{
  "version": 3,
  "sources": ["../../../src/lib/hooks/usePeerIds.ts"],
  "sourcesContent": ["import { useAtom, useComputed, useValue } from '@tldraw/state-react'\nimport { useEffect } from 'react'\nimport {\n\tgetCollaboratorStateFromElapsedTime,\n\tshouldShowCollaborator,\n} from '../utils/collaboratorState'\nimport { uniq } from '../utils/uniq'\nimport { useEditor } from './useEditor'\n\nfunction setsEqual<T>(a: Set<T>, b: Set<T>): boolean {\n\tif (a.size !== b.size) return false\n\tfor (const item of a) {\n\t\tif (!b.has(item)) return false\n\t}\n\treturn true\n}\n\n// TODO: maybe move this to a computed property on the App class?\n/**\n * @returns The list of peer UserIDs\n * @public\n */\nexport function usePeerIds() {\n\tconst editor = useEditor()\n\n\tconst $userIds = useComputed(\n\t\t'userIds',\n\t\t() => uniq(editor.getCollaborators().map((p) => p.userId)).sort(),\n\t\t{ isEqual: (a, b) => a.join(',') === b.join?.(',') },\n\t\t[editor]\n\t)\n\n\treturn useValue($userIds)\n}\n\n/**\n * Returns a computed signal of active peer user IDs that should be shown.\n * Automatically re-evaluates on an interval to handle time-based state transitions\n * (active -> idle -> inactive).\n *\n * @returns A computed signal containing a Set of active peer user IDs\n * @internal\n */\nexport function useActivePeerIds$() {\n\tconst $time = useAtom('peerIdsTime', Date.now())\n\tconst editor = useEditor()\n\tuseEffect(() => {\n\t\tconst interval = editor.timers.setInterval(() => {\n\t\t\t$time.set(Date.now())\n\t\t}, editor.options.collaboratorCheckIntervalMs)\n\n\t\treturn () => clearInterval(interval)\n\t}, [editor, $time])\n\n\treturn useComputed(\n\t\t'activePeerIds',\n\t\t() => {\n\t\t\tconst now = $time.get()\n\t\t\treturn new Set(\n\t\t\t\teditor\n\t\t\t\t\t.getCollaborators()\n\t\t\t\t\t.filter((p) => {\n\t\t\t\t\t\tconst elapsed = Math.max(0, now - (p.lastActivityTimestamp ?? Infinity))\n\t\t\t\t\t\tconst state = getCollaboratorStateFromElapsedTime(editor, elapsed)\n\t\t\t\t\t\treturn shouldShowCollaborator(editor, p, state)\n\t\t\t\t\t})\n\t\t\t\t\t.map((p) => p.userId)\n\t\t\t)\n\t\t},\n\t\t{ isEqual: setsEqual },\n\t\t[editor]\n\t)\n}\n"],
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