Upgrade to L5 + huge refactor + more. closes #2

New stuff:
- Signup + email confirmation.
- Updated authentication strategy with remember cookies. closes #5
- New search system with some example gambits! This is cool - check out
the source. Fulltext drivers will be implemented as decorators
overriding the EloquentPostRepository’s findByContent method.
- Lay down the foundation for bootstrapping the Ember app.
- Update Web layer’s asset manager to properly publish CSS/JS files.
- Console commands to run installation migrations and seeds.

Refactoring:
- New structure: move models, repositories, commands, and events into
their own namespaces, rather than grouping by entity.
- All events are classes.
- Use L5 middleware and command bus implementations.
- Clearer use of repositories and the Active Record pattern.
Repositories are used only for retrieval of ActiveRecord objects, and
then save/delete operations are called directly on those ActiveRecords.
This way, we don’t over-abstract at the cost of Eloquent magic, but
testing is still easy.
- Refactor of Web layer so that it uses the Actions routing
architecture.
- “Actor” concept instead of depending on Laravel’s Auth.
- General cleanup!

src/Api/Serializers/DiscussionSerializer.php

@@ -0,0 +1,145 @@
+<?php namespace Flarum\Api\Serializers;
+
+use Flarum\Core\Models\Discussion;
+use Flarum\Core\Models\DiscussionState;
+
+class DiscussionSerializer extends DiscussionBasicSerializer
+{
+    /**
+     * Default relations to include.
+     * @var array
+     */
+    protected $include = ['startUser', 'lastUser'];
+
+    /**
+     * Serialize attributes of a Discussion model for JSON output.
+     *
+     * @param Discussion $discussion The Discussion model to serialize.
+     * @return array
+     */
+    protected function attributes(Discussion $discussion)
+    {
+        $attributes = parent::attributes($discussion);
+
+        $user = static::$actor->getUser();
+        $state = $discussion->stateFor($user);
+
+        $attributes += [
+            'commentsCount'  => (int) $discussion->comments_count,
+            'startTime'      => $discussion->start_time->toRFC3339String(),
+            'lastTime'       => $discussion->last_time ? $discussion->last_time->toRFC3339String() : null,
+            'lastPostNumber' => $discussion->last_post_number,
+            'canReply'       => $discussion->can($user, 'reply'),
+            'canEdit'        => $discussion->can($user, 'edit'),
+            'canDelete'      => $discussion->can($user, 'delete'),
+
+            'readTime'       => $state && $state->read_time ? $state->read_time->toRFC3339String() : null,
+            'readNumber'     => $state ? (int) $state->read_number : 0
+        ];
+
+        $this->attributesEvent($discussion, $attributes);
+
+        return $attributes;
+    }
+
+    /**
+     * Get a collection containing a discussion's viewable post IDs.
+     *
+     * @param Discussion $discussion
+     * @return Tobscure\JsonApi\Collection
+     */
+    public function linkPosts(Discussion $discussion)
+    {
+        $user = static::$actor->getUser();
+
+        return (new PostBasicSerializer)->collection($discussion->posts()->whereCan($user, 'view')->orderBy('time', 'asc')->ids());
+    }
+
+    /**
+     * Get a collection containing a discussion's viewable posts. Assumes that
+     * the discussion model's posts attributes has been filled.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Collection
+     */
+    public function includePosts(Discussion $discussion, $relations)
+    {
+        return (new PostSerializer($relations))->collection($discussion->posts);
+    }
+
+    /**
+     * Get a collection containing a discussion's relevant posts. Assumes that
+     * the discussion model's relevantPosts attributes has been filled (this
+     * happens in the DiscussionFinder.)
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Collection
+     */
+    public function includeRelevantPosts(Discussion $discussion, $relations)
+    {
+        return (new PostBasicSerializer($relations))->collection($discussion->relevantPosts);
+    }
+
+    /**
+     * Get a resource containing a discussion's start user.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Resource
+     */
+    public function includeStartUser(Discussion $discussion, $relations)
+    {
+        return (new UserBasicSerializer($relations))->resource($discussion->startUser);
+    }
+
+    /**
+     * Get a resource containing a discussion's starting post.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Resource
+     */
+    public function includeStartPost(Discussion $discussion, $relations)
+    {
+        return (new PostBasicSerializer($relations))->resource($discussion->startPost);
+    }
+
+    /**
+     * Get a resource containing a discussion's last user.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Resource
+     */
+    public function includeLastUser(Discussion $discussion, $relations)
+    {
+        return (new UserBasicSerializer($relations))->resource($discussion->lastUser);
+    }
+
+    /**
+     * Get a resource containing a discussion's last post.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Resource
+     */
+    public function includeLastPost(Discussion $discussion, $relations)
+    {
+        return (new PostBasicSerializer($relations))->resource($discussion->lastPost);
+    }
+
+    /**
+     * Get a resource containing a discussion's list of posts that have been
+     * added during this request.
+     *
+     * @param Discussion $discussion
+     * @param array $relations
+     * @return Tobscure\JsonApi\Collection
+     */
+    public function includeAddedPosts(Discussion $discussion, $relations)
+    {
+        return (new PostBasicSerializer($relations))->collection($discussion->getAddedPosts());
+    }
+}