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/* global WP_Smush */

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/* global ajaxurl */

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/**

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* Directory scanner module that will Smush images in the Directory Smush modal.

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* @since 2.8.1

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* @param {string|number} totalSteps

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* @param {string|number} currentStep

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* @return {Object} Scan object.

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* @class

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const DirectoryScanner = ( totalSteps, currentStep ) => {

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totalSteps = parseInt( totalSteps );

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currentStep = parseInt( currentStep );

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let cancelling = false,

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failedItems = 0,

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skippedItems = 0;

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const obj = {

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scan() {

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const remainingSteps = totalSteps - currentStep;

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if ( currentStep !== 0 ) {

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// Scan started on a previous page load.

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step( remainingSteps ).fail( this.showScanError );

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} else {

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jQuery

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.post( ajaxurl, {

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action: 'directory_smush_start',

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_ajax_nonce: window.wp_smush_msgs.nonce

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}, () =>

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step( remainingSteps ).fail( this.showScanError )

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)

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.fail( this.showScanError );

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}

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cancel() {

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cancelling = true;

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return jQuery.post( ajaxurl, {

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action: 'directory_smush_cancel',

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_ajax_nonce: window.wp_smush_msgs.nonce

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} );

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getProgress() {

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if ( cancelling ) {

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return 0;

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}

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// O M G ... Logic at it's finest!

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const remainingSteps = totalSteps - currentStep;

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return Math.min(

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Math.round(

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( parseInt( totalSteps - remainingSteps ) * 100 ) /

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totalSteps

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);

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onFinishStep( progress ) {

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jQuery( '.wp-smush-progress-dialog .sui-progress-state-text' ).html(

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currentStep -

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failedItems +

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'/' +

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totalSteps +

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' ' +

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window.wp_smush_msgs.progress_smushed

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);

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WP_Smush.directory.updateProgressBar( progress );

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onFinish() {

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WP_Smush.directory.updateProgressBar( 100 );

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window.location.href =

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window.wp_smush_msgs.directory_url + '&scan=done';

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/**

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* Displays an error when the scan request fails.

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* @param {Object} res XHR object.

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showScanError( res ) {

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const dialog = jQuery( '#wp-smush-progress-dialog' );

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// Add the error class to show/hide elements in the dialog.

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dialog

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.removeClass( 'wp-smush-exceed-limit' )

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.addClass( 'wp-smush-scan-error' );

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// Add the error status and description to the error message.

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dialog

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.find( '#smush-scan-error' )

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.text( `${ res.status } ${ res.statusText }` );

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// Show/hide the 403 error specific instructions.

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const forbiddenMessage = dialog.find( '.smush-403-error-message' );

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if ( 403 !== res.status ) {

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forbiddenMessage.addClass( 'sui-hidden' );

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} else {

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forbiddenMessage.removeClass( 'sui-hidden' );

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}

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limitReached() {

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const dialog = jQuery( '#wp-smush-progress-dialog' );

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dialog.addClass( 'wp-smush-exceed-limit' );

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dialog

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.find( '#cancel-directory-smush' )

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.attr( 'data-tooltip', window.wp_smush_msgs.bulk_resume );

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dialog

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.find( '.sui-box-body .sui-icon-close' )

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.removeClass( 'sui-icon-close' )

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.addClass( 'sui-icon-play' );

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dialog

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.find( '#cancel-directory-smush' )

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.attr( 'id', 'cancel-directory-smush-disabled' );

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resume() {

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const dialog = jQuery( '#wp-smush-progress-dialog' );

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const resume = dialog.find( '#cancel-directory-smush-disabled' );

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dialog.removeClass( 'wp-smush-exceed-limit' );

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dialog

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.find( '.sui-box-body .sui-icon-play' )

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.removeClass( 'sui-icon-play' )

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.addClass( 'sui-icon-close' );

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resume.attr( 'data-tooltip', 'Cancel' );

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resume.attr( 'id', 'cancel-directory-smush' );

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obj.scan();

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};

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/**

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* Execute a scan step recursively

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* Private to avoid overriding

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* @param {number} remainingSteps

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const step = function( remainingSteps ) {

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if ( remainingSteps >= 0 ) {

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currentStep = totalSteps - remainingSteps;

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return jQuery.post(

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ajaxurl,

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{

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action: 'directory_smush_check_step',

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_ajax_nonce: window.wp_smush_msgs.nonce,

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step: currentStep,

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( response ) => {

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// We're good - continue on.

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if (

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'undefined' !== typeof response.success &&

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response.success

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) {

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if (

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'undefined' !== typeof response.data &&

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'undefined' !== typeof response.data.skipped &&

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true === response.data.skipped

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) {

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skippedItems++;

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}

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currentStep++;

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remainingSteps = remainingSteps - 1;

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obj.onFinishStep( obj.getProgress() );

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step( remainingSteps ).fail( obj.showScanError );

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} else if (

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'undefined' !== typeof response.data.error &&

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'dir_smush_limit_exceeded' === response.data.error

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) {

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// Limit reached. Stop.

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obj.limitReached();

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} else {

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// Error? never mind, continue, but count them.

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failedItems++;

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currentStep++;

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remainingSteps = remainingSteps - 1;

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obj.onFinishStep( obj.getProgress() );

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step( remainingSteps ).fail( obj.showScanError );

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}

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}

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);

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}

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return jQuery.post(

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ajaxurl,

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{

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action: 'directory_smush_finish',

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_ajax_nonce: window.wp_smush_msgs.nonce,

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items: totalSteps - ( failedItems + skippedItems ),

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failed: failedItems,

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skipped: skippedItems,

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( response ) => obj.onFinish( response )

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);

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};

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return obj;

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};

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export default DirectoryScanner;

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