User:Pathoschild/Scripts/Usejs.js

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/*************
*** Call any JS file in MediaWiki namespace with &usejs parameter
*** by [[m:user:Pathoschild]]
*************/
var pathoschild = pathoschild || {};
pathoschild.usejs = function() {
	/*********
	** Public methods
	*********/
	/**
	 * Initialise the script and load the script if requested.
	 */
	this.initialise = function() {
		var self = this;
		
		// get script info
		var scriptName = self.getScriptName();
		if(!scriptName)
			return;
		var scriptUrl = self.getScriptUrl(scriptName);
		var scriptLink = '<a href="' + mw.util.getUrl(scriptName) + '">' + scriptName + '</a>';

		// load script
		self.notify('↻ loading ' +  scriptName + '...');
		$.getScript(scriptUrl)
			.done(function(data) {
				if(!data)
					self.notify('Couldn\'t load ' + scriptLink + ' because it doesn\'t exist.', 'error');
				else
					self.notify('Loaded ' + scriptLink + '!');
			})
			.fail(function(xhr, settings, err) {
				self.notify('Couldn\'t load ' + scriptLink + ': ' + err, 'error');
			});
	};
	
	/*********
	** Private methods
	*********/
	/**
	 * Get the normalised name of the script to load (like 'MediaWiki:Common.js').
	 */
	this.getScriptName = function() {
		var script = mw.util.getParamValue('usejs');
		return script && 'MediaWiki:' + script + '.js';
	};
	
	/**
	 * Get the executable relative script URL.
	 * @param name The page name of the script to load (like 'MediaWiki:Common.js').
	 */
	this.getScriptUrl = function(name) {
		return mw.config.get('wgScript') + '?title=' + name + '&action=raw&ctype=text/javascript';
	};
	
	/**
	 * Show a notification message to the user.
	 * @param content the text or jQuery element to show to the user.
	 * @param cssClass a CSS class with which to wrap the content (default is 'warning').
	 */
	this.notify = function(content, cssClass) {
		var message = '<span class="' + (cssClass || 'warning') + '">' + content + '</span>';
		var infoBlurb = '<small>You see this because <a href="' + mw.util.getUrl('User:Pathoschild/Scripts/Usejs') + '">usejs</a> is enabled and the URL has &usejs.</small>';
		mw.notify($(message + '<br />' + infoBlurb), { tag: 'usejs' });
	};
	
	this.initialise();
};

$(function() { pathoschild.usejs(); });