144 lines
4.3 KiB
TypeScript
144 lines
4.3 KiB
TypeScript
/**
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* API Client for Mail Manager
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* Provides a centralized way to make API calls with envelope wrapping/unwrapping
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*/
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import { createFetchWrapper } from '@KTXC';
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import type { ApiRequest, ApiResponse, ApiStreamResponse } from '../types/common';
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const fetchWrapper = createFetchWrapper();
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const API_URL = '/m/mail_manager/v1';
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const API_VERSION = 1;
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/**
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* Generate a unique transaction ID
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*/
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export function generateTransactionId(): string {
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return `${Date.now()}-${Math.random().toString(36).substring(2, 9)}`;
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}
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/**
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* Make an API call with automatic envelope wrapping and unwrapping
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*
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* @param operation - Operation name (e.g., 'provider.list', 'service.autodiscover')
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* @param data - Operation-specific request data
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* @param user - Optional user identifier override
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* @returns Promise with unwrapped response data
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* @throws Error if the API returns an error status
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*/
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export async function transceivePost<TRequest, TResponse>(
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operation: string,
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data: TRequest,
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user?: string
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): Promise<TResponse> {
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const request: ApiRequest<TRequest> = {
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version: API_VERSION,
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transaction: generateTransactionId(),
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operation,
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data,
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user
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};
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const response: ApiResponse<TResponse> = await fetchWrapper.post(API_URL, request);
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if (response.status === 'error') {
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const errorMessage = `[${operation}] ${response.data.message}${response.data.code ? ` (code: ${response.data.code})` : ''}`;
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throw new Error(errorMessage);
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}
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return response.data;
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}
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/**
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* Stream an NDJSON API response, unwrapping data frames for the caller.
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*
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* The server emits one JSON object per line with a transport-level `type`
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* discriminant. This helper consumes control and error frames, forwards only
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* unwrapped `data` payloads to the caller, and returns the final stream total.
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*
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* @param operation - Operation name, e.g. 'entity.stream'
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* @param data - Operation-specific request data
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* @param onData - Synchronous callback invoked for every unwrapped data payload.
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* May throw to abort the stream.
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* @param user - Optional user identifier override
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* @returns Promise resolving to the final stream total from the control/end frame
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*/
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export async function transceiveStream<TRequest, TData>(
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operation: string,
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data: TRequest,
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onData: (data: TData) => void,
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user?: string
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): Promise<{ total: number }> {
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const request: ApiRequest<TRequest> = {
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version: API_VERSION,
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transaction: generateTransactionId(),
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operation,
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data,
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user,
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};
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let total = 0;
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await fetchWrapper.post(API_URL, request, {
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//headers: { 'Accept': 'application/x-ndjson' },
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headers: { 'Accept': 'application/json' },
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onStream: async (response: Response) => {
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if (!response.body) {
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throw new Error(`[${operation}] Response body is not readable`);
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}
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const reader = response.body.getReader();
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const decoder = new TextDecoder();
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let buffer = '';
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try {
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while (true) {
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const { done, value } = await reader.read();
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if (done) break;
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buffer += decoder.decode(value, { stream: true });
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const lines = buffer.split('\n');
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buffer = lines.pop()!; // retain any incomplete trailing chunk
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for (const line of lines) {
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if (!line.trim()) continue;
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const message = JSON.parse(line) as ApiStreamResponse<TData>;
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if (message.type === 'control') {
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if (message.status === 'end') {
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total = message.total;
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}
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continue;
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}
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if (message.type === 'error') {
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throw new Error(`[${operation}] ${message.message}`);
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}
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onData(message.data);
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}
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}
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// flush any remaining bytes still in the buffer
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if (buffer.trim()) {
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const message = JSON.parse(buffer) as ApiStreamResponse<TData>;
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if (message.type === 'control') {
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if (message.status === 'end') {
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total = message.total;
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}
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} else if (message.type === 'error') {
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throw new Error(`[${operation}] ${message.message}`);
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} else {
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onData(message.data);
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}
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}
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} finally {
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reader.releaseLock();
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}
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},
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});
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return { total };
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}
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