/**
   * jQuery plugin for micro templates
   *

   * Strings are automatically escaped, but that can be disabled by setting
   * escapeFunction to null.

   *
   * Usage examples:
   *
   *	var htmlStr = '<p>Bake, uncovered, until the {greasystuff} is melted and the {pasta} is heated through, about {min} minutes.</p>'
   *	$(htmlStr).octemplate({greasystuff: 'cheese', pasta: 'macaroni', min: 10});
   *
   * 	var htmlStr = '<p>Welcome back {user}</p>';
   *	$(htmlStr).octemplate({user: 'John Q. Public'}, {escapeFunction: null});
   *

   * Be aware that the target string must be wrapped in an HTML element for the
   * plugin to work. The following won't work:

   * 
   *      var textStr = 'Welcome back {user}';
   *      $(textStr).octemplate({user: 'John Q. Public'});
   *

   * For anything larger than one-liners, you can use a simple $.get() ajax
   * request to get the template, or you can embed them it the page using the
   * text/template type:

   *
   * <script id="contactListItemTemplate" type="text/template">
   *	<tr class="contact" data-id="{id}">
   *		<td class="name">
   *			<input type="checkbox" name="id" value="{id}" /><span class="nametext">{name}</span>
   *		</td>
   *		<td class="email">
   *			<a href="mailto:{email}">{email}</a>
   *		</td>
   *		<td class="phone">{phone}</td>
   *	</tr>
   * </script>
   *
   * var $tmpl = $('#contactListItemTemplate');
   * var contacts = // fetched in some ajax call
   *
   * $.each(contacts, function(idx, contact) {
   * 		$contactList.append(
   * 			$tmpl.octemplate({
   * 				id: contact.getId(),
   * 				name: contact.getDisplayName(),
   * 				email: contact.getPreferredEmail(),
   * 				phone: contact.getPreferredPhone(),
   * 			});
   * 		);
   * });
   */
  (function( $ ) {
  	/**
  	* Object Template
  	* Inspired by micro templating done by e.g. underscore.js
  	*/
  	var Template = {
  		init: function(vars, options, elem) {
  			// Mix in the passed in options with the default options
  			this.vars = vars;
  			this.options = $.extend({},this.options,options);
  
  			this.elem = elem;
  			var self = this;
  
  			if(typeof this.options.escapeFunction === 'function') {
  				var keys = Object.keys(this.vars);
  				for (var key = 0; key < keys.length; key++) {
  					if(typeof this.vars[keys[key]] === 'string') {
  						this.vars[keys[key]] = self.options.escapeFunction(this.vars[keys[key]]);
  					}
  				}
  			}
  
  			var _html = this._build(this.vars);
  			return $(_html);
  		},
  		// From stackoverflow.com/questions/1408289/best-way-to-do-variable-interpolation-in-javascript
  		_build: function(o){
  			var data = this.elem.attr('type') === 'text/template' ? this.elem.html() : outerHTML(this.elem.get(0));
  			try {
  				return data.replace(/{([^{}]*)}/g,
  					function (a, b) {
  						var r = o[b];
  						return typeof r === 'string' || typeof r === 'number' ? r : a;
  					}
  				);
  			} catch(e) {
  				console.error(e, 'data:', data);
  			}
  		},
  		options: {
  			escapeFunction: escapeHTML
  		}
  	};
  
  	$.fn.octemplate = function(vars, options) {
  		var vars = vars ? vars : {};
  		if(this.length) {
  			var _template = Object.create(Template);
  			return _template.init(vars, options, this);
  		}
  	};
  
  })( jQuery );