feat: add JSON Feed 1.1 per-category feed template

category-feed-json.njk

@@ -0,0 +1,69 @@
+---
+eleventyExcludeFromCollections: true
+eleventyImport:
+  collections:
+    - categoryFeeds
+pagination:
+  data: collections.categoryFeeds
+  size: 1
+  alias: categoryFeed
+permalink: "categories/{{ categoryFeed.slug }}/feed.json"
+---
+{
+  "version": "https://jsonfeed.org/version/1.1",
+  "title": "{{ site.name }} — {{ categoryFeed.name }}",
+  "home_page_url": "{{ site.url }}/categories/{{ categoryFeed.slug }}/",
+  "feed_url": "{{ site.url }}/categories/{{ categoryFeed.slug }}/feed.json",
+  "hubs": [
+    {
+      "type": "WebSub",
+      "url": "https://websubhub.com/hub"
+    }
+  ],
+  "description": "Posts tagged with \"{{ categoryFeed.name }}\" on {{ site.name }}",
+  "language": "{{ site.locale | default('en') }}",
+  "authors": [
+    {
+      "name": "{{ site.author.name | default(site.name) }}",
+      "url": "{{ site.url }}/"
+    }
+  ],
+  "_textcasting": {
+    "version": "1.0",
+    "about": "https://textcasting.org/"
+    {%- set hasSupport = site.support and (site.support.url or site.support.stripe or site.support.lightning or site.support.paymentPointer) %}
+    {%- if hasSupport %},
+    "support": {{ site.support | textcastingSupport | jsonEncode | safe }}
+    {%- endif %}
+  },
+  "items": [
+    {%- for post in categoryFeed.posts %}
+    {%- set absolutePostUrl = site.url + post.url %}
+    {%- set postImage = post.data.photo %}
+    {%- if postImage %}
+      {%- if postImage[0] and (postImage[0] | length) > 10 %}
+        {%- set postImage = postImage[0] %}
+      {%- endif %}
+    {%- endif %}
+    {%- if not postImage or postImage == "" %}
+      {%- set postImage = post.data.image or (post.content | extractFirstImage) %}
+    {%- endif %}
+    {
+      "id": "{{ absolutePostUrl }}",
+      "url": "{{ absolutePostUrl }}",
+      "title": {% if post.data.title %}{{ post.data.title | jsonEncode | safe }}{% else %}null{% endif %},
+      "content_html": {{ post.content | htmlToAbsoluteUrls(absolutePostUrl) | jsonEncode | safe }},
+      "content_text": {{ post.content | striptags | jsonEncode | safe }},
+      "date_published": "{{ post.date | dateToRfc3339 }}",
+      "date_modified": "{{ (post.data.updated or post.date) | dateToRfc3339 }}"
+      {%- if postImage and postImage != "" and (postImage | length) > 10 %},
+      "image": "{{ postImage | url | absoluteUrl(site.url) }}"
+      {%- endif %}
+      {%- set attachments = post.data | feedAttachments %}
+      {%- if attachments.length > 0 %},
+      "attachments": {{ attachments | jsonEncode | safe }}
+      {%- endif %}
+    }{% if not loop.last %},{% endif %}
+    {%- endfor %}
+  ]
+}