<?php

namespace WP_CLI\Doctor\Check;

use WP_CLI;
use WP_CLI\Doctor\Check;

/**
 * Warns when there are language updates available.
 */
class Language_Update extends Check {

    public function run() {

        // Runs the `wp language core list --format=json` command and returns the output in JSON format.
        $languages = WP_CLI::runcommand(
            'language core list --format=json',
            array(
                'return' => true,
                'parse'  => 'json',
                'launch' => false,
            )
        );

        // Returns the count of each value that the key 'update' is mapped to.
        $counts = array_count_values( array_column( $languages, 'update' ) );

        // Returns the count of 'update' of type 'available'.
        $update_count = array_key_exists( 'available', $counts ) ? $counts['available'] : 0;

        // If there are no updates available.
        if ( ! $update_count ) {
            $this->set_status( 'success' );
            $this->set_message( 'Languages are up to date.' );
            return;
        }

        // Singular/Plural message depending on $update_count.
        $message = ( 1 === $update_count )
        ? '1 language has an update available.'
        : "{$update_count} languages have updates available.";

        $this->set_status( 'warning' );
        $this->set_message( $message );
    }
}