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<?php

namespace WPForms\Admin\Builder;

use WPForms\Helpers\CacheBase;
use WPForms\Helpers\File;

/**
 * Form templates cache handler.
 *
 * @since 1.6.8
 */
class TemplatesCache extends CacheBase {

/**
	 * Templates list content cache files.
	 *
	 * @since 1.8.6
	 *
	 * @var array
	 */
	const CONTENT_CACHE_FILES = [
		'admin-page' => 'templates-admin-page.html',
		'builder'    => 'templates-builder.html',
	];

/**
	 * List of plugins that can use the templates cache.
	 *
	 * @since 1.8.7
	 *
	 * @var array
	 */
	const PLUGINS = [
		'wpforms',
		'wpforms-lite',
	];

/**
	 * Determine if the class is allowed to load.
	 *
	 * @since 1.6.8
	 *
	 * @return bool
	 */
	protected function allow_load(): bool {

$has_permissions  = wpforms_current_user_can( [ 'create_forms', 'edit_forms' ] );
		$allowed_requests = wpforms_is_admin_ajax() ||
		                    wpforms_is_admin_page( 'builder' ) ||
		                    wpforms_is_admin_page( 'templates' ) ||
		                    wpforms_is_admin_page( 'tools', 'action-scheduler' );
		$allow            = wp_doing_cron() || wpforms_doing_wp_cli() || ( $has_permissions && $allowed_requests );

/**
		 * Whether to load this class.
		 *
		 * @since 1.7.2
		 *
		 * @param bool $allow True or false.
		 */
		return (bool) apply_filters( 'wpforms_admin_builder_templatescache_allow_load', $allow ); // phpcs:ignore WPForms.PHP.ValidateHooks.InvalidHookName
	}

/**
	 * Initialize the class.
	 *
	 * @since 1.8.7
	 */
	public function init() { // phpcs:ignore WPForms.PHP.HooksMethod.InvalidPlaceForAddingHooks

parent::init();

// Upgrade cached templates data after the plugin update.
		add_action( 'upgrader_process_complete', [ $this, 'upgrade_templates' ] );
	}

/**
	 * Upgrade cached templates data after the plugin update.
	 *
	 * @since 1.8.7
	 *
	 * @param object $upgrader WP_Upgrader instance.
	 */
	public function upgrade_templates( $upgrader ) {

if ( $this->allow_update_cache( $upgrader ) ) {
			$this->update( true );
		}
	}

/**
	 * Determine if allowed to update the cache.
	 *
	 * @since 1.8.7
	 *
	 * @param object $upgrader WP_Upgrader instance.
	 *
	 * @return bool
	 */
	private function allow_update_cache( $upgrader ): bool {

$result = $upgrader->result ?? null;

// Check if plugin was updated.
		if ( ! $result ) {
			return false;
		}

// Check if updated plugin is WPForms.
		if ( ! in_array( $result['destination_name'], self::PLUGINS, true ) ) {
			return false;
		}

return true;
	}

/**
	 * Provide settings.
	 *
	 * @since 1.6.8
	 *
	 * @return array Settings array.
	 */
	protected function setup() {

return [

// Remote source URL.
			'remote_source' => 'https://wpforms.com/templates/api/get/',

// Cache file.
			'cache_file'    => 'templates.json',

/**
			 * Time-to-live of the templates cache files in seconds.
			 *
			 * This applies to `uploads/wpforms/cache/templates.json`
			 * and all *.json files in `uploads/wpforms/cache/templates/` directory.
			 *
			 * @since 1.6.8
			 *
			 * @param integer $cache_ttl Cache time-to-live, in seconds.
			 *                           Default value: WEEK_IN_SECONDS.
			 */
			'cache_ttl'     => (int) apply_filters( 'wpforms_admin_builder_templates_cache_ttl', WEEK_IN_SECONDS ),

// Scheduled update action.
			'update_action' => 'wpforms_admin_builder_templates_cache_update',
		];
	}

/**
	 * Prepare data to store in a local cache.
	 *
	 * @since 1.6.8
	 *
	 * @param array $data Raw data received by the remote request.
	 *
	 * @return array Prepared data for caching.
	 */
	protected function prepare_cache_data( $data ): array {

if (
			empty( $data ) ||
			! is_array( $data ) ||
			empty( $data['status'] ) ||
			$data['status'] !== 'success' ||
			empty( $data['data'] )
		) {
			return [];
		}

$cache_data = $data['data'];

// Strip the word "Template" from the end of each template name.
		foreach ( $cache_data['templates'] as $slug => $template ) {
			$cache_data['templates'][ $slug ]['name'] = preg_replace( '/\sTemplate$/', '', $template['name'] );
		}

return $cache_data;
	}

/**
	 * Update the cache.
	 *
	 * @since 1.8.6
	 *
	 * @param bool $force Whether to force update the cache.
	 *
	 * @return bool
	 */
	public function update( bool $force = false ): bool {

$result = parent::update( $force );

if ( ! $result ) {
			return false;
		}

$this->wipe_content_cache();

return $result;
	}

/**
	 * Get cached templates content.
	 *
	 * @since 1.8.6
	 *
	 * @return string
	 */
	public function get_content_cache(): string {

// phpcs:ignore Universal.Operators.DisallowShortTernary.Found
		return File::get_contents( $this->get_content_cache_file() ) ?: '';
	}

/**
	 * Save templates content cache.
	 *
	 * @since 1.8.6
	 *
	 * @param string|mixed $content Templates content.
	 *
	 * @return bool
	 */
	public function save_content_cache( $content ): bool {

return File::put_contents( $this->get_content_cache_file(), (string) $content );
	}

/**
	 * Wipe cached templates content.
	 *
	 * @since 1.8.6
	 */
	public function wipe_content_cache() {

$cache_dir = $this->get_cache_dir();

// Delete the template content cache files. They will be regenerated on the first visit.
		foreach ( self::CONTENT_CACHE_FILES as $file ) {

$cache_file = $cache_dir . $file;

if ( is_file( $cache_file ) && is_readable( $cache_file ) ) {
				// phpcs:ignore WordPress.WP.AlternativeFunctions.unlink_unlink
				unlink( $cache_file );
			}
		}
	}

/**
	 * Get templates content cache file path.
	 *
	 * @since 1.8.6
	 *
	 * @return string
	 */
	private function get_content_cache_file(): string {

$context = wpforms_is_admin_page( 'templates' ) ? 'admin-page' : 'builder';

return File::get_cache_dir() . self::CONTENT_CACHE_FILES[ $context ];
	}
}

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