themes/default/layouts/_default/_markup/render-image: Try not to fetch again

Messy but let's try to cache remote images and not fetch again unless
necessary. Use webp to check for existence. TODO: will have clean this up
later.

1 files changed, 43 insertions, 24 deletions

diff --git a/themes/default/layouts/_default/_markup/render-image.html b/themes/default/layouts/_default/_markup/render-image.html
index b588842..b3328e0 100644
--- a/themes/default/layouts/_default/_markup/render-image.html
+++ b/themes/default/layouts/_default/_markup/render-image.html
@@ -1,32 +1,40 @@
 {{- $source     := $.Destination | safeURL -}}
 {{- $public     := print "public/" $source -}}
-{{- $remote     := resources.GetRemote $source -}}
 {{- $local      := "" -}}
+{{- $cache      := "" -}}
+{{- $exists     := "" -}}
 {{- $width      := "" -}}
 {{- $height     := "" -}}
-{{- $cache      := "" -}}
 {{- $dimensions := "600x360" -}}
-{{- $immutable  := print (.Page.RelPermalink | humanize | urlize) "-" ($source | sha256 | truncate 8 "") -}}
+{{- $author     := .Page.Section -}}
+{{- $relURL     := strings.TrimPrefix .Page.Site.BaseURL .Page.Permalink -}}
+{{- $immutable  := print ($relURL | humanize | urlize) "-" ($source | sha256 | truncate 8 "") -}}
+{{- $fileCache  := print (partial "function-paths-media.html") "/" $author "/" $immutable -}}
 
-{{- with $remote -}}
-  {{- with .Err -}}
-    {{- if fileExists $public -}}
-      {{- $local = resources.Get $public -}}
-      {{- with $local -}}
-        {{- $local = .Content | resources.FromString (print (partial "function-paths-media.html") "/" $.Page.Section "/" (path.Base .)) -}}
+{{- if not (fileExists (print "public/" $fileCache (path.Ext $source))) -}}
+  {{- with $remote := resources.GetRemote $source -}}
+    {{- with .Err -}}
+      {{- if fileExists $public -}}
+        {{- $local = resources.Get $public -}}
+        {{- with $local -}}
+          {{- $local = .Content | resources.FromString (print (partial "function-paths-media.html") "/" $author "/" (path.Base .)) -}}
+        {{- end -}}
+        {{- $source = print ("" | absURL) $source -}}
+      {{- else -}}
+        {{- $404image := resources.Get "data/media/404.png" -}}
+        {{- with $404image -}}
+          {{- $width  = .Width -}}
+          {{- $height = .Height -}}
+        {{- end -}}
+        {{- $source = $404image.RelPermalink -}}
       {{- end -}}
-      {{ $source = print ("" | absURL) $source }}
     {{- else -}}
-      {{- $404image := resources.Get "data/media/404.png" -}}
-      {{- with $404image -}}
-        {{- $width  = .Width -}}
-        {{- $height = .Height -}}
-      {{- end -}}
-      {{ $source = $404image.RelPermalink }}
+      {{- $cache = .Content | resources.FromString (print (partial "function-paths-media.html") "/" $author "/" (path.Base .)) -}}
     {{- end -}}
-  {{- else -}}
-    {{- $cache = .Content | resources.FromString (print (partial "function-paths-media.html") "/" $.Page.Section "/" (path.Base .)) -}}
-  {{ end }}
+  {{- end -}}
+{{- else -}}
+  {{- $exists = resources.Get (print "public/" $fileCache (path.Ext $source)) -}}
+  {{- $exists = $exists.Content | resources.FromString (print (partial "function-paths-media.html") "/" $author "/" (path.Base $exists)) -}}
 {{ end }}
 {{- /* This comment removes trailing newlines and white spaces. */ -}}
 <figure>
@@ -34,24 +42,35 @@
     <picture>
       {{- with $local }}
         {{- $local = .Fit (print $dimensions " webp") }}
-        {{- $local = $local | resources.Copy (print (partial "function-paths-media.html") "/" $.Page.Section "/" $immutable ".webp") }}
+        {{- $local = $local | resources.Copy (print (partial "function-paths-media.html") "/" $author "/" $immutable ".webp") }}
         <source srcset="{{- $local.RelPermalink -}}" type="image/webp" />
         {{- $local = .Fit $dimensions }}
-        {{- $local = $local | resources.Copy (print (partial "function-paths-media.html") "/" $.Page.Section "/" $immutable (path.Ext $local)) }}
+        {{- $local = $local | resources.Copy (print (partial "function-paths-media.html") "/" $author "/" $immutable (path.Ext $local)) }}
         {{- $width = $local.Width -}}
         {{- $height = $local.Height -}}
         {{- $writeToFile := $local.Permalink }}
       {{- end }}
       {{- with $cache }}
         {{- $cache = .Fit (print $dimensions " webp") }}
-        {{- $cache = $cache | resources.Copy (print $.Page.Section "/media/" $immutable ".webp") }}
+        {{- $cache = $cache | resources.Copy (print $author "/media/" $immutable ".webp") }}
         <source srcset="{{- $cache.RelPermalink -}}" type="image/webp" />
         {{- $cache = .Fit $dimensions }}
-        {{- $cache = $cache | resources.Copy (print (partial "function-paths-media.html") "/" $.Page.Section "/" $immutable (path.Ext $cache)) }}
+        {{- $cache = $cache | resources.Copy (print (partial "function-paths-media.html") "/" $author "/" $immutable (path.Ext $cache)) }}
         {{- $width = $cache.Width -}}
         {{- $height = $cache.Height -}}
         {{- $cache = $cache.RelPermalink }}
-      {{- end }}
+      {{- end -}}
+      {{- with $exists }}
+        {{- if fileExists (print "public/" $fileCache ".webp") -}}
+          <source srcset="/{{- print $fileCache ".webp" -}}" type="image/webp" />
+        {{- end -}}
+        {{- if fileExists (print "public/" $author "/media/" $immutable ".webp") -}}
+          <source srcset="/{{- print $author "/media/" $immutable ".webp" -}}" type="image/webp" />
+        {{- end -}}
+        {{- $width = .Width -}}
+        {{- $height = .Height -}}
+        {{- $cache = .RelPermalink }}
+      {{- end -}}
       <img loading="lazy"
         src="{{ or $cache $source }}"
         alt="{{ $.Text | htmlUnescape }}"