<?php
namespace um\core;

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) exit;

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

        public $form_suffix;
        var $form_id;

        function __construct() {

            $this->post_form = null;

            $this->form_suffix = null;

            $this->errors = null;

            $this->processing = null;

            add_action('template_redirect', array(&$this, 'form_init'), 2);

            add_action('init', array(&$this, 'field_declare'), 10);

        }


        function ajax_muted_action() {
            extract( $_REQUEST );

            if ( ! UM()->roles()->um_current_user_can( 'edit', $user_id ) )
                die( __( 'You can not edit this user' ) );

            switch( $hook ) {
                default:
                    do_action( "um_run_ajax_function__{$hook}", $_REQUEST );
                    break;
            }
        }


        function ajax_select_options() {

            $arr_options = array();
            $arr_options['status'] = 'success';
            $arr_options['post'] = $_POST;

            UM()->fields()->set_id = intval( $_POST['form_id'] );
            UM()->fields()->set_mode  = 'profile';
            $form_fields = UM()->fields()->get_fields();
            $arr_options['fields'] = $form_fields;

            $debug = apply_filters('um_ajax_select_options__debug_mode', false );
            if( $debug ){
                $arr_options['debug'] = array(
                    $_POST,
                    $form_fields,
                );
            }

            if( isset( $_POST['child_callback'] ) && ! empty( $_POST['child_callback'] ) && isset( $form_fields[ $_POST['child_name'] ] )  ){

                $ajax_source_func = $_POST['child_callback'];

                // If the requested callback function is added in the form or added in the field option, execute it with call_user_func.
                if( isset( $form_fields[ $_POST['child_name'] ]['custom_dropdown_options_source'] ) &&
                    ! empty( $form_fields[ $_POST['child_name'] ]['custom_dropdown_options_source'] ) &&
                    $form_fields[ $_POST['child_name'] ]['custom_dropdown_options_source'] == $ajax_source_func ){

                    $arr_options['field'] = $form_fields[ $_POST['child_name'] ];
                    if( function_exists( $ajax_source_func ) ){
                        $arr_options['items'] = call_user_func( $ajax_source_func, $arr_options['field']['parent_dropdown_relationship']  );
                    }

                }else{
                    $arr_options['status'] = 'error';
                    $arr_options['message'] = __( 'This is not possible for security reasons.','ultimate-member');
                }

            }

            wp_send_json( $arr_options );
        }


        /**
         * Count the form errors.
         * @return integer
         */
        function count_errors() {
            $errors = $this->errors;

            if( $errors && is_array( $errors ) ) {
                return count( $errors );
            }

            return 0;
        }


        /**
         * Appends field errors
         * @param string $key
         * @param string $error
         */
        function add_error( $key, $error ) {
            if ( ! isset( $this->errors[ $key ] ) ){

                $error = apply_filters('um_submit_form_error', $error , $key );

                $this->errors[ $key ] = $error;
            }
        }


        /**
         * If a form has errors
         * @param  string  $key
         * @return boolean
         */
        function has_error( $key ) {
            if ( isset( $this->errors[$key] ) )
                return true;
            return false;
        }


        /**
         * Declare all fields
         */
        function field_declare(){
            if ( isset( UM()->builtin()->custom_fields ) ) {
                $this->all_fields = UM()->builtin()->custom_fields;
            } else {
                $this->all_fields = null;
            }
        }


        /**
         * Validate form
         */
        function form_init() {
            if ( isset( $_SERVER['REQUEST_METHOD'] ) ) {
                $http_post = ('POST' == $_SERVER['REQUEST_METHOD']);
            } else {
                $http_post = 'POST';
            }

            if ( $http_post && ! is_admin() && isset( $_POST['form_id'] ) && is_numeric( $_POST['form_id'] ) ) {

                do_action( "um_before_submit_form_post", $_POST );

                $this->form_id = $_POST['form_id'];
                $this->form_status = get_post_status( $this->form_id );


                if ( $this->form_status == 'publish' ) {

                    /* save entire form as global */
                    $this->post_form = apply_filters('um_submit_post_form' ,$_POST );

                    $this->post_form = $this->beautify( $this->post_form );

                    $this->form_data = UM()->query()->post_data( $this->form_id );

                    $this->post_form['submitted'] = $this->post_form;

                    $this->post_form = array_merge( $this->form_data, $this->post_form );

                    if ( isset( $this->form_data['custom_fields'] )  && strstr( $this->form_data['custom_fields'], 'role_' )  ) {  // Secure selected role

                        $custom_field_roles = $this->custom_field_roles( $this->form_data['custom_fields'] );

                        if ( ! empty( $_POST['role'] ) ) {
                            $role = $_POST['role'];

                            if( is_array( $_POST['role'] ) ){
                                $role = current( $_POST['role'] );
                            }

	                        global $wp_roles;
	                        $role_keys = array_map( function( $item ) {
		                        return 'um_' . $item;
	                        }, get_option( 'um_roles' ) );
	                        $exclude_roles = array_diff( array_keys( $wp_roles->roles ), array_merge( $role_keys, array( 'subscriber' ) ) );

                            if ( ! empty( $role ) &&
	                             ( ! in_array( $role , $custom_field_roles ) || in_array( $role , $exclude_roles ) ) ) {
                                wp_die( __( 'This is not possible for security reasons.','ultimate-member') );
                            }

                            $this->post_form['role'] = $role;
                            $this->post_form['submitted']['role'] = $role;
                        }

                    } elseif ( isset( $this->post_form['mode'] ) && $this->post_form['mode'] == 'register' ) {
                        $role = $this->assigned_role( $this->form_id );
                        $this->post_form['role'] = $role;
                        $this->post_form['submitted']['role'] = $role;
                    }

                    if ( isset( $_POST[ UM()->honeypot ] ) && $_POST[ UM()->honeypot ] != '' ){
                        wp_die( 'Hello, spam bot!', 'ultimate-member' );
                    }

                    if ( ! in_array( $this->form_data['mode'], array( 'login' ) ) ) {

                        $form_timestamp  = trim($_POST['timestamp']);
                        $live_timestamp  = current_time( 'timestamp' );

                        if ( $form_timestamp == '' && um_get_option('enable_timebot') == 1 )
                            wp_die( __('Hello, spam bot!','ultimate-member') );

                        if ( !current_user_can('manage_options') && $live_timestamp - $form_timestamp < 6 && um_get_option('enable_timebot') == 1  )
                            wp_die( __('Whoa, slow down! You\'re seeing this message because you tried to submit a form too fast and we think you might be a spam bot. If you are a real human being please wait a few seconds before submitting the form. Thanks!','ultimate-member') );

                    }

                    $this->post_form = apply_filters( 'um_submit_form_data', $this->post_form, $this->post_form['mode'] );

                    /* Continue based on form mode - pre-validation */

                    do_action( 'um_submit_form_errors_hook', $this->post_form );

                    do_action( "um_submit_form_{$this->post_form['mode']}", $this->post_form );

                }

            }

        }


        /**
         * Beautify form data
         * @param  array $form
         * @return array $form
         */
        function beautify( $form ){

            if (isset($form['form_id'])){

                $this->form_suffix = '-' . $form['form_id'];

                $this->processing = $form['form_id'];

                foreach( $form as $key => $value ){
                    if ( strstr( $key, $this->form_suffix ) ) {
                        $a_key = str_replace( $this->form_suffix, '', $key );
                        $form[ $a_key ] = $value;
                        unset( $form[ $key ] );
                    }
                }

            }

            return $form;
        }


        /**
         * Display form type as Title
         * @param  string $mode
         * @param  integer $post_id
         * @return string $output
         */
        function display_form_type( $mode, $post_id ){
            $output = null;
            switch( $mode ){
                case 'login':
                    $output = 'Login';
                    break;
                case 'profile':
                    $output = 'Profile';
                    break;
                case 'register':
                    $output = 'Register';
                    break;
            }
            return $output;
        }

        /**
         * Assigned roles to a form
         * @param  integer $post_id
         * @return string $role
         */
        function assigned_role( $post_id ) {

            $global_role = get_option( 'default_role' ); // WP Global settings

            $um_global_role = um_get_option( 'register_role' ); // UM Settings Global settings
            if ( ! empty( $um_global_role ) )
                $global_role = $um_global_role; // Form Global settings


            $mode = $this->form_type( $post_id );
            $use_custom = get_post_meta( $post_id, "_um_{$mode}_use_custom_settings", true );
            if ( $use_custom ) { // Custom Form settings
                $role = get_post_meta( $post_id, "_um_{$mode}_role", true );
            }

            if ( empty( $role ) ) { // custom role is default, return default role's slug
                $role = $global_role;
            }

            return $role;
        }

        /**
         * Get form type
         * @param  integer $post_id
         * @return string
         */
        function form_type( $post_id ){

            $mode = get_post_meta( $post_id, '_um_mode', true );

            return $mode;
        }

        /**
         * Get custom field roles
         * @param  string $custom_fields serialized
         * @return bool|array roles
         */
        function custom_field_roles( $custom_fields ) {

            $fields = maybe_unserialize( $custom_fields );

            if ( ! is_array( $fields )  )
                return false;

            foreach ( $fields as $field_key => $field_settings ) {

                if ( strstr( $field_key , 'role_' ) ) {
                    if ( is_array( $field_settings['options'] ) ) {
                        return array_keys( $field_settings['options'] );
                    }
                }

            }

            return false;
        }
    }
}