From cbf3f3c1be7a1054aa1eb83fe1c9b6cc4ef4fb7a Mon Sep 17 00:00:00 2001
From: Rajinder Ramgarhia <rramgarhia@vandewater.com>
Date: Mon, 28 Mar 2016 02:07:10 -0400
Subject: [PATCH] Spotify authentication

---
 src/authDataManager/index.js   | 16 +++++----
 src/authDataManager/spotify.js | 64 ++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+), 7 deletions(-)
 create mode 100644 src/authDataManager/spotify.js

diff --git a/src/authDataManager/index.js b/src/authDataManager/index.js
index 77ee7473ea..06873f7e4e 100644
--- a/src/authDataManager/index.js
+++ b/src/authDataManager/index.js
@@ -5,6 +5,7 @@ let meetup = require("./meetup");
 let google = require("./google");
 let github = require("./github");
 let twitter = require("./twitter");
+let spotify = require("./spotify");
 
 let anonymous = {
   validateAuthData: () => {
@@ -23,6 +24,7 @@ let providers = {
   google,
   github,
   twitter,
+  spotify,
   anonymous
 }
 
@@ -33,14 +35,14 @@ module.exports = function(oauthOptions = {}, enableAnonymousUsers = true) {
   }
   // To handle the test cases on configuration
   let getValidatorForProvider = function(provider) {
-    
+
     if (provider === 'anonymous' && !_enableAnonymousUsers) {
       return;
     }
-    
+
     let defaultProvider = providers[provider];
     let optionalProvider = oauthOptions[provider];
-    
+
     if (!defaultProvider && !optionalProvider) {
       return;
     }
@@ -49,7 +51,7 @@ module.exports = function(oauthOptions = {}, enableAnonymousUsers = true) {
     if (optionalProvider) {
       appIds = optionalProvider.appIds;
     }
-    
+
     var validateAuthData;
     var validateAppId;
 
@@ -72,11 +74,11 @@ module.exports = function(oauthOptions = {}, enableAnonymousUsers = true) {
         validateAppId = optionalProvider.validateAppId;
       }
     }
-    
+
     if (!validateAuthData || !validateAppId) {
       return;
     }
-    
+
     return function(authData) {
       return validateAuthData(authData, optionalProvider).then(() => {
         if (appIds) {
@@ -89,6 +91,6 @@ module.exports = function(oauthOptions = {}, enableAnonymousUsers = true) {
 
   return Object.freeze({
     getValidatorForProvider,
-    setEnableAnonymousUsers, 
+    setEnableAnonymousUsers,
   })
 }
diff --git a/src/authDataManager/spotify.js b/src/authDataManager/spotify.js
new file mode 100644
index 0000000000..89c72b8472
--- /dev/null
+++ b/src/authDataManager/spotify.js
@@ -0,0 +1,64 @@
+// Helper functions for accessing the Spotify API.
+var https = require('https');
+var Parse = require('parse/node').Parse;
+
+// Returns a promise that fulfills iff this user id is valid.
+function validateAuthData(authData) {
+  return request('me', authData.access_token)
+    .then((data) => {
+      if (data && data.id == authData.id) {
+        return;
+      }
+      throw new Parse.Error(
+        Parse.Error.OBJECT_NOT_FOUND,
+        'Spotify auth is invalid for this user.');
+    });
+}
+
+// Returns a promise that fulfills if this app id is valid.
+function validateAppId(appIds, authData) {
+  var access_token = authData.access_token;
+  if (!appIds.length) {
+    throw new Parse.Error(
+      Parse.Error.OBJECT_NOT_FOUND,
+      'Spotify auth is not configured.');
+  }
+  return request('me', access_token)
+    .then((data) => {
+      if (data && appIds.indexOf(data.id) != -1) {
+        return;
+      }
+      throw new Parse.Error(
+        Parse.Error.OBJECT_NOT_FOUND,
+        'Spotify auth is invalid for this user.');
+    });
+}
+
+// A promisey wrapper for Spotify API requests.
+function request(path, access_token) {
+  return new Promise(function(resolve, reject) {
+    https.get({
+      host: 'api.spotify.com',
+      path: '/v1/' + path,
+      headers: {
+        'Authorization': 'Bearer '+access_token
+      }
+    }, function(res) {
+      var data = '';
+      res.on('data', function(chunk) {
+        data += chunk;
+      });
+      res.on('end', function() {
+        data = JSON.parse(data);
+        resolve(data);
+      });
+    }).on('error', function(e) {
+      reject('Failed to validate this access token with Spotify.');
+    });
+  });
+}
+
+module.exports = {
+  validateAppId: validateAppId,
+  validateAuthData: validateAuthData
+};