refactor: added slugs to course and topics to make nice urls

- the slug is autogenerated from the title
- the slug of a topic is unique among all the topics of that course

community/lms/doctype/lms_course/lms_course.json

@@ -9,6 +9,7 @@
  "engine": "InnoDB",
  "field_order": [
   "title",
+  "slug",
   "description",
   "section_break_3",
   "is_published",
@@ -47,12 +48,20 @@
   {
    "fieldname": "column_break_5",
    "fieldtype": "Column Break"
+  },
+  {
+   "description": "The slug of the course. Autogenerated from the title if not specified.",
+   "fieldname": "slug",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Slug",
+   "unique": 1
   }
  ],
  "index_web_pages_for_search": 1,
  "is_published_field": "is_published",
  "links": [],
- "modified": "2021-03-19 15:44:47.411705",
+ "modified": "2021-04-06 15:33:08.870313",
  "modified_by": "Administrator",
  "module": "LMS",
  "name": "LMS Course",
@@ -71,7 +80,7 @@
    "write": 1
   }
  ],
- "search_fields": "title",
+ "search_fields": "slug",
  "sort_field": "creation",
  "sort_order": "DESC",
  "title_field": "title",

community/lms/doctype/lms_course/lms_course.py

@@ -3,8 +3,29 @@
 # For license information, please see license.txt
 
 from __future__ import unicode_literals
-# import frappe
+import frappe
 from frappe.model.document import Document
+from ...utils import slugify
 
 class LMSCourse(Document):
-	pass
+    def before_save(self):
+        if not self.slug:
+            self.slug = self.generate_slug(title=self.title)
+
+    def generate_slug(self, title):
+        result = frappe.get_all(
+            'LMS Course',
+            fields=['slug'])
+        slugs = set([row['slug'] for row in result])
+        return slugify(title, used_slugs=slugs)
+
+    def get_topic(self, slug):
+        """Returns the topic with given slug in this course as a Document.
+        """
+        result = frappe.get_all(
+            "LMS Topic",
+            filters={"course": self.name, "slug": slug})
+
+        if result:
+            row = result[0]
+            return frappe.get_doc('LMS Topic', row['name'])

community/lms/doctype/lms_topic/lms_topic.json

@@ -1,15 +1,15 @@
 {
  "actions": [],
  "allow_guest_to_view": 1,
- "autoname": "format:{title}",
  "creation": "2021-03-02 07:20:41.686573",
  "doctype": "DocType",
  "editable_grid": 1,
  "engine": "InnoDB",
  "field_order": [
   "course",
-  "preview",
   "title",
+  "slug",
+  "preview",
   "description",
   "order",
   "sections"
@@ -50,11 +50,17 @@
    "fieldtype": "Table",
    "label": "Sections",
    "options": "LMS Section"
+  },
+  {
+   "description": "The slug of the topic. Autogenerated from the title if not specified.",
+   "fieldname": "slug",
+   "fieldtype": "Data",
+   "label": "Slug"
   }
  ],
  "index_web_pages_for_search": 1,
  "links": [],
- "modified": "2021-03-05 17:08:55.580189",
+ "modified": "2021-04-06 14:12:48.514062",
  "modified_by": "Administrator",
  "module": "LMS",
  "name": "LMS Topic",

community/lms/doctype/lms_topic/lms_topic.py

@@ -6,12 +6,28 @@ from __future__ import unicode_literals
 import frappe
 from frappe.model.document import Document
 from .section_parser import SectionParser
+from ...utils import slugify
 
 class LMSTopic(Document):
     def before_save(self):
-        sections = SectionParser().parse(self.description)
+        course = self.get_course()
+        if not self.slug:
+            self.slug = self.generate_slug(title=self.title)
+
+        sections = SectionParser().parse(self.description or "")
         self.sections = [self.make_lms_section(i, s) for i, s in enumerate(sections)]
 
+    def get_course(self):
+        return frappe.get_doc("LMS Course", self.course)
+
+    def generate_slug(self, title):
+        result = frappe.get_all(
+            'LMS Topic',
+            filters={'course': self.course},
+            fields=['slug'])
+        slugs = set([row['slug'] for row in result])
+        return slugify(title, used_slugs=slugs)
+
     def get_sections(self):
         return sorted(self.sections, key=lambda s: s.index)
 
@@ -22,3 +38,6 @@ class LMSTopic(Document):
             s.contents = section.contents
             s.index = index
             return s
+
+
+