feat(campaign-ui): review and link managed attachments

webui/src/features/campaigns/utils/attachmentPreview.ts

@@ -0,0 +1,53 @@
+export type AttachmentPreviewFileLike = {
+  id: string;
+  display_path: string;
+  filename: string;
+  linked_to_campaign?: boolean;
+};
+
+export type AttachmentPreviewLike<T extends AttachmentPreviewFileLike> = {
+  rules: Array<{matches: T[]}>;
+  linkable_files?: T[];
+};
+
+export function attachmentPreviewMatchedFiles<T extends AttachmentPreviewFileLike>(
+  preview: AttachmentPreviewLike<T> | null
+): T[] {
+  if (!preview) return [];
+  const byId = new Map<string, T>();
+  for (const rule of preview.rules) {
+    for (const file of rule.matches) {
+      const key = file.id || file.display_path;
+      if (!key) continue;
+      const existing = byId.get(key);
+      if (existing) {
+        byId.set(key, {
+          ...existing,
+          linked_to_campaign: existing.linked_to_campaign !== false || file.linked_to_campaign !== false
+        });
+      } else {
+        byId.set(key, file);
+      }
+    }
+  }
+  return [...byId.values()].sort((left, right) => {
+    const linkOrder = Number(left.linked_to_campaign === false) - Number(right.linked_to_campaign === false);
+    if (linkOrder !== 0) return linkOrder;
+    return (left.display_path || left.filename).localeCompare(right.display_path || right.filename);
+  });
+}
+
+export function attachmentPreviewLinkableFiles<T extends AttachmentPreviewFileLike>(
+  preview: AttachmentPreviewLike<T> | null
+): T[] {
+  if (!preview) return [];
+  const source = preview.linkable_files && preview.linkable_files.length > 0
+    ? preview.linkable_files
+    : attachmentPreviewMatchedFiles(preview).filter((file) => file.linked_to_campaign === false);
+  const byId = new Map<string, T>();
+  for (const file of source) {
+    const key = file.id || file.display_path;
+    if (key) byId.set(key, file);
+  }
+  return [...byId.values()];
+}