<?php


    if ( ! defined( 'ABSPATH' ) ) {
        exit;
    }

    if ( ! class_exists( 'Redux_Filesystem' ) ) {
        class Redux_Filesystem {

            /**
             * Instance of this class.
             *
             * @since    1.0.0
             * @var      object
             */
            protected static $instance = null;

            protected static $direct = null;

            private $creds = array();

            public $fs_object = null;

            public $parent = null;

            /**
             * Return an instance of this class.
             *
             * @since     1.0.0
             * @return    object    A single instance of this class.
             */
            public static function get_instance( $parent = null ) {

                // If the single instance hasn't been set, set it now.
                if ( null == self::$instance ) {
                    self::$instance = new self;
                }

                if ( $parent !== null ) {
                    self::$instance->parent = $parent;
                }

                return self::$instance;
            }

            public function ftp_form() {
                if ( isset( $this->parent->ftp_form ) && ! empty( $this->parent->ftp_form ) ) {
                    echo '<div class="wrap"><div class="error"><p>';
                    echo '<strong>' . __( 'File Permission Issues', 'dina-kala' ) . '</strong><br/>' . sprintf( __( 'We were unable to modify required files. Please ensure that <code>%1s</code> has the proper read-write permissions, or modify your wp-config.php file to contain your FTP login credentials as <a href="%2s" target="_blank">outlined here</a>.', 'dina-kala' ), Redux_Helpers::cleanFilePath( trailingslashit( WP_CONTENT_DIR ) ) . '/uploads/', 'https://codex.wordpress.org/Editing_wp-config.php#WordPress_Upgrade_Constants' );
                    echo '</p></div><h2></h2>' . '</div>';
                }
            }

            function filesystem_init( $form_url, $method = '', $context = false, $fields = null ) {
                global $wp_filesystem;

                if ( ! empty( $this->creds ) ) {
                    return true;
                }

                ob_start();

                /* first attempt to get credentials */
                if ( false === ( $this->creds = request_filesystem_credentials( $form_url, $method, false, $context ) ) ) {
                    $this->creds            = array();
                    $this->parent->ftp_form = ob_get_contents();
                    ob_end_clean();

                    /**
                     * if we comes here - we don't have credentials
                     * so the request for them is displaying
                     * no need for further processing
                     **/

                    return false;
                }

                /* now we got some credentials - try to use them*/
                if ( ! WP_Filesystem( $this->creds ) ) {
                    $this->creds = array();
                    /* incorrect connection data - ask for credentials again, now with error message */
                    request_filesystem_credentials( $form_url, '', true, $context );
                    $this->parent->ftp_form = ob_get_contents();
                    ob_end_clean();

                    return false;
                }

                return true;
            }

            public static function load_direct() {
                if ( self::$direct === null ) {
                    require_once ABSPATH . '/wp-admin/includes/class-wp-filesystem-base.php';
                    require_once ABSPATH . '/wp-admin/includes/class-wp-filesystem-direct.php';
                    self::$direct = new WP_Filesystem_Direct( array() );
                }
            }

            public function execute( $action, $file = '', $params = '' ) {

                if ( empty( $this->parent->args ) ) {
                    return;
                }

                if ( ! empty ( $params ) ) {
                    extract( $params );
                }

                // Setup the filesystem with creds
                require_once ABSPATH . '/wp-admin/includes/template.php';
                require_once ABSPATH . '/wp-includes/pluggable.php';
                require_once ABSPATH . '/wp-admin/includes/file.php';

                if ( $this->parent->args['menu_type'] == 'submenu' ) {
                    $page_parent = $this->parent->args['page_parent'];
                    $base        = $page_parent . '?page=' . $this->parent->args['page_slug'];
                } else {
                    $base = 'admin.php?page=' . $this->parent->args['page_slug'];
                }

                $url = wp_nonce_url( $base, 'redux-options' );

                $this->filesystem_init( $url, 'direct', dirname( $file ) );

                if ( ! file_exists( ReduxFramework::$_upload_dir ) ) {
                    $this->do_action( 'mkdir', ReduxFramework::$_upload_dir );
                }

                $hash_path = trailingslashit( ReduxFramework::$_upload_dir ) . 'hash';
                if ( ! file_exists( $hash_path ) ) {
                    $this->do_action( 'put_contents', $hash_path, array(
                            'content' => md5( network_site_url() . '-' . $_SERVER['REMOTE_ADDR'] )
                        )
                    );
                }
                $version_path = trailingslashit( ReduxFramework::$_upload_dir ) . 'version';
                if ( ! file_exists( $version_path ) ) {
                    $this->do_action( 'put_contents', $version_path, array(
                            'content' => ReduxFramework::$_version
                        )
                    );
                }

                $index_path = trailingslashit( ReduxFramework::$_upload_dir ) . 'index.php';
                if ( ! file_exists( $index_path ) ) {
                    $this->do_action( 'put_contents', $index_path, array(
                        'content' => '<?php' . PHP_EOL . '// Silence is golden.'
                    ) );
                }

                return $this->do_action( $action, $file, $params );
            }

            public function do_action( $action, $file = '', $params = '' ) {

                if ( ! empty ( $params ) ) {
                    extract( $params );
                }

                global $wp_filesystem;

                if ( ! isset( $params['chmod'] ) || ( isset( $params['chmod'] ) && empty( $params['chmod'] ) ) ) {
                    if ( defined( 'FS_CHMOD_FILE' ) ) {
                        $chmod = FS_CHMOD_FILE;
                    } else {
                        $chmod = 0644;
                    }
                }
                $res = false;
                if ( ! isset( $recursive ) ) {
                    $recursive = false;
                }

                //$target_dir = $wp_filesystem->find_folder( dirname( $file ) );

                // Do unique stuff
                if ( $action == 'mkdir' ) {

                    if ( defined( 'FS_CHMOD_DIR' ) ) {
                        $chmod = FS_CHMOD_DIR;
                    } else {
                        $chmod = 0755;
                    }
                    $res = $wp_filesystem->mkdir( $file );
                    if ( ! $res ) {
                        wp_mkdir_p( $file );

                        $res = file_exists( $file );
                        if ( ! $res ) {
                            mkdir( $file, $chmod, true );
                            $res = file_exists( $file );
                        }
                    }
                    $index_path = trailingslashit( $file ) . 'index.php';
                    if ( ! file_exists( $index_path ) ) {
                        $wp_filesystem->put_contents(
                            $index_path,
                            '<?php' . PHP_EOL . '// Silence is golden.',
                            FS_CHMOD_FILE // predefined mode settings for WP files
                        );
                    }
                } elseif ( $action == 'rmdir' ) {
                    $res = $wp_filesystem->rmdir( $file, $recursive );
                } elseif ( $action == 'copy' && ! isset( $this->filesystem->killswitch ) ) {
                    if ( isset( $this->parent->ftp_form ) && ! empty( $this->parent->ftp_form ) ) {
                        $res = copy( $file, $destination );
                        if ( $res ) {
                            chmod( $destination, $chmod );
                        }
                    } else {
                        $res = $wp_filesystem->copy( $file, $destination, $overwrite, $chmod );
                    }
                } elseif ( $action == 'move' && ! isset( $this->filesystem->killswitch ) ) {
                    $res = $wp_filesystem->copy( $file, $destination, $overwrite );
                } elseif ( $action == 'delete' ) {
                    $res = $wp_filesystem->delete( $file, $recursive );
                } elseif ( $action == 'rmdir' ) {
                    $res = $wp_filesystem->rmdir( $file, $recursive );
                } elseif ( $action == 'dirlist' ) {
                    if ( ! isset( $include_hidden ) ) {
                        $include_hidden = true;
                    }
                    $res = $wp_filesystem->dirlist( $file, $include_hidden, $recursive );
                } elseif ( $action == 'put_contents' && ! isset( $this->filesystem->killswitch ) ) {
                    // Write a string to a file
                    if ( isset( $this->parent->ftp_form ) && ! empty( $this->parent->ftp_form ) ) {
                        self::load_direct();
                        $res = self::$direct->put_contents( $file, $content, $chmod );
                    } else {
                        $res = $wp_filesystem->put_contents( $file, $content, $chmod );
                    }
                } elseif ( $action == 'chown' ) {
                    // Changes file owner
                    if ( isset( $owner ) && ! empty( $owner ) ) {
                        $res = $wp_filesystem->chmod( $file, $chmod, $recursive );
                    }
                } elseif ( $action == 'owner' ) {
                    // Gets file owner
                    $res = $wp_filesystem->owner( $file );
                } elseif ( $action == 'chmod' ) {

                    if ( ! isset( $params['chmod'] ) || ( isset( $params['chmod'] ) && empty( $params['chmod'] ) ) ) {
                        $chmod = false;
                    }

                    $res = $wp_filesystem->chmod( $file, $chmod, $recursive );

                } elseif ( $action == 'get_contents' ) {
                    // Reads entire file into a string
                    if ( isset( $this->parent->ftp_form ) && ! empty( $this->parent->ftp_form ) ) {
                        self::load_direct();
                        $res = self::$direct->get_contents( $file );
                    } else {
                        $res = $wp_filesystem->get_contents( $file );
                    }
                } elseif ( $action == 'get_contents_array' ) {
                    // Reads entire file into an array
                    $res = $wp_filesystem->get_contents_array( $file );
                } elseif ( $action == 'object' ) {
                    $res = $wp_filesystem;
                } elseif ( $action == 'unzip' ) {
                    $unzipfile = unzip_file( $file, $destination );
                    if ( $unzipfile ) {
                        $res = true;
                    }
                }

                if ( ! $res ) {
                    if ( $action == 'dirlist' ) {
                        if ( empty( $res ) || $res == false || $res == '' ) {
                            return;
                        }

                        if ( is_array( $res ) && empty( $res ) ) {
                            return;
                        }

                        if ( ! is_array( $res ) ) {
                            if ( count( glob( "$file*" ) ) == 0 ) {
                                return;
                            }
                        }
                    }

                    $this->killswitch              = true;

                    $msg = '<strong>' . __( 'File Permission Issues', 'dina-kala' ) . '</strong><br/>' . sprintf( __( 'We were unable to modify required files. Please ensure that <code>%1s</code> has the proper read-write permissions, or modify your wp-config.php file to contain your FTP login credentials as <a href="%2s" target="_blank">outlined here</a>.', 'dina-kala' ), Redux_Helpers::cleanFilePath( trailingslashit( WP_CONTENT_DIR ) ) . '/uploads/', 'https://codex.wordpress.org/Editing_wp-config.php#WordPress_Upgrade_Constants' );

                    $data = array(
                        'parent'    => self::$instance->parent,
                        'type'      => 'error',
                        'msg'       => $msg,
                        'id'        => 'redux-wp-login',
                        'dismiss'   => false
                    );

                    Redux_Admin_Notices::set_notice($data);
                }

                return $res;
            }
        }

        Redux_Filesystem::get_instance();
    }
