> = {
"expected-preserved": 0,
conditional: 2,
unknown: 4,
"expected-lost": 8,
};
function summarize(
route: ConversionEdge[],
relevant: string[],
): Record<string, Preservation> {
return Object.fromEntries(
relevant.map((property) => {
const worst = route.reduce<Preservation>(
(current, item) =>
rank[item.statuses[property] ?? "unknown"] > rank[current]
? (item.statuses[property] ?? "unknown")
: current,
"expected-preserved",
);
return [property, worst];
}),
);
}
export function findRoutes(
domain: DomainId,
from: string,
to: string,
relevant: string[],
maxHops = 4,
): ConversionRoute[] {
const allowed = new Set(
formats
.filter((format) => format.domain === domain)
.map((format) => format.id),
);
if (!allowed.has(from) || !allowed.has(to)) return [];
if (from === to)
return [
{
formats: [from],
edges: [],
score: 0,
summary: Object.fromEntries(
relevant.map((property) => [property, "expected-preserved"]),
),
},
];
const routes: ConversionRoute[] = [];
const visit = (
current: string,
path: string[],
pathEdges: ConversionEdge[],
) => {
if (pathEdges.length >= maxHops) return;
for (const item of edges.filter(
(candidate) => candidate.from === current && allowed.has(candidate.to),
)) {
if (path.includes(item.to)) continue;
const nextPath = [...path, item.to];
const nextEdges = [...pathEdges, item];
if (item.to === to) {
const summary = summarize(nextEdges, relevant);
routes.push({
formats: nextPath,
edges: nextEdges,
summary,
score:
Object.values(summary).reduce(
(sum, status) => sum + rank[status],
0,
) +
nextEdges.length * 0.1,
});
} else visit(item.to, nextPath, nextEdges);
}
};
visit(from, [from], []);
return routes.sort(
(left, right) =>
left.score - right.score ||
left.edges.length - right.edges.length ||
left.formats.join(">").localeCompare(right.formats.join(">")),
);
}
export function labelFor(format: string): string {
return formats.find((item) => item.id === format)?.label ?? format;
}
src/lab/data.ts
+457
View File
@@ -0,0 +1,457 @@
import {
parseCsv,
safeJsonParse,
stableStringify,
stringifyCsv,
} from "@add-ideas/toolbox-helpers";
import type { ConversionRoute } from "./catalog";
export type DataFormat = "json" | "ndjson" | "csv" | "xml";
export type MeasurementStatus =
"measured-preserved" | "measured-changed" | "not-tested";
export interface DataDocument {
rows: Array<Record<string, unknown>>;
notes: string[];
}
export interface PropertyMeasurement {
property: string;
status: MeasurementStatus;
detail: string;
}
export interface RoundTripResult {
route: string[];
targetText: string;
roundTripText: string;
original: DataDocument;
roundTrip: DataDocument;
measurements: PropertyMeasurement[];
notes: string[];
}
const MAX_SOURCE_BYTES = 2 * 1024 * 1024;
const MAX_OUTPUT_BYTES = 8 * 1024 * 1024;
const MAX_ROWS = 10_000;
const MAX_COLUMNS = 200;
const MAX_VALUES = 500_000;
const dangerous = new Set(["__proto__", "constructor", "prototype"]);
const encoder = new TextEncoder();
function byteLength(value: string): number {
return encoder.encode(value).byteLength;
}
function assertText(value: string, label: string): string {
if (byteLength(value) > MAX_SOURCE_BYTES)
throw new RangeError(`${label} exceeds the 2 MiB input limit.`);
if (value.includes("\0"))
throw new SyntaxError(`${label} contains NUL bytes.`);
return value;
}
function object(value: unknown): Record<string, unknown> | undefined {
return value !== null && typeof value === "object" && !Array.isArray(value)
? (value as Record<string, unknown>)
: undefined;
}
function validateRows(rows: unknown[], notes: string[]): DataDocument {
if (rows.length > MAX_ROWS)
throw new RangeError(
`Data is limited to ${MAX_ROWS.toLocaleString()} records.`,
);
let values = 0;
const normalized = rows.map((value, index) => {
const record = object(value);
if (!record) throw new TypeError(`Record ${index + 1} must be an object.`);
const keys = Object.keys(record);
if (keys.length > MAX_COLUMNS)
throw new RangeError(
`Record ${index + 1} exceeds ${MAX_COLUMNS} fields.`,
);
for (const key of keys)
if (dangerous.has(key))
throw new TypeError(`Dangerous field name ${key} is rejected.`);
values += keys.length;
if (values > MAX_VALUES)
throw new RangeError(
`Data is limited to ${MAX_VALUES.toLocaleString()} top-level values.`,
);
return Object.fromEntries(keys.map((key) => [key, record[key]]));
});
return { rows: normalized, notes };
}
function parseJson(source: string): DataDocument {
const value = safeJsonParse(assertText(source, "JSON"), {
maxTextChars: MAX_SOURCE_BYTES,
maxDepth: 64,
maxNodes: 200_000,
rejectDangerousKeys: true,
});
const numericNote =
"Numeric measurement begins after browser JSON parsing; lexical precision beyond IEEE-754 is not independently tested.";
if (Array.isArray(value)) return validateRows(value, [numericNote]);
const root = object(value);
if (root && Array.isArray(root.records))
return validateRows(root.records, [
"The JSON records wrapper was mapped to rows; sibling wrapper metadata is outside the canonical model.",
numericNote,
]);
if (root)
return validateRows(
[root],
["A top-level JSON object was treated as one record.", numericNote],
);
throw new TypeError(
"JSON must be an array of objects, an object, or an object with a records array.",
);
}
function parseNdjson(source: string): DataDocument {
const text = assertText(source, "NDJSON");
const lines = text.split(/\r\n|\n|\r/gu).filter((line) => line.trim());
if (lines.length > MAX_ROWS)
throw new RangeError(
`NDJSON is limited to ${MAX_ROWS.toLocaleString()} records.`,
);
const rows = lines.map((line, index) => {
try {
return safeJsonParse(line, {
maxTextChars: MAX_SOURCE_BYTES,
maxDepth: 64,
maxNodes: 100_000,
rejectDangerousKeys: true,
});
} catch (reason) {
throw new SyntaxError(
`NDJSON line ${index + 1}: ${reason instanceof Error ? reason.message : "invalid JSON"}`,
{ cause: reason },
);
}
});
return validateRows(rows, [
"Numeric measurement begins after browser JSON parsing; lexical precision beyond IEEE-754 is not independently tested.",
]);
}
function parseCsvDocument(source: string): DataDocument {
const table = parseCsv(assertText(source, "CSV"), {
maxRows: MAX_ROWS + 1,
maxColumns: MAX_COLUMNS,
maxFieldChars: 256 * 1024,
});
const headers = table[0] ?? [];
if (!headers.length || headers.some((header) => !header))
throw new TypeError("CSV needs a non-empty heading row.");
if (new Set(headers).size !== headers.length)
throw new TypeError("CSV heading names must be unique.");
headers.forEach((header) => {
if (dangerous.has(header))
throw new TypeError(`Dangerous field name ${header} is rejected.`);
});
const rows = table
.slice(1)
.map((cells) =>
Object.fromEntries(
headers.map((header, index) => [header, cells[index] ?? ""]),
),
);
return validateRows(rows, [
"CSV cells were read as strings because CSV carries no intrinsic scalar-type or null schema.",
]);
}
function decodeField(element: Element, notes: string[]): unknown {
const type = element.getAttribute("type") ?? "string";
const text = element.textContent ?? "";
if (type === "string") return text;
if (type === "null") return null;
if (type === "boolean") {
if (text === "true") return true;
if (text === "false") return false;
}
if (type === "number") {
const number = Number(text);
if (Number.isFinite(number)) return number;
}
if (type === "json")
try {
return safeJsonParse(text, {
maxTextChars: MAX_SOURCE_BYTES,
maxDepth: 64,
maxNodes: 100_000,
rejectDangerousKeys: true,
});
} catch {
/* fall through to a visible string and note */
}
notes.push(
`XML field ${element.getAttribute("name") ?? element.localName} has an invalid/unknown ${type} type marker and was kept as text.`,
);
return text;
}
function parseXmlDocument(source: string): DataDocument {
const text = assertText(source, "XML");
if (/<!DOCTYPE/iu.test(text))
throw new SyntaxError("DOCTYPE is disabled for XML conversion.");
const document = new DOMParser().parseFromString(text, "application/xml");
if (document.querySelector("parsererror"))
throw new SyntaxError("XML is not well formed.");
const rowElements = Array.from(document.documentElement.children).filter(
(element) => element.localName === "row",
);
if (!rowElements.length)
throw new TypeError(
"XML needs row elements directly below its document element.",
);
const notes: string[] = [];
const typed = rowElements.some((row) =>
Array.from(row.children).some(
(field) => field.localName === "field" && field.hasAttribute("name"),
),
);
if (!typed)
notes.push(
"Generic XML child elements were mapped to string fields; attributes, namespaces, comments and mixed content are outside this record mapping.",
);
const rows = rowElements.map((row, rowIndex) => {
const record: Record<string, unknown> = Object.create(null) as Record<
string,
unknown
>;
for (const field of Array.from(row.children)) {
const name =
typed && field.localName === "field"
? field.getAttribute("name")
: field.localName;
if (!name)
throw new TypeError(`XML row ${rowIndex + 1} has an unnamed field.`);
if (dangerous.has(name))
throw new TypeError(`Dangerous field name ${name} is rejected.`);
if (Object.hasOwn(record, name))
throw new TypeError(
`XML row ${rowIndex + 1} repeats field ${name}; arrays need an explicit typed JSON field.`,
);
record[name] = typed
? decodeField(field, notes)
: (field.textContent ?? "");
}
return record;
});
return validateRows(rows, notes);
}
export function parseData(source: string, format: DataFormat): DataDocument {
if (format === "json") return parseJson(source);
if (format === "ndjson") return parseNdjson(source);
if (format === "csv") return parseCsvDocument(source);
return parseXmlDocument(source);
}
function escapeXml(value: string): string {
return value
.replaceAll("&", "&amp;")
.replaceAll("<", "&lt;")
.replaceAll(">", "&gt;")
.replaceAll('"', "&quot;")
.replaceAll("'", "&apos;");
}
function xmlField(name: string, value: unknown): string {
const [type, text] =
value === null
? ["null", ""]
: typeof value === "string"
? ["string", value]
: typeof value === "number"
? ["number", String(value)]
: typeof value === "boolean"
? ["boolean", String(value)]
: [
"json",
stableStringify(value, undefined, {
maxTextChars: MAX_OUTPUT_BYTES,
maxDepth: 64,
maxNodes: 200_000,
}),
];
return `<field name="${escapeXml(name)}" type="${type}">${escapeXml(text)}</field>`;
}
function csvCell(value: unknown): unknown {
const text =
value === null
? ""
: typeof value === "object"
? stableStringify(value, undefined, {
maxTextChars: MAX_OUTPUT_BYTES,
maxDepth: 64,
maxNodes: 200_000,
})
: String(value);
return /^[\t\r\n ]*[=+\-@]/u.test(text) ? `'${text}` : text;
}
export function serializeData(
document: DataDocument,
format: DataFormat,
): string {
let output: string;
if (format === "json") output = `${JSON.stringify(document.rows, null, 2)}\n`;
else if (format === "ndjson")
output = `${document.rows.map((row) => JSON.stringify(row)).join("\n")}\n`;
else if (format === "csv") {
const headers: string[] = [];
const seen = new Set<string>();
document.rows.forEach((row) =>
Object.keys(row).forEach((key) => {
if (!seen.has(key)) {
seen.add(key);
headers.push(key);
}
}),
);
output = `${stringifyCsv([
headers,
...document.rows.map((row) =>
headers.map((header) => csvCell(row[header])),
),
])}\r\n`;
} else
output = `<?xml version="1.0" encoding="UTF-8"?>\n<records>\n${document.rows
.map(
(row) =>
` <row>${Object.entries(row)
.map(([name, value]) => xmlField(name, value))
.join("")}</row>`,
)
.join("\n")}\n</records>\n`;
if (byteLength(output) > MAX_OUTPUT_BYTES)
throw new RangeError("Converted output exceeds the 8 MiB limit.");
return output;
}
function scalarType(value: unknown): string {
if (value === null) return "null";
if (Array.isArray(value)) return "array";
return typeof value === "object" ? "object" : typeof value;
}
function signature(
rows: Array<Record<string, unknown>>,
property: string,
): string {
if (property === "record-order")
return stableStringify(rows.map((row) => stableStringify(row)));
if (property === "field-names")
return stableStringify(rows.map((row) => Object.keys(row).sort()));
if (property === "field-order")
return stableStringify(rows.map((row) => Object.keys(row)));
const values: Array<[string, unknown]> = [];
const walk = (value: unknown, path: string) => {
if (property === "scalar-types") values.push([path, scalarType(value)]);
if (property === "nulls" && value === null) values.push([path, null]);
if (property === "nested" && value !== null && typeof value === "object")
values.push([path, value]);
if (property === "numbers" && typeof value === "number")
values.push([path, value]);
if (property === "unicode" && typeof value === "string")
values.push([path, value]);
if (Array.isArray(value))
value.forEach((item, index) => walk(item, `${path}[${index}]`));
else {
const record = object(value);
if (record)
Object.entries(record).forEach(([key, item]) =>
walk(item, `${path}.${key}`),
);
}
};
rows.forEach((row, rowIndex) =>
Object.entries(row).forEach(([key, value]) =>
walk(value, `${rowIndex}.${key}`),
),
);
return stableStringify(values);
}
export function measureData(
original: DataDocument,
roundTrip: DataDocument,
): PropertyMeasurement[] {
return [
"record-order",
"field-names",
"field-order",
"scalar-types",
"nulls",
"nested",
"numbers",
"unicode",
]
.map<PropertyMeasurement>((property) => {
const left = signature(original.rows, property);
const right = signature(roundTrip.rows, property);
return {
property,
status: left === right ? "measured-preserved" : "measured-changed",
detail:
left === right
? "The bounded canonical signatures matched after the complete round trip."
: "The bounded canonical signatures differed after the complete round trip.",
};
})
.concat({
property: "metadata",
status: "not-tested",
detail:
"The record lab does not model arbitrary document metadata, comments, namespaces or wrappers.",
});
}
export function runRoundTrip(
source: string,
route: ConversionRoute,
): RoundTripResult {
if (
!route.formats.length ||
route.formats.some(
(format) => !["json", "ndjson", "csv", "xml"].includes(format),
)
)
throw new TypeError(
"The measured lab currently runs structured-data routes only.",
);
const sourceFormat = route.formats[0] as DataFormat;
const original = parseData(source, sourceFormat);
let current = original;
let targetText = source;
const notes = [...original.notes];
for (const format of route.formats.slice(1)) {
targetText = serializeData(current, format as DataFormat);
current = parseData(targetText, format as DataFormat);
notes.push(
...current.notes.map((note) => `${format.toUpperCase()}: ${note}`),
);
}
const roundTripText = serializeData(current, sourceFormat);
const roundTrip = parseData(roundTripText, sourceFormat);
notes.push(
...roundTrip.notes.map(
(note) => `Round-trip ${sourceFormat.toUpperCase()}: ${note}`,
),
);
return {
route: route.formats,
targetText,
roundTripText,
original,
roundTrip,
measurements: measureData(original, roundTrip),
notes: [...new Set(notes)],
};
}
src/main.tsx
+18
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import { StrictMode } from "react";
import { createRoot } from "react-dom/client";
import { App } from "./App";
createRoot(document.getElementById("root")!).render(
<StrictMode>
<App />
</StrictMode>,
);
if ("serviceWorker" in navigator && import.meta.env.PROD) {
window.addEventListener("load", () => {
const url = new URL("./sw.js", document.baseURI);
void navigator.serviceWorker
.register(url, { scope: new URL("./", document.baseURI).pathname })
.catch(() => undefined);
});
}
src/styles.css
+768
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:root {
font-family:
Inter,
ui-sans-serif,
system-ui,
-apple-system,
BlinkMacSystemFont,
"Segoe UI",
sans-serif;
color: #242233;
background: #f3f4f8;
font-synthesis: none;
--surface: #fff;
--surface-muted: #f3f1fa;
--line: #d8d6e5;
--ink-muted: #66637a;
--accent: #5b4ec4;
--accent-dark: #4336a4;
--danger: #a5263d;
--warning: #8a5700;
--success: #187148;
}
:root[data-toolbox-theme="dark"] {
color: #f0eff8;
background: #15141b;
--surface: #211f29;
--surface-muted: #2a2735;
--line: #454153;
--ink-muted: #b9b5c8;
--accent: #a99cff;
--accent-dark: #c0b7ff;
--danger: #ff91a2;
--warning: #ffd078;
--success: #78d7a9;
}
@media (prefers-color-scheme: dark) {
:root:not([data-toolbox-theme="light"]) {
color: #f0eff8;
background: #15141b;
--surface: #211f29;
--surface-muted: #2a2735;
--line: #454153;
--ink-muted: #b9b5c8;
--accent: #a99cff;
--accent-dark: #c0b7ff;
--danger: #ff91a2;
--warning: #ffd078;
--success: #78d7a9;
}
}
* {
box-sizing: border-box;
}
body {
min-width: 320px;
min-height: 100vh;
margin: 0;
background: inherit;
color: inherit;
}
button,
input,
select,
textarea {
color: inherit;
font: inherit;
}
button,
.button,
input,
select,
textarea {
border: 1px solid var(--line);
border-radius: 0.72rem;
background: var(--surface);
}
button,
.button {
min-height: 2.65rem;
padding: 0.58rem 0.9rem;
cursor: pointer;
font-weight: 750;
}
button:hover,
.button:hover {
border-color: var(--accent);
}
button:disabled {
cursor: not-allowed;
opacity: 0.55;
}
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.button:focus-within {
outline: 3px solid color-mix(in srgb, var(--accent) 36%, transparent);
outline-offset: 2px;
}
input,
select,
textarea {
width: 100%;
min-height: 2.55rem;
padding: 0.55rem 0.65rem;
}
textarea {
resize: vertical;
font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
font-size: 0.84rem;
line-height: 1.5;
tab-size: 2;
}
.workbench {
width: min(100%, 90rem);
margin: 0 auto;
padding: 1.4rem clamp(0.75rem, 2.5vw, 2rem) 3rem;
}
.hero,
.panel-heading,
.source-grid,
.option-grid,
.tabs,
.workspace-grid,
.range-inputs {
display: flex;
}
.hero {
align-items: flex-start;
justify-content: space-between;
gap: 1.2rem;
margin-bottom: 1rem;
}
h1,
h2,
h3,
p {
margin-top: 0;
}
h1 {
margin-bottom: 0.35rem;
font-size: clamp(1.85rem, 4vw, 3rem);
}
h2 {
margin-bottom: 0;
font-size: 1.16rem;
}
.hero > div > p:last-child {
max-width: 52rem;
margin-bottom: 0;
color: var(--ink-muted);
}
.eyebrow {
margin-bottom: 0.28rem;
color: var(--accent-dark);
font-size: 0.74rem;
font-weight: 850;
letter-spacing: 0.09em;
text-transform: uppercase;
}
.privacy-pill,
.count-pill {
flex: none;
border: 1px solid color-mix(in srgb, var(--success) 48%, var(--line));
border-radius: 999px;
padding: 0.48rem 0.72rem;
color: var(--success);
font-size: 0.8rem;
font-weight: 800;
}
.panel {
margin-bottom: 0.85rem;
border: 1px solid var(--line);
border-radius: 1rem;
background: var(--surface);
box-shadow: 0 0.45rem 1.4rem color-mix(in srgb, #151126 7%, transparent);
padding: 1rem;
}
.panel-heading {
align-items: center;
justify-content: space-between;
gap: 0.85rem;
margin-bottom: 0.85rem;
}
.panel-heading p {
margin: 0.2rem 0 0;
color: var(--ink-muted);
font-size: 0.88rem;
}
.file-button {
position: relative;
display: inline-flex;
align-items: center;
white-space: nowrap;
}
.file-button input {
position: absolute;
width: 1px;
height: 1px;
overflow: hidden;
clip: rect(0 0 0 0);
}
.source-grid,
.option-grid {
align-items: end;
flex-wrap: wrap;
gap: 0.65rem;
margin-bottom: 0.72rem;
}
.source-grid label,
.option-grid label,
.panel-heading label {
display: grid;
gap: 0.28rem;
min-width: 10rem;
color: var(--ink-muted);
font-size: 0.8rem;
font-weight: 750;
}
.source-grid label {
flex: 1 1 14rem;
}
.option-grid label {
flex: 1 1 10rem;
}
.primary-button {
border-color: var(--accent);
background: var(--accent);
color: #fff;
}
:root[data-toolbox-theme="dark"] .primary-button {
color: #17131f;
}
.tabs {
gap: 0.35rem;
overflow-x: auto;
margin: 0 0 0.85rem;
padding: 0.1rem 0;
}
.tabs button {
white-space: nowrap;
}
.tabs button[aria-pressed="true"] {
border-color: var(--accent);
background: var(--surface-muted);
color: var(--accent-dark);
}
.workspace-grid {
align-items: stretch;
gap: 0.85rem;
}
.workspace-grid > * {
min-width: 0;
flex: 1 1 0;
}
.table-scroll {
max-width: 100%;
overflow: auto;
border: 1px solid var(--line);
border-radius: 0.8rem;
}
.table-scroll:focus-visible {
outline: 3px solid color-mix(in srgb, var(--accent) 36%, transparent);
}
table {
width: 100%;
border-collapse: collapse;
font-size: 0.84rem;
}
th,
td {
border-bottom: 1px solid var(--line);
padding: 0.55rem;
text-align: left;
vertical-align: top;
}
thead th {
position: sticky;
top: 0;
z-index: 1;
background: var(--surface-muted);
white-space: nowrap;
}
tbody tr:last-child > * {
border-bottom: 0;
}
.field-table {
min-width: 70rem;
}
.field-table input,
.field-table select {
min-width: 8rem;
}
.flag-cell label {
display: flex;
align-items: center;
gap: 0.35rem;
white-space: nowrap;
}
.flag-cell label + label {
margin-top: 0.4rem;
}
.flag-cell input {
width: auto;
min-height: 0;
}
.range-inputs {
gap: 0.35rem;
}
.range-inputs input {
min-width: 6rem;
}
.icon-button {
min-height: 2.3rem;
padding: 0.4rem 0.62rem;
font-size: 0.78rem;
}
.danger {
color: var(--danger);
}
.records {
max-height: 42rem;
}
.records td {
max-width: 18rem;
overflow-wrap: anywhere;
font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}
.export-panel textarea {
min-height: 30rem;
}
.violation-list {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
gap: 0.55rem;
margin: 0;
padding: 0;
list-style: none;
}
.violation-list li {
display: flex;
align-items: center;
justify-content: space-between;
gap: 0.7rem;
border: 1px solid color-mix(in srgb, var(--danger) 38%, var(--line));
border-radius: 0.7rem;
padding: 0.58rem;
}
.violation-list strong {
color: var(--danger);
font-size: 0.78rem;
}
.warning,
.error,
.success,
.empty {
margin: 0.65rem 0 0;
font-size: 0.88rem;
}
.warning {
color: var(--warning);
}
.error {
border: 1px solid color-mix(in srgb, var(--danger) 45%, var(--line));
border-radius: 0.72rem;
background: color-mix(in srgb, var(--danger) 8%, var(--surface));
padding: 0.66rem;
color: var(--danger);
}
.success {
color: var(--success);
}
.empty {
color: var(--ink-muted);
}
.top-gap {
margin-top: 0.75rem;
}
.preset-row,
.action-row {
display: flex;
flex-wrap: wrap;
gap: 0.55rem;
}
.preset-row {
margin-bottom: 0.85rem;
}
.work-grid {
display: grid;
grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.82fr);
align-items: start;
gap: 0.85rem;
}
.work-grid > * {
min-width: 0;
}
.input-panel > label,
.predicate-panel > label,
.compact-grid label {
display: grid;
gap: 0.3rem;
margin-bottom: 0.7rem;
color: var(--ink-muted);
font-size: 0.8rem;
font-weight: 750;
}
.input-panel > label:first-of-type {
max-width: 15rem;
}
.compact-grid {
display: grid;
grid-template-columns: minmax(0, 1fr) minmax(6rem, 0.32fr);
gap: 0.55rem;
}
.compact-grid label:first-child:last-child,
.compact-grid label:nth-child(3) {
grid-column: 1 / -1;
}
.check-row {
display: flex !important;
grid-template-columns: auto 1fr;
align-items: center;
flex-direction: row;
}
.check-row input {
width: auto;
min-height: 0;
}
.limits {
margin-top: 0.85rem;
}
.running {
margin: 0.75rem 0 0;
color: var(--accent-dark);
font-weight: 750;
}
.result-panel textarea {
min-height: 18rem;
}
.step-list {
max-height: 18rem;
overflow: auto;
padding-left: 1.5rem;
color: var(--ink-muted);
font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
font-size: 0.8rem;
}
.selection-grid,
.explorer-grid,
.lab-grid {
display: grid;
gap: 0.75rem;
}
.selection-grid {
grid-template-columns: repeat(3, minmax(0, 1fr));
margin-bottom: 0.85rem;
}
.selection-grid label,
.lab-grid label {
display: grid;
gap: 0.3rem;
color: var(--ink-muted);
font-size: 0.8rem;
font-weight: 750;
}
.explorer-grid {
grid-template-columns: minmax(0, 1.45fr) minmax(15rem, 0.55fr);
align-items: center;
margin-bottom: 0.9rem;
}
.format-graph {
width: 100%;
max-height: 24rem;
border: 1px solid var(--line);
border-radius: 0.85rem;
background: var(--surface-muted);
}
.format-graph line {
stroke: color-mix(in srgb, var(--ink-muted) 52%, transparent);
stroke-width: 1.3;
}
.format-graph marker path {
fill: var(--ink-muted);
}
.format-graph circle {
fill: var(--surface);
stroke: var(--line);
stroke-width: 2;
}
.format-graph text {
fill: currentColor;
font-size: 14px;
font-weight: 800;
}
.format-graph .source-node circle {
fill: color-mix(in srgb, var(--accent) 14%, var(--surface));
stroke: var(--accent);
stroke-width: 4;
}
.format-graph .target-node circle {
stroke: var(--success);
stroke-width: 4;
}
.property-list {
display: grid;
gap: 0.42rem;
}
.property-list label {
display: flex;
align-items: center;
gap: 0.45rem;
font-size: 0.86rem;
}
.property-list input {
width: auto;
min-height: 0;
}
.route-list {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
gap: 0.6rem;
margin-bottom: 0.8rem;
}
.route-card {
display: grid;
align-content: start;
gap: 0.38rem;
min-width: 0;
text-align: left;
}
.route-card[aria-pressed="true"] {
border-color: var(--accent);
background: var(--surface-muted);
box-shadow: inset 0 0 0 1px var(--accent);
}
.route-card > span:not(.route-statuses) {
color: var(--ink-muted);
font-size: 0.78rem;
}
.route-statuses {
display: flex;
flex-wrap: wrap;
gap: 0.3rem;
}
.route-statuses small,
.status {
border-radius: 999px;
padding: 0.22rem 0.42rem;
font-size: 0.7rem;
font-weight: 750;
}
.expected-preserved,
.measured-preserved {
background: color-mix(in srgb, var(--success) 13%, var(--surface));
color: var(--success);
}
.conditional,
.not-tested {
background: color-mix(in srgb, var(--warning) 13%, var(--surface));
color: var(--warning);
}
.expected-lost,
.measured-changed {
background: color-mix(in srgb, var(--danger) 13%, var(--surface));
color: var(--danger);
}
.unknown {
background: var(--surface-muted);
color: var(--ink-muted);
}
.lab-grid {
grid-template-columns: repeat(2, minmax(0, 1fr));
align-items: start;
margin-bottom: 1rem;
}
.lab-grid textarea {
min-height: 25rem;
}
.evidence-table {
margin-top: 0.8rem;
}
.notice-list {
margin: 0.8rem 0 0;
padding-left: 1.3rem;
color: var(--warning);
font-size: 0.84rem;
}
details {
margin-top: 0.7rem;
}
summary {
cursor: pointer;
font-weight: 750;
}
.loading,
.fatal {
width: min(100%, 90rem);
margin: 2rem auto;
padding: 1rem;
}
.help-dialog {
width: min(38rem, calc(100vw - 2rem));
border: 1px solid var(--line);
border-radius: 1rem;
background: var(--surface);
color: inherit;
padding: 1rem;
}
.help-dialog::backdrop {
background: rgb(16 14 25 / 58%);
}
.dialog-heading {
display: flex;
align-items: flex-start;
justify-content: space-between;
gap: 1rem;
}
@media (max-width: 860px) {
.hero,
.workspace-grid {
flex-direction: column;
}
.privacy-pill {
align-self: flex-start;
}
.workspace-grid > * {
width: 100%;
}
.panel-heading {
align-items: flex-start;
flex-wrap: wrap;
}
.work-grid {
grid-template-columns: 1fr;
}
.selection-grid,
.explorer-grid,
.lab-grid {
grid-template-columns: 1fr;
}
}
@media (prefers-reduced-motion: reduce) {
*,
*::before,
*::after {
scroll-behavior: auto !important;
transition: none !important;
}
}
src/test/setup.ts
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import "@testing-library/jest-dom/vitest";
import { afterEach } from "vitest";
import { cleanup } from "@testing-library/react";
afterEach(() => {
cleanup();
localStorage.clear();
});
src/toolbox/manifest.source.json
+48
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{
"$schema": "https://git.add-ideas.de/lotobo/toolbox-sdk/raw/branch/main/schemas/toolbox-app.v1.schema.json",
"schemaVersion": 1,
"id": "de.add-ideas.format-lab",
"name": "Format Lab",
"version": "0.1.0",
"description": "Explore conversion paths and measure information loss locally.",
"entry": "./",
"icon": "./favicon.svg",
"categories": ["data", "developer", "media"],
"tags": [
"conversion",
"round-trip",
"information-loss",
"formats",
"csv",
"json"
],
"integration": {
"contextVersion": 1,
"launchModes": ["navigate", "new-tab"],
"embedding": "unsupported"
},
"requirements": {
"secureContext": false,
"workers": false,
"indexedDb": false,
"crossOriginIsolated": false,
"topLevelContext": false
},
"privacy": {
"processing": "local",
"fileUploads": true,
"telemetry": false,
"label": "Inputs and conversion evidence stay in this browser; nothing is uploaded."
},
"source": {
"repository": "https://git.add-ideas.de/lotobo/format-lab",
"license": "GPL-3.0-or-later"
},
"actions": [
{
"id": "source",
"label": "Source",
"url": "https://git.add-ideas.de/lotobo/format-lab"
}
]
}
src/toolbox/manifest.ts
+4
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import { defineToolboxApp, parseToolboxApp } from "@add-ideas/toolbox-contract";
import source from "./manifest.source.json";
export const manifest = defineToolboxApp(parseToolboxApp(source));
src/version.ts
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export const APP_VERSION = "0.1.0";
src/vite-env.d.ts
Vendored
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/// <reference types="vite/client" />
tests/browser/app.spec.ts
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import { expect, test, type Page } from "@playwright/test";
const ORIGIN = "http://127.0.0.1:4201";
async function watchLocalOnly(page: Page) {
const external: string[] = [];
await page.route("**/*", async (route) => {
const url = new URL(route.request().url());
if (url.origin !== ORIGIN) {
external.push(url.href);
await route.abort();
} else await route.continue();
});
return external;
}
test("explores a real directed format graph at a nested path", async ({
page,
}) => {
await page.setViewportSize({ width: 1800, height: 1000 });
const external = await watchLocalOnly(page);
await page.goto("/deep/nested/format-lab/");
await expect(page.getByRole("heading", { name: "Format Lab" })).toBeVisible();
await page.getByLabel("Domain").selectOption("image");
await expect(
page.getByRole("img", {
name: /Images conversion graph from PNG to JPEG/u,
}),
).toBeVisible();
await expect(
page.getByText(/This v0.1 lab exposes catalog contracts for Images/u),
).toBeVisible();
expect(external).toEqual([]);
expect(
await page
.locator(".toolbox-shell__main")
.evaluate((node) => getComputedStyle(node).width),
).toBe("1440px");
});
test("measures a typed XML round trip and downloads both outputs", async ({
page,
}) => {
await page.goto("/deep/nested/format-lab/");
await page.getByLabel("To format").selectOption("xml");
await page.getByRole("button", { name: /^JSON → XML/u }).click();
await page.getByRole("button", { name: "Run selected round trip" }).click();
const output = page.getByRole("textbox", {
name: "Conversion output",
exact: true,
});
await expect(output).toContainText(
'<field name="active" type="boolean">true',
);
await expect(
page.getByRole("row", { name: /Nested values.*measured preserved/u }),
).toBeVisible();
const targetDownload = page.waitForEvent("download");
await page.getByRole("button", { name: "Download target" }).click();
expect((await targetDownload).suggestedFilename()).toBe("converted.xml");
const reportDownload = page.waitForEvent("download");
await page.getByRole("button", { name: "Download evidence report" }).click();
expect((await reportDownload).suggestedFilename()).toBe(
"format-lab-report.json",
);
});
test("shows CSV losses and retains evidence after invalid source", async ({
page,
}) => {
await page.goto("/deep/nested/format-lab/");
await expect(
page.getByRole("row", { name: /Scalar types.*measured changed/u }),
).toBeVisible();
const output = page.getByRole("textbox", {
name: "Conversion output",
exact: true,
});
const previous = await output.inputValue();
await page.getByLabel("Source data").fill("[");
await page.getByRole("button", { name: "Run selected round trip" }).click();
await expect(page.getByRole("alert")).toContainText("retained");
await expect(output).toHaveValue(previous);
});
test("integrates help, themes, identity, headers and offline reload", async ({
page,
request,
context,
}) => {
await page.goto("/deep/nested/format-lab/");
await page.getByRole("button", { name: "Help" }).click();
await expect(
page.getByRole("dialog", { name: "About Format Lab" }),
).toContainText("lossless claim");
await page.keyboard.press("Escape");
await page.getByRole("button", { name: "Personalize" }).click();
await page.getByRole("button", { name: "Dark" }).click();
await expect(page.locator(".toolbox-shell").first()).toHaveAttribute(
"data-toolbox-theme",
"dark",
);
expect(
await page.evaluate(async () =>
Boolean(await navigator.serviceWorker.ready),
),
).toBe(true);
const index = await request.get("/deep/nested/format-lab/");
expect(index.headers()["content-security-policy"]).toContain(
"connect-src 'self'",
);
expect(await index.text()).not.toMatch(/\b(?:src|href)=["']\//u);
const manifest = await request.get(
"/deep/nested/format-lab/toolbox-app.json",
);
await expect(manifest.json()).resolves.toMatchObject({
id: "de.add-ideas.format-lab",
version: "0.1.0",
privacy: { processing: "local", telemetry: false },
});
await context.setOffline(true);
await page.reload();
await expect(page.getByRole("heading", { name: "Format Lab" })).toBeVisible();
});
tests/components/app.test.tsx
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import { render, screen } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { describe, expect, it } from "vitest";
import { Workbench } from "../../src/components/Workbench";
describe("Format Lab workbench", () => {
it("shows catalog expectations beside initial measured changes", () => {
render(<Workbench />);
expect(
screen.getByRole("heading", { name: "Format Lab" }),
).toBeInTheDocument();
expect(screen.getAllByText("measured changed").length).toBeGreaterThan(0);
expect(
screen.getByRole("row", { name: /Document metadata.*not tested/iu }),
).toBeInTheDocument();
});
it("retains evidence after malformed input and disables unsupported execution", async () => {
const user = userEvent.setup();
render(<Workbench />);
const previous = (
screen.getByLabelText("Conversion output") as HTMLTextAreaElement
).value;
await user.clear(screen.getByLabelText("Source data"));
await user.type(screen.getByLabelText("Source data"), "[[");
await user.click(
screen.getByRole("button", { name: "Run selected round trip" }),
);
expect(screen.getByRole("alert")).toHaveTextContent(/retained/u);
expect(screen.getByLabelText("Conversion output")).toHaveValue(previous);
await user.selectOptions(screen.getByLabelText("Domain"), "image");
expect(
screen.getByRole("button", { name: "Run selected round trip" }),
).toBeDisabled();
});
});
tests/lab/catalog.test.ts
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import { describe, expect, it } from "vitest";
import { findRoutes, properties } from "../../src/lab/catalog";
describe("format catalog", () => {
it("prefers the lower-loss route for selected properties", () => {
const routes = findRoutes("data", "json", "xml", [
"scalar-types",
"nested",
"nulls",
]);
expect(routes[0]?.formats).toEqual(["json", "xml"]);
expect(routes[0]?.summary).toMatchObject({
"scalar-types": "expected-preserved",
nested: "expected-preserved",
});
expect(
routes.find((route) => route.formats.includes("csv"))?.score,
).toBeGreaterThan(routes[0]!.score);
});
it("enumerates bounded acyclic routes and identity evidence", () => {
const routes = findRoutes(
"subtitle",
"ass",
"srt",
properties.subtitle.map((item) => item.id),
);
expect(routes.length).toBeGreaterThan(0);
expect(
routes.every(
(route) =>
route.edges.length <= 4 &&
new Set(route.formats).size === route.formats.length,
),
).toBe(true);
expect(findRoutes("image", "png", "png", ["pixels"])[0]).toMatchObject({
formats: ["png"],
score: 0,
});
});
it("does not invent paths between incompatible audio and video families", () => {
expect(findRoutes("av", "wav", "mp4", ["audio"])).toEqual([]);
});
});
tests/lab/data.test.ts
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import { describe, expect, it } from "vitest";
import { findRoutes, properties } from "../../src/lab/catalog";
import { parseData, runRoundTrip, serializeData } from "../../src/lab/data";
const all = properties.data.map((property) => property.id);
const sample = JSON.stringify([
{
id: 1,
active: true,
nullable: null,
nested: { score: 1.25 },
text: "Café 🚲",
},
]);
describe("structured data lab", () => {
it("measures typed XML round trips without claiming metadata", () => {
const route = findRoutes("data", "json", "xml", all)[0]!;
const result = runRoundTrip(sample, route);
expect(result.targetText).toContain(
'<field name="active" type="boolean">true',
);
expect(
result.measurements.filter(
(measurement) => measurement.status === "measured-changed",
),
).toEqual([]);
expect(result.measurements.at(-1)).toMatchObject({
property: "metadata",
status: "not-tested",
});
});
it("exposes CSV type, null and nested-value changes", () => {
const route = findRoutes("data", "json", "csv", all)[0]!;
const result = runRoundTrip(sample, route);
const changed = result.measurements
.filter((measurement) => measurement.status === "measured-changed")
.map((measurement) => measurement.property);
expect(changed).toEqual(
expect.arrayContaining(["scalar-types", "nulls", "nested", "numbers"]),
);
expect(result.notes.join(" ")).toContain("CSV cells");
});
it("neutralizes spreadsheet formulas and keeps the change measurable", () => {
const document = parseData('[{"value":" =2+2"}]', "json");
const csv = serializeData(document, "csv");
expect(csv).toContain("' =2+2");
const route = findRoutes("data", "json", "csv", all)[0]!;
expect(
runRoundTrip('[{"value":" =2+2"}]', route).measurements.find(
(measurement) => measurement.property === "unicode",
),
).toMatchObject({ status: "measured-changed" });
});
it("imports generic XML honestly and rejects active or dangerous input", () => {
const generic = parseData(
"<records><row><id>1</id><name>Ada</name></row></records>",
"xml",
);
expect(generic.rows).toEqual([{ id: "1", name: "Ada" }]);
expect(generic.notes.join(" ")).toMatch(/string fields/u);
expect(() =>
parseData('<!DOCTYPE x [<!ENTITY e "x">]><records/>', "xml"),
).toThrow(/DOCTYPE/u);
expect(() => parseData("__proto__,name\nvalue,Ada", "csv")).toThrow(
/Dangerous/u,
);
});
it("rejects duplicate headings and non-record JSON", () => {
expect(() => parseData("id,id\n1,2", "csv")).toThrow(/unique/u);
expect(() => parseData("[1,2]", "json")).toThrow(/Record 1/u);
});
});
tsconfig.app.json
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{
"compilerOptions": {
"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
"target": "ES2023",
"lib": ["ES2023", "DOM", "DOM.Iterable"],
"module": "ESNext",
"types": ["vite/client"],
"allowArbitraryExtensions": true,
"skipLibCheck": true,
"moduleResolution": "Bundler",
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"moduleDetection": "force",
"noEmit": true,
"jsx": "react-jsx",
"noUnusedLocals": true,
"noUnusedParameters": true,
"erasableSyntaxOnly": true,
"noFallthroughCasesInSwitch": true,
"strict": true,
"noUncheckedIndexedAccess": true,
"useDefineForClassFields": true,
"resolveJsonModule": true,
"isolatedModules": true
},
"include": ["src", "tests"]
}
tsconfig.json
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{
"files": [],
"references": [
{
"path": "./tsconfig.app.json"
},
{
"path": "./tsconfig.node.json"
}
]
}
tsconfig.node.json
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{
"compilerOptions": {
"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
"target": "ES2023",
"lib": ["ES2023"],
"module": "ESNext",
"types": ["node"],
"skipLibCheck": true,
"moduleResolution": "Bundler",
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"moduleDetection": "force",
"noEmit": true,
"strict": true,
"noUnusedLocals": true,
"noUnusedParameters": true
},
"include": [
"vite.config.ts",
"playwright.config.ts",
"eslint.config.mjs",
"scripts/**/*.mjs"
]
}
vite.config.ts
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/// <reference types="vitest/config" />
import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";
export default defineConfig({
base: "./",
plugins: [react()],
test: {
environment: "jsdom",
setupFiles: "./src/test/setup.ts",
css: true,
maxWorkers: 2,
restoreMocks: true,
exclude: ["tests/browser/**", "node_modules/**", "dist/**"],
},
});