[minor] expire notification in popup note

frappe/boot.py

@@ -168,6 +168,6 @@ def load_print_css(bootinfo, print_settings):
 
 def get_unseen_notes():
 	return frappe.db.sql('''select name, title, content from tabNote where notify_on_login=1
-		and %s not in
+		and expire_notification_on > %s and %s not in
 			(select user from `tabNote Seen By` nsb
-				where nsb.parent=tabNote.name)''', frappe.session.user, as_dict=True)
+				where nsb.parent=tabNote.name)''', (frappe.utils.now(), frappe.session.user), as_dict=True)

frappe/desk/doctype/note/note.json

@@ -89,6 +89,33 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "depends_on": "eval:doc.notify_on_login && doc.public", 
+   "fieldname": "expire_notification_on", 
+   "fieldtype": "Date", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_list_view": 0, 
+   "label": "Expire Notification On", 
+   "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": 1, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
   {
    "allow_on_submit": 0, 
    "bold": 1, 
@@ -180,7 +207,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2016-08-29 06:00:27.360336", 
+ "modified": "2016-08-30 00:28:57.094889", 
  "modified_by": "Administrator", 
  "module": "Desk", 
  "name": "Note", 

frappe/desk/doctype/note/note.py

@@ -11,6 +11,12 @@ class Note(Document):
 		import re
 		self.name = re.sub("[%'\"#*?`]", "", self.title.strip())
 
+	def validate(self):
+		if self.notify_on_login and not self.expire_notification_on:
+
+			# expire this notification in a week (default)
+			self.expire_notification_on = frappe.utils.add_days(self.creation, 7)
+
 	def before_print(self):
 		self.print_heading = self.name
 		self.sub_heading = ""