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<?php

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namespace WPForms\Tasks;

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use WPForms_DB;

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/**

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* Class Meta helps to manage the tasks meta information

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* between Action Scheduler and WPForms hooks arguments.

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* We can't pass arguments longer than >191 chars in JSON to AS,

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* so we need to store them somewhere (and clean from time to time).

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* @since 1.5.9

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class Meta extends WPForms_DB {

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/**

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* Primary key (unique field) for the database table.

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* @since 1.5.9

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* @var string

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public $primary_key = 'id';

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/**

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* Database type identifier.

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* @since 1.5.9

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* @var string

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public $type = 'tasks_meta';

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/**

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* Primary class constructor.

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* @since 1.5.9

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public function __construct() {

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$this->table_name = self::get_table_name();

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}

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/**

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* Get the DB table name.

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* @since 1.5.9

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* @return string

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public static function get_table_name() {

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global $wpdb;

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return $wpdb->prefix . 'wpforms_tasks_meta';

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}

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/**

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* Get table columns.

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* @since 1.5.9

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public function get_columns() {

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return [

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'id' => '%d',

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'action' => '%s',

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'data' => '%s',

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'date' => '%s',

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];

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}

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/**

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* Default column values.

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* @since 1.5.9

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* @return array

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public function get_column_defaults() {

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return [

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'action' => '',

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'data' => '',

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'date' => gmdate( 'Y-m-d H:i:s' ),

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];

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}

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/**

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* Create custom entry meta database table.

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* Used in migration and on plugin activation.

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* @since 1.5.9

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* @noinspection UnusedFunctionResultInspection

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public function create_table() {

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global $wpdb;

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require_once ABSPATH . 'wp-admin/includes/upgrade.php';

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$charset_collate = $wpdb->get_charset_collate();

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$sql = "CREATE TABLE $this->table_name (

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id bigint(20) NOT NULL AUTO_INCREMENT,

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action varchar(255) NOT NULL,

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data longtext NOT NULL,

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date datetime NOT NULL,

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PRIMARY KEY (id)

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) $charset_collate;";

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dbDelta( $sql );

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}

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/**

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* Remove queue records for a defined period of time in the past.

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* Calling this method will remove queue records that are older than $period seconds.

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* @since 1.5.9

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* @param string $action Action that should be cleaned up.

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* @param int $interval Number of seconds from now.

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* @return int Number of removed tasks meta records.

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public function clean_by( $action, $interval ) {

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global $wpdb;

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if ( empty( $action ) || empty( $interval ) ) {

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return 0;

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}

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$table = self::get_table_name();

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$action = sanitize_key( $action );

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$date = gmdate( 'Y-m-d H:i:s', time() - (int) $interval );

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// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching

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return (int) $wpdb->query(

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$wpdb->prepare(

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"DELETE FROM $table WHERE action = %s AND date < %s", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared

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$action,

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$date

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)

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);

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}

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/**

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* Inserts a new record into the database.

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* @since 1.5.9

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* @param array $data Column data.

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* @param string $type Optional. Data type context.

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* @return int ID for the newly inserted record. 0 otherwise.

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public function add( $data, $type = '' ) {

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if ( empty( $data['action'] ) || ! is_string( $data['action'] ) ) {

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return 0;

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}

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$data['action'] = sanitize_key( $data['action'] );

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if ( isset( $data['data'] ) ) {

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$data['data'] = $this->prepare_data( $data['data'] );

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}

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if ( empty( $type ) ) {

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$type = $this->type;

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}

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return parent::add( $data, $type );

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}

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/**

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* Prepare data.

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* @since 1.7.0

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* @param array $data Meta data.

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* @return string

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private function prepare_data( $data ) {

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$string = wp_json_encode( $data );

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if ( $string === false ) {

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$string = '';

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}

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* We are encoding the string representation of all the data

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* to make sure that nothing can harm the database.

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* This is not an encryption, and we need this data later "as is",

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* so we are using one of the fastest way to do that.

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* This data is removed from DB on a daily basis.

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// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode

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return base64_encode( $string );

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}

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/**

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* Retrieve a row from the database based on a given row ID.

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* @since 1.5.9

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* @param int $meta_id Meta ID.

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* @return null|object

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* @noinspection PhpParameterNameChangedDuringInheritanceInspection

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public function get( $meta_id ) {

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$meta = parent::get( $meta_id );

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if ( empty( $meta ) || empty( $meta->data ) ) {

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return $meta;

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}

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// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode

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$decoded = base64_decode( $meta->data );

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if ( $decoded === false || ! is_string( $decoded ) ) {

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$meta->data = '';

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} else {

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$meta->data = json_decode( $decoded, true );

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}

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return $meta;

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}

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/**

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* Get meta ID by action name and params.

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* @since 1.7.0

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* @param string $action Action name.

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* @param array $params Action params.

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* @return int

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public function get_meta_id( $action, $params ) {

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global $wpdb;

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$table = self::get_table_name();

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$action = sanitize_key( $action );

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$data = $this->prepare_data( array_values( $params ) );

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return absint(

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$wpdb->get_var( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching

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$wpdb->prepare(

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"SELECT id FROM $table WHERE action = %s AND data = %s LIMIT 1", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared

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$action,

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$data

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)

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)

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);

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}

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}

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