Changeset 56620

Timestamp:

09/19/2023 12:48:41 PM (12 months ago)

Author:

gziolo

Message:

Blocks: Introduce a variation of serialize blocks helper with traversing

Introduces two new functions traverse_and_serialize_blocks and traverse_and_serialize_block with the additional $callback argument. It is possible to pass parent block, block index, chunk index to the callback argument.

Reverts changes applied to serialize_blocks and serialize_block in #59327 with [56557].

Props ockham, mukesh27.
See #59313.

Location:

trunk

Files:

• src/wp-includes/block-template-utils.php (modified) (1 diff)
• src/wp-includes/blocks.php (modified) (2 diffs)
• tests/phpunit/tests/blocks/serialize.php (modified) (3 diffs)

trunk/src/wp-includes/block-template-utils.php

@@ -610 +610 @@
 
     $blocks            = parse_blocks( $template_content );
-    $template->content = serialize_blocks( $blocks, '_inject_theme_attribute_in_template_part_block' );
+    $template->content = traverse_and_serialize_blocks( $blocks, '_inject_theme_attribute_in_template_part_block' );
 
     return $template;

trunk/src/wp-includes/blocks.php

@@ -928 +928 @@
  *
  * @since 5.3.1
- * @since 6.4.0 The `$callback` parameter was added.
- *
- * @param array         $block    A representative array of a single parsed block object. See WP_Block_Parser_Block.
- * @param callable|null $callback Optional. Callback to run on each block in the tree before serialization. Default null.
+ *
+ * @param array $block A representative array of a single parsed block object. See WP_Block_Parser_Block.
  * @return string String of rendered HTML.
  */
-function serialize_block( $block, $callback = null ) {
-    if ( is_callable( $callback ) ) {
-        $block = call_user_func( $callback, $block );
-    }
-
+function serialize_block( $block ) {
     $block_content = '';
 
     $index = 0;
     foreach ( $block['innerContent'] as $chunk ) {
-        $block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ], $callback );
+        $block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
     }
 
@@ -962 +956 @@
  *
  * @since 5.3.1
- * @since 6.4.0 The `$callback` parameter was added.
- *
- * @param array[]       $blocks   An array of representative arrays of parsed block objects. See serialize_block().
- * @param callable|null $callback Optional. Callback to run on each block in the tree before serialization. Default null.
+ *
+ * @param array[] $blocks An array of representative arrays of parsed block objects. See serialize_block().
  * @return string String of rendered HTML.
  */
-function serialize_blocks( $blocks, $callback = null ) {
+function serialize_blocks( $blocks ) {
+    return implode( '', array_map( 'serialize_block', $blocks ) );
+}
+
+/**
+ * Traverses the block applying transformations using the callback provided and returns the content of a block,
+ * including comment delimiters, serializing all attributes from the given parsed block.
+ *
+ * This should be used when there is a need to modify the saved block.
+ * Prefer `serialize_block` when preparing a block to be saved to post content.
+ *
+ * @since 6.4.0
+ *
+ * @see serialize_block()
+ *
+ * @param array    $block    A representative array of a single parsed block object. See WP_Block_Parser_Block.
+ * @param callable $callback Callback to run on each block in the tree before serialization.
+ *                           It is called with the following arguments: $block, $parent_block, $block_index, $chunk_index.
+ * @return string String of rendered HTML.
+ */
+function traverse_and_serialize_block( $block, $callback ) {
+    $block_content = '';
+    $block_index   = 0;
+
+    foreach ( $block['innerContent'] as $chunk_index => $chunk ) {
+        if ( is_string( $chunk ) ) {
+            $block_content .= $chunk;
+        } else {
+            $inner_block = call_user_func(
+                $callback,
+                $block['innerBlocks'][ $block_index ],
+                $block,
+                $block_index,
+                $chunk_index
+            );
+            $block_index++;
+            $block_content .= traverse_and_serialize_block( $inner_block, $callback );
+        }
+    }
+
+    if ( ! is_array( $block['attrs'] ) ) {
+        $block['attrs'] = array();
+    }
+
+    return get_comment_delimited_block_content(
+        $block['blockName'],
+        $block['attrs'],
+        $block_content
+    );
+}
+
+/**
+ * Traverses the blocks applying transformations using the callback provided,
+ * and returns a joined string of the aggregate serialization of the given parsed blocks.
+ *
+ * This should be used when there is a need to modify the saved blocks.
+ * Prefer `serialize_blocks` when preparing blocks to be saved to post content.
+ *
+ * @since 6.4.0
+ *
+ * @see serialize_blocks()
+ *
+ * @param array[]  $blocks   An array of representative arrays of parsed block objects. See serialize_block().
+ * @param callable $callback Callback to run on each block in the tree before serialization.
+ *                           It is called with the following arguments: $block, $parent_block, $block_index, $chunk_index.
+ * @return string String of rendered HTML.
+ */
+function traverse_and_serialize_blocks( $blocks, $callback ) {
     $result = '';
     foreach ( $blocks as $block ) {
-        $result .= serialize_block( $block, $callback );
+        // At the top level, there is no parent block, block index, or chunk index to pass to the callback.
+        $block = call_user_func( $callback, $block );
+        $result .= traverse_and_serialize_block( $block, $callback );
     }
     return $result;

trunk/tests/phpunit/tests/blocks/serialize.php

@@ -14 +14 @@
     /**
      * @dataProvider data_serialize_identity_from_parsed
+     *
+     * @param string $original Original block markup.
      */
     public function test_serialize_identity_from_parsed( $original ) {
         $blocks = parse_blocks( $original );
 
-        $actual   = serialize_blocks( $blocks );
-        $expected = $original;
+        $actual = serialize_blocks( $blocks );
 
-        $this->assertSame( $expected, $actual );
+        $this->assertSame( $original, $actual );
     }
 
@@ -59 +60 @@
      * @ticket 59327
      *
-     * @covers ::serialize_blocks
+     * @covers ::traverse_and_serialize_blocks
      */
-    public function test_callback_argument() {
+    public function test_traverse_and_serialize_blocks() {
         $markup = "<!-- wp:outer --><!-- wp:inner {\"key\":\"value\"} -->Example.<!-- /wp:inner -->\n\nExample.\n\n<!-- wp:void /--><!-- /wp:outer -->";
         $blocks = parse_blocks( $markup );
 
-        $actual = serialize_blocks( $blocks, array( __CLASS__, 'add_attribute_to_inner_block' ) );
+        $actual = traverse_and_serialize_blocks( $blocks, array( __CLASS__, 'add_attribute_to_inner_block' ) );
 
         $this->assertSame(
@@ -79 +80 @@
         return $block;
     }
+
+    /**
+     * @ticket 59327
+     *
+     * @covers ::traverse_and_serialize_blocks
+     *
+     * @dataProvider data_serialize_identity_from_parsed
+     *
+     * @param string $original Original block markup.
+     */
+    public function test_traverse_and_serialize_identity_from_parsed( $original ) {
+        $blocks = parse_blocks( $original );
+
+        $actual = traverse_and_serialize_blocks(
+            $blocks,
+            function ( $block ) {
+                return $block;
+            }
+        );
+
+        $this->assertSame( $original, $actual );
+    }
 }