Added preview and sections fields to LMS Topic

- The preview is used to show the details of the topic in the course page
- the sections are used to show the different part of the topic, each could be of a different type

Issue #8

community/lms/doctype/lms_topic/lms_topic.json

@@ -7,10 +7,12 @@
  "editable_grid": 1,
  "engine": "InnoDB",
  "field_order": [
+  "course",
+  "preview",
   "title",
   "description",
-  "course",
+  "order",
-  "order"
+  "sections"
  ],
  "fields": [
   {
@@ -37,11 +39,22 @@
    "fieldname": "order",
    "fieldtype": "Int",
    "label": "Order"
+  },
+  {
+   "fieldname": "preview",
+   "fieldtype": "Markdown Editor",
+   "label": "Preview"
+  },
+  {
+   "fieldname": "sections",
+   "fieldtype": "Table",
+   "label": "Sections",
+   "options": "LMS Section"
   }
  ],
  "index_web_pages_for_search": 1,
  "links": [],
- "modified": "2021-03-05 12:59:22.817471",
+ "modified": "2021-03-05 17:08:55.580189",
  "modified_by": "Administrator",
  "module": "LMS",
  "name": "LMS Topic",

community/www/courses/course.html

@@ -32,7 +32,7 @@
 			{% for topic in course.topics %}
 			<div class="list-group-item">
 				<h5><a href="/courses/topic?course={{course.name}}&topic={{topic.name}}">{{topic.title}}</a></h5>
-				<div>{{topic.description}}</div>
+				<div>{{topic.preview | markdown }}</div>
 			</div>
 			{% endfor %}
 		</div>

community/www/courses/course.py

@@ -17,7 +17,7 @@ def get_course(name):
 		filters={
 			'course': name
 		},
-		fields=['name', 'title', 'description'],
+		fields=['name', 'title', 'preview'],
 		order_by='creation'
 	)
 	return course

community/www/courses/topic.html

@@ -19,7 +19,30 @@
 
 		<h1>{{ topic.title }}</h1>
 
-		<div>{{ topic.description }}</div>
+    {% for s in topic.sections %}
+    <div class="section section-{{ s.type }}">
+      {{ render_section(s) }}
+    </div>
+    {% endfor %}
+
 	</div>
 </section>
 {% endblock %}
+
+{% macro render_section(s) %}
+  {% if s.type == "text" %}
+    {{ render_section_text(s) }}
+  {% elif s.type == "code" %}
+    {{ render_section_code(s) }}
+  {% else %}
+    <div>Unknown section type: {{s.type}}</div>
+  {% endif %}
+{% endmacro %}
+
+{% macro render_section_text(s) %}
+  {{ s.contents | markdown  }}
+{% endmacro %}
+
+{% macro render_section_code(s) %}
+<pre>{{s.code}}</pre>
+{% endmacro %}