Firestore.php

<?php
/**
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * Created by Arthur Mann.
 * Date: 10/05/2019
 * Time: 21:13
 * @important Do not forget install Firestore dependency
 * $ composer require google/cloud-firestore
 */

require_once 'vendor/autoload.php';

use Google\Cloud\Firestore\FirestoreClient;

class Firestore {
    protected $db;
    protected $name;
    public function __construct(string $collection)
    {
        $this->db = new FirestoreClient([
            'projectId' => 'asystems-7692e'
        ]);

        $this->name = $collection;
    }


    /**
     * Get document and all data with checking for exists
     * @param string $name
     * @return array|null|string
     */
    public function getDocument(string $name)
    {
        try {
            if (empty($name)) throw new Exception('Document name missing');
            if ($this->db->collection($this->name)->document($name)->snapshot()->exists()) {
                return $this->db->collection($this->name)->document($name)->snapshot()->data();
            } else {
                throw new Exception('Document are not exists');
            }
        } catch (Exception $exception) {
            return $exception->getMessage();
        }
    }

    /**
     * Get document with where condition
     * @param string $field
     * @param string $operator
     * @param $value
     * @return array
     */
    public function getWhere(string $field, string $operator, $value)
    {
        $arr = [];
        $query = $this->db->collection($this->name)->where($field, $operator, $value)->documents()->rows();
        if (!empty($query)) {
            foreach ($query as $value) {
                $arr[] = $value->data();
            }
        }
        return $arr;
    }

    /**
     * Create new document with data
     * @param string $name
     * @param array $data
     * @return bool|string
     */
    public function newDocument(string $name, array $data = [])
    {
        try {
            $this->db->collection($this->name)->document($name)->create($data);
            return true;
        } catch (Exception $exception){
            return $exception->getMessage();
        }
    }

    /**
     * Create new collection
     * @param string $name
     * @param string $doc_name
     * @param array $data
     * @return bool|string
     */
    public function newCollection(string $name, string $doc_name, array $data = [])
    {
        try {
            $this->db->collection($name)->document($doc_name)->create($data);
            return true;
        } catch (Exception $exception) {
            return $exception->getMessage();
        }
    }

    /**
     * Drop exists document in collection
     * @param string $name
     * @return void
     */
    public function dropDocument(string $name)
    {
        $this->db->collection($this->name)->document($name)->delete();
    }

    /**
     * Drop exists collection
     * @param string $name
     * @return void
     */
    public function dropCollection(string $name)
    {
        $documents = $this->db->collection($name)->limit(1)->documents();
        while (!$documents->isEmpty()) {
            foreach ($documents as $item) {
                $item->reference()->delete();
            }
        }
    }
}