add template for json feeds

CHANGELOG.md

@@ -1,2 +1,2 @@
 - ENHANCEMENT
-  - switch back to Hugo internal twitter-card template
+  - add template for Json Feeds

exampleSite/config.yml

@@ -30,7 +30,18 @@ outputFormats:
     name: "Atom"
     mediaType: "application/atom+xml"
     # generated file: <baseName>.<mediaType."application/atom+xml".suffixes[0]> = atom.xml
-    baseName: "atom"
+    baseName: "feed"
+    isPlainText: false
+    rel: "alternate"
+    isHTML: false
+    noUgly: true
+    permalinkable: false
+  Json:
+    # https://www.jsonfeed.org/2020/08/07/json-feed-version.html
+    name: "Json"
+    mediaType: "application/json"
+    # generated file: <baseName>.<mediaType."application/feed+json".suffixes[0]> = feed.json
+    baseName: "feed"
     isPlainText: false
     rel: "alternate"
     isHTML: false
@@ -41,6 +52,7 @@ outputs:
   home:
     - HTML
     - ATOM
+    - JSON
   page:
     - HTML
   section:
@@ -50,6 +62,7 @@ outputs:
   term:
     - HTML
     - ATOM
+    - JSON
 
 enableRobotsTXT: true
 

exampleSite/content/posts/how-to-use.md

@@ -31,6 +31,7 @@ This post works as a documentation for the features of the theme.
 - Simple sticky posts
 - Content tags
 - Multiple authors
+- Supports Atom and Json feeds
 
 ## Configuration
 

layouts/_default/list.json.json

@@ -0,0 +1,57 @@
+{{- $title := .Site.Title -}}
+{{- with .Title -}}
+    {{- if (not (eq . $title)) -}}
+        {{- $title = printf `%s on %s` . $title -}}
+    {{- end -}}
+{{- end -}}
+{
+    "version": "https://jsonfeed.org/version/1.1",
+    "title": {{ $title | jsonify }},
+    {{- with .Site.Params.subtitle }}
+    "description": {{ . | jsonify }},
+    {{- end }}
+    "home_page_url" : "{{ .Site.BaseURL }}",
+    {{- with .OutputFormats.Get "json" }}
+    "feed_url" : "{{ .Permalink }}",
+    {{- end }}
+    {{- with .Site.Params.GeekblogAuthor -}}
+    {{ with index $.Site.Data.authors . }}
+    "authors" : [
+        {
+            "name" : "{{ .name }}"{{ with .url }},
+            "url": "{{ . }}"{{ end }}{{ with .avatar }},
+            "avatar": "{{ . }}"{{ end }}
+        }
+    ],
+    {{- end }}
+    {{- end }}
+    "items" : [
+    {{- $pages := where .RegularPages "Type" "in" .Site.Params.mainSections -}}
+    {{- if (eq .Kind "home") -}}
+        {{- $pages = where .Site.RegularPages "Type" "in" .Site.Params.mainSections -}}
+    {{- end -}}
+    {{- $len := (len $pages) }}
+    {{- range $i, $page := $pages }}
+        {
+            "title" : {{ .Title | jsonify }},
+            "date_published" : {{ (.Date.Format "2006-01-02T15:04:05Z07:00") | jsonify }},
+            "date_modified" : {{ (.Lastmod.Format "2006-01-02T15:04:05Z07:00") | jsonify }},
+            "id" : "{{ .Permalink }}",
+            "url" : "{{ .Permalink }}",
+            {{- with .Params.authors -}}
+            "authors" : [
+                {{- $authors := (sort .) }}
+                {{- $authors_len := (len $authors) }}
+                {{- range $i, $element := $authors -}}
+                {{- $author := index $.Site.Data.authors $element }}
+                {
+                    "name" : "{{ $author.name }}"
+                }{{ if ne (add $i 1) $authors_len }},{{ end }}
+                {{- end }}
+            ],
+            {{- end }}
+            "content_html" : {{ .Content | jsonify }}
+        }{{ if ne (add $i 1) $len }},{{ end }}
+    {{- end }}
+    ]
+}