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import * as fs from 'node:fs';
import * as path from 'node:path';
import {hrtime} from 'node:process';
import {IncomingMessage, Server, ServerResponse} from 'node:http';
import {FastifyInstance} from 'fastify';
import type {ItemStat} from '@owservable/folders';
import addRoute from './add.route';
import cleanRelativePath from './clean.relative.path';
let routesRootFolder: string;
const NS_PER_SEC: number = 1e9;
const addFastifyRoutes = async (
fastify: FastifyInstance<Server<typeof IncomingMessage, typeof ServerResponse>, IncomingMessage, ServerResponse<IncomingMessage>>,
folder: string,
verbose: boolean = false
): Promise<void> => {
if (!routesRootFolder) routesRootFolder = folder;
const fileNames: string[] = await fs.promises.readdir(folder);
const stats: ItemStat[] = await Promise.all(
fileNames.map(
async (name): Promise<ItemStat> => ({
name,
fullPath: path.join(folder, name),
isDirectory: (await fs.promises.lstat(path.join(folder, name))).isDirectory()
})
)
);
const files: ItemStat[] = stats.filter((stat: ItemStat): boolean => !stat.isDirectory);
const folders: ItemStat[] = stats.filter((stat: ItemStat): boolean => stat.isDirectory);
// Process files in parallel batches for better performance
const BATCH_SIZE = 10; // Process up to 10 files concurrently
const validFiles: ItemStat[] = files.filter((file: ItemStat): boolean => {
const ext: string = path.extname(file.name);
return ext === '.ts' || ext === '.js';
});
const processFile = async (file: ItemStat): Promise<void> => {
const ext: string = path.extname(file.name);
const relativeFilePath: string = cleanRelativePath(routesRootFolder, file.fullPath, ext as '.ts' | '.js');
const start: number = Number(hrtime.bigint());
const routeModule: {default?: unknown} = require(file.fullPath) as {default?: unknown};
const routes: unknown = routeModule.default || routeModule;
const time: number = Number(Number(hrtime.bigint()) - start) / NS_PER_SEC;
if (verbose) console.log('[@owservable/fastify-auto-routes] -> addFastifyRoutes: loaded file', `[${time.toFixed(3)}s] ${folder}/${file.name}`);
if (Array.isArray(routes)) {
for (const route of routes) {
addRoute(fastify, route, relativeFilePath, verbose);
}
} else {
addRoute(fastify, routes, relativeFilePath, verbose);
}
};
// Process files in parallel batches
for (let i = 0; i < validFiles.length; i += BATCH_SIZE) {
const batch: ItemStat[] = validFiles.slice(i, i + BATCH_SIZE);
await Promise.all(batch.map(processFile));
}
// Process subdirectories in parallel for better performance
await Promise.all(
folders.map(async (sub: ItemStat): Promise<void> => {
await addFastifyRoutes(fastify, sub.fullPath, verbose);
})
);
};
export default addFastifyRoutes;
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