feat: added get_url method to cohort doctypes

This is required to make it easier to include links in the email
notification to mentors.

Issue #271

school/lms/doctype/cohort/cohort.py

@@ -5,6 +5,9 @@ import frappe
 from frappe.model.document import Document
 
 class Cohort(Document):
+    def get_url(self):
+        return f"{frappe.utils.get_url()}/courses/{self.course}/cohorts/{self.slug}"
+
     def get_subgroups(self, include_counts=False):
         names = frappe.get_all("Cohort Subgroup", filters={"cohort": self.name}, pluck="name")
         subgroups = [frappe.get_doc("Cohort Subgroup", name) for name in names]

school/lms/doctype/cohort_mentor/cohort_mentor.py

@@ -1,8 +1,12 @@
 # Copyright (c) 2021, FOSS United and contributors
 # For license information, please see license.txt
 
-# import frappe
+import frappe
 from frappe.model.document import Document
 
 class CohortMentor(Document):
-	pass
+    def get_subgroup(self):
+        return frappe.get_doc("Cohort Subgroup", self.subgroup)
+
+    def get_user(self):
+        return frappe.get_doc("User", self.email)

school/lms/doctype/cohort_subgroup/cohort_subgroup.py

@@ -10,6 +10,10 @@ class CohortSubgroup(Document):
         if not self.invite_code:
             self.invite_code = random_string(8)
 
+    def get_url(self):
+        cohort = frappe.get_doc("Cohort", self.cohort)
+        return f"{frappe.utils.get_url()}/courses/{self.course}/subgroups/{cohort.slug}/{self.slug}"
+
     def get_invite_link(self):
         cohort = frappe.get_doc("Cohort", self.cohort)
         return f"{frappe.utils.get_url()}/courses/{self.course}/join/{cohort.slug}/{self.slug}/{self.invite_code}"