Added the ability to save sketches

Implemented by exposing an RPC method to save the sketch and calling
from JS using `frappe.call`. Any logged-in user can create new sketches
and the owner can edit his/her own sketches.

community/lms/doctype/lms_sketch/lms_sketch.py

@@ -3,8 +3,37 @@
 # For license information, please see license.txt
 
 from __future__ import unicode_literals
-# import frappe
+import frappe
 from frappe.model.document import Document
 
 class LMSSketch(Document):
-	pass
+    def get_owner_name(self):
+        return self.owner.split("@")[0]
+
+@frappe.whitelist()
+def save_sketch(name, title, code):
+    if not name or name == "new":
+        doc = frappe.new_doc('LMS Sketch')
+        doc.title = title
+        doc.code = code
+        doc.runtime = 'python-canvas'
+        doc.insert()
+        status = "created"
+    else:
+        doc = frappe.get_doc("LMS Sketch", name)
+
+        if doc.owner != frappe.session.user:
+            return {
+                "ok": False,
+                "error": "Permission Denied"
+            }
+        doc.title = title
+        doc.code = code
+        doc.save()
+        status = "updated"
+    return {
+        "ok": True,
+        "status": status,
+        "name": doc.name,
+    }
+

community/www/macros/livecode.html

@@ -25,6 +25,8 @@
 {% macro LiveCodeEditorJS(name, code) %}
 <script type="text/javascript" src="{{ livecode_url }}/static/livecode.js"></script>
 <script type="text/javascript">
+  var livecodeEditors = [];
+
   $(function() {
     $(".canvas-editor").each((i, e) => {
       var editor = new LiveCodeEditor(e, {
@@ -32,6 +34,7 @@
         base_url: "{{ livecode_url }}",
         codemirror: true
       })
+      livecodeEditors.push(editor);
     })
   })
 </script>

community/www/sketches/sketch.html

@@ -29,22 +29,81 @@
 		</nav>
 
     <div class="sketch-header">
-		  <h1 class="sketch-title">{{ sketch.title }}</h1>
+      {% if editable %}
-      <div class="sketch-owner-wrapper">By <span class="sketch-owner">{{sketch.owner}}</span></div>
+        <input type="button" class="pull-right" id="sketch-save" value="Save"/>
+        <h1 class="sketch-title">
+            <input type="text" name="title" id="sketch-title" value="{{ sketch.title }}" />
+        </h1>
+      {% else %}
+        <h1 class="sketch-title">{{sketch.title}}</h1>
+      {% endif %}
+  <div class="sketch-owner-wrapper">By <span class="sketch-owner">{{sketch.get_owner_name()}}</span></div>
     </div>
 
-    {% if not sketch.name %}
+  {% if sketch.is_new() and not editable %}
     <div class="alert alert-warning">
-        Saving sketches is not yet implemented. Coming soon!
+      Please login to save this sketch.
     </div>
   {% endif %}
 
+    <div class="sketch-editor">
       {{LiveCodeEditor(sketch.name, sketch.code) }}
+    </div>
 </section>
 {% endblock %}
 
 {%- block script %}
   {{ super() }}
   {{ LiveCodeEditorJS() }}
+
+  <script type="text/javascript">
+    var sketch_name = {{ sketch.name | tojson }};
+
+    function saveSketch() {
+      var title = $("#sketch-title").val()
+      var code = livecodeEditors[0].codemirror.doc.getValue()
+      frappe.call('community.lms.doctype.lms_sketch.lms_sketch.save_sketch', {
+        name: sketch_name,
+        title: title,
+        code: code
+      })
+      .then(r => {
+        var msg = r.message;
+        if (!msg.ok) {
+          var error = msg.error || "Save failed."
+          frappe.msgprint({
+            "title": "Error",
+            "indicator": "red",
+            "message": error
+          });
+        }
+        else if (msg.status == "created") {
+          var path = "/sketches/sketch?sketch=" + msg.name;
+          var url = window.location.protocol + "//" + window.location.host + path
+          window.history.pushState({path: url}, '', url);
+          sketch_name = name;
+
+          frappe.msgprint({
+            "title": "Notification",
+            "indicator": "green",
+            "message": "New sketch has been saved!"
+          });
+        }
+        else if (msg.status == "updated") {
+          frappe.msgprint({
+            "title": "Notification",
+            "indicator": "green",
+            "message": "The sketch has been saved!"
+          });
+        }
+      })
+    }
+
+    $(function() {
+      $("#sketch-save").click(function() {
+        saveSketch();
+      });
+    })
+  </script>
 {%- endblock %}
 

community/www/sketches/sketch.py

@@ -5,6 +5,15 @@ def get_context(context):
     course_name = get_queryparam("sketch", '/sketches')
     context.sketch = get_sketch(course_name)
     context.livecode_url = get_livecode_url()
+    context.editable = is_editable(context.sketch, frappe.sesson.user)
+
+def is_editable(sketch, user):
+    if sketch.name == "new":
+        # new sketches can be editable by any logged in user
+        return user != "Guest"
+    else:
+        # existing sketches are editable by the owner
+        return sketch.owner == user
 
 def get_livecode_url():
     doc = frappe.get_doc("LMS Settings")
@@ -20,15 +29,13 @@ def get_queryparam(name, redirect_when_not_found):
 def get_sketch(name):
     if name == 'new':
         sketch = frappe.new_doc('LMS Sketch')
+        sketch.name = "new"
         sketch.title = "New Sketch"
         sketch.code = "circle(100, 100, 50)"
-        sketch.owner = frappe.session.user.split("@")[0]
         return sketch
 
     try:
-        sketch = frappe.get_doc('LMS Sketch', name)
+        return frappe.get_doc('LMS Sketch', name)
     except frappe.exceptions.DoesNotExistError:
         raise frappe.NotFound
 
-    sketch.owner = sketch.owner.split("@")[0]
-    return sketch