refactor!: rename media-url file and related parameters (#1651)

- Changed variable `img_cdn` to `cdn` in site configuration file.
- Changed the variable defining the relative path of the image in the post from `img_url` to `media_subpath`

_includes/embed/audio.html

@@ -4,7 +4,7 @@
 
 {% unless src contains '://' %}
   {%- capture src -%}
-    {% include img-url.html src=src %}
+    {% include media-url.html src=src %}
   {%- endcapture -%}
 {% endunless %}
 

_includes/embed/video.html

@@ -5,14 +5,14 @@
 
 {% unless video_url contains '://' %}
   {%- capture video_url -%}
-    {% include img-url.html src=video_url %}
+    {% include media-url.html src=video_url %}
   {%- endcapture -%}
 {% endunless %}
 
 {% if poster_url %}
   {% unless poster_url contains '://' %}
     {%- capture poster_url -%}
-      {% include img-url.html src=poster_url img_path=page.img_path %}
+      {% include media-url.html src=poster_url subpath=page.media_subpath %}
     {%- endcapture -%}
   {% endunless %}
   {% assign poster = 'poster="' | append: poster_url | append: '"' %}

_includes/head.html

@@ -20,7 +20,7 @@
 
     {% unless src contains '://' %}
       {%- capture img_url -%}
-        {% include img-url.html src=src img_path=page.img_path absolute=true %}
+        {% include media-url.html src=src subpath=page.media_subpath absolute=true %}
       {%- endcapture -%}
 
       {%- capture old_url -%}{{ src | absolute_url }}{%- endcapture -%}
@@ -31,7 +31,7 @@
 
   {% elsif site.social_preview_image %}
     {%- capture img_url -%}
-      {% include img-url.html src=site.social_preview_image absolute=true %}
+      {% include media-url.html src=site.social_preview_image absolute=true %}
     {%- endcapture -%}
 
     {%- capture og_image -%}

_includes/media-url.html

@@ -1,25 +1,25 @@
 {%- comment -%}
-  Generate image final URL based on `site.img_cdn`, `page.img_path`
+  Generate media resource final URL based on `site.cdn`, `page.media_subpath`
 
   Arguments:
-    src - required, basic image path
-    img_path - optional, relative path of image
+    src - required, basic media resources path
+    subpath - optional, relative path of media resources
     absolute - optional, boolean, if true, generate absolute URL
 
   Return:
-    image URL
+    media resources URL
 {%- endcomment -%}
 
 {% assign url = include.src %}
 
 {%- if url -%}
   {% unless url contains ':' %}
-    {%- comment -%} Add page image path prefix {%- endcomment -%}
-    {% assign url = include.img_path | default: '' | append: '/' | append: url %}
+    {%- comment -%} Add media resources subpath prefix {%- endcomment -%}
+    {% assign url = include.subpath | default: '' | append: '/' | append: url %}
 
     {%- comment -%} Prepend CND URL {%- endcomment -%}
-    {% if site.img_cdn %}
-      {% assign url = site.img_cdn | append: '/' | append: url %}
+    {% if site.cdn %}
+      {% assign url = site.cdn | append: '/' | append: url %}
     {% endif %}
 
     {% assign url = url | replace: '///', '/' | replace: '//', '/' | replace: ':/', '://' %}

_includes/refactor-content.html

@@ -97,7 +97,7 @@
     {% assign _lazyload = true %}
 
     {%- capture _img_url -%}
-      {% include img-url.html src=_src img_path=page.img_path %}
+      {% include media-url.html src=_src subpath=page.media_subpath %}
     {%- endcapture -%}
 
     {% assign _path_prefix = _img_url | remove: _src %}

_includes/sidebar.html

@@ -5,7 +5,7 @@
     <a href="{{ '/' | relative_url }}" id="avatar" class="rounded-circle">
       {%- if site.avatar != empty and site.avatar -%}
         {%- capture avatar_url -%}
-          {% include img-url.html src=site.avatar %}
+          {% include media-url.html src=site.avatar %}
         {%- endcapture -%}
         <img src="{{- avatar_url -}}" width="112" height="112" alt="avatar" onerror="this.style.display='none'">
       {%- endif -%}