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gaia/shared/pages/import/js/flow.js

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+/* global oauthflow */
+'use strict';
+
+/*
+ *  Module: Facebook integration
+ *
+ *  This script file contains all the logic that allows to obtain an access
+ *  token through an OAuth 2.0 implicit grant flow
+ *
+ *
+ *
+ */
+
+if (typeof window.oauthflow === 'undefined') {
+  (function(document) {
+
+    var OAuthFlow = window.oauthflow = {};
+
+    var OAUTH_REDIRECT = 'redirectURI';
+    var ENDPOINT = 'loginPage';
+    var APP_ID = 'applicationId';
+    var SCOPE = 'scope';
+    var APP_ORIGIN = location.origin;
+
+    /**
+     *  Initialization function it tries to find an access token
+     *
+     */
+    OAuthFlow.init = function(service) {
+      var hash = document.location.hash.substring(1);
+      var parameters = {};
+
+      var dataStart = hash.indexOf('access_token');
+      if (dataStart !== -1) {
+        var elements = hash.split('&');
+
+        elements.forEach(function(p) {
+          var values = p.split('=');
+          parameters[values[0]] = values[1];
+        });
+
+        window.opener.postMessage(parameters, APP_ORIGIN);
+
+        // Finally the window is closed
+        window.close();
+      }
+    }; // init
+
+
+    OAuthFlow.start = function(state, service) {
+      getAccessToken(state, service);
+    };
+
+
+    /**
+     *  Obtains the access token. The access token is retrieved from the local
+     *  storage and if not present a OAuth 2.0 flow is started
+     *
+     *
+     */
+    function getAccessToken(state, service) {
+      startOAuth(state, service);
+    }
+
+    /**
+     *  Starts a OAuth 2.0 flow to obtain the user information
+     *
+     */
+    function startOAuth(state, service) {
+      var params = oauthflow.params[service];
+
+      var redirect_uri = encodeURIComponent(params[OAUTH_REDIRECT]);
+
+      var scope = params[SCOPE].join(',');
+      var scopeParam = encodeURIComponent(scope);
+
+      var queryParams = ['client_id=' + params[APP_ID],
+                          'redirect_uri=' + redirect_uri,
+                          'response_type=token',
+                          'scope=' + scopeParam,
+                          // Only needed for Gmail (see Bug 962377)
+                          'approval_prompt=force',
+                          'state=' + state
+      ]; // Query params
+
+    var query = queryParams.join('&');
+    var url = params[ENDPOINT] + query;
+
+    window.open(url, '', 'dialog');
+  }
+
+  })(document);
+}