@devgrid/netron/dist/esm/task-manager.js

Event bus, streams and remote object invocation.

import { pathToFileURL } from 'url';
import { readdir } from 'fs/promises';
export class TaskManager {
    constructor({ timeout = 5000, overwriteStrategy = 'replace', } = {}) {
        this.tasks = new Map();
        this.timeout = timeout;
        this.overwriteStrategy = overwriteStrategy;
    }
    addTask(fn) {
        if (typeof fn !== 'function') {
            throw new Error('Task must be a function');
        }
        if (!fn.name) {
            throw new Error('Task function must have a name');
        }
        const existingTask = this.tasks.get(fn.name);
        if (existingTask) {
            switch (this.overwriteStrategy) {
                case 'replace':
                    this.tasks.set(fn.name, fn);
                    break;
                case 'skip':
                    return;
                case 'throw':
                    throw new Error(`Task already exists: ${fn.name}`);
                default:
                    throw new Error(`Unknown overwrite strategy: ${this.overwriteStrategy}`);
            }
        }
        else {
            this.tasks.set(fn.name, fn);
        }
    }
    async loadTasksFromDir(directory) {
        try {
            const files = (await readdir(directory)).filter((f) => f.endsWith('.js'));
            for (const file of files) {
                let fileUrl = `${directory}/${file}`;
                if (typeof require !== 'function') {
                    fileUrl = pathToFileURL(`${directory}/${file}`).href;
                }
                const module = await import(fileUrl);
                this._registerModule(module);
            }
        }
        catch (error) {
            throw new Error(`Failed to load tasks from directory (${directory}): ${error.message || error}`);
        }
    }
    async runTask(name, ...args) {
        const task = this.tasks.get(name);
        if (!task) {
            throw new Error(`Task not found: ${name}`);
        }
        return new Promise((resolve, reject) => {
            const timer = setTimeout(() => {
                reject(new Error(`Task timed out: ${name} (${this.timeout}ms)`));
            }, this.timeout);
            try {
                const result = task(...args);
                if (result instanceof Promise) {
                    result
                        .then(resolve)
                        .catch(reject)
                        .finally(() => clearTimeout(timer));
                }
                else {
                    clearTimeout(timer);
                    resolve(result);
                }
            }
            catch (error) {
                clearTimeout(timer);
                reject(error);
            }
        });
    }
    _registerModule(module) {
        for (const [name, fn] of Object.entries(module)) {
            if (typeof fn === 'function') {
                this.addTask(fn);
            }
        }
    }
}
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