<?php
/**
 * Term Meta module
 *
 * Version: 1.3.6
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
    die;
}

if ( ! class_exists( 'Cherry_X_Term_Meta' ) ) {

    /**
     * Term meta management module.
     */
    class Cherry_X_Term_Meta {

        /**
         * Module arguments.
         *
         * @var array
         */
        public $args = array();

        /**
         * Interface builder instance.
         *
         * @var object
         */
        public $builder = null;

        /**
         * Current nonce name to check.
         *
         * @var null
         */
        public $nonce = 'cherry-x-meta-nonce';

        /**
         * Storage of meta values.
         *
         * @since 1.0.0
         * @var   array
         */
        public $meta_values = array();

        /**
         * Constructor for the module.
         *
         * @since 1.0.0
         */
        public function __construct( $args = array() ) {

            $this->args = wp_parse_args( $args, array(
                'tax'        => 'category',
                'priority'   => 10,
                'builder_cb' => false,
                'fields'     => array(),
                'id'         => false,
            ) );

            if ( empty( $this->args['fields'] ) ) {
                return;
            }

            add_action( 'admin_enqueue_scripts', array( $this, 'init_builder' ), 0 );

            $priority = intval( $this->args['priority'] );
            $tax      = esc_attr( $this->args['tax'] );

            add_action( "{$tax}_add_form_fields", array( $this, 'render_add_fields' ), $priority );
            add_action( "{$tax}_edit_form_fields", array( $this, 'render_edit_fields' ), $priority, 2 );

            add_action( "created_{$tax}", array( $this, 'save_meta' ) );
            add_action( "edited_{$tax}", array( $this, 'save_meta' ) );

            $this->init_columns_actions();

        }

        /**
         * Initialize builder
         *
         * @return [type] [description]
         */
        public function init_builder( $hook ) {

            if ( ! in_array( $hook, array( 'edit-tags.php', 'term.php' ) ) ) {
                return;
            }

            $tax = $_GET['taxonomy'];

            if ( $tax !== $this->args['tax'] ) {
                return;
            }

            if ( ! isset( $this->args['builder_cb'] ) || ! is_callable( $this->args['builder_cb'] ) ) {
                return;
            }

            $this->builder = call_user_func( $this->args['builder_cb'] );

            if ( 'edit-tags.php' === $hook ) {
                $term = false;
            } else {
                $term = get_term( absint( $_GET['tag_ID'] ), $tax );
            }

            $this->get_fields( $term );
        }

        /**
         * Safely get attribute from field settings array.
         *
         * @since  1.0.0
         * @param  array            $field   arguments array.
         * @param  string|int|float $arg     argument key.
         * @param  mixed            $default default argument value.
         * @return mixed
         */
        public function get_arg( $field = array(), $arg = '', $default = '' ) {
            if ( is_array( $field ) && isset( $field[ $arg ] ) ) {
                return $field[ $arg ];
            }
            return $default;
        }

        /**
         * Get registered control fields
         *
         * @since  1.0.0
         * @param  mixed $term Current term object.
         * @return void
         */
        public function get_fields( $term ) {

            $zero_allowed = apply_filters(
                'cx_post_meta/zero_allowed_controls',
                array(
                    'stepper',
                    'slider',
                )
            );

            foreach ( $this->args['fields'] as $key => $field ) {

                $default = $this->get_arg( $field, 'value', '' );
                $value   = $this->get_meta( $term, $key, $default, $field );

                if ( isset( $field['options_callback'] ) ) {
                    $field['options'] = call_user_func( $field['options_callback'] );
                }

                $value = $this->prepare_field_value( $field, $value );

                $element        = $this->get_arg( $field, 'element', 'control' );
                $field['id']    = $this->get_arg( $field, 'id', $key );
                $field['name']  = $this->get_arg( $field, 'name', $key );
                $field['type']  = $this->get_arg( $field, 'type', '' );
                $field['value'] = $value;

                // Fix zero values for stepper and slider
                if ( ! $value && in_array( $field['type'], $zero_allowed ) ) {
                    $field['value'] = 0;
                }

                $register_callback = 'register_' . $element;

                if ( method_exists( $this->builder, $register_callback ) ) {
                    call_user_func( array( $this->builder, $register_callback ), $field );
                }
            }
        }

        /**
         * Prepare field value.
         *
         * @param array $field
         * @param mixed $value
         *
         * @return mixed
         */
        public function prepare_field_value( $field, $value ) {

            switch ( $field['type'] ) {
                case 'repeater':

                    if ( is_array( $value ) && ! empty( $field['fields'] ) ) {

                        $repeater_fields = $field['fields'];

                        foreach ( $value as $item_id => $item_value ) {
                            foreach ( $item_value as $repeater_field_id => $repeater_field_value ) {
                                $value[ $item_id ][ $repeater_field_id ] = $this->prepare_field_value( $repeater_fields[ $repeater_field_id ], $repeater_field_value );
                            }
                        }
                    }

                    break;

                case 'checkbox':

                    if ( ! empty( $field['is_array'] ) && ! empty( $field['options'] ) && ! empty( $value ) ) {

                        $adjusted = array();

                        if ( ! is_array( $value ) ) {
                            $value = array( $value );
                        }

                        foreach ( $value as $val ) {
                            $adjusted[ $val ] = 'true';
                        }

                        foreach ( $field['options'] as $opt_val => $opt_label ) {
                            if ( ! in_array( $opt_val, $value ) ) {
                                $adjusted[ $opt_val ] = 'false';
                            }
                        }

                        $value = $adjusted;
                    }

                    break;
            }

            return $value;
        }

        /**
         * Retrieve post meta field.
         *
         * @since  1.0.0
         *
         * @param  object $term    Current post object.
         * @param  string $key     The meta key to retrieve.
         * @param  mixed  $default Default value.
         * @param  array  $field   Meta field appropriate to current key.
         * @return string
         */
        public function get_meta( $term = null, $key = '', $default = false, $field = array() ) {

            if ( ! is_object( $term ) ) {
                return $default;
            }

            $meta = get_term_meta( $term->term_id, $key, false );

            if ( ! empty( $meta[0] ) && $this->to_timestamp( $field ) && is_numeric( $meta[0] ) ) {

                switch ( $field['input_type'] ) {
                    case 'date':
                        return gmdate( 'Y-m-d', $meta[0] );

                    case 'datetime-local':
                        return gmdate( 'Y-m-d\TH:i', $meta[0] );
                }

            }

            return ( empty( $meta ) ) ? $default : $meta[0];
        }

        /**
         * Render add term form fields
         *
         * @since  1.0.0
         * @param  [type] $taxonomy taxonomy name.
         * @return void
         */
        public function render_add_fields( $taxonomy ) {

            echo '<div style="padding:10px 0;" class="lakit-tax-metaboxes '.esc_attr($this->args['id']).'">';
            $this->render_fields();
            echo '</div>';

        }

        /**
         * Render edit term form fields
         *
         * @since  1.0.0
         * @param  object $term     current term object.
         * @param  [type] $taxonomy taxonomy name.
         * @return void
         */
        public function render_edit_fields( $term, $taxonomy ) {

            echo '<tr class="form-field cherry-term-meta-wrap lakit-tax-metaboxes '. esc_attr($this->args['id']) .'"><th>&nbsp;</th><td>';
            $this->render_fields();
            echo '</td></tr>';

        }

        /**
         * Render metabox funciton
         *
         * @since  1.0.0
         * @param  object $post    The post object currently being edited.
         * @param  array  $metabox Specific information about the meta box being loaded.
         * @return void
         */
        public function render_fields() {

            if ( ! $this->builder ) {
                return;
            }

            /**
             * Hook fires before metabox output started.
             */
            do_action( 'cx_term_meta/meta_box/before', $this->args );

            $this->builder->render();

            /**
             * Hook fires after metabox output finished.
             */
            do_action( 'cx_term_meta/meta_box/after', $this->args );

        }

        /**
         * Save additional taxonomy meta on edit or create tax
         *
         * @since  1.0.0
         * @param  int $term_id Term ID.
         * @return bool
         */
        public function save_meta( $term_id ) {

            if ( ! current_user_can( 'edit_term', $term_id ) ) {
                return false;
            }

            /**
             * Hook on before current metabox saving for all meta boxes
             */
            do_action( 'cx_term_meta/before_save', $term_id );

            foreach ( $this->args['fields'] as $key => $field ) {

                if ( ! isset( $_POST[ $key ] ) ) {

                    // Specific key will be deleted only on `editedtag` page
                    if ( ! empty( $_POST['action'] ) && 'editedtag' === $_POST['action'] ) {
                        update_term_meta( $term_id, $key, false );
                    }

                    continue;
                }

                if ( $this->to_timestamp( $field ) ) {
                    $new_val = strtotime( $_POST[ $key ] );
                } else {
                    $new_val = $this->sanitize_meta( $field, $_POST[ $key ] );
                }

                /**
                 * Hook on before current metabox saving with meta box id as dynamic part
                 */
                do_action( 'cx_term_meta/before_save_meta/' . $key, $term_id, $new_val );

                update_term_meta( $term_id, $key, $new_val );

            }

            /**
             * Hook on after current metabox saving for all meta boxes
             */
            do_action( 'cx_term_meta/after_save', $term_id );

            return true;

        }

        /**
         * Is date field
         *
         * @param  array   $field Field arguments
         * @return boolean
         */
        public function to_timestamp( $field ) {

            if ( empty( $field['input_type'] ) ) {
                return false;
            }

            if ( empty( $field['is_timestamp'] ) ) {
                return false;
            }

            if ( ! in_array( $field['input_type'], array( 'date', 'datetime-local' ) ) ) {
                return false;
            }

            return ( true === $field['is_timestamp'] );

        }

        /**
         * Sanitize passed meta value
         *
         * @param  array $field Meta field to sanitize.
         * @param  mixed $value Meta value.
         * @return mixed
         */
        public function sanitize_meta( $field, $value ) {

            if ( 'repeater' === $field['type'] && ! empty( $field['fields'] ) && is_array( $value ) ) {
                $repeater_fields = $field['fields'];

                foreach ( $value as $item_id => $item_value ) {
                    foreach ( $item_value as $repeater_field_id => $repeater_field_value ) {
                        $value[ $item_id ][ $repeater_field_id ] = $this->sanitize_meta( $repeater_fields[ $repeater_field_id ], $repeater_field_value );
                    }
                }
            }

            if ( 'checkbox' === $field['type'] && ! empty( $field['is_array'] ) ) {
                $raw    = ! empty( $value ) ? $value : array();
                $result = array();

                if ( is_array( $raw ) ) {
                    foreach ( $raw as $raw_key => $raw_value ) {
                        $bool_value = filter_var( $raw_value, FILTER_VALIDATE_BOOLEAN );
                        if ( $bool_value ) {
                            $result[] = $raw_key;
                        }
                    }
                }

                return $result;
            }

            if ( ! empty( $field['sanitize_callback'] ) && is_callable( $field['sanitize_callback'] ) ) {
                $key = ! empty( $field['name'] ) ? $field['name'] : null;
                return call_user_func( $field['sanitize_callback'], $value, $key, $field );
            }

            return is_array( $value ) ? $value : esc_attr( $value );
        }

        /**
         * Initalize admin columns
         *
         * @return void
         */
        public function init_columns_actions() {

            if ( empty( $this->args['admin_columns'] ) ) {
                return;
            }

            $tax      = esc_attr( $this->args['tax'] );

            add_filter( 'manage_edit-' . $tax . '_columns', array( $this, 'edit_columns' ) );
            add_action( 'manage_' . $tax . '_custom_column', array( $this, 'manage_columns' ), 10, 3 );
        }

        /**
         * Edit admin columns
         *
         * @since  2.0.0
         * @param  array $columns current post table columns.
         * @return array
         */
        public function edit_columns( $columns ) {

            foreach ( $this->args['admin_columns'] as $column_key => $column_data ) {

                if ( empty( $column_data['label'] ) ) {
                    continue;
                }

                if ( ! empty( $column_data['position'] ) && 0 !== (int) $column_data['position'] ) {

                    $length = count( $columns );

                    if ( (int) $column_data['position'] > $length ) {
                        $columns[ $column_key ] = $column_data['label'];
                    }

                    $columns_before = array_slice( $columns, 0, (int) $column_data['position'] );
                    $columns_after  = array_slice( $columns, (int) $column_data['position'], $length - (int) $column_data['position'] );

                    $columns = array_merge(
                        $columns_before,
                        array(
                            $column_key => $column_data['label'],
                        ),
                        $columns_after
                    );
                } else {
                    $columns[ $column_key ] = $column_data['label'];
                }
            }

            return $columns;

        }

        /**
         * Add output for custom columns.
         *
         * @since  2.0.0
         * @param  string $output  html output.
         * @param  string $column  current column id.
         * @param  int    $term_id current term ID.
         * @return string
         */
        public function manage_columns( $output, $column, $term_id ) {

            if ( empty( $this->args['admin_columns'][ $column ] ) ) {
                return $output;
            }

            if ( ! empty( $this->args['admin_columns'][ $column ]['callback'] ) && is_callable( $this->args['admin_columns'][ $column ]['callback'] ) ) {
                $tmp = call_user_func( $this->args['admin_columns'][ $column ]['callback'], $column, $term_id );
            }
            else {
                $tmp = get_term_meta( $term_id, $column, true );
            }

            return $output . $tmp;

        }

    }
}