Добавление генератора Atom [closes #4]

flatfilecms/templates/atom.jinja2

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom" xml:base="{{data.base_url}}">
+  <title type="text">{{title}}</title>
+  {%- if subtitle %}
+  <subtitle type="html">{{subtitle}}</subtitle>
+  {%- endif %}
+  <link rel="self" href="{{request.path_qs}}"/>
+  {%- if alternate %}
+  <link rel="alternate" type="text/html" hreflang="{{request.locale_name}}" href="{{alternate}}"/>
+  {%- endif %}
+  <updated>{{(pages[0][1].page['updated'] or pages[0][1].page['published']).isoformat()}}+00:00</updated>
+  <id>urn:uuid:{{id}}</id>
+  <author>
+    <name>{{author['name']}}</name>
+  </author>
+  {%- if category %}
+  <category term="{{category}}"/>
+  {%- endif %}
+  <generator uri="https://trac.radium.group/flatfilecms/" version="1.0">flatfilecms</generator>
+  {%- for item in pages %}
+  <entry>
+    <title>{{item[1].page['title']}}</title>
+    <link href="{{item[0]}}"/>
+    <id>urn:uuid:{{item[1].page['id']}}</id>
+    <updated>{{(item[1].page['updated'] or item[1].page['published']).isoformat()}}+00:00</updated>
+    <published>{{item[1].page['published'].isoformat()}}+00:00</published>
+    <summary>{{item[1].page['summary'] or item[1].page['description']}}</summary>
+    {%- if item[1].page['author'] %}
+    <author>
+      <name>{{item[1].page['author']['name']}}</name>
+    </author>
+    {%- endif %}
+    {%- if item[1].page['category'] %}
+    <category term="{{item[1].page['category']}}"/>
+    {%- endif %}
+  </entry>
+  {%- endfor %}
+</feed>

flatfilecms/templates/base.jinja2

@@ -12,6 +12,9 @@
     {% if amphtml is defined -%}
     <link rel="amphtml" href="{{amphtml}}">
     {% endif -%}
+    {% for link in alternate -%}
+    <link rel="{{link.type}}" title="{{link.title}}" href="{{link.href}}">
+    {% endfor -%}
     <title>{{title}}</title>
     {% block links %}
     {%- endblock %}

flatfilecms/templates/blogposts.jinja2

@@ -17,4 +17,8 @@
 </div>
 {% endfor %}
 </div>
+{% set atom_feed = alternate|selectattr('type', 'equalto', 'application/atom+xml')|first -%}
+{% if atom_feed -%}
+<p>Подписаться на обновления: <a href="{{atom_feed.href}}"><i class="fas fa-rss"></i></a></p>
+{% endif -%}
 {% endblock %}

flatfilecms/views/__init__.py

@@ -19,6 +19,7 @@ def set_content_type(self, content_type):
 
 def blog(self, options={}):
     path = options.get('base', '')
+    format = options.get('format', 'blogposts')
     root = find_root(self.context)
     tree = find_resource(root, path)
     postlist = []
@@ -27,19 +28,17 @@ def blog(self, options={}):
             postlist.append((f"{path}/{name}", item))
     post = self.context.page.copy()
     post['pages'] = sorted(
-        postlist,
-        key=lambda t: t[1].page['published'],
-        reverse=True)
+        postlist, key=lambda t: t[1].page['published'], reverse=True)
     if 'menu' not in post:
         post['menu'] = yaml.load(
             AssetResolver().resolve(
                 str(PurePath(self.context.data_path) /
                     'menu/default.yaml')).stream(),
             LoaderFactory(self.context.data_path))
-        return render_to_response(
-            '{0}.jinja2'.format(
-                post.get('template', 'blogposts')),
-            post,
-            request=self.request,
-            response=self.request.response
-        )
+    if format == 'atom':
+        set_content_type(self, 'application/atom+xml')
+    return render_to_response(
+        '{0}.jinja2'.format(post.get('template', format)),
+        post,
+        request=self.request,
+        response=self.request.response)