added token(s) retrieval function + tests + makefile for tests

Makefile

@@ -0,0 +1,16 @@
+REPORTER = spec
+
+test:
+	@NODE_ENV=test mocha \
+		--reporter $(REPORTER) \
+		--timeout 8000
+
+test-w:
+	@NODE_ENV=test mocha \
+		--reporter $(REPORTER) \
+		--timeout 8000 \
+		--watch
+
+
+
+.PHONY: test test-w

config/config.js

@@ -0,0 +1,4 @@
+module.exports = {
+	"client_secret" : "ZYUifIK5crKoqNIDiOkAAZaz",
+	"client_id" : "532620919617.apps.googleusercontent.com"
+};

index.js

@@ -2,52 +2,86 @@ var request = require('request'),
 	exec = require('child_process').exec,
 	querystring = require('querystring');
 
-var events = require('events');
-
 
 module.exports =  function(opts) {
-	if(!opts.redirect_uri){
-		opts.redirect_uri = 'http://localhost:3000/callback'; 
-	}
-
-	var gAuth = {};
-
-	var endpoint = 'https://accounts.google.com/o/oauth2/auth';
-
-	function getAuthCode(callback){
-		var qs = {
-			response_type: 'code',
-			client_id: opts.client_id,
-			redirect_uri: opts.redirect_uri,
-			scope: 'https://www.googleapis.com/auth/userinfo.profile'	
-		};
-
-		var url = '\''+endpoint + '?' + querystring.stringify(qs) +'\'';
-
-		exec('open '+url, function(err){
-			if(err !== null){
-				console.log(err);
-			}
-		});
-
-		var server = require('http').createServer(function(req, res) {
-			if(req.url.match(/callback/)) return parseCode(req, res)
-		}).listen(3000);
-
-		function parseCode(req,res){
-			//for gdrive-cli:
-			//instead of just closing the connection, redirect to an informational page
-			server.close();
-
-			//split url by ? so we just have the querystring left
-			//extract out the auth code
-			callback(querystring.parse(req.url.split('?')[1])['code']);
-		}
-	}
-
-	gAuth.getAuthCode = getAuthCode;
-
-	gAuth.
-
-	return gAuth;
-};
+  if(!opts.redirect_uri){
+    opts.redirect_uri = 'http://localhost:3000/callback'; 
+  }
+
+  var gAuth = {};
+
+  var endpoint = 'https://accounts.google.com/o/oauth2/auth';
+
+  /**
+   * Constructs a google OAuth2 request url using the provided opts.
+   * Spawns an http server to handle the redirect. Once user authenticates
+   * and the server parses the auth code, the server process is closed
+   * (Assuming the user has closed the window. For future, add redirect after
+   * authentication to a page with instructions to close tab/window).
+   */
+  function getAuthCode(callback){
+    var qs = {
+      response_type: 'code',
+      client_id: opts.client_id,
+      redirect_uri: opts.redirect_uri,
+      scope: 'https://www.googleapis.com/auth/userinfo.profile'	
+    };
+
+    var uri = '\''+endpoint + '?' + querystring.stringify(qs) +'\'';
+
+    exec('open '+uri, function(err){
+      if(err !== null){
+        callback(err);
+      }
+      var server = require('http').createServer(function(req, res) {
+        if(req.url.match(/callback/)) return parseCode(req, res)
+      }).listen(3000);
+
+      function parseCode(req,res){
+        //for gdrive-cli:
+        //instead of just closing the connection, redirect to an informational page
+        server.close();
+
+        //split url by ? so we just have the querystring left
+        //extract out the auth code
+        callback(null, querystring.parse(req.url.split('?')[1])['code']);
+      }
+
+    });
+  }
+
+  /**
+   * Given the acquired authorization code and the provided opts,
+   * construct a POST request to acquire the access token and refresh
+   * token.
+   *
+   * @param {String} code The acquired authorization code
+   */
+  function getTokens(code, callback){
+    var uri = 'https://accounts.google.com/o/oauth2/token';
+    var form = {
+      code : code,
+      client_id : opts.client_id,
+      client_secret: opts.client_secret,
+      redirect_uri: opts.redirect_uri,
+      grant_type: 'authorization_code'
+    };
+
+    request.post({url:uri, form: form}, function(err,req, body){
+      if(err !== null){
+        callback(err);
+      }else{
+        callback(null, JSON.parse(body));
+      }
+    });
+  }
+
+  gAuth.getAuthCode = getAuthCode;
+
+  gAuth.getTokens = getTokens;
+
+  //gAuth.refreshToken = refreshToken;
+
+  return gAuth;
+
+};