Introduce topiclists

Add components to allow lists of distinct sessions/talks.
viewMode for these topiclists is dw:Topiclist
Update layout to select topiclist component if specified in model.

_includes/components/program_topic.html

@@ -0,0 +1,59 @@
+{% include strings.html %}
+{%- assign title = include.title -%}
+{%- assign view = include.view -%}
+
+{% capture session_query %}
+SELECT DISTINCT ?session
+WHERE {
+  {
+    ?session dct:title "{{- title -}}"@en ;
+      schema:location ?location ;
+      dct:date ?date ;
+    FILTER ({{ view.filter }})
+  }
+} ORDER BY ?date ?start ?end ?location
+{% endcapture %}
+
+{% capture metainformation_query %}
+SELECT DISTINCT ?start ?end ?location
+WHERE {
+  {
+    ?session dct:title "{{- title -}}"@en ;
+      schema:location ?location ;
+      dct:date ?date ;
+      schema:startTime ?start ;
+      schema:endTime ?end .
+    FILTER ({{ view.filter }})
+  }
+} ORDER BY ?date ?start ?end ?location
+{% endcapture %}
+
+{% assign sessions = view.resource | sparql_query: session_query %}
+
+{%- if sessions.first -%}
+  {%- assign title = sessions.first.session | rdf_property: "dct:title", site.language -%}
+{% assign metainformation = sessions.first.session | sparql_query: metainformation_query %}
+{%- assign description = sessions.first.session | rdf_property: "dct:description", site.language -%}
+<section class="timetable-unit"  id="topic">
+  <header>
+    <h3>
+      {{ metainformation.first.start | date: "%H:%M" }}
+    </h3>
+  </header>
+  <div>
+    <h4>
+      {{ title }}
+    </h4>
+  {%- for metadata in metainformation -%}
+    {%- assign location_title = metadata.location | rdf_property: "dct:title", site.language -%}
+    {%- unless location_title -%}
+      {%- assign location_title = metadata.location | rdf_property: "dct:title" -%}
+    {%- endunless -%}
+    <p class="meta">
+      <time datetime="{{ metadata.start | date: "%H:%M" }}">{{ metadata.start  | date: "%H:%M" }}</time> - <time datetime="{{ metadata.end | date: "%H:%M" }}">{{ metadata.end  | date: "%H:%M" }}</time> <span>|</span> {{ location_title }} <span>|</span> {% include components/available_language.html resource=sessions.first.session %}
+    </p>
+  {%-  endfor -%}
+    <p>{{- description -}}</p>
+  </div>
+</section>
+{%-  endif -%}

_includes/components/program_view_topiclist.html

@@ -0,0 +1,32 @@
+{% assign view = include.view %}
+
+{% capture sessions_query %}
+SELECT DISTINCT ?title # (min(?q_session) as ?session)
+WHERE {
+  {
+    ?resourceUri schema:subEvent ?q_session ;
+  } union {
+    ?resourceUri schema:subEvent ?subEvent .
+    ?subEvent schema:subEvent ?q_session .
+  }
+  ?q_session dct:title ?title ;
+    schema:startTime ?start .
+  {
+    ?q_session schema:location ?location ;
+      dct:date ?date .
+    FILTER NOT EXISTS  {?q_session site:track ?pause } 
+    FILTER ({{ view.filter }})
+  } FILTER(lang(?title) = "en")
+} ORDER BY ?start
+#} GROUP BY ?title ORDER BY ?start # GROUP BY does not work ruby
+{% endcapture %}
+
+{% assign sessions = view.resource | sparql_query: sessions_query %}
+
+{%- if sessions.first -%}
+  {%- for session_row in sessions -%}
+    {%- include components/program_topic.html title=session_row.title view=view-%}
+  {%- endfor -%}
+{%- else -%}
+  {%- assign program_empty = true -%}
+{%- endif -%}

_layouts/program_view.html

@@ -7,6 +7,7 @@
 {% assign baseMenuResource = page.rdf | rdf_property: "dw:menuResource" %}
 {% assign dwTable = "dw:Table" | rdf_get %}
 {% assign dwList = "dw:List" | rdf_get %}
+{% assign dwTopiclist = "dw:Topiclist" | rdf_get %}
 
 {% if baseMenuResource %}
   {% assign baseEventResource = baseMenuResource %}
@@ -55,6 +56,8 @@
   {%- include components/program_view_list.html view=view -%}
 {%- elsif mode == dwTable -%}
   {%- include components/program_view_table.html view=view -%}
+{%- elsif mode == dwTopiclist -%}
+  {%- include components/program_view_topiclist.html view=view -%}
 {%- endif -%}
 
 {%- if program_empty -%}