Asynchronous Module Definition (AMD) Loader in Angular

This challenge asks you to implement a custom Angular service that mimics the functionality of an AMD (Asynchronous Module Definition) loader. AMD is a specification for dynamically loading JavaScript modules, and while Angular now primarily uses its own module system, understanding AMD can be valuable for legacy code or specific use cases. Your service should be able to load modules defined using the AMD format and make them available within an Angular component.

Problem Description

You need to create an AMDLoaderService in Angular that can load modules defined using the AMD format. The service should accept a module ID (a string representing the module's path or name) and asynchronously load the module using requirejs. Once the module is loaded, the service should return a promise that resolves with the loaded module. The service should handle potential errors during the loading process.

Key Requirements:

• Asynchronous Loading: The module loading must be asynchronous, using requirejs to fetch the module.
• Promise-Based: The service should return a promise that resolves with the loaded module or rejects with an error.
• Error Handling: The service must gracefully handle errors that occur during module loading (e.g., module not found, network errors).
• RequireJS Dependency: The service assumes requirejs is already configured and available in the environment. You do not need to configure requirejs itself.
• Angular Integration: The service should be a standard Angular service, injectable into components.

Expected Behavior:

When loadModule(moduleId) is called:

1. requirejs is used to load the module specified by moduleId.
2. If the module loads successfully, the promise resolves with the loaded module.
3. If the module fails to load (e.g., 404 error, timeout), the promise rejects with an appropriate error message.

Edge Cases to Consider:

• Module ID is invalid or empty.
• requirejs is not properly configured.
• Network errors during module loading.
• Circular dependencies (though you don't need to explicitly handle them, the loader should not crash).
• Module not found.

Examples

Example 1:

Input: moduleId = 'myModule' (where myModule.js defines a module: define('myModule', function() { return { myFunc: function() { console.log('Hello from myModule!'); } }; }));
Output: Promise resolving with { myFunc: function() { console.log('Hello from myModule!'); } }
Explanation: The service uses requirejs to load 'myModule', which returns the module object. The promise resolves with this object.

Example 2:

Input: moduleId = 'nonExistentModule'
Output: Promise rejecting with an error message like "Module 'nonExistentModule' not found."
Explanation: The service attempts to load 'nonExistentModule' but fails. The promise rejects with an error indicating the module was not found.

Example 3: (Error Handling)

Input: moduleId = 'moduleWithNetworkError' (simulating a network error during loading)
Output: Promise rejecting with an error message like "Network error while loading module 'moduleWithNetworkError'."
Explanation: The service attempts to load the module, but a network error occurs. The promise rejects with an error message indicating the network issue.

Constraints

• Module ID Length: The moduleId string should be no longer than 255 characters.
• RequireJS Availability: The code assumes requirejs is globally available. You do not need to check for its existence.
• Performance: The loading process should be reasonably efficient. Avoid unnecessary delays or resource consumption. While absolute performance isn't the primary focus, avoid obvious inefficiencies.
• Error Message Clarity: Error messages should be informative and helpful for debugging.

Notes

• You'll need to inject requirejs into your Angular service. This assumes requirejs is available in the global scope.
• Consider using try...catch blocks to handle potential errors during the module loading process.
• The define function used in AMD modules is not part of the standard JavaScript environment. requirejs provides this functionality.
• Focus on the core functionality of loading and resolving/rejecting the promise. Advanced features like dependency management are not required for this challenge.
• Remember that requirejs is asynchronous. Use promises correctly to handle the asynchronous nature of the loading process.