Fix names with spaces in letter-avatars

Seems like there is a possible problem when a name containing a space is
passed to this function. using urlencode on the name should fix possible
problems here.
Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

lib/letter-avatars.js

@@ -30,6 +30,7 @@ exports.generateAvatarURL = function (name, email = '', big = true) {
   if (typeof email !== 'string') {
     email = '' + name + '@example.com'
   }
+  name=encodeURIComponent(name)
 
   let hash = crypto.createHash('md5')
   hash.update(email.toLowerCase())

test/letter-avatars.js

@@ -3,11 +3,50 @@
 'use strict'
 
 const assert = require('assert')
-const avatars = require('../lib/letter-avatars')
+const mock = require('mock-require')
+
+describe('generateAvatarURL() gravatar enabled', function () {
+  let avatars
+  beforeEach(function () {
+    // Reset config to make sure we don't influence other tests
+    let testconfig = {
+      allowGravatar: true,
+      serverURL: 'http://localhost:3000',
+      port: 3000
+    }
+    mock('../lib/config', testconfig)
+    avatars = mock.reRequire('../lib/letter-avatars')
+  })
 
-describe('generateAvatarURL()', function () {
   it('should return correct urls', function () {
     assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels', 'hello@dsprenkels.com', true), 'https://www.gravatar.com/avatar/d41b5f3508cc3f31865566a47dd0336b?s=400')
     assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels', 'hello@dsprenkels.com', false), 'https://www.gravatar.com/avatar/d41b5f3508cc3f31865566a47dd0336b?s=96')
   })
+
+  it('should return correct urls for names with spaces', function () {
+    assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels'), 'http://localhost:3000/user/Daan%20Sprenkels/avatar.svg')
+  })
+})
+
+describe('generateAvatarURL() gravatar disabled', function () {
+  let avatars
+  beforeEach(function () {
+    // Reset config to make sure we don't influence other tests
+    let testconfig = {
+      allowGravatar: false,
+      serverURL: 'http://localhost:3000',
+      port: 3000
+    }
+    mock('../lib/config', testconfig)
+    avatars = mock.reRequire('../lib/letter-avatars')
+  })
+
+  it('should return correct urls', function () {
+    assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels', 'hello@dsprenkels.com', true), 'http://localhost:3000/user/Daan%20Sprenkels/avatar.svg')
+    assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels', 'hello@dsprenkels.com', false), 'http://localhost:3000/user/Daan%20Sprenkels/avatar.svg')
+  })
+
+  it('should return correct urls for names with spaces', function () {
+    assert.strictEqual(avatars.generateAvatarURL('Daan Sprenkels'), 'http://localhost:3000/user/Daan%20Sprenkels/avatar.svg')
+  })
 })