xref: /expo/packages/expo-updates/build/statemachine/UpdatesStateMachine.js.map (revision 033ea1fc)

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{ createMachine, assign } from 'xstate';\n\nexport enum UpdatesStateMachineEventTypes {\n  CHECK = 'check',\n  CHECK_COMPLETE_AVAILABLE = 'checkCompleteAvailable',\n  CHECK_COMPLETE_UNAVAILABLE = 'checkCompleteUnavailable',\n  CHECK_ERROR = 'checkError',\n  DOWNLOAD = 'download',\n  DOWNLOAD_COMPLETE = 'downloadComplete',\n  DOWNLOAD_ERROR = 'downloadError',\n  RESTART = 'restart',\n}\n\n/**\n * Simplified model for an update manifest\n */\nexport type Manifest = {\n  updateId: string;\n};\n\n/**\n * Model for an update event\n */\nexport type UpdatesStateMachineEvent = {\n  type: UpdatesStateMachineEventTypes;\n  body: {\n    message?: string;\n    manifest?: Manifest;\n    isRollBackToEmbedded?: boolean;\n  };\n};\n\n/**\n * The context structure (analogous to what is exposed in @expo/use-updates)\n */\nexport interface UpdatesStateMachineContext {\n  isUpdateAvailable: boolean;\n  isUpdatePending: boolean;\n  latestManifest?: Manifest;\n  isChecking: boolean;\n  isDownloading: boolean;\n  isRollback: boolean;\n  downloadedManifest?: Manifest;\n  checkError?: Error;\n  downloadError?: Error;\n}\n\n/**\n * Actions that modify the context\n */\nconst checkCompleteAvailableAction = assign({\n  latestManifest: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    event.body?.manifest || undefined,\n  checkError: () => undefined,\n  isChecking: () => false,\n  isUpdateAvailable: () => true,\n  isRollback: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    Boolean(event.body?.isRollBackToEmbedded),\n});\n\nconst checkCompleteUnavailableAction = assign({\n  latestManifest: () => undefined,\n  checkError: () => undefined,\n  isChecking: () => false,\n  isUpdateAvailable: () => false,\n  isRollback: () => false,\n});\n\nconst checkErrorAction = assign({\n  isChecking: () => false,\n  checkError: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    new Error(event.body?.message || 'checkError'),\n});\n\nconst downloadCompleteAction = assign({\n  downloadedManifest: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    event.body?.manifest || context.downloadedManifest,\n  latestManifest: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    event.body?.manifest || context.latestManifest,\n  downloadError: () => undefined,\n  isDownloading: () => false,\n  isUpdatePending: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    !!(event.body?.manifest || context.downloadedManifest),\n  isUpdateAvailable: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    event.body?.manifest !== undefined || context.isUpdateAvailable,\n});\n\nconst downloadErrorAction = assign({\n  downloadError: (context: UpdatesStateMachineContext, event: UpdatesStateMachineEvent) =>\n    new Error(event.body?.message || 'downloadError'),\n  isDownloading: () => false,\n});\n\nconst check = assign({\n  isChecking: (context: UpdatesStateMachineContext) => true,\n});\n\nconst download = assign({\n  isDownloading: (context: UpdatesStateMachineContext) => true,\n});\n\n/**\n * Model of the expo-updates state machine, written in Typescript.\n * The actual implementations of this state machine will be in Swift on iOS and Kotlin on Android.\n */\nexport const UpdatesStateMachine = createMachine<UpdatesStateMachineContext>({\n  id: 'Updates',\n  initial: 'idle',\n  context: {\n    isChecking: false,\n    isDownloading: false,\n    isUpdateAvailable: false,\n    isUpdatePending: false,\n    isRollback: false,\n  },\n  predictableActionArguments: true,\n  states: {\n    idle: {\n      on: {\n        check: {\n          target: 'checking',\n          actions: check,\n        },\n        download: {\n          target: 'downloading',\n          actions: download,\n        },\n        restart: {\n          target: 'restarting',\n        },\n      },\n    },\n    checking: {\n      on: {\n        checkCompleteAvailable: {\n          target: 'idle',\n          actions: [checkCompleteAvailableAction],\n        },\n        checkCompleteUnavailable: {\n          target: 'idle',\n          actions: [checkCompleteUnavailableAction],\n        },\n        checkError: {\n          target: 'idle',\n          actions: [checkErrorAction],\n        },\n      },\n    },\n    downloading: {\n      on: {\n        downloadComplete: {\n          target: 'idle',\n          actions: [downloadCompleteAction],\n        },\n        downloadError: {\n          target: 'idle',\n          actions: [downloadErrorAction],\n        },\n      },\n    },\n    restarting: {\n      type: 'final',\n    },\n  },\n});\n"]}