<?php

namespace App\CMS\Pipeline\SavePipeline\Process;

use App\CMS\Contracts\Content\SavePipeline\Process;
use App\Models\Content\Content;
use App\Models\Content\ContentHasFile;
use App\Models\FileManager\Directory;
use App\Models\FileManager\File;

class UploadRelatedFiles implements Process
{
    /**
     * Process and modify given page
     *
     * @param Content $page
     * @param array   $input
     *
     * @return void
     */
    function handle(Content & $page, array & $input)
    {
        if (!isset($input['files'])) {
            return;
        }

        $files = $input['files'];
        $assignedFiles = isset($input['keepAssigned']) ? $input['keepAssigned'] : [];

        // check if any file was removed
        $this->removeRelatedFiles($page, $assignedFiles);

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

        // 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(File::class);

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

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

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

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