feat(scheduling-webui): model invitation actions

webui/src/features/scheduling/schedulingViewModel.ts

@@ -42,6 +42,20 @@ export type SchedulingSortPhase =
   | "determined"
   | "past";
 
+export type SchedulingInvitationActionBlock =
+  | "participation_policy_unavailable"
+  | "cancellation_notice_expired"
+  | "delivery_unavailable"
+  | "no_delivery_target"
+  | "no_active_invitation"
+  | "participant_revision_unavailable";
+
+export type SchedulingInvitationActionBlocks = {
+  copy: SchedulingInvitationActionBlock | null;
+  send: SchedulingInvitationActionBlock | null;
+  revoke: SchedulingInvitationActionBlock | null;
+};
+
 type DirectorySelection = {
   selection_key?: string;
   kind?: PeoplePickerItem["kind"];
@@ -268,6 +282,65 @@ export function schedulingRequestIsPast(
   return slotEnds.every((value) => Number.isFinite(value) && value < now.getTime());
 }
 
+export function schedulingInvitationActionBlocks(
+  request: SchedulingRequest,
+  participant: SchedulingParticipant,
+  now = new Date()
+): SchedulingInvitationActionBlocks {
+  if (!participant.revision) {
+    return {
+      copy: "participant_revision_unavailable",
+      send: "participant_revision_unavailable",
+      revoke: "participant_revision_unavailable"
+    };
+  }
+  const policyAvailable = Boolean(
+    request.poll_id &&
+    request.public_participation_policy_enforcement_available === true
+  );
+  let issueBlock: SchedulingInvitationActionBlock | null = policyAvailable
+    ? null
+    : "participation_policy_unavailable";
+  if (!issueBlock && request.status === "cancelled") {
+    const noticeUntil = request.cancellation_notice_until
+      ? Date.parse(request.cancellation_notice_until)
+      : Number.NaN;
+    if (!Number.isFinite(noticeUntil) || noticeUntil <= now.getTime()) {
+      issueBlock = "cancellation_notice_expired";
+    }
+  }
+
+  const respondentId = participant.respondent_id?.trim() ?? "";
+  const hasDeliveryTarget = Boolean(
+    participant.email?.trim() ||
+    (respondentId && !respondentId.startsWith("scheduling-participant:"))
+  );
+  const sendBlock = issueBlock
+    ?? (request.participant_invitation_delivery_available === true
+      ? null
+      : "delivery_unavailable")
+    ?? (hasDeliveryTarget ? null : "no_delivery_target");
+  const revokeBlock = participant.poll_invitation_id
+    ? (policyAvailable ? null : "participation_policy_unavailable")
+    : "no_active_invitation";
+
+  return { copy: issueBlock, send: sendBlock, revoke: revokeBlock };
+}
+
+export function schedulingPublicInvitationUrl(
+  actionUrl: string,
+  applicationOrigin: string
+): string | null {
+  try {
+    const origin = new URL(applicationOrigin);
+    const url = new URL(actionUrl, origin);
+    if (url.origin !== origin.origin || !url.pathname.startsWith("/scheduling/public/")) return null;
+    return url.toString();
+  } catch {
+    return null;
+  }
+}
+
 export function applySchedulingAvailabilityChoice(
   slotIds: string[],
   current: Record<string, SchedulingAvailabilityValue | "">,