feat: integrated exercises into lessons

- an exercise can now be added to a lesson
- it is rendered using livecode editor with submit button
- remembers the submitted code and shows the submission time

Issue #90

community/lms/api.py

@@ -21,3 +21,13 @@ def get_section(name):
     """
     doc = frappe.get_doc("LMS Section", name)
     return doc and doc.as_dict()
+
+@frappe.whitelist()
+def submit_solution(exercise, code):
+    """Submits a solution.
+    """
+    ex = frappe.get_doc("Exercise", exercise)
+    if not ex:
+        return
+    doc = ex.submit(code)
+    return {"name": doc.name, "creation": doc.creation}

community/lms/doctype/lesson/lesson.py

@@ -18,6 +18,7 @@ class Lesson(Document):
     def make_lms_section(self, index, section):
             s = frappe.new_doc('LMS Section', parent_doc=self, parentfield='sections')
             s.type = section.type
+            s.id = section.id
             s.label = section.label
             s.contents = section.contents
             s.index = index

community/lms/doctype/lms_section/lms_section.json

@@ -9,7 +9,8 @@
   "contents",
   "code",
   "attrs",
-  "index"
+  "index",
+  "id"
  ],
  "fields": [
   {
@@ -43,12 +44,17 @@
    "fieldname": "index",
    "fieldtype": "Int",
    "label": "Index"
+  },
+  {
+   "fieldname": "id",
+   "fieldtype": "Data",
+   "label": "id"
   }
  ],
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-03-12 17:56:23.118854",
+ "modified": "2021-05-19 18:55:26.019625",
  "modified_by": "Administrator",
  "module": "LMS",
  "name": "LMS Section",

community/lms/doctype/lms_section/lms_section.py

@@ -10,6 +10,10 @@ class LMSSection(Document):
     def __repr__(self):
         return f"<LMSSection {self.label!r}>"
 
+    def get_exercise(self):
+        if self.type == "exercise":
+            return frappe.get_doc("Exercise", self.id)
+
     def get_latest_code_for_user(self):
         """Returns the latest code for the logged in user.
         """

community/lms/widgets/Exercise.html

@@ -0,0 +1,14 @@
+{% from "www/macros/livecode.html" import LiveCodeEditorJS, LiveCodeEditor with context %}
+
+<div class="exercise">
+  <h2>{{ exercise.title }}</h2>
+  <div class="exercise-description">{{frappe.utils.md_to_html(exercise.description)}}</div>
+
+  {% set submission = exercise.get_user_submission() %}
+
+  {{ LiveCodeEditor(exercise.name,
+        code=exercise.code,
+        reset_code=exercise.code,
+        is_exercise=True,
+        last_submitted=submission and submission.creation) }}
+</div>