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<?php
namespace Elementor\TemplateLibrary;

use Elementor\Api;
use Elementor\Core\Common\Modules\Connect\Module as ConnectModule;
use Elementor\Plugin;

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

/**
 * Elementor template library remote source.
 *
 * Elementor template library remote source handler class is responsible for
 * handling remote templates from Elementor.com servers.
 *
 * @since 1.0.0
 */
class Source_Remote extends Source_Base {

const API_TEMPLATES_URL = 'https://my.elementor.com/api/connect/v1/library/templates';

const TEMPLATES_DATA_TRANSIENT_KEY_PREFIX = 'elementor_remote_templates_data_';

public function __construct() {
		parent::__construct();

$this->add_actions();
	}

public function add_actions() {
		add_action( 'elementor/experiments/feature-state-change/container', [ $this, 'clear_cache' ], 10, 0 );
	}

/**
	 * Get remote template ID.
	 *
	 * Retrieve the remote template ID.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return string The remote template ID.
	 */
	public function get_id() {
		return 'remote';
	}

/**
	 * Get remote template title.
	 *
	 * Retrieve the remote template title.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return string The remote template title.
	 */
	public function get_title() {
		return esc_html__( 'Remote', 'elementor' );
	}

/**
	 * Register remote template data.
	 *
	 * Used to register custom template data like a post type, a taxonomy or any
	 * other data.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function register_data() {}

/**
	 * Get remote templates.
	 *
	 * Retrieve remote templates from Elementor.com servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param array $args Optional. Not used in remote source.
	 *
	 * @return array Remote templates.
	 */
	public function get_items( $args = [] ) {
		$force_update = ! empty( $args['force_update'] ) && is_bool( $args['force_update'] );

$templates_data = $this->get_templates_data( $force_update );

$templates = [];

foreach ( $templates_data as $template_data ) {
			$templates[] = $this->prepare_template( $template_data );
		}

return $templates;
	}

/**
	 * Get remote template.
	 *
	 * Retrieve a single remote template from Elementor.com servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param int $template_id The template ID.
	 *
	 * @return array Remote template.
	 */
	public function get_item( $template_id ) {
		$templates = $this->get_items();

return $templates[ $template_id ];
	}

/**
	 * Save remote template.
	 *
	 * Remote template from Elementor.com servers cannot be saved on the
	 * database as they are retrieved from remote servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param array $template_data Remote template data.
	 *
	 * @return \WP_Error
	 */
	public function save_item( $template_data ) {
		return new \WP_Error( 'invalid_request', 'Cannot save template to a remote source' );
	}

/**
	 * Update remote template.
	 *
	 * Remote template from Elementor.com servers cannot be updated on the
	 * database as they are retrieved from remote servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param array $new_data New template data.
	 *
	 * @return \WP_Error
	 */
	public function update_item( $new_data ) {
		return new \WP_Error( 'invalid_request', 'Cannot update template to a remote source' );
	}

/**
	 * Delete remote template.
	 *
	 * Remote template from Elementor.com servers cannot be deleted from the
	 * database as they are retrieved from remote servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param int $template_id The template ID.
	 *
	 * @return \WP_Error
	 */
	public function delete_template( $template_id ) {
		return new \WP_Error( 'invalid_request', 'Cannot delete template from a remote source' );
	}

/**
	 * Export remote template.
	 *
	 * Remote template from Elementor.com servers cannot be exported from the
	 * database as they are retrieved from remote servers.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param int $template_id The template ID.
	 *
	 * @return \WP_Error
	 */
	public function export_template( $template_id ) {
		return new \WP_Error( 'invalid_request', 'Cannot export template from a remote source' );
	}

/**
	 * Get remote template data.
	 *
	 * Retrieve the data of a single remote template from Elementor.com servers.
	 *
	 * @since 1.5.0
	 * @access public
	 *
	 * @param array  $args    Custom template arguments.
	 * @param string $context Optional. The context. Default is `display`.
	 *
	 * @return array|\WP_Error Remote Template data.
	 */
	public function get_data( array $args, $context = 'display' ) {
		$data = Api::get_template_content( $args['template_id'] );

if ( is_wp_error( $data ) ) {
			return $data;
		}

// Set the Request's state as an Elementor upload request, in order to support unfiltered file uploads.
		Plugin::$instance->uploads_manager->set_elementor_upload_state( true );

// BC.
		$data = (array) $data;

$data['content'] = $this->replace_elements_ids( $data['content'] );
		$data['content'] = $this->process_export_import_content( $data['content'], 'on_import' );

$post_id = $args['editor_post_id'];
		$document = Plugin::$instance->documents->get( $post_id );
		if ( $document ) {
			$data['content'] = $document->get_elements_raw_data( $data['content'], true );
		}

// After the upload complete, set the elementor upload state back to false
		Plugin::$instance->uploads_manager->set_elementor_upload_state( false );

return $data;
	}

/**
	 * Get templates data from a transient or from a remote request.
	 * In any of the following 2 conditions, the remote request will be triggered:
	 * 1. Force update - "$force_update = true" parameter was passed.
	 * 2. The data saved in the transient is empty or not exist.
	 *
	 * @param bool $force_update
	 * @return array
	 */
	private function get_templates_data( bool $force_update ) : array {
		$templates_data_cache_key = static::TEMPLATES_DATA_TRANSIENT_KEY_PREFIX . ELEMENTOR_VERSION;

$experiments_manager = Plugin::$instance->experiments;
		$editor_layout_type = $experiments_manager->is_feature_active( 'container' ) ? 'container_flexbox' : '';

if ( $force_update ) {
			return $this->get_templates( $editor_layout_type );
		}

$templates_data = get_transient( $templates_data_cache_key );

if ( empty( $templates_data ) ) {
			return $this->get_templates( $editor_layout_type );
		}

return $templates_data;
	}

/**
	 * Get the templates from a remote server and set a transient.
	 *
	 * @param string $editor_layout_type
	 * @return array
	 */
	private function get_templates( string $editor_layout_type ): array {
		$templates_data_cache_key = static::TEMPLATES_DATA_TRANSIENT_KEY_PREFIX . ELEMENTOR_VERSION;

$templates_data = $this->get_templates_remotely( $editor_layout_type );

if ( empty( $templates_data ) ) {
			return [];
		}

set_transient( $templates_data_cache_key, $templates_data, 12 * HOUR_IN_SECONDS );

return $templates_data;
	}

/**
	 * Fetch templates from the remote server.
	 *
	 * @param string $editor_layout_type
	 * @return array|false
	 */
	private function get_templates_remotely( string $editor_layout_type ) {
		$response = wp_remote_get( static::API_TEMPLATES_URL, [
			'body' => [
				'plugin_version' => ELEMENTOR_VERSION,
				'editor_layout_type' => $editor_layout_type,
			],
		] );

if ( is_wp_error( $response ) || 200 !== (int) wp_remote_retrieve_response_code( $response ) ) {
			return false;
		}

$templates_data = json_decode( wp_remote_retrieve_body( $response ), true );

if ( empty( $templates_data ) || ! is_array( $templates_data ) ) {
			return [];
		}

return $templates_data;
	}

/**
	 * @since 2.2.0
	 * @access private
	 */
	private function prepare_template( array $template_data ) {
		$favorite_templates = $this->get_user_meta( 'favorites' );

// BC: Support legacy APIs that don't have access tiers.
		if ( isset( $template_data['access_tier'] ) ) {
			$access_tier = $template_data['access_tier'];
		} else {
			$access_tier = 0 === $template_data['access_level']
				? ConnectModule::ACCESS_TIER_FREE
				: ConnectModule::ACCESS_TIER_ESSENTIAL;
		}

return [
			'template_id' => $template_data['id'],
			'source' => $this->get_id(),
			'type' => $template_data['type'],
			'subtype' => $template_data['subtype'],
			'title' => $template_data['title'],
			'thumbnail' => $template_data['thumbnail'],
			'date' => $template_data['tmpl_created'],
			'author' => $template_data['author'],
			'tags' => json_decode( $template_data['tags'] ),
			'isPro' => ( '1' === $template_data['is_pro'] ),
			'accessLevel' => $template_data['access_level'],
			'accessTier' => $access_tier,
			'popularityIndex' => (int) $template_data['popularity_index'],
			'trendIndex' => (int) $template_data['trend_index'],
			'hasPageSettings' => ( '1' === $template_data['has_page_settings'] ),
			'url' => $template_data['url'],
			'favorite' => ! empty( $favorite_templates[ $template_data['id'] ] ),
		];
	}

public function clear_cache() {
		delete_transient( static::TEMPLATES_DATA_TRANSIENT_KEY_PREFIX . ELEMENTOR_VERSION );
	}
}