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moduleLoader.js
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moduleLoader.js
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/**
* Class for managing modules
*
* A module in this context is essentially a Javascript class (not to be confused with
* ResourceLoader modules).
*
* @class ModuleLoader
*/
function ModuleLoader() {
/**
* @property {Object} register of defined modules
* @private
*/
this._register = {};
}
ModuleLoader.prototype = {
/**
* Require (import) a module previously defined using define().
* Searches core module registry using ResourceLoader require before consulting
* its own local registry. This method is deprecated, please do not use.
*
* @memberof ModuleLoader
* @instance
* @param {string} id Required module id.
* @return {Object} Required module, can be any JavaScript object.
*/
require( id ) {
const registry = this._register;
/**
* @return {Object} Module
*/
function localRequire() {
if ( !Object.hasOwnProperty.call( registry, id ) ) {
throw new Error( 'MobileFrontend Module not found: ' + id );
}
return registry[id];
}
const args = id.split( '/' );
try {
const module = __non_webpack_require__( args[0] );
if ( module[args[1]] ) {
return module[args[1]];
} else {
return localRequire();
}
} catch ( e ) {
return localRequire();
}
},
/**
* Define a module which can be later required (imported) using require().
*
* @memberof ModuleLoader
* @instance
* @param {string} id Defined module id.
* @param {Object} obj Defined module body, can be any JavaScript object.
* @return {Object}
*/
define( id, obj ) {
const self = this;
if ( Object.hasOwnProperty.call( this._register, id ) ) {
throw new Error( 'Module already exists: ' + id );
}
this._register[id] = obj;
// return an object of additionally functions to do with the registered module
return {
/**
* @see ModuleLoader#deprecate
* @param {string} deprecatedId Defined module id, which is deprecated.
* @ignore
*/
deprecate( deprecatedId ) {
self.deprecate( deprecatedId, obj, id );
}
};
},
/**
* Deprecate a module and give an replacement (if there is any).
*
* @memberof ModuleLoader
* @instance
* @param {string} id Defined module id, which is deprecated.
* @param {Object} obj Defined module body, can be any JavaScript object.
* @param {string} [replacement] Give an optional replacement for this module (which
* needs to be already defined!)
*/
deprecate( id, obj, replacement ) {
let msg;
if ( replacement ) {
// add an alternative for this module, if any given
msg = 'Use ' + replacement + ' instead.';
}
// register it as a deprecated one
mw.log.deprecate( this._register, id, obj, msg );
}
};
module.exports = ModuleLoader;

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