Fixes various bugs in mandrill.js

Adds more detailed logging to mandrill.js
Send confirmation emails on learner account signup.

controllers/auth.js

@@ -2,6 +2,8 @@ var bcrypt = require('bcrypt');
 var passwords = require('../lib/passwords');
 var usernames = require('../lib/usernames');
 var db = require('../db');
+var email = require('../mandrill');
+var logger = require('../logger');
 var learners = db.model('Learner');
 var guardians = db.model('Guardian');
 var signupTokens = db.model('SignupToken');
@@ -178,6 +180,7 @@ function processChildLearnerSignup (req, res, next) {
           }).complete(function(err) {
             if (err) return fail(err);
 
+            email.send('<13 learner signup', {}, signup.parent_email);
             delete req.session.signup;
             req.flash('modal', {
               title: 'Welcome to the Chicago Summer of Learning',
@@ -239,6 +242,7 @@ function processStandardLearnerSignup (req, res, next) {
             return fail(err);
           }
 
+          email.send('learner signup', {}, signup.email);
           delete req.session.signup;
           redirectUser(req, res, user);
         });

mandrill.js

@@ -7,7 +7,7 @@ const FAKE_EMAIL = ('DEBUG' in process.env)
 
 var request = require('request');
 if (FAKE_EMAIL) {
-  request = function(opts, cb) {
+  request.post = function(opts, cb) {
     logger.log('debug', 'FAKE EMAIL: request.post with opts', opts); 
     cb('EMAIL DISABLED');
   };
@@ -18,7 +18,8 @@ const ENDPOINT = process.env['CSOL_MANDRILL_URL'] ||
 const KEY = process.env['CSOL_MANDRILL_KEY'];
 
 const TEMPLATES = {
-  test: 'test'
+  '<13 learner signup': 'csol-13-signup',
+  'learner signup': 'csol-signup'
 }
 
 module.exports = {
@@ -66,7 +67,7 @@ module.exports = {
 
     var payload = {
       key: KEY,
-      template_name: template,
+      template_name: TEMPLATES[template],
       template_content: [],
       message: {
         to: recipients,
@@ -89,6 +90,21 @@ module.exports = {
       if (response.statusCode !== 200)
         return callback(body);
 
+      var unsent = [];
+      _.map(body, function(result) {
+        var level = 'info';
+        if (['sent', 'queued'].indexOf(result.status) === -1) {
+          level = 'error';
+          unsent.push(result);
+        }
+        logger.log(level, 'Learner signup email %s for %s', result.status, result.email);
+      });
+      if (unsent.length) 
+        return callback({ 
+          message: 'Some addresses not sent or queued',
+          results: unsent
+        });
+
       return callback(null, body);
     });
   }