Issue #18 - improve solution to fix some Gutenberg issues by replacin…

…g render_callback functions with our own.

functions.php

@@ -65,9 +65,6 @@ function fizzie_enqueue_styles() {
  * Enqueue special styles for archives
  */
 function fizzie_enqueue_a2z() {
-    //bw_trace2();
-    //bw_backtrace();
-
     $timestamp = null;
     if ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) {
         $timestamp = filemtime( get_stylesheet_directory() . "/category.css" );
@@ -145,7 +142,6 @@ function fizzie_archive_description( $attrs, $content, $tag ) {
             $html .= $heading;
             $html .= '</h2>';
             $html .= $description;
-            bw_trace2($html, 'archive_description');
         }
     }
 
@@ -190,9 +186,6 @@ function fizzie_register_block_type_args( $args ) {
     if ( 'core/template-part' == $args['name'] ) {
         if ( 'gutenberg_render_block_core_template_part' == $args['render_callback'] ) {
             $args['render_callback'] = 'fizzie_render_block_core_template_part';
-        } else {
-            bw_trace2();
-            gob();
         }
     }
     return $args;
@@ -323,6 +316,8 @@ function fizzie_render_block_core_post_content( $attributes, $content, $block )
 
 
 function fizzie_render_block_core_template_part( $attributes, $content, $block ) {
-    $html = gutenberg_render_block_core_template_part( $attributes );
+    require_once __DIR__ . '/template-part.php';
+
+    $html = fizzie_lazy_render_block_core_template_part( $attributes, $content, $block );
     return $html;
 }

template-part.php

@@ -0,0 +1,148 @@
+<?php
+
+function fizzie_load_template_part( $attributes ) {
+    $content = null;
+    $postId = empty( $attributes['postId'] ) ? null : $attributes['postId'];
+    $theme = empty( $attributes['theme'] ) ? null : $attributes['theme'];
+    $slug = empty( $attributes['slug'] ) ? null : $attributes['slug'];
+    $template_part_file_path = null;
+
+    if ( $postId ) {
+        $content = fizzie_load_template_part_by_postId( $postId );
+    }
+    if ( !$content && $slug && $theme ) {
+        $content = fizzie_load_template_part_for_theme( $theme, $slug );
+    }
+    if ( !$content && $slug ) {
+        $template_part_file_path = get_stylesheet_directory() . '/block-template-parts/' . $slug . '.html';
+        $content = fizzie_load_template_part_file_by_slug( $slug, $template_part_file_path );
+    }
+
+    // What's the best way of telling the user that something's gone wrong?
+    // Do we need to account for the fact that the block could have been malformed?
+    //
+    if ( is_null( $content ) ) {
+
+        // $content = fizzie_create_error_block( );
+        $atts = implode( $attributes );
+        $html = 'Template Part Not Found: ' . $slug;
+        $html .= 'PostId: ' . $postId;
+        $html .= "Theme:" . $theme;
+        $html .= $template_part_file_path;
+        $html .= $atts;
+        $content = $html;
+    }
+    return $content;
+}
+
+/**
+ *
+ *
+ * If we have a post ID and the post exists and it's a wp_template_part, which means this template part
+ * is user-customized, render the corresponding post content.
+ *
+ * @param $postId
+ * @return string|null
+ */
+function fizzie_load_template_part_by_postId( $postId ) {
+    $content = null;
+    $post = get_post( $postId );
+    //bw_trace2( $post, "post", true );
+    if ( $post && ( 'wp_template_part' === $post->post_type ) ) {
+        $post_status = get_post_status( $postId );
+        //bw_trace2( $post_status, "post_status", true );
+        if ( 'publish' === $post_status ) {
+            $content = $post->post_content;
+        }
+    }
+    return $content;
+}
+
+/**
+ * Loads the wp_template_part by slug and theme name
+ *
+ * @param $theme
+ * @param $slug
+ * @return string|null
+ */
+function fizzie_load_template_part_for_theme( $theme, $slug ) {
+    $content = null;
+    if ( basename( wp_get_theme()->get_stylesheet() ) === $theme ) {
+        $template_part_query = new WP_Query(
+            array(
+                'post_type'      => 'wp_template_part',
+                'post_status'    => 'publish',
+                'name'           => $slug,
+                'meta_key'       => 'theme',
+                'meta_value'     => $theme,
+                'posts_per_page' => 1,
+                'no_found_rows'  => true,
+            )
+        );
+        $template_part_post  = $template_part_query->have_posts() ? $template_part_query->next_post() : null;
+        if ( $template_part_post ) {
+            // A published post might already exist if this template part was customized elsewhere
+            // or if it's part of a customized template.
+            $content = $template_part_post->post_content;
+        }
+    }
+    return $content;
+}
+
+/**
+ * Loads the template part file by slug name.
+ *
+ * Should this cater for child themes?
+ *
+ *
+ * @param $slug
+ * @return false|string
+ */
+function fizzie_load_template_part_file_by_slug( $slug, $template_part_file_path ) {
+    $content = null;
+    if ( 0 === validate_file( $slug ) ) {
+        if ( file_exists( $template_part_file_path ) ) {
+            $content = file_get_contents($template_part_file_path);
+        }
+    }
+    return $content;
+}
+
+function fizzie_lazy_render_block_core_template_part( $attributes, $content, $block  ) {
+    $content = null;
+    $template_part_file_path = null;
+    $postId = null;
+    //bw_trace2();
+    //bw_backtrace();
+
+    $content = fizzie_load_template_part( $attributes );
+    //bw_trace2( $content, "raw content" );
+
+    // Run through the actions that are typically taken on the_content.
+    $content = do_blocks( $content );
+    $content = wptexturize( $content );
+    $content = convert_smilies( $content );
+    // Should we run wpautop() here?
+    //$before = $content;
+    //$content = wpautop( $content );
+    /*
+    if ( 0 !== strcmp( $before,  $content ) ) {
+        bw_trace2( $before, "before", false );
+        bw_trace2( $content, "after", false );
+        bw_trace2(bw_trace_hexdump( $before ), "before wpautop", false);
+        bw_trace2(bw_trace_hexdump( $content ), "after wpautop", false);
+    }
+
+    */
+    $content = shortcode_unautop( $content );
+    if ( function_exists( 'wp_filter_content_tags' ) ) {
+        $content = wp_filter_content_tags( $content );
+    } else {
+        $content = wp_make_content_images_responsive( $content );
+    }
+    $content            = do_shortcode( $content );
+    $html_tag           = esc_attr( $attributes['tagName'] );
+    $wrapper_attributes = get_block_wrapper_attributes();
+
+    return "<$html_tag $wrapper_attributes>" . str_replace( ']]>', ']]&gt;', $content ) . "</$html_tag>";
+}