<?php
namespace App\Models\Content\ModelTraits;

use App\Models\Content\ContentHasFile;
use App\Models\FileManager\Directory;
use App\Models\FileManager\File;
use Illuminate\Support\Facades\App;

trait Content
{
    /**
     * Upload and assign files to newly created content page
     *
     * @param      $files
     * @param      $assignedFiles
     * @param null $revisionId
     *
     * @return int
     */
    public function uploadRelatedFiles($files, $assignedFiles = [], $revisionId = null)
    {
        $changed = 0;

        // check if any file was removed
        $changed += $this->removeRelatedFiles($revisionId, $assignedFiles);

        // allow uploading only on created pages
        if (!$this->id || !$files[0]) {
            return $changed;
        }

        // find or create new directory for files assigned to content
        $directory = Directory::firstOrCreate([
                                                  'name'   => '.content_files',
                                                  'hidden' => true
                                              ]);
        $data = new \stdClass();
        $data->directoryId = $directory->id;

        $fileModel = App::make(File::class);

        foreach ($files as $file) {
            if (!$file) {
                continue;
            }
            $uploaded = $fileModel->upload($file, $data);

            // add assignement
            ContentHasFile::create([
                                       'file_id'    => $uploaded['id'],
                                       'content_id' => $this->id
                                   ]);

            if ($revisionId) {
                $this->saveHistory($revisionId, 'file', null, ['file' => $uploaded['file']->getClientOriginalName()]);
            }

            $changed++;
        }

        return $changed;
    }

    /**
     * Delete files from association
     *
     * @param $revisionId
     *
     * @return int
     */
    private function removeRelatedFiles($revisionId, $assignedFiles)
    {
        $allFiles = $this->files()
                         ->whereNotIn('id', array_keys($assignedFiles))
                         ->get();

        foreach ($allFiles as $file) {
            ContentHasFile::where('content_id', $this->id)
                          ->where('file_id', $file->id)
                          ->delete();
        }

        return count($allFiles);
    }
}