refactor: enhance the setting of preview image path

Author: cotes2020

_includes/head.html

@@ -22,21 +22,22 @@
     {% seo title=false %}
   {% endcapture %}
 
-  {% if page.image.path %}
-    {% capture target %}"{{ site.url }}{{ page.image.path | relative_url }}"{% endcapture %}
+  {% if page.image %}
+    {% assign img = page.image.path | default: page.image %}
+    {% assign img_path = page.img_path | append: '/' | append: img | replace: '//', '/' %}
+    {% capture target %}"{{ img | absolute_url }}"{% endcapture %}
 
     {% if site.img_cdn contains '//' %}
       <!-- it's a cross-origin URL -->
-      {% capture replacement %}"{{ site.img_cdn }}{{ page.img_path }}{{ page.image.path }}"{% endcapture %}
+      {% capture replacement %}"{{ site.img_cdn }}{{ img_path }}"{% endcapture %}
     {% else %}
       <!-- it's a local file path -->
       {%- capture replacement -%}
-        "{{ site.url }}{{ site.baseurl }}{{ site.img_cdn }}{{ page.img_path }}{{ page.image.path }}"
+        "{{ site.img_cdn | append: '/' | append: img_path | replace: '//', '/' | absolute_url }}"
       {%- endcapture -%}
     {% endif %}
 
     {% assign seo_tags = seo_tags | replace: target, replacement %}
-
   {% endif %}
 
   {{ seo_tags }}

_includes/refactor-content.html

@@ -107,13 +107,7 @@
 
         <!-- Add image path -->
         {% if page.img_path %}
-          {% assign _path = page.img_path %}
-          {% assign last_char = _path | slice: -1 %}
-
-          {% unless last_char == '/' %}
-            {% assign _path = _path | append: '/' %}
-          {% endunless %}
-
+          {% assign _path = page.img_path | append: '/' | replace: '//', '/' %}
           {% assign _src_prefix = _src_prefix | append: _path %}
         {% endif %}
 

_layouts/post.html

@@ -26,13 +26,13 @@ <h1 data-toc-skip>{{ page.title }}</h1>
     </span>
     {% endif %}
 
-  {% if page.image.path %}
+  {% if page.image %}
     {% capture bg %}
       {% unless page.image.no_bg %}{{ 'bg' }}{% endunless %}
     {% endcapture %}
 
     <div class="mt-3 mb-3">
-      <img src="{{ page.image.path }}" class="preview-img {{ bg | strip }}"
+      <img src="{{ page.image.path | default: page.image }}" class="preview-img {{ bg | strip }}"
         alt="{{ page.image.alt | default: "Preview Image" }}"
 
       {% if page.image.width %}