/**

* @license AngularJS v1.0.8
* (c) 2010-2012 Google, Inc. http://angularjs.org
* License: MIT
*/

(function(window, angular, undefined) { ‘use strict’;

/**

* @ngdoc overview
* @name ngResource
* @description
*/

/**

* @ngdoc object
* @name ngResource.$resource
* @requires $http
*
* @description
* A factory which creates a resource object that lets you interact with
* [RESTful](http://en.wikipedia.org/wiki/Representational_State_Transfer) server-side data sources.
*
* The returned resource object has action methods which provide high-level behaviors without
* the need to interact with the low level {@link ng.$http $http} service.
*
* # Installation
* To use $resource make sure you have included the `angular-resource.js` that comes in Angular 
* package. You can also find this file on Google CDN, bower as well as at
* {@link http://code.angularjs.org/ code.angularjs.org}.
*
* Finally load the module in your application:
*
*        angular.module('app', ['ngResource']);
*
* and you are ready to get started!
*
* @param {string} url A parameterized URL template with parameters prefixed by `:` as in
*   `/user/:username`. If you are using a URL with a port number (e.g. 
*   `http://example.com:8080/api`), you'll need to escape the colon character before the port
*   number, like this: `$resource('http://example.com\\:8080/api')`.
*
* @param {Object=} paramDefaults Default values for `url` parameters. These can be overridden in
*   `actions` methods.
*
*   Each key value in the parameter object is first bound to url template if present and then any
*   excess keys are appended to the url search query after the `?`.
*
*   Given a template `/path/:verb` and parameter `{verb:'greet', salutation:'Hello'}` results in
*   URL `/path/greet?salutation=Hello`.
*
*   If the parameter value is prefixed with `@` then the value of that parameter is extracted from
*   the data object (useful for non-GET operations).
*
* @param {Object.<Object>=} actions Hash with declaration of custom action that should extend the
*   default set of resource actions. The declaration should be created in the following format:
*
*       {action1: {method:?, params:?, isArray:?},
*        action2: {method:?, params:?, isArray:?},
*        ...}
*
*   Where:
*
*   - `action` – {string} – The name of action. This name becomes the name of the method on your
*     resource object.
*   - `method` – {string} – HTTP request method. Valid methods are: `GET`, `POST`, `PUT`, `DELETE`,
*     and `JSONP`
*   - `params` – {object=} – Optional set of pre-bound parameters for this action.
*   - isArray – {boolean=} – If true then the returned object for this action is an array, see
*     `returns` section.
*
* @returns {Object} A resource "class" object with methods for the default set of resource actions
*   optionally extended with custom `actions`. The default set contains these actions:
*
*       { 'get':    {method:'GET'},
*         'save':   {method:'POST'},
*         'query':  {method:'GET', isArray:true},
*         'remove': {method:'DELETE'},
*         'delete': {method:'DELETE'} };
*
*   Calling these methods invoke an {@link ng.$http} with the specified http method,
*   destination and parameters. When the data is returned from the server then the object is an
*   instance of the resource class. The actions `save`, `remove` and `delete` are available on it
*   as  methods with the `$` prefix. This allows you to easily perform CRUD operations (create,
*   read, update, delete) on server-side data like this:
*   <pre>
       var User = $resource('/user/:userId', {userId:'@id'});
       var user = User.get({userId:123}, function() {
         user.abc = true;
         user.$save();
       });
    </pre>
*
*   It is important to realize that invoking a $resource object method immediately returns an
*   empty reference (object or array depending on `isArray`). Once the data is returned from the
*   server the existing reference is populated with the actual data. This is a useful trick since
*   usually the resource is assigned to a model which is then rendered by the view. Having an empty
*   object results in no rendering, once the data arrives from the server then the object is
*   populated with the data and the view automatically re-renders itself showing the new data. This
*   means that in most case one never has to write a callback function for the action methods.
*
*   The action methods on the class object or instance object can be invoked with the following
*   parameters:
*
*   - HTTP GET "class" actions: `Resource.action([parameters], [success], [error])`
*   - non-GET "class" actions: `Resource.action([parameters], postData, [success], [error])`
*   - non-GET instance actions:  `instance.$action([parameters], [success], [error])`
*
*
* @example
*
* # Credit card resource
*
* <pre>
    // Define CreditCard class
    var CreditCard = $resource('/user/:userId/card/:cardId',
     {userId:123, cardId:'@id'}, {
      charge: {method:'POST', params:{charge:true}}
     });

    // We can retrieve a collection from the server
    var cards = CreditCard.query(function() {
      // GET: /user/123/card
      // server returns: [ {id:456, number:'1234', name:'Smith'} ];

      var card = cards[0];
      // each item is an instance of CreditCard
      expect(card instanceof CreditCard).toEqual(true);
      card.name = "J. Smith";
      // non GET methods are mapped onto the instances
      card.$save();
      // POST: /user/123/card/456 {id:456, number:'1234', name:'J. Smith'}
      // server returns: {id:456, number:'1234', name: 'J. Smith'};

      // our custom method is mapped as well.
      card.$charge({amount:9.99});
      // POST: /user/123/card/456?amount=9.99&charge=true {id:456, number:'1234', name:'J. Smith'}
    });

    // we can create an instance as well
    var newCard = new CreditCard({number:'0123'});
    newCard.name = "Mike Smith";
    newCard.$save();
    // POST: /user/123/card {number:'0123', name:'Mike Smith'}
    // server returns: {id:789, number:'01234', name: 'Mike Smith'};
    expect(newCard.id).toEqual(789);
* </pre>
*
* The object returned from this function execution is a resource "class" which has "static" method
* for each action in the definition.
*
* Calling these methods invoke `$http` on the `url` template with the given `method` and `params`.
* When the data is returned from the server then the object is an instance of the resource type and
* all of the non-GET methods are available with `$` prefix. This allows you to easily support CRUD
* operations (create, read, update, delete) on server-side data.

  <pre>
    var User = $resource('/user/:userId', {userId:'@id'});
    var user = User.get({userId:123}, function() {
      user.abc = true;
      user.$save();
    });
  </pre>
*
* It's worth noting that the success callback for `get`, `query` and other method gets passed
* in the response that came from the server as well as $http header getter function, so one
* could rewrite the above example and get access to http headers as:
*
  <pre>
    var User = $resource('/user/:userId', {userId:'@id'});
    User.get({userId:123}, function(u, getResponseHeaders){
      u.abc = true;
      u.$save(function(u, putResponseHeaders) {
        //u => saved user object
        //putResponseHeaders => $http header getter
      });
    });
  </pre>

* # Buzz client

  Let's look at what a buzz client created with the `$resource` service looks like:
   <doc:example>
     <doc:source jsfiddle="false">
      <script>
        function BuzzController($resource) {
          this.userId = 'googlebuzz';
          this.Activity = $resource(
            'https://www.googleapis.com/buzz/v1/activities/:userId/:visibility/:activityId/:comments',
            {alt:'json', callback:'JSON_CALLBACK'},
            {get:{method:'JSONP', params:{visibility:'@self'}}, replies: {method:'JSONP', params:{visibility:'@self', comments:'@comments'}}}
          );
        }

        BuzzController.prototype = {
          fetch: function() {
            this.activities = this.Activity.get({userId:this.userId});
          },
          expandReplies: function(activity) {
            activity.replies = this.Activity.replies({userId:this.userId, activityId:activity.id});
          }
        };
        BuzzController.$inject = ['$resource'];
      </script>

      <div ng-controller="BuzzController">
        <input ng-model="userId"/>
        <button ng-click="fetch()">fetch</button>
        <hr/>
        <div ng-repeat="item in activities.data.items">
          <h1 style="font-size: 15px;">
            <img src="{{item.actor.thumbnailUrl}}" style="max-height:30px;max-width:30px;"/>
            <a href="{{item.actor.profileUrl}}">{{item.actor.name}}</a>
            <a href ng-click="expandReplies(item)" style="float: right;">Expand replies: {{item.links.replies[0].count}}</a>
          </h1>
          {{item.object.content | html}}
          <div ng-repeat="reply in item.replies.data.items" style="margin-left: 20px;">
            <img src="{{reply.actor.thumbnailUrl}}" style="max-height:30px;max-width:30px;"/>
            <a href="{{reply.actor.profileUrl}}">{{reply.actor.name}}</a>: {{reply.content | html}}
          </div>
        </div>
      </div>
     </doc:source>
     <doc:scenario>
     </doc:scenario>
   </doc:example>
*/

angular.module(‘ngResource’, [‘ng’]).

factory('$resource', ['$http', '$parse', function($http, $parse) {
  var DEFAULT_ACTIONS = {
    'get':    {method:'GET'},
    'save':   {method:'POST'},
    'query':  {method:'GET', isArray:true},
    'remove': {method:'DELETE'},
    'delete': {method:'DELETE'}
  };
  var noop = angular.noop,
      forEach = angular.forEach,
      extend = angular.extend,
      copy = angular.copy,
      isFunction = angular.isFunction,
      getter = function(obj, path) {
        return $parse(path)(obj);
      };

  /**
   * We need our custom method because encodeURIComponent is too aggressive and doesn't follow
   * http://www.ietf.org/rfc/rfc3986.txt with regards to the character set (pchar) allowed in path
   * segments:
   *    segment       = *pchar
   *    pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
   *    pct-encoded   = "%" HEXDIG HEXDIG
   *    unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
   *    sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
   *                     / "*" / "+" / "," / ";" / "="
   */
  function encodeUriSegment(val) {
    return encodeUriQuery(val, true).
      replace(/%26/gi, '&').
      replace(/%3D/gi, '=').
      replace(/%2B/gi, '+');
  }

  /**
   * This method is intended for encoding *key* or *value* parts of query component. We need a custom
   * method becuase encodeURIComponent is too agressive and encodes stuff that doesn't have to be
   * encoded per http://tools.ietf.org/html/rfc3986:
   *    query       = *( pchar / "/" / "?" )
   *    pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
   *    unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
   *    pct-encoded   = "%" HEXDIG HEXDIG
   *    sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
   *                     / "*" / "+" / "," / ";" / "="
   */
  function encodeUriQuery(val, pctEncodeSpaces) {
    return encodeURIComponent(val).
      replace(/%40/gi, '@').
      replace(/%3A/gi, ':').
      replace(/%24/g, '$').
      replace(/%2C/gi, ',').
      replace(/%20/g, (pctEncodeSpaces ? '%20' : '+'));
  }

  function Route(template, defaults) {
    this.template = template = template + '#';
    this.defaults = defaults || {};
    var urlParams = this.urlParams = {};
    forEach(template.split(/\W/), function(param){
      if (param && (new RegExp("(^|[^\\\\]):" + param + "\\W").test(template))) {
        urlParams[param] = true;
      }
    });
    this.template = template.replace(/\\:/g, ':');
  }

  Route.prototype = {
    url: function(params) {
      var self = this,
          url = this.template,
          val,
          encodedVal;

      params = params || {};
      forEach(this.urlParams, function(_, urlParam){
        val = params.hasOwnProperty(urlParam) ? params[urlParam] : self.defaults[urlParam];
        if (angular.isDefined(val) && val !== null) {
          encodedVal = encodeUriSegment(val);
          url = url.replace(new RegExp(":" + urlParam + "(\\W)", "g"), encodedVal + "$1");
        } else {
          url = url.replace(new RegExp("(\/?):" + urlParam + "(\\W)", "g"), function(match,
              leadingSlashes, tail) {
            if (tail.charAt(0) == '/') {
              return tail;
            } else {
              return leadingSlashes + tail;
            }
          });
        }
      });
      url = url.replace(/\/?#$/, '');
      var query = [];
      forEach(params, function(value, key){
        if (!self.urlParams[key]) {
          query.push(encodeUriQuery(key) + '=' + encodeUriQuery(value));
        }
      });
      query.sort();
      url = url.replace(/\/*$/, '');
      return url + (query.length ? '?' + query.join('&') : '');
    }
  };

  function ResourceFactory(url, paramDefaults, actions) {
    var route = new Route(url);

    actions = extend({}, DEFAULT_ACTIONS, actions);

    function extractParams(data, actionParams){
      var ids = {};
      actionParams = extend({}, paramDefaults, actionParams);
      forEach(actionParams, function(value, key){
        ids[key] = value.charAt && value.charAt(0) == '@' ? getter(data, value.substr(1)) : value;
      });
      return ids;
    }

    function Resource(value){
      copy(value || {}, this);
    }

    forEach(actions, function(action, name) {
      action.method = angular.uppercase(action.method);
      var hasBody = action.method == 'POST' || action.method == 'PUT' || action.method == 'PATCH';
      Resource[name] = function(a1, a2, a3, a4) {
        var params = {};
        var data;
        var success = noop;
        var error = null;
        switch(arguments.length) {
        case 4:
          error = a4;
          success = a3;
          //fallthrough
        case 3:
        case 2:
          if (isFunction(a2)) {
            if (isFunction(a1)) {
              success = a1;
              error = a2;
              break;
            }

            success = a2;
            error = a3;
            //fallthrough
          } else {
            params = a1;
            data = a2;
            success = a3;
            break;
          }
        case 1:
          if (isFunction(a1)) success = a1;
          else if (hasBody) data = a1;
          else params = a1;
          break;
        case 0: break;
        default:
          throw "Expected between 0-4 arguments [params, data, success, error], got " +
            arguments.length + " arguments.";
        }

        var value = this instanceof Resource ? this : (action.isArray ? [] : new Resource(data));
        $http({
          method: action.method,
          url: route.url(extend({}, extractParams(data, action.params || {}), params)),
          data: data
        }).then(function(response) {
            var data = response.data;

            if (data) {
              if (action.isArray) {
                value.length = 0;
                forEach(data, function(item) {
                  value.push(new Resource(item));
                });
              } else {
                copy(data, value);
              }
            }
            (success||noop)(value, response.headers);
          }, error);

        return value;
      };

      Resource.prototype['$' + name] = function(a1, a2, a3) {
        var params = extractParams(this),
            success = noop,
            error;

        switch(arguments.length) {
        case 3: params = a1; success = a2; error = a3; break;
        case 2:
        case 1:
          if (isFunction(a1)) {
            success = a1;
            error = a2;
          } else {
            params = a1;
            success = a2 || noop;
          }
        case 0: break;
        default:
          throw "Expected between 1-3 arguments [params, success, error], got " +
            arguments.length + " arguments.";
        }
        var data = hasBody ? this : undefined;
        Resource[name].call(this, params, data, success, error);
      };
    });

    Resource.bind = function(additionalParamDefaults){
      return ResourceFactory(url, extend({}, paramDefaults, additionalParamDefaults), actions);
    };

    return Resource;
  }

  return ResourceFactory;
}]);

})(window, window.angular);