[minor] option in auto email report to send if data

frappe/email/doctype/auto_email_report/auto_email_report.json

@@ -93,6 +93,33 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "default": "1", 
+   "fieldname": "send_if_data", 
+   "fieldtype": "Check", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_list_view": 0, 
+   "label": "Send only if there is any data", 
+   "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": 0
+  }, 
   {
    "allow_on_submit": 0, 
    "bold": 0, 
@@ -475,7 +502,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2016-09-22 07:54:01.020149", 
+ "modified": "2016-09-23 01:06:56.963190", 
  "modified_by": "Administrator", 
  "module": "Email", 
  "name": "Auto Email Report", 

frappe/email/doctype/auto_email_report/auto_email_report.py

@@ -44,6 +44,9 @@ class AutoEmailReport(Document):
 		report = frappe.get_doc('Report', self.report)
 		raw = report.get_data(limit=self.no_of_rows or 100, user = self.user, filters = self.filters)
 
+		if len(raw)==1 and self.send_if_data:
+			return None
+
 		if self.format == 'HTML':
 			return self.get_html_table(raw)
 
@@ -67,6 +70,9 @@ class AutoEmailReport(Document):
 
 	def send(self):
 		data = self.get_report_content()
+		if not data:
+			return
+
 		attachments = None
 		message = '<p>{0}</p>'.format(_('{0} generated on {1}')\
 				.format(frappe.bold(self.name),
@@ -99,6 +105,10 @@ def download(name):
 	auto_email_report.check_permission()
 	data = auto_email_report.get_report_content()
 
+	if not data:
+		frappe.msgprint(_('No Data'))
+		return
+
 	frappe.local.response.filecontent = data
 	frappe.local.response.type = "download"
 	frappe.local.response.filename = auto_email_report.get_file_name()