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import * as path from 'path';
import { scanApiDirectory } from '../../core/file-system/scan-api-dir.js';
import { watchApiDirectory, type ApiWatcher } from '../../core/file-system/watch-api-dir.js';
import { createRoute } from '../../core/routing/route-parser.js';
import { routesToSchema } from '../../core/types/schema.js';
import { runFileGeneration } from '../../core/generation/run-file-generation.js';
import { patternToRegex } from '../../core/normalize/normalize-path.js';
import { createSocketHandler, type SocketEntry } from '../../core/socket/socket-handler.js';
import { extractBodyTypeFromFile, extractQueryTypeFromFile } from '../../core/file-system/extract-type-from-file.js';
import { API_BASE_PATH, SOCKET_BASE_PATH } from '../../shared/constants.js';
import type { OpenApiOptions } from '../../core/openapi/generate.js';
import type { Route, RouteHandler, Middleware } from '../../core/routing/route-types.js';
import type { LoadedMiddleware } from '../../core/middleware/get-applicable-middlewares.js';
import type { BeforeApiRequestHook } from '../../core/server/request-handler.js';
import type { AfterTypesGeneratedContext } from '../../plugin/plugin-api.js';
import type { VitekLogger } from './logger.js';
function deduplicateRoutesByKey(routes: Route[]): Route[] {
const seen = new Set<string>();
return routes.filter((r) => {
const key = `${r.method}:${r.pattern}`;
if (seen.has(key)) return false;
seen.add(key);
return true;
});
}
function deduplicateSocketsByPattern<T extends { pattern: string }>(sockets: T[]): T[] {
const seen = new Set<string>();
return sockets.filter((s) => {
if (seen.has(s.pattern)) return false;
seen.add(s.pattern);
return true;
});
}
export interface ViteDevServerOptions {
root: string;
apiDir: string;
logger: VitekLogger;
viteServer: ViteDevServer;
enableValidation?: boolean;
openApi?: OpenApiOptions | boolean;
sockets?: boolean;
socketBasePath?: string;
onGenerationError?: (error: Error) => void;
beforeApiRequest?: BeforeApiRequestHook[];
afterTypesGenerated?: ((ctx: AfterTypesGeneratedContext) => void | Promise<void>)[];
apiBasePath?: string;
cors?: boolean | import('../../core/server/cors.js').CorsOptions;
trustProxy?: boolean;
maxBodySize?: number;
onError?: (err: Error, req: import('http').IncomingMessage, res: import('http').ServerResponse) => void | Promise<void>;
}
export class DevServerState {
routes: Route[] = [];
middlewares: LoadedMiddleware[] = [];
sockets: SocketEntry[] = [];
watcher: ApiWatcher | null = null;
constructor(private options: ViteDevServerOptions) {}
async initialize() {
await this.reload(false);
this.setupWatcher();
}
async reload(showReloadLog = true) {
if (showReloadLog) {
this.options.logger.info('Reloading API routes...');
}
const scanResult = scanApiDirectory(this.options.apiDir);
this.middlewares.length = 0;
for (const middlewareInfo of scanResult.middlewares) {
try {
const relativePath = path.relative(this.options.root, middlewareInfo.path);
const vitePath = `/${relativePath.replace(/\\/g, '/')}`;
const middlewareModule = await this.options.viteServer.ssrLoadModule(vitePath);
const middleware = middlewareModule.default || middlewareModule.middleware;
let middlewareArray: Middleware[] = [];
if (Array.isArray(middleware)) {
middlewareArray = middleware;
} else if (typeof middleware === 'function') {
middlewareArray = [middleware];
}
if (middlewareArray.length > 0) {
let pathPatterns: string[] | undefined;
if (middlewareInfo.basePattern === '' && middlewareModule.config?.path) {
const raw = Array.isArray(middlewareModule.config.path) ? middlewareModule.config.path : [middlewareModule.config.path];
pathPatterns = raw.map((p: string) => String(p).replace(/^\/api\/?/, '').replace(/^\/+|\/+$/g, '')).filter(Boolean);
}
this.middlewares.push({
middleware: middlewareArray,
basePattern: middlewareInfo.basePattern,
pathPatterns,
});
}
} catch (error) {
this.options.logger.warn(
`Failed to load middleware ${middlewareInfo.path}: ${error instanceof Error ? error.message : String(error)}`
);
}
}
const totalMiddlewareCount = this.middlewares.reduce((sum, m) => sum + m.middleware.length, 0);
this.options.logger.middlewareLoaded(totalMiddlewareCount);
this.routes.length = 0;
for (const parsedRoute of scanResult.routes) {
try {
const relativePath = path.relative(this.options.root, parsedRoute.file);
const vitePath = `/${relativePath.replace(/\\/g, '/')}`;
const handlerModule = await this.options.viteServer.ssrLoadModule(vitePath);
const handler: RouteHandler = handlerModule.default || handlerModule.handler || handlerModule[parsedRoute.method];
if (typeof handler !== 'function') {
this.options.logger.warn(
`Route file ${parsedRoute.file} does not export a handler function`
);
continue;
}
const bodyType = extractBodyTypeFromFile(parsedRoute.file);
const queryType = extractQueryTypeFromFile(parsedRoute.file);
const route = createRoute(parsedRoute, handler, bodyType, queryType);
this.routes.push(route);
} catch (error) {
this.options.logger.error(
`Failed to load route ${parsedRoute.file}: ${error instanceof Error ? error.message : String(error)}`
);
}
}
this.routes = deduplicateRoutesByKey(this.routes);
const routesInfo = this.routes.map((r) => ({
method: r.method,
pattern: r.pattern,
}));
this.options.logger.routesRegistered(routesInfo, API_BASE_PATH);
this.sockets.length = 0;
const socketsEnabled = this.options.sockets !== false;
if (socketsEnabled) {
for (const parsedSocket of scanResult.sockets) {
try {
const relativePath = path.relative(this.options.root, parsedSocket.file);
const vitePath = `/${relativePath.replace(/\\/g, '/')}`;
const handlerModule = await this.options.viteServer.ssrLoadModule(vitePath);
const handler = handlerModule.default ?? handlerModule.handler;
if (typeof handler !== 'function') {
this.options.logger.warn(
`Socket file ${parsedSocket.file} does not export a handler function`
);
continue;
}
const regex = patternToRegex(parsedSocket.pattern);
this.sockets.push({
pattern: parsedSocket.pattern,
params: parsedSocket.params,
file: parsedSocket.file,
regex,
handler,
});
} catch (error) {
this.options.logger.error(
`Failed to load socket ${parsedSocket.file}: ${error instanceof Error ? error.message : String(error)}`
);
}
}
}
this.sockets = deduplicateSocketsByPattern(this.sockets);
const socketBasePath = this.options.socketBasePath ?? SOCKET_BASE_PATH;
this.options.logger.socketsRegistered(
this.sockets.map((s) => ({ pattern: s.pattern })),
socketBasePath
);
await this.generateTypes();
}
setupWatcher() {
if (this.watcher) {
this.watcher.close();
}
this.watcher = watchApiDirectory(this.options.apiDir, async (event, filePath) => {
this.options.logger.info(`API file ${event}: ${filePath}`);
await this.reload();
});
}
async generateTypes() {
try {
const schema = routesToSchema(this.routes);
const socketBasePath = this.options.socketBasePath ?? SOCKET_BASE_PATH;
const port = this.options.viteServer.config.server?.port || 5173;
await runFileGeneration({
root: this.options.root,
schema,
sockets: this.sockets,
apiBasePath: API_BASE_PATH,
socketBasePath,
openApi: this.options.openApi,
serverPort: port,
logger: {
typesGenerated: (p) => this.options.logger.typesGenerated(p),
servicesGenerated: (p) => this.options.logger.servicesGenerated(p),
info: (m) => this.options.logger.info(m),
warn: (m) => this.options.logger.warn(m),
},
onGenerationError: this.options.onGenerationError,
});
const apiBasePath = this.options.apiBasePath ?? API_BASE_PATH;
for (const hook of this.options.afterTypesGenerated ?? []) {
await hook({
root: this.options.root,
schema,
sockets: this.sockets.map((s) => ({ pattern: s.pattern, params: s.params, file: s.file })),
apiBasePath,
socketBasePath,
});
}
} catch (error) {
const err = error instanceof Error ? error : new Error(String(error));
this.options.logger.error(`Failed to generate types: ${err.message}`);
this.options.onGenerationError?.(err);
}
}
cleanup() {
if (this.watcher) {
this.watcher.close();
this.watcher = null;
}
}
}
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