{"version":3,"file":"session-refresh.mjs","names":[],"sources":["../../src/client/session-refresh.ts"],"sourcesContent":["import type { BetterAuthClientOptions } from \"@better-auth/core\";\nimport type { BetterFetch } from \"@better-fetch/fetch\";\nimport type { WritableAtom } from \"nanostores\";\nimport type { Session, User } from \"../types\";\nimport { getGlobalBroadcastChannel } from \"./broadcast-channel\";\nimport { getGlobalFocusManager } from \"./focus-manager\";\nimport { getGlobalOnlineManager } from \"./online-manager\";\nimport type { AuthQueryAtom } from \"./query\";\n\nconst now = () => Math.floor(Date.now() / 1000);\n\n/**\n * Normalize $fetch response: `throw: true` returns data directly, otherwise `{ data, error }`.\n */\nfunction normalizeSessionResponse(res: unknown): {\n\tdata: SessionResponse | null;\n\terror: unknown;\n} {\n\tif (\n\t\ttypeof res === \"object\" &&\n\t\tres !== null &&\n\t\t\"data\" in res &&\n\t\t\"error\" in res\n\t) {\n\t\treturn res as { data: SessionResponse | null; error: unknown };\n\t}\n\treturn { data: res as SessionResponse, error: null };\n}\n\n/**\n * Rate limit: don't refetch on focus if a session request was made within this many seconds\n */\nconst FOCUS_REFETCH_RATE_LIMIT_SECONDS = 5;\n\nexport interface SessionRefreshOptions {\n\tsessionAtom: AuthQueryAtom<\n\t\t{\n\t\t\tuser: User;\n\t\t\tsession: Session;\n\t\t} & Record<string, any>\n\t>;\n\tsessionSignal: WritableAtom<boolean>;\n\t$fetch: BetterFetch;\n\toptions?: BetterAuthClientOptions | undefined;\n}\n\ninterface SessionRefreshState {\n\tlastSync: number;\n\tlastSessionRequest: number;\n\tcachedSession: any;\n\tpollInterval?: ReturnType<typeof setInterval> | undefined;\n\tunsubscribeBroadcast?: (() => void) | undefined;\n\tunsubscribeFocus?: (() => void) | undefined;\n\tunsubscribeOnline?: (() => void) | undefined;\n}\n\nexport type SessionResponse = (\n\t| {\n\t\t\tsession: null;\n\t\t\tuser: null;\n\t\t\tneedsRefresh?: boolean;\n\t  }\n\t| {\n\t\t\tsession: Session;\n\t\t\tuser: User;\n\t\t\tneedsRefresh?: boolean;\n\t  }\n) &\n\tRecord<string, any>;\n\nexport function createSessionRefreshManager(opts: SessionRefreshOptions) {\n\tconst { sessionAtom, sessionSignal, $fetch, options = {} } = opts;\n\n\tconst refetchInterval = options.sessionOptions?.refetchInterval ?? 0;\n\tconst refetchOnWindowFocus =\n\t\toptions.sessionOptions?.refetchOnWindowFocus ?? true;\n\tconst refetchWhenOffline =\n\t\toptions.sessionOptions?.refetchWhenOffline ?? false;\n\n\tconst state: SessionRefreshState = {\n\t\tlastSync: 0,\n\t\tlastSessionRequest: 0,\n\t\tcachedSession: undefined,\n\t};\n\n\tconst shouldRefetch = (): boolean => {\n\t\treturn refetchWhenOffline || getGlobalOnlineManager().isOnline;\n\t};\n\n\tconst triggerRefetch = (\n\t\tevent?:\n\t\t\t| {\n\t\t\t\t\tevent?: \"poll\" | \"visibilitychange\" | \"storage\";\n\t\t\t  }\n\t\t\t| undefined,\n\t) => {\n\t\tif (!shouldRefetch()) return;\n\n\t\tif (event?.event === \"storage\") {\n\t\t\tstate.lastSync = now();\n\t\t\tsessionSignal.set(!sessionSignal.get());\n\t\t\treturn;\n\t\t}\n\n\t\tconst currentSession = sessionAtom.get();\n\n\t\tconst fetchSessionWithRefresh = () => {\n\t\t\tstate.lastSessionRequest = now();\n\t\t\t$fetch<SessionResponse>(\"/get-session\")\n\t\t\t\t.then(async (res) => {\n\t\t\t\t\tlet { data, error } = normalizeSessionResponse(res);\n\n\t\t\t\t\tif (data?.needsRefresh) {\n\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\tconst refreshRes = await $fetch<SessionResponse>(\"/get-session\", {\n\t\t\t\t\t\t\t\tmethod: \"POST\",\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\t({ data, error } = normalizeSessionResponse(refreshRes));\n\t\t\t\t\t\t} catch {}\n\t\t\t\t\t}\n\n\t\t\t\t\tconst sessionData = data?.session && data?.user ? data : null;\n\n\t\t\t\t\tsessionAtom.set({\n\t\t\t\t\t\t...currentSession,\n\t\t\t\t\t\tdata: sessionData,\n\t\t\t\t\t\terror: error as Parameters<typeof sessionAtom.set>[0][\"error\"],\n\t\t\t\t\t});\n\t\t\t\t\tstate.lastSync = now();\n\t\t\t\t\tsessionSignal.set(!sessionSignal.get());\n\t\t\t\t})\n\t\t\t\t.catch(() => {});\n\t\t};\n\n\t\tif (event?.event === \"poll\") {\n\t\t\tfetchSessionWithRefresh();\n\t\t\treturn;\n\t\t}\n\n\t\t// Rate limit: don't refetch on focus if a session request was made recently\n\t\tif (event?.event === \"visibilitychange\") {\n\t\t\tconst timeSinceLastRequest = now() - state.lastSessionRequest;\n\t\t\tif (timeSinceLastRequest < FOCUS_REFETCH_RATE_LIMIT_SECONDS) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tstate.lastSessionRequest = now();\n\t\t}\n\n\t\tif (event?.event === \"visibilitychange\") {\n\t\t\tfetchSessionWithRefresh();\n\t\t\treturn;\n\t\t}\n\n\t\tif (currentSession?.data === null || currentSession?.data === undefined) {\n\t\t\tstate.lastSync = now();\n\t\t\tsessionSignal.set(!sessionSignal.get());\n\t\t}\n\t};\n\n\tconst broadcastSessionUpdate = (\n\t\ttrigger: \"signout\" | \"getSession\" | \"updateUser\",\n\t) => {\n\t\tgetGlobalBroadcastChannel().post({\n\t\t\tevent: \"session\",\n\t\t\tdata: { trigger },\n\t\t\tclientId: Math.random().toString(36).substring(7),\n\t\t});\n\t};\n\n\tconst setupPolling = () => {\n\t\tif (refetchInterval && refetchInterval > 0) {\n\t\t\tstate.pollInterval = setInterval(() => {\n\t\t\t\tconst currentSession = sessionAtom.get();\n\t\t\t\tif (currentSession?.data) {\n\t\t\t\t\ttriggerRefetch({ event: \"poll\" });\n\t\t\t\t}\n\t\t\t}, refetchInterval * 1000);\n\t\t}\n\t};\n\n\tconst setupBroadcast = () => {\n\t\tstate.unsubscribeBroadcast = getGlobalBroadcastChannel().subscribe(() => {\n\t\t\ttriggerRefetch({ event: \"storage\" });\n\t\t});\n\t};\n\n\tconst setupFocusRefetch = () => {\n\t\tif (!refetchOnWindowFocus) return;\n\n\t\tstate.unsubscribeFocus = getGlobalFocusManager().subscribe(() => {\n\t\t\ttriggerRefetch({ event: \"visibilitychange\" });\n\t\t});\n\t};\n\n\tconst setupOnlineRefetch = () => {\n\t\tstate.unsubscribeOnline = getGlobalOnlineManager().subscribe((online) => {\n\t\t\tif (online) {\n\t\t\t\ttriggerRefetch({ event: \"visibilitychange\" });\n\t\t\t}\n\t\t});\n\t};\n\n\tconst init = () => {\n\t\tsetupPolling();\n\t\tsetupBroadcast();\n\t\tsetupFocusRefetch();\n\t\tsetupOnlineRefetch();\n\n\t\tgetGlobalBroadcastChannel().setup();\n\t\tgetGlobalFocusManager().setup();\n\t\tgetGlobalOnlineManager().setup();\n\t};\n\n\tconst cleanup = () => {\n\t\tif (state.pollInterval) {\n\t\t\tclearInterval(state.pollInterval);\n\t\t\tstate.pollInterval = undefined;\n\t\t}\n\t\tif (state.unsubscribeBroadcast) {\n\t\t\tstate.unsubscribeBroadcast();\n\t\t\tstate.unsubscribeBroadcast = undefined;\n\t\t}\n\t\tif (state.unsubscribeFocus) {\n\t\t\tstate.unsubscribeFocus();\n\t\t\tstate.unsubscribeFocus = undefined;\n\t\t}\n\t\tif (state.unsubscribeOnline) {\n\t\t\tstate.unsubscribeOnline();\n\t\t\tstate.unsubscribeOnline = undefined;\n\t\t}\n\t\tstate.lastSync = 0;\n\t\tstate.lastSessionRequest = 0;\n\t\tstate.cachedSession = undefined;\n\t};\n\n\treturn 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