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<?php
/**
 * Shortcode class
 *
 * @package   PUM
 * @copyright Copyright (c) 2023, Code Atlantic LLC
 */

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

/**
 * Class PUM_Shortcode
 *
 * This is a base class for all popup maker & extension shortcodes.
 */
abstract class PUM_Shortcode {

/**
	 * Per instance version for compatibility fixes.
	 *
	 * @var int
	 */
	public $version = 1;

/**
	 * Used to force ajax rendering of the shortcode.
	 *
	 * @var bool
	 */
	public $ajax_rendering = false;

/**
	 * Shortcode supports inner content.
	 *
	 * @var bool
	 */
	public $has_content = false;

/**
	 * Section/Tab where the content editor will be placed.
	 *
	 * @var string
	 */
	public $inner_content_section = 'general';

/**
	 * Field priority of the content editor.
	 *
	 * @var int
	 */
	public $inner_content_priority = 5;

/**
	 * @deprecated 1.7.0
	 * @var string
	 */
	public $field_prefix = 'attrs';

/**
	 * @deprecated 1.7.0
	 * @var string
	 */
	public $field_name_format = '{$prefix}[{$field}]';

/**
	 * Current version used for compatibility fixes.
	 *
	 * @var int
	 */
	public $current_version = 2;

/**
	 * Class constructor will set the needed filter and action hooks
	 *
	 * @param array $args
	 */
	public function __construct( $args = [] ) {
		if ( ! did_action( 'init' ) ) {
			add_action( 'init', [ $this, 'register' ] );
		} elseif ( ! did_action( 'admin_head' ) && current_action() !== 'init' ) {
			add_action( 'admin_head', [ $this, 'register' ] );
		} else {
			$this->register();
		}
	}

/**
	 * Register this shortcode with Shortcode UI & Shortcake.
	 */
	public function register() {
		add_shortcode( $this->tag(), [ $this, 'handler' ] );
		add_action( 'print_media_templates', [ $this, 'render_template' ] );
		add_action( 'register_shortcode_ui', [ $this, 'register_shortcode_ui' ] );

PUM_Shortcodes::instance()->add_shortcode( $this );
	}

/**
	 * The shortcode tag.
	 */
	abstract public function tag();

/**
	 * @return mixed
	 */
	public static function init() {
		$class = get_called_class();
		return new $class();
	}

/**
	 * Shortcode handler
	 *
	 * @param  array  $atts    shortcode attributes
	 * @param  string $content shortcode content
	 *
	 * @return string
	 */
	abstract public function handler( $atts, $content = null );

public function _tabs() {
		$tabs = $this->version < 2 && method_exists( $this, 'sections' ) ? $this->sections() : $this->tabs();

return apply_filters( 'pum_shortcode_tabs', $tabs, $this->tag() );
	}

public function _subtabs() {
		$subtabs = $this->version >= 2 && method_exists( $this, 'subtabs' ) ? $this->subtabs() : false;

foreach ( $this->_tabs() as $tab_id => $tab_label ) {
			if ( empty( $subtabs[ $tab_id ] ) || ! is_array( $subtabs[ $tab_id ] ) ) {
				$subtabs[ $tab_id ] = [
					'main' => $tab_label,
				];
			}
		}

return apply_filters( 'pum_shortcode_subtabs', $subtabs, $this->tag() );
	}

/**
	 * Sections.
	 *
	 * @deprecated 1.7.0 Use $this->tabs() instead.
	 *
	 * @todo       Once all shortcodes are v2+ remove $this->sections()
	 *
	 * @return array
	 */
	public function sections() {
		return [
			'general' => __( 'General', 'popup-maker' ),
			'options' => __( 'Options', 'popup-maker' ),
		];
	}

/**
	 * Returns a list of tabs for this shortcodes editor.
	 *
	 * @return array
	 */
	public function tabs() {
		return [
			'general' => __( 'General', 'popup-maker' ),
			'options' => __( 'Options', 'popup-maker' ),
		];
	}

/**
	 * Returns a list of tabs for this shortcodes editor.
	 *
	 * @return array
	 */
	public function subtabs() {
		return [
			'general' => [
				'main' => __( 'General', 'popup-maker' ),
			],
			'options' => [
				'main' => __( 'Options', 'popup-maker' ),
			],
		];
	}

/**
	 * Gets preprocessed shortcode attributes.
	 *
	 * @param $atts
	 *
	 * @return array
	 */
	public function shortcode_atts( $atts ) {
		if ( ! is_array( $atts ) ) {
			$atts = [];
		}

foreach ( $atts  as $key => $value ) {
			/**
			 * Fix for truthy & value-less arguments such as [shortcode argument]
			 */
			if ( is_int( $key ) ) {
				unset( $atts[ $key ] );
				$atts[ $value ] = true;
			}
		}

return shortcode_atts( $this->defaults(), $atts, $this->tag() );
	}

/**
	 * Array of default attribute values.
	 *
	 * @todo Convert this to pull from the std of $this->fields.
	 *
	 * @return array
	 */
	public function defaults() {
		$defaults = [];

$fields = PUM_Admin_Helpers::flatten_fields_array( $this->fields() );

foreach ( $fields as $key => $field ) {
			$defaults[ $key ] = isset( $field['std'] ) ? $field['std'] : null;
		}

return apply_filters( 'pum_shortcode_defaults', $defaults, $this );
	}

/**
	 * Render the template based on shortcode classes methods.
	 */
	public function render_template() {
		if ( $this->version >= 2 && $this->get_template() !== false ) {
			echo '<script type="text/html" id="tmpl-pum-shortcode-view-' . $this->tag() . '">';
			$this->style_block();
			$this->template();
			echo '</script>';
		} else {
			/** @deprecated, here in case shortcode doesn't yet have the new $this->template() method. */
			$this->_template();
		}
	}

/**
	 * Returns the inner contents of the JS templates.
	 *
	 * @todo Once all shortcodes have been updated to use template over _template make this abstract.
	 *
	 * @return bool|string
	 */
	public function template() {
		return false;
	}

/**
	 * Render the template based on shortcode classes methods.
	 */
	public function style_block() {
		$styles = $this->get_template_styles();

if ( false !== $styles ) {
			echo '<style>' . $styles . '</style>';
		}
	}

/**
	 * @deprecated 1.7.0 Use template() instead.
	 */
	public function _template() {
	}

/**
	 * Render the template based on shortcode classes methods.
	 *
	 * @return string|false
	 */
	public function get_template_styles() {

ob_start();

$this->template_styles();

/**  $this->_template_styles() is @deprecated and here in case shortcode doesn't yet have the new $this->template() method. */
		echo $this->_template_styles();

$styles = ob_get_clean();

return ! empty( $styles ) ? $styles : false;
	}

/**
	 * Returns the styles for inner contents of the JS templates.
	 *
	 * @todo Once all shortcodes have been updated to use template over _template make this abstract.
	 */
	public function template_styles() {}

/**
	 * @deprecated 1.7.0 use template_styles() instead.
	 *
	 * @return string
	 */
	public function _template_styles() {
		return '';
	}

$this->template();

$template = ob_get_clean();

return ! empty( $template ) ? $template : false;
	}

/**
	 * Register this shortcode in shortcake ui.
	 */
	public function register_shortcode_ui() {

if ( ! is_admin() || ! function_exists( 'shortcode_ui_register_for_shortcode' ) ) {
			return;
		}

$shortcode_ui_args = [
			'label'         => $this->label(),
			'listItemImage' => $this->icon(),
			'post_type'     => apply_filters( 'pum_shortcode_post_types', $this->post_types(), $this ),
			'attrs'         => [],
		];

/**
		 * Register UI for the "inner content" of the shortcode. Optional.
		 * If no UI is registered for the inner content, then any inner content
		 * data present will be backed up during editing.
		 */
		if ( $this->has_content ) {
			$shortcode_ui_args['inner_content'] = $this->inner_content_labels();
		}

$fields = PUM_Admin_Helpers::flatten_fields_array( $this->_fields() );

if ( count( $fields ) ) {
			foreach ( $fields as $field_id => $field ) {

// Don't register inner content fields.
				if ( '_inner_content' === $field_id ) {
					continue;
				}

// text, checkbox, textarea, radio, select, email, url, number, date, attachment, color, post_select
				switch ( $field['type'] ) {
					case 'select':
						$shortcode_ui_args['attrs'][] = [
							'label'   => esc_html( $field['label'] ),
							'attr'    => $field_id,
							'type'    => 'select',
							'options' => $field['options'],
						];
						break;

case 'postselect':
					case 'objectselect':
						if ( empty( $field['post_type'] ) ) {
							break;
						}
						$shortcode_ui_args['attrs'][] = [
							'label'   => esc_html( $field['label'] ),
							'attr'    => $field_id,
							'type'    => 'post_select',
							'options' => isset( $field['options'] ) ? $field['options'] : [],
							'query'   => [ 'post_type' => $field['post_type'] ],
						];
						break;

case 'taxonomyselect':
						break;

case 'text';
					default:
						$shortcode_ui_args['attrs'][] = [
							'label' => $field['label'],
							'attr'  => $field_id,
							'type'  => 'text',
							'value' => ! empty( $field['std'] ) ? $field['std'] : '',
							// 'encode' => true,
							'meta'  => [
								'placeholder' => $field['placeholder'],
							],
						];
						break;
				}
			}
		}

/**
		 * Register UI for your shortcode
		 *
		 * @param string $shortcode_tag
		 * @param array  $ui_args
		 */
		shortcode_ui_register_for_shortcode( $this->tag(), $shortcode_ui_args );
	}

/**
	 * How the shortcode should be labeled in the UI. Required argument.
	 *
	 * @return string
	 */
	abstract public function label();

/**
	 * Include an icon with your shortcode. Optional.
	 * Use a dashicon, or full URL to image.
	 *
	 * Only used by Shortcake
	 *
	 * @return string
	 */
	public function icon() {
		return 'dashicons-editor-quote';
	}

/**
	 * Limit this shortcode UI to specific post_types. Optional.
	 *
	 * @return array
	 */
	public function post_types() {
		return [ 'post', 'page', 'popup' ];
	}

/**
	 * @todo Remove the inner function calls and just have this function define them directly.
	 *
	 * @return array
	 */
	public function inner_content_labels() {
		return [
			'label'       => $this->label(),
			'description' => $this->description(),
		];
	}

/**
	 * Used internally to merge the  inner content field with existing fields.
	 *
	 * @return array
	 */
	public function _fields() {
		$fields = apply_filters( 'pum_shortcode_fields', $this->fields(), $this );

if ( $this->has_content ) {
			$inner_content_labels = $this->inner_content_labels();

$fields[ $this->inner_content_section ]['main']['_inner_content'] = [
				'label'    => $inner_content_labels['label'],
				'desc'     => $inner_content_labels['description'],
				'section'  => $this->inner_content_section,
				'type'     => 'textarea',
				'priority' => $this->inner_content_priority,
			];
		}

$fields = PUM_Admin_Helpers::parse_tab_fields(
			$fields,
			[
				'has_subtabs' => $this->version >= 2,
				'name'        => 'attrs[%s]',
			]
		);

if ( $this->version < 2 ) {
			foreach ( $fields as $tab_id => $tab_fields ) {
				foreach ( $tab_fields as $field_id => $field ) {
					/**
					 * Apply field compatibility fixes for shortcodes still on v1.
					 */
					if ( ! empty( $field['type'] ) && in_array( $field['type'], [ 'select', 'postselect', 'radio', 'multicheck' ] ) ) {
						$fields[ $tab_id ][ $field_id ]['options'] = ! empty( $field['options'] ) ? array_flip( $field['options'] ) : [];
					}
				}
			}
		}

return $fields;
	}

/**
	 * @return string
	 */
	abstract public function description();

/**
	 * Array of fields by tab.
	 *
	 * @return array
	 */
	abstract public function fields();

}