Merge pull request #5 from CaiJimmy/new-image-helper

feat(helper/image): new image helper

exampleSite/config.toml

@@ -13,6 +13,7 @@ DefaultContentLanguage = "en"                   # Theme i18n support
 [params]
     mainSections = ["post"]
     favicon = ""
+    featuredImageField = "image"
     [params.dateFormat]
         published = "Jan 02, 2006"
         lastUpdated = "Jan 02, 2006 15:04 MST"
@@ -37,9 +38,21 @@ DefaultContentLanguage = "en"                   # Theme i18n support
         [params.widgets.tagCloud]
             limit = 10
     [params.opengraph]
-        defaultImage = ""
         [params.opengraph.twitter]
             site = ""
+    [params.defaultImage]
+        [params.defaultImage.article]
+            enabled = false
+            local = false
+            src = ""
+        [params.defaultImage.articleList]
+            enabled = false
+            local = true
+            src = ""
+        [params.defaultImage.opengraph]
+            enabled = false
+            local = false
+            src = ""
             
 [menu]
     [[menu.main]]

layouts/_default/term.html

@@ -15,12 +15,16 @@
                 {{ end }}
             </div>
 
-            {{ if .Params.image }}
+            {{ $image := partial "helper/image" (dict "Context" . "Type" "taxonomy") }}
-                {{- $image := partial "helper/image" . -}}
+            {{ if $image.exists }}
-                {{- $thumbnail := $image.Fill "120x120" -}}
                 <div class="taxonomy-image">
-                    <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}"
+                    {{ if $image.resource }}   
-                        height="{{ $thumbnail.Height }}" loading="lazy">
+                        {{- $thumbnail := $image.resource.Fill "120x120" -}}
+                        <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}"
+                            height="{{ $thumbnail.Height }}" loading="lazy">
+                    {{ else }}
+                        <img src="{{ $image.permalink }}" loading="lazy">
+                    {{ end }}
                 </div>
             {{ end }}
         </div>

layouts/partials/article-list/compact.html

@@ -12,13 +12,17 @@
         </footer>
     </div>
 
-    {{ if .Params.image }}
+    {{ $image := partial "helper/image" (dict "Context" . "Type" "articleList") }}
-    {{- $image := partial "helper/image" . -}}
-    {{- $thumbnail := $image.Fill "120x120" -}}
     
-    <div class="article-image">
+    {{ if $image.exists }}
-        <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}"
+        <div class="article-image">
-            height="{{ $thumbnail.Height }}" loading="lazy">
+            {{ if $image.resource }}
-    </div>
+                {{- $thumbnail := $image.resource.Fill "120x120" -}}
+                <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}"
+                    height="{{ $thumbnail.Height }}" loading="lazy">
+            {{ else }}
+                <img src="{{ $image.permalink }}" loading="lazy" alt="Featured image of post {{ .Title }}" />
+            {{ end }}
+        </div>
     {{ end }}
 </article>

layouts/partials/article-list/default.html

@@ -1,17 +1,21 @@
-<article class="{{ if .Params.image }}has-image{{ end }}">
+{{ $image := partial "helper/image" (dict "Context" . "Type" "articleList") }}
-    {{ if .Params.image }}
+<article class="{{ if $image.exists }}has-image{{ end }}">
-        {{- $image := partial "helper/image" . -}}
+    {{ if $image.exists }}
-        {{- $thumbnail := $image.Fill "800x250" -}}
+        <div class="article-image">
-        {{- $thumbnailRetina := $image.Fill "1600x500" -}}
+            <a href="{{ .Permalink }}">
+                {{ if $image.resource }}
+                    {{- $thumbnail := $image.resource.Fill "800x250" -}}
+                    {{- $thumbnailRetina := $image.resource.Fill "1600x500" -}}
 
-    <div class="article-image">
+                    <img src="{{ $thumbnail.RelPermalink }}" 
-        <a href="{{ .Permalink }}">
+                        srcset="{{ $thumbnail.RelPermalink }} 1x, {{ $thumbnailRetina.RelPermalink }} 2x"
-            <img src="{{ $thumbnail.RelPermalink }}" 
+                        width="{{ $thumbnail.Width }}" height="{{ $thumbnail.Height }}" loading="lazy"
-            srcset="{{ $thumbnail.RelPermalink }} 1x, {{ $thumbnailRetina.RelPermalink }} 2x"
+                        alt="Featured image of post {{ .Title }}" />
-                width="{{ $thumbnail.Width }}" height="{{ $thumbnail.Height }}" loading="lazy"
+                {{ else }}
-                alt="Featured image of post {{ .Title }}" />
+                    <img src="{{ $image.permalink }}" loading="lazy" alt="Featured image of post {{ .Title }}" />
-        </a>
+                {{ end }}
-    </div>
+            </a>
+        </div>
     {{ end }}
 
     {{ partial "article/components/details" . }}

layouts/partials/article-list/tile.html

@@ -1,12 +1,19 @@
-<article class="{{ if .context.Params.image }}has-image{{ end }}">
+{{ $image := partial "helper/image" (dict "Context" .context "Type" .Type) }}
+<article class="{{ if $image.exists }}has-image{{ end }}">
     <a href="{{ .context.Permalink }}">
-        {{ if .context.Params.image }}
+        
-        {{- $image := partial "helper/image" .context | resources.Fingerprint "md5"  -}}
+        {{ if $image.exists }}
-        {{- $thumbnail :=  $image.Fill .size -}}
+            <div class="article-image">
-        <div class="article-image">
+                {{ if $image.resource }}
-            <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}" height="{{ $thumbnail.Height }}"
+                    {{- $imageRaw := $image.resource | resources.Fingerprint "md5" -}}
-                loading="lazy" data-key="{{ .context.Slug }}" data-hash="{{ $image.Data.Integrity }}">
+                    {{- $thumbnail := $imageRaw.Fill .size -}}
-        </div>
+
+                    <img src="{{ $thumbnail.RelPermalink }}" width="{{ $thumbnail.Width }}" height="{{ $thumbnail.Height }}" 
+                        loading="lazy" data-key="{{ .context.Slug }}" data-hash="{{ $imageRaw.Data.Integrity }}">
+                {{ else }}
+                    <img src="{{ $image.permalink }}" loading="lazy" data-key="{{ .context.Slug }}" data-hash="{{ $image.permalink }}"/>
+                {{ end }}
+            </div>
         {{ end }}
 
         <div class="article-details">

layouts/partials/article/components/details.html

@@ -1,15 +1,14 @@
-{{ $i := .Params.image }}
+{{ $image := partial "helper/image" (dict "Context" .) }}
 {{ $context := . }}
-
 <div class="article-details">
     {{ with $categories := .Params.categories }}
     <header class="article-category">
         {{ range $categories }}
-            {{ if $i }}
+            {{ if and $image.exists $image.resource }}
-                {{- $image := partial "helper/image" $context | resources.Fingerprint "md5"  -}}
+                {{- $imageRaw := $image.resource | resources.Fingerprint "md5"  -}}
-                {{- $20x := $image.Fill "20x20 smart"  -}}
+                {{- $20x := $imageRaw.Fill "20x20 smart"  -}}
                 <a href="/categories/{{ . | urlize }}" class="color-tag"
-                    data-image="{{ $20x.RelPermalink }}" data-key="{{ $context.Slug }}" data-hash="{{ $image.Data.Integrity }}">{{ . | humanize }}</a>
+                    data-image="{{ $20x.RelPermalink }}" data-key="{{ $context.Slug }}" data-hash="{{ $imageRaw.Data.Integrity }}">{{ . | humanize }}</a>
             {{ else }}
                 <a href="/categories/{{ . | urlize }}">{{ . | humanize }}</a>
             {{ end }}

layouts/partials/article/components/header.html

@@ -1,16 +1,19 @@
 <header class="article-header">
-    {{ if .Params.image }}
+    {{ $image := partial "helper/image" (dict "Context" . "Type" "article") }}
-    {{- $image := partial "helper/image" . -}}
 
-    {{- $tablet := $image.Resize "1024x" -}}
+    {{ if $image.exists }}
-    {{- $desktop := $image.Resize "2000x" -}}
+        <div class="article-image">
+            {{ if $image.resource }}
+                {{- $tablet := $image.resource.Resize "1024x" -}}
+                {{- $desktop := $image.resource.Resize "2000x" -}}
 
-    <div class="article-image">
+                <img srcset="{{ $tablet.RelPermalink }} 1024w, {{ $desktop.RelPermalink }} 2000w"
-        <img srcset="{{ $tablet.RelPermalink }} 1024w, {{ $desktop.RelPermalink }} 2000w"
+                    src="{{ $desktop.RelPermalink }}" width="{{ $image.resource.Width }}" height="{{ $image.resource.Height }}" loading="lazy"
-            src="{{ $desktop.RelPermalink }}" width="{{ $image.Width }}" height="{{ $image.Height }}"
+                    alt="Featured image of post {{ .Title }}" />
-            loading="lazy"
+            {{ else }}
-            alt="Featured image of post {{ .Title }}" />
+                <img src="{{ $image.permalink }}" loading="lazy" alt="Featured image of post {{ .Title }}" />
-    </div>
+            {{ end }}
+        </div>
     {{ end }}
 
     {{ partial "article/components/details" . }}

layouts/partials/head/opengraph.html

@@ -40,13 +40,9 @@
 	{{- end -}}
 {{- end -}}
 
-{{- if .Params.image -}}
+{{ $image := partial "helper/image" (dict "Context" . "Type" "opengraph") }}
-	{{ $image := partial "helper/image" . }}
+{{- if $image.exists -}}
 	<meta name="twitter:card" content="summary_large_image">
-	<meta property='og:image' content='{{ absURL $image.RelPermalink }}' />
+	<meta property='og:image' content='{{ absURL $image.permalink }}' />
-	<meta name="twitter:image" content='{{ absURL $image.RelPermalink }}' />
+	<meta name="twitter:image" content='{{ absURL $image.permalink }}' />
-{{- else if .Site.Params.opengraph.defaultImage -}}
-	{{ $image := resources.Get .Site.Params.opengraph.defaultImage }}
-	<meta property='og:image' content='{{ absURL $image.RelPermalink }}' />
-	<meta name="twitter:image" content='{{ absURL $image.RelPermalink }}' />
 {{- end -}}

layouts/partials/helper/image.html

@@ -1,2 +1,63 @@
-{{- $image := .Resources.GetMatch (printf "%s" (.Params.image | safeURL)) -}}
+{{ $result := dict "exists" false "permalink" nil "resource" nil "isDefault" false }}
-{{ return $image }}
+{{ $imageField := default "image" .Context.Site.Params.featuredImageField }}
+{{ $imageValue := index .Context.Params $imageField }}
+
+{{ if $imageValue }}
+    <!-- If page has `image` field set -->
+    {{ $result = merge $result (dict "exists" true) }}
+    {{ $url := urls.Parse $imageValue }}
+
+    {{ if or (eq $url.Scheme "http") (eq $url.Scheme "https") }}
+        <!-- Is a external image -->
+        {{ $result = merge $result (dict "permalink" $imageValue) }}
+    {{ else }}
+        {{ $pageResourceImage := .Context.Resources.GetMatch (printf "%s" ($imageValue | safeURL)) }}
+        {{ $siteResourceImage := resources.GetMatch (printf "%s" ($imageValue | safeURL)) }}
+        
+        {{ if $pageResourceImage }}
+            <!-- If image is found under page bundle -->
+            {{ $result = merge $result (dict "permalink" $pageResourceImage.RelPermalink) }}
+            {{ $result = merge $result (dict "resource" $pageResourceImage) }}
+        {{ else if $siteResourceImage }}
+            <!-- Try search image under site's assets folder -->
+            {{ $result = merge $result (dict "permalink" $siteResourceImage.RelPermalink) }}
+            {{ $result = merge $result (dict "resource" $siteResourceImage) }}
+        {{ else }}
+            <!-- Can not find the image -->
+            {{ errorf "Failed loading image: %q" $imageValue }}
+            {{ $result = merge $result (dict "exists" false) }}
+        {{ end }}
+
+    {{ end }}
+
+{{ else if and (ne .Type nil) (index .Context.Site.Params.defaultImage .Type) }}
+    <!-- Type arg is set, check for defaultImage setting -->
+    {{ $defaultImageSetting := index .Context.Site.Params.defaultImage .Type }}
+
+    {{ if $defaultImageSetting.enabled }}
+        {{ $result = merge $result (dict "isDefault" true) }}
+        {{ $result = merge $result (dict "exists" true) }}
+
+        {{ if $defaultImageSetting.local }}
+            {{ $siteResourceImage := resources.GetMatch (printf "%s" ($defaultImageSetting.src | safeURL)) }}
+
+            {{ if $siteResourceImage }}
+                <!-- Try search image under site's assets folder -->
+                {{ $result = merge $result (dict "permalink" $siteResourceImage.RelPermalink) }}
+                {{ $result = merge $result (dict "resource" $siteResourceImage) }}
+            {{ else }}
+                <!-- Can not find the image -->
+                {{ errorf "Failed loading image: %q" $defaultImageSetting.src }}
+                {{ $result = merge $result (dict "exists" false) }}
+            {{ end }}
+
+        {{ else }}
+            <!-- External image -->
+            {{ $result = merge $result (dict "permalink" $defaultImageSetting.src) }}
+        {{ end }}
+        
+    {{ end }}
+
+{{ end }}
+
+{{ return $result }}