<?php

namespace WP_CLI\Doctor\Check;

use FilesystemIterator;
use WP_CLI;
use WP_CLI\Doctor\Check;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;

/**
 * Detects and reports the path of files for occurrences of the `wp_cache_flush()` function.
 */
class Cache_Flush extends File_Contents {

    public function run() {

        // Path to wp-content directory.
        $wp_content_dir = defined( 'WP_CONTENT_DIR' ) ? WP_CONTENT_DIR : ABSPATH . 'wp-content';
        $directory      = new RecursiveDirectoryIterator( $wp_content_dir, FilesystemIterator::SKIP_DOTS );
        $iterator       = new RecursiveIteratorIterator( $directory, RecursiveIteratorIterator::CHILD_FIRST );

        // Regex to match.
        $this->regex = 'wp_cache_flush\(\)';

        foreach ( $iterator as $file ) {
            $this->check_file( $file );
        }

        if ( empty( $this->_matches ) ) {
            $this->set_status( 'success' );
            $this->set_message( 'Use of wp_cache_flush() not found.' );
            return;
        }

        // Show relative paths in output.
        $relative_paths = array_map(
            function ( $file ) use ( $wp_content_dir ) {
                return str_replace( $wp_content_dir . '/', '', $file );
            },
            $this->_matches
        );

        $this->set_status( 'warning' );
        $this->set_message( 'Use of wp_cache_flush() detected in ' . implode( ', ', $relative_paths ) );
    }
}