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<?php

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if ( ! defined( 'ABSPATH' ) ) {

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exit; // Exit if accessed directly

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}

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/**

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* Class ET_GB_Utils_Conversion

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* Handling Gutenberg serialized content conversion into builder shortcode layout

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class ET_GB_Utils_Conversion {

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// Populate all layout block which is placed inside other block. Layout block contains

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// section which has to be the first level element once converted into VB content

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private $deep_layout_blocks = array();

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// Layout list. Layout block got its own section. Others are concatenated into text module

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private $layout_list = array();

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// Temporary variable to hold non layout block into one

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private $text_module_content = '';

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// Serialized layout

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private $shortcode_layout = '';

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/**

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* Check if given block is layout block

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* @since 4.1.0

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* @todo being set as static so it is easier to be used outside this class. If being used quite

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* frequently, probably consider wrap this into function. Not needed at the moment tho

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* @param array $block Parsed block.

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* @return bool

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public static function is_layout_block( $block = array() ) {

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$block_name = et_()->array_get( $block, 'blockName', '' );

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return 'divi/layout' === $block_name;

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}

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/**

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* Check if given block is reusable block

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* @since 4.1.0

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* @todo being set as static so it is easier to be used outside this class. If being used quite

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* frequently, probably consider wrap this into function. Not needed at the moment tho

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* @param array $block Parsed block.

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* @return bool

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public static function is_reusable_block( $block = array() ) {

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$block_name = et_()->array_get( $block, 'blockName', '' );

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return 'core/block' === $block_name && et_()->array_get( $block, 'attrs.ref' ) > 0;

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}

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/**

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* Get reusable block's parsed content. NOTE: WordPress has built in `render_block_core_block()`

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* but it renders the block and its content instead of parse its content.

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* @since 4.1.0

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* @see render_block_core_block()

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* @todo being set as static so it is easier to be used outside this class. If being used quite

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* frequently, probably consider wrap this into function. Not needed at the moment tho

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* @param array $block Parsed block.

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* @return array

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public static function get_reusable_block_content( $block ) {

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$block_id = et_()->array_get( $block, 'attrs.ref' );

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$block_data = get_post( $block_id );

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if ( ! $block_data || 'wp_block' !== $block_data->post_type || 'publish' !== $block_data->post_status ) {

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return array() ;

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}

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return parse_blocks( $block_data->post_content );

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}

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/**

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* Parse reusable block by getting its content and append it as innerBlocks

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* @since 4.1.0

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* @param array Parsed block.

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* @return array Modified parsed block.

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public static function parse_reusable_block( $block ) {

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$reusable_block_data = self::get_reusable_block_content( $block );

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$block['innerBlocks'] = array_merge( $block['innerBlocks'], $reusable_block_data );

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// Unset reusable block's ref attribute so reusable block content is no longer fetched

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unset( $block['attrs']['ref'] );

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// Change block into group so its content is being rendered

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$block['blockName'] = 'core/group';

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// Recreate innerContent which is used by block parser to render innerBlock.

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// See: `render_block()`'s `$block['innerContent'] as $chunk` loop

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$block['innerContent'] = array_merge(

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array( '<div class="wp-block-group"><div class="wp-block-group__inner-container">' ),

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array_fill( 0, count( $block['innerBlocks'] ), null ),

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array( '</div></div>' )

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);

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return $block;

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}

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/**

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* Pull layout block that is located deep inside inner blocks. Layout block contains section;

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* in builder, section has to be on the first level of document

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* @since 4.1.0

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* @param array $block Parsed block.

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private function pull_layout_block( $block ) {

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// Pull and populate layout block. Layout block contains section(s) so it should be rendered

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// on first level layout, below Gutenberg content inside text module

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if ( self::is_layout_block( $block ) ) {

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// Pull layout block and populate list of layout block located on inner blocks

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$this->deep_layout_blocks[] = $block;

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// Remove innerContent and innerHTML value because inner block can't be simply removed

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// due to nested block rendering relies on `$block['innerContent']` making cross reference

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// on `$block['innerBlocks']` and removing them causes error (see: `render_block()`'s

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// `$block['innerContent'] as $chunk` loop). Thus, set deep layout block's content empty

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// so it doesn't get rendered

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$block['innerHTML'] = '';

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$block['innerContent'] = array();

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return $block;

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}

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// Reusable block's content is not saved inside block; Thus Get reusable block's content,

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// append it as innerBlock, and pull layout block if exist.

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if ( self::is_reusable_block( $block ) ) {

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$block = self::parse_reusable_block( $block );

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}

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// Recursively loop over block then pull Layout Block

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if ( ! empty( $block['innerBlocks'] ) ) {

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$block['innerBlocks'] = array_map(

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array( $this, 'pull_layout_block' ),

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$block['innerBlocks']

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);

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}

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return $block;

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}

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/**

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* Convert serialized block into shortcode layout

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* @since 4.1.0

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* @param string $serialized_block

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* @return string

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public function block_to_shortcode( $serialized_block = '' ) {

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// Wrapper div needs to be trimmed

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$layout_open_tag = '<div class="wp-block-divi-layout">';

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$layout_open_length = strlen( $layout_open_tag );

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$layout_close_tag = '</div>';

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$layout_close_length = strlen( $layout_close_tag );

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// Parsed blocks

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$blocks = parse_blocks( $serialized_block );

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// Loop blocks

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foreach ( $blocks as $block ) {

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if ( self::is_layout_block( $block ) ) {

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// Append currently populated non-Layout Block into one before layout block is appended

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if ( ! empty( $this->text_module_content ) ) {

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$this->layout_list[] = $this->text_module_content;

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// Reset text module content so next non-layout block is placed below current layout block

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$this->text_module_content = '';

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}

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$this->layout_list[] = $block;

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} else {

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// Reusable block's content is not saved inside block; Thus Get reusable block's

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// content, append it as innerBlock, and pull layout block if exist.

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if ( self::is_reusable_block( $block ) ) {

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$block = self::parse_reusable_block( $block );

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}

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// Pull any Layout Block inside nested block if there's any

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if ( ! empty( $block['innerBlocks'] ) ) {

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$block['innerBlocks'] = array_map(

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array( $this, 'pull_layout_block' ),

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$block['innerBlocks']

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);

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}

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// Populate block into temporary text module content buffer

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$this->text_module_content .= render_block( $block );

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}

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}

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// Populate remaining non-layout block into layout list

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if ( ! empty( $this->text_module_content ) ) {

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$this->layout_list[] = $this->text_module_content;

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// Reset

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$this->text_module_content = '';

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}

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// Loop over populated content and render it into shortcode layout

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foreach( array_merge( $this->layout_list, $this->deep_layout_blocks ) as $item ) {

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if ( self::is_layout_block( $item ) ) {

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$shortcode_layout = trim( et_()->array_get( $item, 'innerHTML', '' ) );

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// Remove layout content opening <div>

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if ( $layout_open_tag === substr( $shortcode_layout, 0, $layout_open_length ) ) {

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$shortcode_layout = substr( $shortcode_layout, $layout_open_length );

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}

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// Remove layout content closing </div>

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if ( $layout_close_tag === substr( $shortcode_layout, ( 0 - $layout_close_length ) ) ) {

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$shortcode_layout = substr( $shortcode_layout, 0, ( 0 - $layout_close_length ) );

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}

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$this->shortcode_layout .= $shortcode_layout;

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} else {

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$text_module = '[et_pb_text]' . $item . '[/et_pb_text]';

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$column = '[et_pb_column type="4_4"]' . $text_module . '[/et_pb_column]';

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$row = '[et_pb_row admin_label="row"]' . $column . '[/et_pb_row]';

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$this->shortcode_layout .= '[et_pb_section admin_label="section"]' . $row . '[/et_pb_section]';

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}

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}

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return $this->shortcode_layout;

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}

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}

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/**

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* Convert gutenberg block layout into shortcode.

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* NOTE: There is JS version for activation via Gutenberg. See: `convertBlockToShortcode()`

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* @since 4.1.0

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* @param string $post_content Post content / serialized block.

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* @return string Shortcode layout.

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function et_builder_convert_block_to_shortcode( $post_content ) {

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$conversion = new ET_GB_Utils_Conversion();

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return $conversion->block_to_shortcode( $post_content );

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}

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