Merge branch 'anandpdoshi-feature/mentions-in-comments' into develop

frappe/boot.py

@@ -119,7 +119,7 @@ def get_fullnames():
 	ret = frappe.db.sql("""select name,
 		concat(ifnull(first_name, ''),
 			if(ifnull(last_name, '')!='', ' ', ''), ifnull(last_name, '')) as fullname,
-			user_image as image, gender, email
+			user_image as image, gender, email, username
 		from tabUser where enabled=1 and user_type!="Website User" """, as_dict=1)
 
 	d = {}

frappe/core/doctype/comment/comment.py

@@ -7,7 +7,8 @@ from frappe import _
 from frappe.website.render import clear_cache
 from frappe.model.document import Document
 from frappe.model.db_schema import add_column
-from frappe.utils import get_fullname
+from frappe.utils import get_fullname, get_link_to_form
+from frappe.core.doctype.user.user import extract_mentions
 
 exclude_from_linked_with = True
 
@@ -38,6 +39,7 @@ class Comment(Document):
 		"""Send realtime updates"""
 		if not self.comment_doctype:
 			return
+
 		if self.comment_doctype == 'Message':
 			if self.comment_docname == frappe.session.user:
 				message = self.as_dict()
@@ -50,6 +52,8 @@ class Comment(Document):
 			frappe.publish_realtime('new_comment', self.as_dict(), doctype= self.comment_doctype,
 				docname = self.comment_docname)
 
+			self.notify_mentions()
+
 	def validate(self):
 		"""Raise exception for more than 50 comments."""
 		if frappe.db.sql("""select count(*) from tabComment where comment_doctype=%s
@@ -144,6 +148,33 @@ class Comment(Document):
 
 		self.update_comments_in_parent(_comments)
 
+	def notify_mentions(self):
+		if self.comment_doctype and self.comment_docname and self.comment and self.comment_type=="Comment":
+			mentions = extract_mentions(self.comment)
+
+			if not mentions:
+				return
+
+			sender_fullname = get_fullname(frappe.session.user)
+			parent_doc_label = "{0} {1}".format(_(self.comment_doctype), self.comment_docname)
+			subject = _("{0} mentioned you in a comment in {1}").format(sender_fullname, parent_doc_label)
+			message = frappe.get_template("templates/emails/mentioned_in_comment.html").render({
+				"sender_fullname": sender_fullname,
+				"comment": self,
+				"link": get_link_to_form(self.comment_doctype, self.comment_docname, label=parent_doc_label)
+			})
+
+			recipients = [frappe.db.get_value("User", {"enabled": 1, "username": username, "user_type": "System User"})
+				for username in mentions]
+
+			frappe.sendmail(
+				recipients=recipients,
+				sender=frappe.session.user,
+				subject=subject,
+				message=message,
+				bulk=True
+			)
+
 def on_doctype_update():
 	"""Add index to `tabComment` `(comment_doctype, comment_name)`"""
 	if not frappe.db.sql("""show index from `tabComment`

frappe/core/doctype/doctype/doctype.py

@@ -296,12 +296,13 @@ def validate_fields(meta):
 			if d.fieldtype not in ("Data", "Link", "Read Only"):
 				frappe.throw(_("Fieldtype {0} for {1} cannot be unique").format(d.fieldtype, d.label))
 
-			has_non_unique_values = frappe.db.sql("""select `{fieldname}`, count(*)
-				from `tab{doctype}` group by `{fieldname}` having count(*) > 1 limit 1""".format(
-				doctype=d.parent, fieldname=d.fieldname))
+			if not d.get("__islocal"):
+				has_non_unique_values = frappe.db.sql("""select `{fieldname}`, count(*)
+					from `tab{doctype}` group by `{fieldname}` having count(*) > 1 limit 1""".format(
+					doctype=d.parent, fieldname=d.fieldname))
 
-			if has_non_unique_values and has_non_unique_values[0][0]:
-				frappe.throw(_("Field '{0}' cannot be set as Unique as it has non-unique values").format(d.label))
+				if has_non_unique_values and has_non_unique_values[0][0]:
+					frappe.throw(_("Field '{0}' cannot be set as Unique as it has non-unique values").format(d.label))
 
 		if d.search_index and d.fieldtype in ("Text", "Long Text", "Small Text", "Code", "Text Editor"):
 			frappe.throw(_("Fieldtype {0} for {1} cannot be indexed").format(d.fieldtype, d.label))

frappe/core/doctype/user/user.json

@@ -24,6 +24,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -49,6 +50,7 @@
    "oldfieldtype": "Check", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -72,6 +74,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -97,6 +100,7 @@
    "options": "Email", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 1, 
@@ -121,6 +125,7 @@
    "oldfieldtype": "Data", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 1, 
@@ -145,6 +150,7 @@
    "oldfieldtype": "Data", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -169,6 +175,7 @@
    "oldfieldtype": "Data", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -176,6 +183,30 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "fieldname": "username", 
+   "fieldtype": "Data", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "in_filter": 0, 
+   "in_list_view": 0, 
+   "label": "Username", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 1
+  }, 
   {
    "allow_on_submit": 0, 
    "bold": 0, 
@@ -194,6 +225,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -216,6 +248,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -238,6 +271,7 @@
    "oldfieldtype": "Column Break", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "print_width": "50%", 
    "read_only": 0, 
    "report_hide": 0, 
@@ -264,6 +298,7 @@
    "options": "Loading...", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -287,6 +322,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -310,6 +346,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -333,6 +370,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -358,6 +396,7 @@
    "options": "\nMale\nFemale\nOther", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -382,6 +421,7 @@
    "oldfieldtype": "Date", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -404,6 +444,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -425,6 +466,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -447,6 +489,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -470,6 +513,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -493,6 +537,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -515,6 +560,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -539,6 +585,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -561,6 +608,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 1, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -585,6 +633,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -609,6 +658,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -631,6 +681,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -655,6 +706,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -678,6 +730,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -702,6 +755,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -726,6 +780,7 @@
    "no_copy": 0, 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -748,6 +803,7 @@
    "no_copy": 0, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -771,6 +827,7 @@
    "options": "UserRole", 
    "permlevel": 1, 
    "print_hide": 1, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -796,6 +853,7 @@
    "permlevel": 1, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -819,6 +877,7 @@
    "permlevel": 1, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -843,6 +902,7 @@
    "permlevel": 1, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -867,6 +927,7 @@
    "oldfieldtype": "Column Break", 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "print_width": "50%", 
    "read_only": 1, 
    "report_hide": 0, 
@@ -893,6 +954,7 @@
    "options": "DefaultValue", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -917,6 +979,7 @@
    "oldfieldtype": "Section Break", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -944,6 +1007,7 @@
    "options": "System User\nWebsite User", 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 1, 
@@ -967,6 +1031,7 @@
    "no_copy": 0, 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -990,6 +1055,7 @@
    "no_copy": 0, 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1013,6 +1079,7 @@
    "no_copy": 0, 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1035,6 +1102,7 @@
    "oldfieldtype": "Column Break", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "print_width": "50%", 
    "read_only": 0, 
    "report_hide": 0, 
@@ -1061,6 +1129,7 @@
    "oldfieldtype": "Read Only", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1085,6 +1154,7 @@
    "oldfieldtype": "Read Only", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1108,6 +1178,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1132,6 +1203,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1155,6 +1227,7 @@
    "no_copy": 0, 
    "permlevel": 1, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1177,6 +1250,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1199,6 +1273,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1221,6 +1296,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1243,6 +1319,7 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1265,6 +1342,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1287,6 +1365,7 @@
    "no_copy": 1, 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
    "report_hide": 0, 
    "reqd": 0, 
@@ -1305,7 +1384,8 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 5, 
- "modified": "2015-11-16 06:29:59.828065", 
+ "menu_index": 0, 
+ "modified": "2015-12-23 02:45:19.261689", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "User", 

frappe/core/doctype/user/user.py

@@ -10,6 +10,7 @@ from frappe.desk.notifications import clear_notifications
 from frappe.utils.user import get_system_managers
 import frappe.permissions
 import frappe.share
+import re
 
 STANDARD_USERS = ("Guest", "Administrator")
 
@@ -38,6 +39,8 @@ class User(Document):
 		self.update_gravatar()
 		self.ensure_unique_roles()
 		self.remove_all_roles_for_guest()
+		self.validate_username()
+
 		if self.language == "Loading...":
 			self.language = None
 
@@ -296,6 +299,52 @@ class User(Document):
 			else:
 				exists.append(d.role)
 
+	def validate_username(self):
+		if not self.username and self.is_new():
+			self.username = frappe.scrub(self.first_name)
+
+		if not self.username:
+			return
+
+		# strip space and @
+		self.username = self.username.strip(" @")
+
+		if self.username_exists():
+			frappe.msgprint(_("Username {0} already exists"))
+			self.suggest_username()
+			raise frappe.DuplicateEntryError(self.username)
+
+		if not self.is_new():
+			old_username = self.get_db_value("username")
+			if old_username and self.username != old_username and "System Manager" not in frappe.get_roles():
+				frappe.throw(_("Only a System Manager can change Username"))
+
+		# should be made up of characters, numbers and underscore only
+		if not re.match(r"^[\w]+$", self.username):
+			frappe.throw(_("Username should not contain any special characters other than letters, numbers and underscore"))
+
+	def suggest_username(self):
+		def _check_suggestion(suggestion):
+			if self.username != suggestion and not self.username_exists(suggestion):
+				return suggestion
+
+			return None
+
+		# @firstname
+		username = _check_suggestion(frappe.scrub(self.first_name))
+
+		if not username:
+			# @firstname_last_name
+			username = _check_suggestion(frappe.scrub("{0} {1}".format(self.first_name, self.last_name or "")))
+
+		if username:
+			frappe.msgprint(_("Suggested Username: {0}").format(username))
+
+		return username
+
+	def username_exists(self, username=None):
+		return frappe.db.get_value("User", {"username": username or self.username, "name": ("!=", self.name)})
+
 @frappe.whitelist()
 def get_languages():
 	from frappe.translate import get_lang_dict
@@ -490,3 +539,7 @@ def notifify_admin_access_to_system_manager(login_manager=None):
 		frappe.sendmail(recipients=get_system_managers(), subject=_("Administrator Logged In"),
 			message=message, bulk=True)
 
+def extract_mentions(txt):
+	"""Find all instances of @username in the string.
+	The mentions will be separated by non-word characters or may appear at the start of the string"""
+	return re.findall(r'(?:[^\w]|^)@([\w]*)', txt)

frappe/patches.txt

@@ -109,3 +109,4 @@ frappe.patches.v6_9.rename_burmese_language
 frappe.patches.v6_11.rename_field_in_email_account
 execute:frappe.create_folder(os.path.join(frappe.local.site_path, 'private', 'files'))
 frappe.patches.v6_15.remove_property_setter_for_previous_field
+frappe.patches.v6_15.set_username

frappe/patches/v6_15/set_username.py

@@ -0,0 +1,15 @@
+import frappe
+
+def execute():
+	frappe.reload_doctype("User")
+
+	# give preference to System Users
+	users = frappe.db.sql_list("""select name from `tabUser` order by if(user_type='System User', 0, 1)""")
+	for name in users:
+		user = frappe.get_doc("User", name)
+		if user.username:
+			continue
+
+		username = user.suggest_username()
+		if username:
+			user.db_set("username", username, update_modified=False)

frappe/public/js/frappe/form/footer/timeline.html

@@ -4,6 +4,7 @@
         <div>
     		<textarea style="height: 80px" style="margin-top: 10px;"
     			class="form-control"></textarea>
+			<input type="data" class="hidden mention-input">
         </div>
         <div class="media">
         	<span class="pull-left avatar avatar-medium">

frappe/public/js/frappe/form/footer/timeline.js

@@ -40,7 +40,10 @@ frappe.ui.form.Comments = Class.extend({
 		this.list.on("click", ".toggle-blockquote", function() {
 			$(this).parent().siblings("blockquote").toggleClass("hidden");
 		});
+
+		this.setup_mentions();
 	},
+
 	refresh: function(scroll_to_end) {
 		var me = this;
 
@@ -66,6 +69,7 @@ frappe.ui.form.Comments = Class.extend({
 		this.frm.sidebar.refresh_comments();
 
 	},
+
 	render_comment: function(c) {
 		var me = this;
 		this.prepare_comment(c);
@@ -310,5 +314,155 @@ frappe.ui.form.Comments = Class.extend({
 		});
 
 		return last_email;
+	},
+
+	setup_mentions: function() {
+		var me = this;
+
+		this.cursor_from = this.cursor_to = 0
+		this.codes = $.ui.keyCode;
+		this.up = $.Event("keydown", {"keyCode": this.codes.UP});
+		this.down = $.Event("keydown", {"keyCode": this.codes.DOWN});
+		this.enter = $.Event("keydown", {"keyCode": this.codes.ENTER});
+
+		this.setup_autocomplete_for_mentions();
+
+		this.setup_textarea_event();
+	},
+
+	setup_autocomplete_for_mentions: function() {
+		var me = this;
+
+		var username_user_map = {};
+		for (var name in frappe.boot.user_info) {
+			var _user = frappe.boot.user_info[name];
+			username_user_map[_user.username] = _user;
+		}
+
+		this.mention_input = this.wrapper.find(".mention-input");
+
+		this.mention_input.autocomplete({
+			minLength: 0,
+			autoFocus: true,
+			source: Object.keys(username_user_map),
+			select: function(event, ui) {
+				var value = ui.item.value;
+				var textarea_value = me.input.val();
+
+				var new_value = textarea_value.substring(0, me.cursor_from)
+					+ value
+					+ textarea_value.substring(me.cursor_to);
+
+				me.input.val(new_value);
+
+				var new_cursor_location = me.cursor_from + value.length;
+
+				// move cursor to right position
+				if (me.input[0].setSelectionRange) {
+					me.input.focus();
+					me.input[0].setSelectionRange(new_cursor_location, new_cursor_location);
+
+				} else if (me.input[0].createTextRange) {
+					var range = input[0].createTextRange();
+					range.collapse(true);
+					range.moveEnd('character', new_cursor_location);
+					range.moveStart('character', new_cursor_location);
+					range.select();
+
+				} else {
+					me.input.focus();
+				}
+			}
+		});
+
+		this.mention_widget = this.mention_input.autocomplete("widget");
+
+		this.autocomplete_open = false;
+		this.mention_input
+			.on('autocompleteclose', function() {
+				me.autocomplete_open = false;
+			})
+			.on('autocompleteopen', function() {
+				me.autocomplete_open = true;
+			});
+
+		// dirty hack to prevent backspace from navigating back to history
+		$(document).on("keydown", function(e) {
+			if (e.which===me.codes.BACKSPACE && me.autocomplete_open && document.activeElement==me.mention_widget.get(0)) {
+				// me.input.focus();
+
+				return false;
+			}
+		});
+	},
+
+	setup_textarea_event: function() {
+		var me = this;
+
+		// binding this in keyup to get the value after it is set in textarea
+		this.input.keyup(function(e) {
+			if (e.which===16) {
+				// don't trigger for shift
+				return;
+
+			} else if ([me.codes.UP, me.codes.DOWN].indexOf(e.which)!==-1) {
+				// focus on autocomplete if up and down arrows
+				if (me.autocomplete_open) {
+					me.mention_widget.focus();
+					me.mention_widget.trigger(e.which===me.codes.UP ? me.up : me.down);
+				}
+				return;
+
+			} else if ([me.codes.ENTER, me.codes.ESCAPE, me.codes.TAB, me.codes.SPACE].indexOf(e.which)!==-1) {
+				me.mention_input.autocomplete("close");
+				return;
+
+			} else if (e.which !== 0 && !e.ctrlKey && !e.metaKey && !e.altKey) {
+				if(!String.fromCharCode(e.which)) {
+					// no point in parsing it if it is not a character key
+					return;
+				}
+			}
+
+			var value = $(this).val() || "";
+			var i = e.target.selectionStart;
+			var key = value[i-1];
+			var substring = value.substring(0, i);
+			var mention = substring.match(/(?=[^\w]|^)@([\w]*)$/);
+
+			if (mention && mention.length) {
+				var mention = mention[0].slice(1);
+
+				// record location of cursor
+				me.cursor_from = i - mention.length;
+				me.cursor_to = i;
+
+				// render autocomplete at the bottom of the textbox and search for mention
+				me.mention_input.autocomplete("option", "position", {
+					of: me.input,
+					my: "left top",
+					at: "left bottom"
+				});
+				me.mention_input.autocomplete("search", mention);
+
+			} else {
+				me.cursor_from = me.cursor_to = 0;
+				me.mention_input.autocomplete("close");
+			}
+		});
+
+		// binding this in keydown to prevent default action
+		this.input.keydown(function(e) {
+			// enter, escape, tab
+			if (me.autocomplete_open) {
+				if ([me.codes.ENTER, me.codes.TAB].indexOf(e.which)!==-1) {
+					// set focused value
+					me.mention_widget.trigger(me.enter);
+
+					// prevent default
+					return false;
+				}
+			}
+		});
 	}
 });

frappe/templates/emails/mentioned_in_comment.html

@@ -0,0 +1,7 @@
+<p>
+	{{ _("{0} mentioned you in a comment in {1}").format(sender_fullname, link) }}
+</p>
+<blockquote
+	style="border-left: 3px solid #d1d8dd; padding: 7px 15px; margin-left: 0px;">
+	{{ comment.comment | markdown }}
+</blockquote>