App\Http\Controllers\BeatmapDiscussionPostsController::store PHP Method

    public function store()
    {
        $discussion = BeatmapDiscussion::findOrNew(Request::input('beatmap_discussion_id'));
        $isNewDiscussion = $discussion->id === null;
        if ($isNewDiscussion) {
            $beatmapsetDiscussion = BeatmapsetDiscussion::where('beatmapset_id', Request::input('beatmapset_id'))->firstOrFail();
            $discussion->beatmapset_discussion_id = $beatmapsetDiscussion->id;
        }
        $previousDiscussionResolved = $discussion->resolved;
        $discussion->fill($this->discussionParams($isNewDiscussion));
        priv_check('BeatmapDiscussionPostStore', $discussion)->ensureCan();
        $posts = [new BeatmapDiscussionPost($this->postParams())];
        if (!$isNewDiscussion && $discussion->resolved !== $previousDiscussionResolved) {
            priv_check('BeatmapDiscussionResolve', $discussion)->ensureCan();
            $posts[] = BeatmapDiscussionPost::generateLogResolveChange(Auth::user(), $discussion->resolved);
        }
        try {
            $saved = DB::transaction(function () use($posts, $discussion) {
                if ($discussion->save() === false) {
                    throw new Exception('failed');
                }
                foreach ($posts as $post) {
                    // done here since discussion may or may not previously exist
                    $post->beatmap_discussion_id = $discussion->id;
                    if ($post->save() === false) {
                        throw new Exception('failed');
                    }
                }
                return true;
            });
        } catch (Exception $_e) {
            $saved = false;
        }
        $postIds = array_pluck($posts, 'id');
        if ($saved === true) {
            return ['beatmapset_discussion' => $posts[0]->beatmapsetDiscussion->defaultJson(Auth::user()), 'beatmap_discussion_post_ids' => $postIds, 'beatmap_discussion_id' => $discussion->id];
        } else {
            return error_popup(trans('beatmaps.discussion-posts.store.error'));
        }
    }