@tldraw/tlschema/dist-esm/createPresenceStateDerivation.mjs.map

A tiny little drawing app (schema).

{
  "version": 3,
  "sources": ["../src/createPresenceStateDerivation.ts"],
  "sourcesContent": ["import { Signal, computed } from '@tldraw/state'\nimport { TLStore } from './TLStore'\nimport { CameraRecordType } from './records/TLCamera'\nimport { TLINSTANCE_ID } from './records/TLInstance'\nimport { InstancePageStateRecordType } from './records/TLPageState'\nimport { TLPOINTER_ID } from './records/TLPointer'\nimport { InstancePresenceRecordType, TLInstancePresence } from './records/TLPresence'\n\n/**\n * The information about a user which is used for multiplayer features.\n * @public\n */\nexport interface TLPresenceUserInfo {\n\t/**\n\t * id - A unique identifier for the user. This should be the same across all devices and sessions.\n\t */\n\tid: string\n\t/**\n\t * The user's display name.\n\t */\n\tname?: string | null\n\t/**\n\t * The user's color. If not given, a random color will be assigned.\n\t */\n\tcolor?: string | null\n}\n\n/**\n * Creates a derivation that represents the current presence state of the current user.\n * @public\n */\nexport function createPresenceStateDerivation(\n\t$user: Signal<TLPresenceUserInfo>,\n\tinstanceId?: TLInstancePresence['id']\n) {\n\treturn (store: TLStore): Signal<TLInstancePresence | null> => {\n\t\treturn computed('instancePresence', () => {\n\t\t\tconst user = $user.get()\n\t\t\tif (!user) return null\n\n\t\t\tconst state = getDefaultUserPresence(store, user)\n\t\t\tif (!state) return null\n\n\t\t\treturn InstancePresenceRecordType.create({\n\t\t\t\t...state,\n\t\t\t\tid: instanceId ?? InstancePresenceRecordType.createId(store.id),\n\t\t\t})\n\t\t})\n\t}\n}\n\n/** @public */\nexport type TLPresenceStateInfo = Parameters<(typeof InstancePresenceRecordType)['create']>[0]\n\n/** @public */\nexport function getDefaultUserPresence(store: TLStore, user: TLPresenceUserInfo) {\n\tconst instance = store.get(TLINSTANCE_ID)\n\tconst pageState = store.get(InstancePageStateRecordType.createId(instance?.currentPageId))\n\tconst camera = store.get(CameraRecordType.createId(instance?.currentPageId))\n\tconst pointer = store.get(TLPOINTER_ID)\n\tif (!pageState || !instance || !camera || !pointer) {\n\t\treturn null\n\t}\n\n\treturn {\n\t\tselectedShapeIds: pageState.selectedShapeIds,\n\t\tbrush: instance.brush,\n\t\tscribbles: instance.scribbles,\n\t\tuserId: user.id,\n\t\tuserName: user.name ?? '',\n\t\tfollowingUserId: instance.followingUserId,\n\t\tcamera: {\n\t\t\tx: camera.x,\n\t\t\ty: camera.y,\n\t\t\tz: camera.z,\n\t\t},\n\t\tcolor: user.color ?? '#FF0000',\n\t\tcurrentPageId: instance.currentPageId,\n\t\tcursor: {\n\t\t\tx: pointer.x,\n\t\t\ty: pointer.y,\n\t\t\trotation: instance.cursor.rotation,\n\t\t\ttype: instance.cursor.type,\n\t\t},\n\t\tlastActivityTimestamp: pointer.lastActivityTimestamp,\n\t\tscreenBounds: instance.screenBounds,\n\t\tchatMessage: instance.chatMessage,\n\t\tmeta: {},\n\t} satisfies TLPresenceStateInfo\n}\n"],
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