{"version":3,"file":"transport-Bf57u6ZA.mjs","names":[],"sources":["../src/client/transport.ts"],"sourcesContent":["/**\n * Transport layer for the EmDash client.\n *\n * Implements a composable interceptor pipeline that modifies requests\n * and responses. The client calls `transport.fetch(request)` — everything\n * else (auth, CSRF, retry) is handled by interceptors.\n */\n\n// Regex patterns for transport utilities\nconst COOKIE_NAME_VALUE_PATTERN = /^([^;]+)/;\n\n/**\n * An interceptor can modify the request, call next(), inspect\n * the response, and optionally retry.\n */\nexport type Interceptor = (\n\trequest: Request,\n\tnext: (request: Request) => Promise<Response>,\n) => Promise<Response>;\n\nexport interface TransportOptions {\n\tinterceptors?: Interceptor[];\n}\n\nfunction baseFetch(request: Request): Promise<Response> {\n\treturn globalThis.fetch(request);\n}\n\n/**\n * Creates a fetch function that runs requests through an interceptor pipeline.\n */\nexport function createTransport(options: TransportOptions = {}): {\n\tfetch: (request: Request) => Promise<Response>;\n} {\n\tconst interceptors = options.interceptors ?? [];\n\n\t// Build the chain once — interceptors don't change after construction\n\tlet chain: (request: Request) => Promise<Response> = baseFetch;\n\tfor (let i = interceptors.length - 1; i >= 0; i--) {\n\t\tconst interceptor = interceptors[i];\n\t\tconst next = chain;\n\t\tchain = (req) => interceptor(req, next);\n\t}\n\n\treturn { fetch: chain };\n}\n\n// ---------------------------------------------------------------------------\n// Built-in interceptors\n// ---------------------------------------------------------------------------\n\n/**\n * Adds X-EmDash-Request: 1 and Origin headers to mutation requests\n * (POST, PUT, DELETE). The custom header satisfies EmDash's CSRF check;\n * the Origin header satisfies Astro's built-in origin verification which\n * rejects server-side POST requests that lack a matching Origin.\n */\nexport function csrfInterceptor(): Interceptor {\n\tconst MUTATION_METHODS = new Set([\"POST\", \"PUT\", \"DELETE\", \"PATCH\"]);\n\n\treturn (request, next) => {\n\t\tif (MUTATION_METHODS.has(request.method)) {\n\t\t\tconst headers = new Headers(request.headers);\n\t\t\theaders.set(\"X-EmDash-Request\", \"1\");\n\t\t\tif (!headers.has(\"Origin\")) {\n\t\t\t\tconst url = new URL(request.url);\n\t\t\t\theaders.set(\"Origin\", url.origin);\n\t\t\t}\n\t\t\treturn next(new Request(request, { headers }));\n\t\t}\n\t\treturn next(request);\n\t};\n}\n\n/**\n * Adds Authorization: Bearer header from a static token.\n */\nexport function tokenInterceptor(token: string): Interceptor {\n\treturn (request, next) => {\n\t\tconst headers = new Headers(request.headers);\n\t\theaders.set(\"Authorization\", `Bearer ${token}`);\n\t\treturn next(new Request(request, { headers }));\n\t};\n}\n\n/**\n * Dev bypass interceptor. Calls the dev-bypass endpoint on first request\n * to establish a session, then forwards the session cookie on subsequent\n * requests.\n */\nexport function devBypassInterceptor(baseUrl: string): Interceptor {\n\tlet sessionCookie: string | null = null;\n\tlet initializing: Promise<void> | null = null;\n\n\tasync function init(): Promise<void> {\n\t\tconst bypassUrl = new URL(\"/_emdash/api/auth/dev-bypass\", baseUrl);\n\t\tconst res = await globalThis.fetch(bypassUrl, { redirect: \"manual\" });\n\n\t\t// Extract session cookie from Set-Cookie header\n\t\tconst setCookie = res.headers.get(\"set-cookie\");\n\t\tif (setCookie) {\n\t\t\t// Extract just the cookie name=value part\n\t\t\tconst match = setCookie.match(COOKIE_NAME_VALUE_PATTERN);\n\t\t\tif (match) {\n\t\t\t\tsessionCookie = match[1]!;\n\t\t\t}\n\t\t}\n\n\t\t// Consume the response body\n\t\tif (res.body) {\n\t\t\tawait res.text().catch(() => {});\n\t\t}\n\t}\n\n\treturn async (request, next) => {\n\t\t// Ensure we've initialized (only once, even with concurrent requests)\n\t\tif (!sessionCookie) {\n\t\t\tif (!initializing) {\n\t\t\t\tinitializing = init();\n\t\t\t}\n\t\t\tawait initializing;\n\t\t}\n\n\t\tif (sessionCookie) {\n\t\t\tconst headers = new Headers(request.headers);\n\t\t\tconst existing = headers.get(\"cookie\");\n\t\t\theaders.set(\"cookie\", existing ? `${existing}; ${sessionCookie}` : sessionCookie);\n\t\t\treturn next(new Request(request, { headers }));\n\t\t}\n\n\t\treturn next(request);\n\t};\n}\n\n/**\n * Auto-refreshes expired OAuth tokens on 401 responses.\n * Requires a refresh token and the token endpoint URL.\n */\nexport function refreshInterceptor(options: {\n\trefreshToken: string;\n\ttokenEndpoint: string;\n\tonTokenRefreshed?: (accessToken: string, refreshToken: string, expiresAt: string) => void;\n}): Interceptor {\n\tlet refreshing: Promise<string | null> | null = null;\n\n\tasync function refresh(): Promise<string | null> {\n\t\tconst res = await globalThis.fetch(options.tokenEndpoint, {\n\t\t\tmethod: \"POST\",\n\t\t\theaders: { \"Content-Type\": \"application/json\" },\n\t\t\tbody: JSON.stringify({\n\t\t\t\tgrant_type: \"refresh_token\",\n\t\t\t\trefresh_token: options.refreshToken,\n\t\t\t}),\n\t\t});\n\n\t\tif (!res.ok) return null;\n\n\t\tinterface TokenFields {\n\t\t\taccess_token: string;\n\t\t\trefresh_token?: string;\n\t\t\texpires_in?: number;\n\t\t}\n\n\t\tconst json = (await res.json()) as Record<string, unknown>;\n\n\t\t// The token endpoint wraps the response in { success, data: ... } via apiSuccess.\n\t\t// Handle both wrapped and bare shapes for robustness.\n\t\tconst tokenData: TokenFields =\n\t\t\tjson.data && typeof json.data === \"object\" && \"access_token\" in json.data\n\t\t\t\t? (json.data as TokenFields)\n\t\t\t\t: (json as unknown as TokenFields);\n\n\t\tconst expiresAt = tokenData.expires_in\n\t\t\t? new Date(Date.now() + tokenData.expires_in * 1000).toISOString()\n\t\t\t: new Date(Date.now() + 3600_000).toISOString();\n\n\t\tif (options.onTokenRefreshed) {\n\t\t\toptions.onTokenRefreshed(\n\t\t\t\ttokenData.access_token,\n\t\t\t\ttokenData.refresh_token ?? options.refreshToken,\n\t\t\t\texpiresAt,\n\t\t\t);\n\t\t}\n\n\t\treturn tokenData.access_token;\n\t}\n\n\treturn async (request, next) => {\n\t\t// A request body can only be read once; clone before sending so the\n\t\t// 401 retry has an unconsumed request to rebuild from.\n\t\tconst retryTemplate = request.body ? request.clone() : request;\n\n\t\tconst response = await next(request);\n\n\t\tif (response.status === 401) {\n\t\t\t// Try to refresh\n\t\t\tif (!refreshing) {\n\t\t\t\trefreshing = refresh().finally(() => {\n\t\t\t\t\trefreshing = null;\n\t\t\t\t});\n\t\t\t}\n\n\t\t\tconst newToken = await refreshing;\n\t\t\tif (newToken) {\n\t\t\t\t// Retry with new token\n\t\t\t\tconst headers = new Headers(retryTemplate.headers);\n\t\t\t\theaders.set(\"Authorization\", `Bearer ${newToken}`);\n\t\t\t\treturn next(new Request(retryTemplate, { headers }));\n\t\t\t}\n\t\t}\n\n\t\treturn response;\n\t};\n}\n"],"mappings":";;;;;;;;AASA,MAAM,4BAA4B;AAelC,SAAS,UAAU,SAAqC;AACvD,QAAO,WAAW,MAAM,QAAQ;;;;;AAMjC,SAAgB,gBAAgB,UAA4B,EAAE,EAE5D;CACD,MAAM,eAAe,QAAQ,gBAAgB,EAAE;CAG/C,IAAI,QAAiD;AACrD,MAAK,IAAI,IAAI,aAAa,SAAS,GAAG,KAAK,GAAG,KAAK;EAClD,MAAM,cAAc,aAAa;EACjC,MAAM,OAAO;AACb,WAAS,QAAQ,YAAY,KAAK,KAAK;;AAGxC,QAAO,EAAE,OAAO,OAAO;;;;;;;;AAaxB,SAAgB,kBAA+B;CAC9C,MAAM,mBAAmB,IAAI,IAAI;EAAC;EAAQ;EAAO;EAAU;EAAQ,CAAC;AAEpE,SAAQ,SAAS,SAAS;AACzB,MAAI,iBAAiB,IAAI,QAAQ,OAAO,EAAE;GACzC,MAAM,UAAU,IAAI,QAAQ,QAAQ,QAAQ;AAC5C,WAAQ,IAAI,oBAAoB,IAAI;AACpC,OAAI,CAAC,QAAQ,IAAI,SAAS,EAAE;IAC3B,MAAM,MAAM,IAAI,IAAI,QAAQ,IAAI;AAChC,YAAQ,IAAI,UAAU,IAAI,OAAO;;AAElC,UAAO,KAAK,IAAI,QAAQ,SAAS,EAAE,SAAS,CAAC,CAAC;;AAE/C,SAAO,KAAK,QAAQ;;;;;;AAOtB,SAAgB,iBAAiB,OAA4B;AAC5D,SAAQ,SAAS,SAAS;EACzB,MAAM,UAAU,IAAI,QAAQ,QAAQ,QAAQ;AAC5C,UAAQ,IAAI,iBAAiB,UAAU,QAAQ;AAC/C,SAAO,KAAK,IAAI,QAAQ,SAAS,EAAE,SAAS,CAAC,CAAC;;;;;;;;AAShD,SAAgB,qBAAqB,SAA8B;CAClE,IAAI,gBAA+B;CACnC,IAAI,eAAqC;CAEzC,eAAe,OAAsB;EACpC,MAAM,YAAY,IAAI,IAAI,gCAAgC,QAAQ;EAClE,MAAM,MAAM,MAAM,WAAW,MAAM,WAAW,EAAE,UAAU,UAAU,CAAC;EAGrE,MAAM,YAAY,IAAI,QAAQ,IAAI,aAAa;AAC/C,MAAI,WAAW;GAEd,MAAM,QAAQ,UAAU,MAAM,0BAA0B;AACxD,OAAI,MACH,iBAAgB,MAAM;;AAKxB,MAAI,IAAI,KACP,OAAM,IAAI,MAAM,CAAC,YAAY,GAAG;;AAIlC,QAAO,OAAO,SAAS,SAAS;AAE/B,MAAI,CAAC,eAAe;AACnB,OAAI,CAAC,aACJ,gBAAe,MAAM;AAEtB,SAAM;;AAGP,MAAI,eAAe;GAClB,MAAM,UAAU,IAAI,QAAQ,QAAQ,QAAQ;GAC5C,MAAM,WAAW,QAAQ,IAAI,SAAS;AACtC,WAAQ,IAAI,UAAU,WAAW,GAAG,SAAS,IAAI,kBAAkB,cAAc;AACjF,UAAO,KAAK,IAAI,QAAQ,SAAS,EAAE,SAAS,CAAC,CAAC;;AAG/C,SAAO,KAAK,QAAQ;;;;;;;AAQtB,SAAgB,mBAAmB,SAInB;CACf,IAAI,aAA4C;CAEhD,eAAe,UAAkC;EAChD,MAAM,MAAM,MAAM,WAAW,MAAM,QAAQ,eAAe;GACzD,QAAQ;GACR,SAAS,EAAE,gBAAgB,oBAAoB;GAC/C,MAAM,KAAK,UAAU;IACpB,YAAY;IACZ,eAAe,QAAQ;IACvB,CAAC;GACF,CAAC;AAEF,MAAI,CAAC,IAAI,GAAI,QAAO;EAQpB,MAAM,OAAQ,MAAM,IAAI,MAAM;EAI9B,MAAM,YACL,KAAK,QAAQ,OAAO,KAAK,SAAS,YAAY,kBAAkB,KAAK,OACjE,KAAK,OACL;EAEL,MAAM,YAAY,UAAU,aACzB,IAAI,KAAK,KAAK,KAAK,GAAG,UAAU,aAAa,IAAK,CAAC,aAAa,GAChE,IAAI,KAAK,KAAK,KAAK,GAAG,KAAS,CAAC,aAAa;AAEhD,MAAI,QAAQ,iBACX,SAAQ,iBACP,UAAU,cACV,UAAU,iBAAiB,QAAQ,cACnC,UACA;AAGF,SAAO,UAAU;;AAGlB,QAAO,OAAO,SAAS,SAAS;EAG/B,MAAM,gBAAgB,QAAQ,OAAO,QAAQ,OAAO,GAAG;EAEvD,MAAM,WAAW,MAAM,KAAK,QAAQ;AAEpC,MAAI,SAAS,WAAW,KAAK;AAE5B,OAAI,CAAC,WACJ,cAAa,SAAS,CAAC,cAAc;AACpC,iBAAa;KACZ;GAGH,MAAM,WAAW,MAAM;AACvB,OAAI,UAAU;IAEb,MAAM,UAAU,IAAI,QAAQ,cAAc,QAAQ;AAClD,YAAQ,IAAI,iBAAiB,UAAU,WAAW;AAClD,WAAO,KAAK,IAAI,QAAQ,eAAe,EAAE,SAAS,CAAC,CAAC;;;AAItD,SAAO"}