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<?php if ( ! defined( 'ABSPATH' ) ) exit;

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class NF_AJAX_REST_RequiredUpdate extends NF_AJAX_REST_Controller

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{

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private $updates = array();

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private $running = array();

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protected $action = 'nf_required_update';

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public function __construct()

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{

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parent::__construct();

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}

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/**

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* POST

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* @param array $request_data [ int $clone_id ]

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* @return array $data [ int $new_form_id ]

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public function post( $request_data )

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{

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$data = array();

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// Does the current user have admin privileges

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if (!current_user_can('manage_options')) {

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$data['error'] = esc_html__('Access denied. You must have admin privileges to perform this action.', 'ninja-forms');

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return $data;

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}

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// If we don't have a nonce...

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// OR if the nonce is invalid...

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if ( ! isset( $request_data[ 'security' ] ) || ! wp_verify_nonce( $request_data[ 'security' ], 'ninja_forms_required_update_nonce' ) ) {

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// Kick the request out now.

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$data[ 'error' ] = esc_html__( 'Request forbidden.', 'ninja-forms' );

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return $data;

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}

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$doing_updates = get_option( 'ninja_forms_doing_required_updates' );

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// If we're not already doing updates...

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if ( ! $doing_updates ) {

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// Get our list of already run updates.

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$processed = get_option( 'ninja_forms_required_updates', array() );

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// Get our list of updates to run.

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$this->updates = Ninja_Forms()->config( 'RequiredUpdates' );

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// Sort our updates.

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$this->running = $this->sort_updates( $this->updates, $processed );

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} // Otherwise... (We are already processing updates.)

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else {

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$this->running = $doing_updates;

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}

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// Call the class of our current update.

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$class = $this->running[ 0 ][ 'class_name' ];

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$update_class = new $class( $request_data, $this->running );

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}

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/**

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* GET

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* @param $request_data (Array)

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* @return $data (Array)

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* @since 3.4.0

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public function get( $request_data ) {

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$data = array();

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$data[ 'updates' ] = array();

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// Get our list of already run updates.

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$processed = get_option( 'ninja_forms_required_updates', array() );

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// Get our list of updates yet to be run.

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$this->updates = Ninja_Forms()->config( 'RequiredUpdates' );

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// Sort our updates.

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$sorted = $this->sort_updates( $this->updates, $processed );

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$data[ 'updates' ] = $sorted;

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return $data;

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}

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protected function get_request_data()

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{

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$request_data = array();

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

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$request_data['data'] = WPN_Helper::sanitize_text_field($_REQUEST['data']);

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}

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if( isset( $_REQUEST[ 'security' ] ) && $_REQUEST[ 'security' ] ){

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$request_data[ 'security' ] = WPN_Helper::sanitize_text_field($_REQUEST[ 'security' ]);

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}

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if( isset( $_REQUEST[ 'action' ] ) && $_REQUEST[ 'action' ] ){

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$request_data[ 'action' ] = WPN_Helper::sanitize_text_field($_REQUEST[ 'action' ]);

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}

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return $request_data;

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}

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/**

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* Function to get the list of updates that need to run.

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* @param $processed (Array) The list of updates that have already run on this install.

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* @return Array

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private function get_current_updates( $processed ) {

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$updates = array();

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// For each update in the list...

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foreach ( $this->updates as $slug => $update ) {

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// If we've not already processed it...

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if ( ! isset( $processed[ $slug ] ) ) {

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// Add it to our list.

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$updates[ $slug ] = $update;

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}

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}

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return $updates;

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}

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/**

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* Function to sort the updates to be run.

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* @param $current (Array) The list of updates to be run.

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* @param $previous (Array) The list of updates that have already been run.

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* @return Array

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private function sort_updates( $current, $previous ) {

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$sorted = array();

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$queue = array();

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// While we have not finished sorting updates...

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while ( count( $sorted ) < count( $current ) ) {

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// For each update we wish to run...

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foreach ( $current as $slug => $update ) {

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// Migrate the slug to a property.

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$update[ 'slug' ] = $slug;

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// If we've not already added this to the sorted list...

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if ( ! in_array( $update, $sorted ) ) {

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// If it has requirements...

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if ( ! empty( $update[ 'requires' ] ) ) {

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$enqueued = 0;

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// For each requirement...

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foreach ( $update[ 'requires' ] as $requirement ) {

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// If the requirement doesn't exist...

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if ( ! isset( $this->updates[ $requirement ] ) ) {

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// unset the update b/c we are missing requirements

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unset( $current[ $slug ] );

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unset( $this->updates[ $slug ] );

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}

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// If the requirement has already been added to the stack...

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if ( in_array( $requirement, $queue ) ) {

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$enqueued++;

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} // OR If the requirement has already been processed...

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elseif ( isset( $previous[ $requirement ] ) ) {

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$enqueued++;

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}

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}

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// If all requirement are met...

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if ( $enqueued == count( $update[ 'requires' ] ) ) {

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// Add it to the list.

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array_push( $sorted, $update );

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// Record that we enqueued it.

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array_push( $queue, $slug );

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}

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} // Otherwise... (It has no requirements.)

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else {

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// Add it to the list.

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array_push( $sorted, $update );

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// Record that we enqueued it.

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array_push( $queue, $slug );

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}

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}

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}

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}

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return $sorted;

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}

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}

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