# All files / src/server trpc-adapter.ts

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61.11% Branches 11/18
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     /**
     * tRPC HTTP Adapter
     *
     * Handles tRPC requests over HTTP using node:http.
     * Routes /trpc/* requests to the tRPC router.
     */

    import type { IncomingMessage, ServerResponse } from 'node:http';
    import { fetchRequestHandler } from '@trpc/server/adapters/fetch';
    import { appRouter, createContext } from '../trpc/index.js';
    import type { EventBus } from '../events/index.js';
    import type { AgentManager } from '../agent/types.js';
    import type { TaskRepository } from '../db/repositories/task-repository.js';
    import type { MessageRepository } from '../db/repositories/message-repository.js';
    import type { InitiativeRepository } from '../db/repositories/initiative-repository.js';
    import type { PhaseRepository } from '../db/repositories/phase-repository.js';
    import type { PageRepository } from '../db/repositories/page-repository.js';
    import type { ProjectRepository } from '../db/repositories/project-repository.js';
    import type { AccountRepository } from '../db/repositories/account-repository.js';
    import type { ChangeSetRepository } from '../db/repositories/change-set-repository.js';
    import type { LogChunkRepository } from '../db/repositories/log-chunk-repository.js';
    import type { ConversationRepository } from '../db/repositories/conversation-repository.js';
    import type { AccountCredentialManager } from '../agent/credentials/types.js';
    import type { DispatchManager, PhaseDispatchManager } from '../dispatch/types.js';
    import type { CoordinationManager } from '../coordination/types.js';
    import type { BranchManager } from '../git/branch-manager.js';
    import type { ExecutionOrchestrator } from '../execution/orchestrator.js';
    import type { PreviewManager } from '../preview/index.js';

    /**
     * Options for creating the tRPC request handler.
     */
    export interface TrpcAdapterOptions {
      /** Event bus for inter-module communication */
      eventBus: EventBus;
      /** When the server started */
      serverStartedAt: Date;
      /** Number of managed processes */
      processCount: number;
      /** Agent manager for agent lifecycle operations (optional until full wiring) */
      agentManager?: AgentManager;
      /** Task repository for task CRUD operations */
      taskRepository?: TaskRepository;
      /** Message repository for agent-user communication */
      messageRepository?: MessageRepository;
      /** Initiative repository for initiative CRUD operations */
      initiativeRepository?: InitiativeRepository;
      /** Phase repository for phase CRUD operations */
      phaseRepository?: PhaseRepository;
      /** Dispatch manager for task queue operations */
      dispatchManager?: DispatchManager;
      /** Coordination manager for merge queue operations */
      coordinationManager?: CoordinationManager;
      /** Phase dispatch manager for phase queue operations */
      phaseDispatchManager?: PhaseDispatchManager;
      /** Page repository for page CRUD operations */
      pageRepository?: PageRepository;
      /** Project repository for project CRUD and initiative-project junction operations */
      projectRepository?: ProjectRepository;
      /** Account repository for account CRUD and load balancing */
      accountRepository?: AccountRepository;
      /** Change set repository for agent change set operations */
      changeSetRepository?: ChangeSetRepository;
      /** Log chunk repository for agent output persistence */
      logChunkRepository?: LogChunkRepository;
      /** Credential manager for account OAuth token management */
      credentialManager?: AccountCredentialManager;
      /** Branch manager for git branch operations */
      branchManager?: BranchManager;
      /** Execution orchestrator for phase merge/review workflow */
      executionOrchestrator?: ExecutionOrchestrator;
      /** Preview manager for Docker-based preview deployments */
      previewManager?: PreviewManager;
      /** Conversation repository for inter-agent communication */
      conversationRepository?: ConversationRepository;
      /** Absolute path to the workspace root (.cwrc directory) */
      workspaceRoot?: string;
    }

    /**
     * Creates a tRPC request handler for node:http.
     *
     * Converts IncomingMessage/ServerResponse to fetch Request/Response
     * and delegates to the tRPC fetch adapter.
     *
     * @param options - Adapter options with context values
     * @returns Request handler function
     */
    export function createTrpcHandler(options: TrpcAdapterOptions) {
      return async (req: IncomingMessage, res: ServerResponse): Promise<void> => {
        // Build full URL from request
        const protocol = 'http';
        const host = req.headers.host ?? 'localhost';
        const url = new URL(req.url ?? '/', `${protocol}://${host}`);

        // Read request body if present
        let body: string | undefined;
        Iif (req.method !== 'GET' && req.method !== 'HEAD') {
          body = await new Promise<string>((resolve) => {
            let data = '';
            req.on('data', (chunk: Buffer) => {
              data += chunk.toString();
            });
            req.on('end', () => {
              resolve(data);
            });
          });
        }

        // Convert headers to fetch Headers
        const headers = new Headers();
        for (const [key, value] of Object.entries(req.headers)) {
          Eif (value) {
            Iif (Array.isArray(value)) {
              value.forEach((v) => headers.append(key, v));
            } else {
              headers.set(key, value);
            }
          }
        }

        // Create fetch Request
        const fetchRequest = new Request(url.toString(), {
          method: req.method,
          headers,
          body: body ?? undefined,
        });

        // Handle with tRPC fetch adapter
        const fetchResponse = await fetchRequestHandler({
          endpoint: '/trpc',
          req: fetchRequest,
          router: appRouter,
          createContext: () =>
            createContext({
              eventBus: options.eventBus,
              serverStartedAt: options.serverStartedAt,
              processCount: options.processCount,
              agentManager: options.agentManager,
              taskRepository: options.taskRepository,
              messageRepository: options.messageRepository,
              initiativeRepository: options.initiativeRepository,
              phaseRepository: options.phaseRepository,
              dispatchManager: options.dispatchManager,
              coordinationManager: options.coordinationManager,
              phaseDispatchManager: options.phaseDispatchManager,
              pageRepository: options.pageRepository,
              projectRepository: options.projectRepository,
              accountRepository: options.accountRepository,
              changeSetRepository: options.changeSetRepository,
              logChunkRepository: options.logChunkRepository,
              credentialManager: options.credentialManager,
              branchManager: options.branchManager,
              executionOrchestrator: options.executionOrchestrator,
              previewManager: options.previewManager,
              conversationRepository: options.conversationRepository,
              workspaceRoot: options.workspaceRoot,
            }),
        });

        // Send response
        res.statusCode = fetchResponse.status;

        // Set response headers BEFORE streaming body
        fetchResponse.headers.forEach((value, key) => {
          res.setHeader(key, value);
        });

        // Stream body if it's a ReadableStream (SSE subscriptions), otherwise buffer
        if (fetchResponse.body) {
          const reader = fetchResponse.body.getReader();
          const pump = async () => {
            while (true) {
              const { done, value } = await reader.read();
              if (done) {
                res.end();
                return;
              }
              res.write(value);
            }
          };
          pump().catch(() => res.end());
        } else E{
          const responseBody = await fetchResponse.text();
          res.end(responseBody);
        }
      };
    }