{"version":3,"file":"proxy.d.ts","sourceRoot":"","sources":["../src/proxy.ts"],"names":[],"mappings":"AAAA;;;GAGG;AAGH,OAAO,EACN,KAAK,gBAAgB,EACrB,KAAK,qBAAqB,EAC1B,KAAK,OAAO,EACZ,WAAW,EACX,KAAK,KAAK,EAEV,KAAK,mBAAmB,EACxB,KAAK,UAAU,EAEf,MAAM,uBAAuB,CAAC;AAG/B,cAAM,uBAAwB,SAAQ,WAAW,CAAC,qBAAqB,EAAE,gBAAgB,CAAC;IACzF,cASC;CACD;AAED;;GAEG;AACH,MAAM,MAAM,0BAA0B,GACnC;IAAE,IAAI,EAAE,OAAO,CAAA;CAAE,GACjB;IAAE,IAAI,EAAE,YAAY,CAAC;IAAC,YAAY,EAAE,MAAM,CAAA;CAAE,GAC5C;IAAE,IAAI,EAAE,YAAY,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,KAAK,EAAE,MAAM,CAAA;CAAE,GAC3D;IAAE,IAAI,EAAE,UAAU,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,gBAAgB,CAAC,EAAE,MAAM,CAAA;CAAE,GACrE;IAAE,IAAI,EAAE,gBAAgB,CAAC;IAAC,YAAY,EAAE,MAAM,CAAA;CAAE,GAChD;IAAE,IAAI,EAAE,gBAAgB,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,KAAK,EAAE,MAAM,CAAA;CAAE,GAC/D;IAAE,IAAI,EAAE,cAAc,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,gBAAgB,CAAC,EAAE,MAAM,CAAA;CAAE,GACzE;IAAE,IAAI,EAAE,gBAAgB,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,EAAE,EAAE,MAAM,CAAC;IAAC,QAAQ,EAAE,MAAM,CAAA;CAAE,GAC9E;IAAE,IAAI,EAAE,gBAAgB,CAAC;IAAC,YAAY,EAAE,MAAM,CAAC;IAAC,KAAK,EAAE,MAAM,CAAA;CAAE,GAC/D;IAAE,IAAI,EAAE,cAAc,CAAC;IAAC,YAAY,EAAE,MAAM,CAAA;CAAE,GAC9C;IACA,IAAI,EAAE,MAAM,CAAC;IACb,MAAM,EAAE,OAAO,CAAC,UAAU,EAAE,MAAM,GAAG,QAAQ,GAAG,SAAS,CAAC,CAAC;IAC3D,KAAK,EAAE,gBAAgB,CAAC,OAAO,CAAC,CAAC;CAChC,GACD;IACA,IAAI,EAAE,OAAO,CAAC;IACd,MAAM,EAAE,OAAO,CAAC,UAAU,EAAE,SAAS,GAAG,OAAO,CAAC,CAAC;IACjD,YAAY,CAAC,EAAE,MAAM,CAAC;IACtB,KAAK,EAAE,gBAAgB,CAAC,OAAO,CAAC,CAAC;CAChC,CAAC;AAEL,KAAK,8BAA8B,GAAG,IAAI,CACzC,mBAAmB,EACjB,aAAa,GACb,WAAW,GACX,WAAW,GACX,gBAAgB,GAChB,WAAW,GACX,SAAS,GACT,UAAU,GACV,WAAW,GACX,iBAAiB,GACjB,iBAAiB,CACnB,CAAC;AAEF,MAAM,WAAW,kBAAmB,SAAQ,8BAA8B;IACzE,+CAA+C;IAC/C,MAAM,CAAC,EAAE,WAAW,CAAC;IACrB,sCAAsC;IACtC,SAAS,EAAE,MAAM,CAAC;IAClB,2DAA2D;IAC3D,QAAQ,EAAE,MAAM,CAAC;CACjB;AAoCD,wBAAgB,WAAW,CAAC,KAAK,EAAE,KAAK,CAAC,GAAG,CAAC,EAAE,OAAO,EAAE,OAAO,EAAE,OAAO,EAAE,kBAAkB,GAAG,uBAAuB,CAqHrH","sourcesContent":["/**\n * Proxy stream function for apps that route LLM calls through a server.\n * The server manages auth and proxies requests to LLM providers.\n */\n\n// Internal import for JSON parsing utility\nimport {\n\ttype AssistantMessage,\n\ttype AssistantMessageEvent,\n\ttype Context,\n\tEventStream,\n\ttype Model,\n\tparseStreamingJson,\n\ttype SimpleStreamOptions,\n\ttype StopReason,\n\ttype ToolCall,\n} from \"@earendil-works/pi-ai\";\n\n// Create stream class matching ProxyMessageEventStream\nclass ProxyMessageEventStream extends EventStream<AssistantMessageEvent, AssistantMessage> {\n\tconstructor() {\n\t\tsuper(\n\t\t\t(event) => event.type === \"done\" || event.type === \"error\",\n\t\t\t(event) => {\n\t\t\t\tif (event.type === \"done\") return event.message;\n\t\t\t\tif (event.type === \"error\") return event.error;\n\t\t\t\tthrow new Error(\"Unexpected event type\");\n\t\t\t},\n\t\t);\n\t}\n}\n\n/**\n * Proxy event types - server sends these with partial field stripped to reduce bandwidth.\n */\nexport type ProxyAssistantMessageEvent =\n\t| { type: \"start\" }\n\t| { type: \"text_start\"; contentIndex: number }\n\t| { type: \"text_delta\"; contentIndex: number; delta: string }\n\t| { type: \"text_end\"; contentIndex: number; contentSignature?: string }\n\t| { type: \"thinking_start\"; contentIndex: number }\n\t| { type: \"thinking_delta\"; contentIndex: number; delta: string }\n\t| { type: \"thinking_end\"; contentIndex: number; contentSignature?: string }\n\t| { type: \"toolcall_start\"; contentIndex: number; id: string; toolName: string }\n\t| { type: \"toolcall_delta\"; contentIndex: number; delta: string }\n\t| { type: \"toolcall_end\"; contentIndex: number }\n\t| {\n\t\t\ttype: \"done\";\n\t\t\treason: Extract<StopReason, \"stop\" | \"length\" | \"toolUse\">;\n\t\t\tusage: AssistantMessage[\"usage\"];\n\t  }\n\t| {\n\t\t\ttype: \"error\";\n\t\t\treason: Extract<StopReason, \"aborted\" | \"error\">;\n\t\t\terrorMessage?: string;\n\t\t\tusage: AssistantMessage[\"usage\"];\n\t  };\n\ntype ProxySerializableStreamOptions = Pick<\n\tSimpleStreamOptions,\n\t| \"temperature\"\n\t| \"maxTokens\"\n\t| \"reasoning\"\n\t| \"cacheRetention\"\n\t| \"sessionId\"\n\t| \"headers\"\n\t| \"metadata\"\n\t| \"transport\"\n\t| \"thinkingBudgets\"\n\t| \"maxRetryDelayMs\"\n>;\n\nexport interface ProxyStreamOptions extends ProxySerializableStreamOptions {\n\t/** Local abort signal for the proxy request */\n\tsignal?: AbortSignal;\n\t/** Auth token for the proxy server */\n\tauthToken: string;\n\t/** Proxy server URL (e.g., \"https://genai.example.com\") */\n\tproxyUrl: string;\n}\n\n/**\n * Stream function that proxies through a server instead of calling LLM providers directly.\n * The server strips the partial field from delta events to reduce bandwidth.\n * We reconstruct the partial message client-side.\n *\n * Use this as the `streamFn` option when creating an Agent that needs to go through a proxy.\n *\n * @example\n * ```typescript\n * const agent = new Agent({\n *   streamFn: (model, context, options) =>\n *     streamProxy(model, context, {\n *       ...options,\n *       authToken: await getAuthToken(),\n *       proxyUrl: \"https://genai.example.com\",\n *     }),\n * });\n * ```\n */\nfunction buildProxyRequestOptions(options: ProxyStreamOptions): ProxySerializableStreamOptions {\n\treturn {\n\t\ttemperature: options.temperature,\n\t\tmaxTokens: options.maxTokens,\n\t\treasoning: options.reasoning,\n\t\tcacheRetention: options.cacheRetention,\n\t\tsessionId: options.sessionId,\n\t\theaders: options.headers,\n\t\tmetadata: options.metadata,\n\t\ttransport: options.transport,\n\t\tthinkingBudgets: options.thinkingBudgets,\n\t\tmaxRetryDelayMs: options.maxRetryDelayMs,\n\t};\n}\n\nexport function streamProxy(model: Model<any>, context: Context, options: ProxyStreamOptions): ProxyMessageEventStream {\n\tconst stream = new ProxyMessageEventStream();\n\n\t(async () => {\n\t\t// Initialize the partial message that we'll build up from events\n\t\tconst partial: AssistantMessage = {\n\t\t\trole: \"assistant\",\n\t\t\tstopReason: \"stop\",\n\t\t\tcontent: [],\n\t\t\tapi: model.api,\n\t\t\tprovider: model.provider,\n\t\t\tmodel: model.id,\n\t\t\tusage: {\n\t\t\t\tinput: 0,\n\t\t\t\toutput: 0,\n\t\t\t\tcacheRead: 0,\n\t\t\t\tcacheWrite: 0,\n\t\t\t\ttotalTokens: 0,\n\t\t\t\tcost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },\n\t\t\t},\n\t\t\ttimestamp: Date.now(),\n\t\t};\n\n\t\tlet reader: ReadableStreamDefaultReader<Uint8Array> | undefined;\n\n\t\tconst abortHandler = () => {\n\t\t\tif (reader) {\n\t\t\t\treader.cancel(\"Request aborted by user\").catch(() => {});\n\t\t\t}\n\t\t};\n\n\t\tif (options.signal) {\n\t\t\toptions.signal.addEventListener(\"abort\", abortHandler);\n\t\t}\n\n\t\ttry {\n\t\t\tconst response = await fetch(`${options.proxyUrl}/api/stream`, {\n\t\t\t\tmethod: \"POST\",\n\t\t\t\theaders: {\n\t\t\t\t\tAuthorization: `Bearer ${options.authToken}`,\n\t\t\t\t\t\"Content-Type\": \"application/json\",\n\t\t\t\t},\n\t\t\t\tbody: JSON.stringify({\n\t\t\t\t\tmodel,\n\t\t\t\t\tcontext,\n\t\t\t\t\toptions: buildProxyRequestOptions(options),\n\t\t\t\t}),\n\t\t\t\tsignal: options.signal,\n\t\t\t});\n\n\t\t\tif (!response.ok) {\n\t\t\t\tlet errorMessage = `Proxy error: ${response.status} ${response.statusText}`;\n\t\t\t\ttry {\n\t\t\t\t\tconst errorData = (await response.json()) as { error?: string };\n\t\t\t\t\tif (errorData.error) {\n\t\t\t\t\t\terrorMessage = `Proxy error: ${errorData.error}`;\n\t\t\t\t\t}\n\t\t\t\t} catch {\n\t\t\t\t\t// Couldn't parse error response\n\t\t\t\t}\n\t\t\t\tthrow new Error(errorMessage);\n\t\t\t}\n\n\t\t\treader = response.body!.getReader();\n\t\t\tconst decoder = new TextDecoder();\n\t\t\tlet buffer = \"\";\n\n\t\t\twhile (true) {\n\t\t\t\tconst { done, value } = await reader.read();\n\t\t\t\tif (done) break;\n\n\t\t\t\tif (options.signal?.aborted) {\n\t\t\t\t\tthrow new Error(\"Request aborted by user\");\n\t\t\t\t}\n\n\t\t\t\tbuffer += decoder.decode(value, { stream: true });\n\t\t\t\tconst lines = buffer.split(\"\\n\");\n\t\t\t\tbuffer = lines.pop() || \"\";\n\n\t\t\t\tfor (const line of lines) {\n\t\t\t\t\tif (line.startsWith(\"data: \")) {\n\t\t\t\t\t\tconst data = line.slice(6).trim();\n\t\t\t\t\t\tif (data) {\n\t\t\t\t\t\t\tconst proxyEvent = JSON.parse(data) as ProxyAssistantMessageEvent;\n\t\t\t\t\t\t\tconst event = processProxyEvent(proxyEvent, partial);\n\t\t\t\t\t\t\tif (event) {\n\t\t\t\t\t\t\t\tstream.push(event);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (options.signal?.aborted) {\n\t\t\t\tthrow new Error(\"Request aborted by user\");\n\t\t\t}\n\n\t\t\tstream.end();\n\t\t} catch (error) {\n\t\t\tconst errorMessage = error instanceof Error ? error.message : String(error);\n\t\t\tconst reason = options.signal?.aborted ? \"aborted\" : \"error\";\n\t\t\tpartial.stopReason = reason;\n\t\t\tpartial.errorMessage = errorMessage;\n\t\t\tstream.push({\n\t\t\t\ttype: \"error\",\n\t\t\t\treason,\n\t\t\t\terror: partial,\n\t\t\t});\n\t\t\tstream.end();\n\t\t} finally {\n\t\t\tif (options.signal) {\n\t\t\t\toptions.signal.removeEventListener(\"abort\", abortHandler);\n\t\t\t}\n\t\t}\n\t})();\n\n\treturn stream;\n}\n\n/**\n * Process a proxy event and update the partial message.\n */\nfunction processProxyEvent(\n\tproxyEvent: ProxyAssistantMessageEvent,\n\tpartial: AssistantMessage,\n): AssistantMessageEvent | undefined {\n\tswitch (proxyEvent.type) {\n\t\tcase \"start\":\n\t\t\treturn { type: \"start\", partial };\n\n\t\tcase \"text_start\":\n\t\t\tpartial.content[proxyEvent.contentIndex] = { type: \"text\", text: \"\" };\n\t\t\treturn { type: \"text_start\", contentIndex: proxyEvent.contentIndex, partial };\n\n\t\tcase \"text_delta\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"text\") {\n\t\t\t\tcontent.text += proxyEvent.delta;\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"text_delta\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\tdelta: proxyEvent.delta,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\tthrow new Error(\"Received text_delta for non-text content\");\n\t\t}\n\n\t\tcase \"text_end\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"text\") {\n\t\t\t\tcontent.textSignature = proxyEvent.contentSignature;\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"text_end\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\tcontent: content.text,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\tthrow new Error(\"Received text_end for non-text content\");\n\t\t}\n\n\t\tcase \"thinking_start\":\n\t\t\tpartial.content[proxyEvent.contentIndex] = { type: \"thinking\", thinking: \"\" };\n\t\t\treturn { type: \"thinking_start\", contentIndex: proxyEvent.contentIndex, partial };\n\n\t\tcase \"thinking_delta\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"thinking\") {\n\t\t\t\tcontent.thinking += proxyEvent.delta;\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"thinking_delta\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\tdelta: proxyEvent.delta,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\tthrow new Error(\"Received thinking_delta for non-thinking content\");\n\t\t}\n\n\t\tcase \"thinking_end\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"thinking\") {\n\t\t\t\tcontent.thinkingSignature = proxyEvent.contentSignature;\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"thinking_end\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\tcontent: content.thinking,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\tthrow new Error(\"Received thinking_end for non-thinking content\");\n\t\t}\n\n\t\tcase \"toolcall_start\":\n\t\t\tpartial.content[proxyEvent.contentIndex] = {\n\t\t\t\ttype: \"toolCall\",\n\t\t\t\tid: proxyEvent.id,\n\t\t\t\tname: proxyEvent.toolName,\n\t\t\t\targuments: {},\n\t\t\t\tpartialJson: \"\",\n\t\t\t} satisfies ToolCall & { partialJson: string } as ToolCall;\n\t\t\treturn { type: \"toolcall_start\", contentIndex: proxyEvent.contentIndex, partial };\n\n\t\tcase \"toolcall_delta\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"toolCall\") {\n\t\t\t\t(content as any).partialJson += proxyEvent.delta;\n\t\t\t\tcontent.arguments = parseStreamingJson((content as any).partialJson) || {};\n\t\t\t\tpartial.content[proxyEvent.contentIndex] = { ...content }; // Trigger reactivity\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"toolcall_delta\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\tdelta: proxyEvent.delta,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\tthrow new Error(\"Received toolcall_delta for non-toolCall content\");\n\t\t}\n\n\t\tcase \"toolcall_end\": {\n\t\t\tconst content = partial.content[proxyEvent.contentIndex];\n\t\t\tif (content?.type === \"toolCall\") {\n\t\t\t\tdelete (content as any).partialJson;\n\t\t\t\treturn {\n\t\t\t\t\ttype: \"toolcall_end\",\n\t\t\t\t\tcontentIndex: proxyEvent.contentIndex,\n\t\t\t\t\ttoolCall: content,\n\t\t\t\t\tpartial,\n\t\t\t\t};\n\t\t\t}\n\t\t\treturn undefined;\n\t\t}\n\n\t\tcase \"done\":\n\t\t\tpartial.stopReason = proxyEvent.reason;\n\t\t\tpartial.usage = proxyEvent.usage;\n\t\t\treturn { type: \"done\", reason: proxyEvent.reason, message: partial };\n\n\t\tcase \"error\":\n\t\t\tpartial.stopReason = proxyEvent.reason;\n\t\t\tpartial.errorMessage = proxyEvent.errorMessage;\n\t\t\tpartial.usage = proxyEvent.usage;\n\t\t\treturn { type: \"error\", reason: proxyEvent.reason, error: partial };\n\n\t\tdefault: {\n\t\t\tconst _exhaustiveCheck: never = proxyEvent;\n\t\t\tconsole.warn(`Unhandled proxy event type: ${(proxyEvent as any).type}`);\n\t\t\treturn undefined;\n\t\t}\n\t}\n}\n"]}