Create Spotify.gs (#245)

* Create Spotify.gs

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* Update Spotify.gs

* Update Spotify.gs

* Update Spotify.gs

* Update Spotify.gs

* Update Spotify.gs

* Update Spotify.gs

Author: rotti

samples/Spotify.gs

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+/*
+* This sample demonstrates how to configure the library for the Spotify API.
+* Instructions on how to generate OAuth credentuals is available here:
+* https://developer.spotify.com/documentation/general/guides/authorization-guide/
+*/
+
+var CLIENT_ID = '...';
+var CLIENT_SECRET = '...';
+
+/**
+* Authorizes and makes a request to the Spotify API.
+*/
+function run() {
+  var service = getService();
+  if (service.hasAccess()) {
+    var url = 'https://api.spotify.com/v1/me';
+    var response = UrlFetchApp.fetch(url, {
+      headers: {'Authorization': 'Bearer ' + service.getAccessToken()}
+    });
+    var result = JSON.parse(response.getContentText());
+    Logger.log(JSON.stringify(result, null, 2));
+  } else {
+    var authorizationUrl = service.getAuthorizationUrl();
+    Logger.log('Open the following URL and re-run the script: %s',
+               authorizationUrl);
+  }
+}
+
+/**
+* Reset the authorization state, so that it can be re-tested.
+*/
+function reset() {
+  getService().reset();
+}
+
+/**
+* Configures the service.
+*/
+function getService() {
+  return OAuth2.createService('Spotify')
+    // Set the endpoint URLs.
+    .setAuthorizationBaseUrl('https://accounts.spotify.com/authorize')
+    .setTokenUrl('https://accounts.spotify.com/api/token')
+
+    // Set the client ID and secret.
+    .setClientId(CLIENT_ID)
+    .setClientSecret(CLIENT_SECRET)
+
+    // Set the name of the callback function that should be invoked to complete
+    // the OAuth flow.
+    .setCallbackFunction('authCallback')
+
+    // Set the property store where authorized tokens should be persisted.
+    .setPropertyStore(PropertiesService.getUserProperties());
+}
+
+/**
+* Handles the OAuth callback.
+*/
+function authCallback(request) {
+  var service = getService();
+  var authorized = service.handleCallback(request);
+  if (authorized) {
+    return HtmlService.createHtmlOutput('Success!');
+  } else {
+    return HtmlService.createHtmlOutput('Denied.');
+  }
+}
+
+/**
+ * Logs the redict URI to register.
+ */
+function logRedirectUri() {
+  Logger.log(OAuth2.getRedirectUri());
+}