Add JSON feed output format and create list.json.json layout

layouts/_default/list.json.json

@@ -0,0 +1,64 @@
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+     {{- $pctx := . }}
+{{- if .IsHome }}{{ $pctx = .Site }}{{ end }}
+{{- $pages := slice }}
+{{- if or $.IsHome $.IsSection }}
+{{- $pages = $pctx.RegularPages }}
+{{- else }}
+{{- $pages = $pctx.Pages }}
+{{- end }}
+{{- $limit := .Site.Config.Services.RSS.Limit }}
+{{- if ge $limit 1 }}
+{{- $pages = $pages | first $limit }}
+{{- end }}
+{{ $length := (len $pages) -}}
+{
+    "version": "https://jsonfeed.org/version/1.1",
+    "title": "{{ if eq  .Title  site.Title }}{{ site.Title }}{{ else }}{{ with .Title }}{{ . }} {{ i18n "string_on" }} {{ end }}{{ site.Title }}{{ end }}",
+    "description": "{{ i18n "string_recent_content" }} {{ if ne  .Title  site.Title }}{{ with .Title }}{{ i18n "string_in" }} {{ . }} {{ end }}{{ end }}{{ i18n "string_on" }} {{ site.Title }}",
+    "home_page_url": "{{ site.BaseURL }}",
+    {{ with .OutputFormats.Get "JSON" -}}
+    "feed_url": "{{ .Permalink }}",
+    {{ end -}}
+    {{ with site.Language.LanguageCode -}}
+    "language": "{{ . }}",
+    {{ end -}}
+    {{ with $.Param "icon" -}}
+    "icon": "{{ . | absURL }}",
+    {{ end -}}
+    {{ with $.Param "favicon" -}}
+    "favicon": "{{ . | absURL }}",
+    {{ end -}}
+    {{ with site.Params.author -}}
+    "authors": [
+        {{ .| jsonify }}
+    ],
+    {{ end -}}
+    "items": [
+        {{ range $index, $element := $pages -}}
+        {
+            "title": {{ .Title | jsonify }},
+            "date_published": "{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}",
+            "date_modified": "{{ .Lastmod.Format "2006-01-02T15:04:05Z07:00" }}",
+            "id": "{{ .Permalink }}",
+            "url": "{{ .Permalink }}",
+            {{ with .Params.author -}}
+            "authors": [
+                {
+                  "name": "{{ . }}"
+                }
+            ],
+            {{ end -}}
+	    "tags":[
+		  {{ range .Params.tags }}"{{ . }}", {{ end }}{{ range .Params.categories }}"{{ . }}", {{ end }}
+	    ],
+            "content_html": {{ .Content | jsonify }}
+        }{{ if ne (add $index 1) $length }},{{ end }}
+        {{ end -}}
+    ]
+}