<?php
/**
 * NotesEmpty.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 * This software may be modified and distributed under the terms of the
 * Creative Commons Attribution-ShareAlike 4.0 International License.
 *
 * See the LICENSE file for details.
 */

declare(strict_types=1);

namespace FireflyIII\TransactionRules\Triggers;

use FireflyIII\Models\Note;
use FireflyIII\Models\TransactionJournal;
use Log;

/**
 * Class NotesEmpty
 *
 * @package FireflyIII\TransactionRules\Triggers
 */
final class NotesEmpty extends AbstractTrigger implements TriggerInterface
{

    /**
     * A trigger is said to "match anything", or match any given transaction,
     * when the trigger value is very vague or has no restrictions. Easy examples
     * are the "AmountMore"-trigger combined with an amount of 0: any given transaction
     * has an amount of more than zero! Other examples are all the "Description"-triggers
     * which have hard time handling empty trigger values such as "" or "*" (wild cards).
     *
     * If the user tries to create such a trigger, this method MUST return true so Firefly III
     * can stop the storing / updating the trigger. If the trigger is in any way restrictive
     * (even if it will still include 99.9% of the users transactions), this method MUST return
     * false.
     *
     * @param null $value
     *
     * @return bool
     */
    public static function willMatchEverything($value = null)
    {
        return false;
    }

    /**
     * @param TransactionJournal $journal
     *
     * @return bool
     */
    public function triggered(TransactionJournal $journal): bool
    {
        /** @var Note $note */
        $note = $journal->notes()->first();
        $text = '';
        if (!is_null($note)) {
            $text = $note->text;
        }

        if (strlen($text) === 0) {

            Log::debug(sprintf('RuleTrigger NotesEmpty for journal #%d: strlen is 0, return true.', $journal->id));

            return true;
        }

        Log::debug(sprintf('RuleTrigger NotesEmpty for journal #%d: strlen > 0, return false.', $journal->id));

        return false;
    }
}