Added portal pages for courses and topics.

community/www/courses/topic.py

@@ -0,0 +1,34 @@
+import frappe
+
+def get_context(context):
+    context.no_cache = 1
+    course_name = get_queryparam("course", '/courses')
+    context.course = get_course(course_name)
+
+    topic_name = get_queryparam("topic", '/courses?course=' + course_name)
+    context.topic = get_topic(course_name, topic_name)
+
+    print("topic", context.topic)
+
+def get_queryparam(name, redirect_when_not_found):
+    try:
+        return frappe.form_dict[name]
+    except KeyError:
+        frappe.local.flags.redirect_location = redirect_when_not_found
+        raise frappe.Redirect
+
+def get_course(name):
+    try:
+        course = frappe.get_doc('Community Course', name)
+    except frappe.exceptions.DoesNotExistError:
+        raise frappe.NotFound
+    return course
+
+def get_topic(course_name, topic_name):
+    try:
+        topic = frappe.get_doc('Community Course Topic', topic_name)
+    except frappe.exceptions.DoesNotExistError:
+        raise frappe.NotFound
+    if topic.course != course_name:
+        raise frappe.NotFound
+    return topic