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<?php

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namespace WPML\Compatibility\Divi;

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use SitePress;

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class DynamicContent implements \IWPML_DIC_Action, \IWPML_Backend_Action {

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const ENCODED_CONTENT_START = '@ET-DC@';

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const ENCODED_CONTENT_END = '@';

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/** @var $positions */

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private $positions = [ 'before', 'after' ];

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/** @var SitePress */

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private $sitepress;

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/**

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* @param SitePress $sitepress

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public function __construct( SitePress $sitepress ) {

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$this->sitepress = $sitepress;

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}

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/**

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* Add filters and actions.

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public function add_hooks() {

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if ( $this->sitepress->is_setup_complete() ) {

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add_filter( 'wpml_pb_shortcode_decode', [ $this, 'decode_dynamic_content' ], 10, 2 );

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add_filter( 'wpml_pb_shortcode_encode', [ $this, 'encode_dynamic_content' ], 10, 2 );

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}

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}

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/**

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* Sets 'before' and 'after' dynamic content settings to translatable.

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* @param string $string The decoded string so far.

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* @param string $encoding The encoding used.

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* @return array

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public function decode_dynamic_content( $string, $encoding ) {

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if ( $this->is_dynamic_content( $string ) ) {

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$field = $this->decode_field( $string );

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$string = [

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'et-dynamic-content' => [

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'value' => $string,

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'translate' => false,

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];

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foreach ( $this->positions as $position ) {

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if ( ! empty( $field['settings'][ $position ] ) ) {

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$string[ $position ] = [

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'value' => $field['settings'][ $position ],

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'translate' => true,

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];

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}

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}

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}

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return $string;

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}

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/**

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* Rebuilds dynamic content with translated strings.

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* @param array $string The field array.

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* @param string $encoding The encoding used.

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* @return string

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public function encode_dynamic_content( $string, $encoding ) {

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if ( is_array( $string ) && isset( $string['et-dynamic-content'] ) ) {

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$field = $this->decode_field( $string['et-dynamic-content'] );

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foreach ( $this->positions as $position ) {

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if ( isset( $string[ $position ] ) ) {

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$field['settings'][ $position ] = $string[ $position ];

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}

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}

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$string = $this->encode_field( $field );

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}

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return $string;

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}

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/**

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* Check if a certain field contains dynamic content.

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* @param string $string The string to check.

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private function is_dynamic_content( $string ) {

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return substr( $string, 0, strlen( self::ENCODED_CONTENT_START ) ) === self::ENCODED_CONTENT_START;

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}

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/**

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* Decode a dynamic-content field.

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* @param string $string The string to decode.

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* @return array

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private function decode_field( $string ) {

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$start = strlen( self::ENCODED_CONTENT_START );

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$end = strlen( self::ENCODED_CONTENT_END );

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

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return json_decode( base64_decode( substr( $string, $start, -$end ) ), true );

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}

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/**

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* Encodes a dynamic-content field.

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* @param array $field The field to encode.

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* @return string

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private function encode_field( $field ) {

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

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return self::ENCODED_CONTENT_START

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. base64_encode( wp_json_encode( $field ) )

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. self::ENCODED_CONTENT_END;

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}

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}

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