Allow special "materials" without an URL (lessons with titles only)

Fixes: #207

Author: encukou

naucse/models.py

@@ -183,7 +183,11 @@ def material(root, path, info):
         page = lesson.pages[info.get("page", "index")]
         return PageMaterial(root, path, page, info.get("type", "lesson"), info.get("title"))
     elif "url" in info:
-        return UrlMaterial(root, path, info["url"], info["title"], info.get("type"))
+        url = info["url"]
+        if url:
+            return UrlMaterial(root, path, url, info["title"], info.get("type"))
+        else:
+            return SpecialMaterial(root, path, info["title"], info.get("type"))
     else:
         raise ValueError("Unknown material type: {}".format(info))
 
@@ -245,6 +249,17 @@ def __init__(self, root, path, url, title, url_type):
         self.title = title
 
 
+class SpecialMaterial(Material):
+    prev = None
+    next = None
+    type = "special"
+    has_navigation = False
+
+    def __init__(self, root, path, title, url_type):
+        super().__init__(root, path, url_type)
+        self.title = title
+
+
 def merge_dict(base, patch):
     """Recursively merge `patch` into `base`
 

naucse/templates/_material_macros.html

@@ -7,6 +7,8 @@
         {{- bytesize_icon('eye') -}}
     {%- elif material.url_type == 'homework' -%}
         {{- bytesize_icon('edit') -}}
+    {%- elif material.url_type == 'special' -%}
+        {{- bytesize_icon('flag') -}}
     {%- else %}
         {{- bytesize_icon('link') -}}
     {%- endif -%}
@@ -19,10 +21,14 @@
         {% else %}
             {% set url=material.url %}
         {% endif %}
+        {% if url is defined %}
         <a href="{{ url }}">
+        {% endif %}
             {{- icon_for_material(material) -}}
             {{- material.title -}}
+        {% if url is defined %}
         </a>
+        {% endif %}
     </li>
 {%- endmacro -%}
 

runs/2017/pyladies-brno-podzim-po/info.yml

@@ -108,6 +108,11 @@ plan:
 
 - base: dict
   date: 2017-11-20
+  materials:
+  - title: Turnaj v piškvorkách
+    url: null
+    type: special
+  - +merge
 
 - base: pyglet
   date: 2017-11-27