inform user when databas is malformed. Fixes #4428

src/common/connection_handlers.py

@@ -1837,6 +1837,12 @@ class ConnectionHandlers(ConnectionVcard, ConnectionBytestream, ConnectionDisco,
 					subject=subject)
 			except exceptions.PysqliteOperationalError, e:
 				self.dispatch('ERROR', (_('Disk Write Error'), str(e)))
+			except exceptions.DatabaseMalformed:
+				pritext = _('Database Error')
+				sectext = _('The database file (%s) cannot be read. Try to repair '
+					'it or remove it (all history will be lost).') % \
+					common.logger.LOG_DB_PATH
+				self.dispatch('ERROR', (pritext, sectext))
 		self.dispatch('MSGERROR', (frm, msg.getErrorCode(), error_msg, msgtxt,
 			tim, session))
 
@@ -1877,6 +1883,12 @@ class ConnectionHandlers(ConnectionVcard, ConnectionBytestream, ConnectionDisco,
 				gajim.logger.write('gc_msg', frm, msgtxt, tim=tim)
 			except exceptions.PysqliteOperationalError, e:
 				self.dispatch('ERROR', (_('Disk Write Error'), str(e)))
+			except exceptions.DatabaseMalformed:
+				pritext = _('Database Error')
+				sectext = _('The database file (%s) cannot be read. Try to repair '
+					'it or remove it (all history will be lost).') % \
+					common.logger.LOG_DB_PATH
+				self.dispatch('ERROR', (pritext, sectext))
 
 	def dispatch_invite_message(self, invite, frm):
 		item = invite.getTag('invite')
@@ -2059,6 +2071,12 @@ class ConnectionHandlers(ConnectionVcard, ConnectionBytestream, ConnectionDisco,
 						gajim.logger.write('gcstatus', who, st, show)
 					except exceptions.PysqliteOperationalError, e:
 						self.dispatch('ERROR', (_('Disk Write Error'), str(e)))
+					except exceptions.DatabaseMalformed:
+						pritext = _('Database Error')
+						sectext = _('The database file (%s) cannot be read. Try to '
+							'repair it or remove it (all history will be lost).') % \
+							common.logger.LOG_DB_PATH
+						self.dispatch('ERROR', (pritext, sectext))
 				if avatar_sha or avatar_sha == '':
 					if avatar_sha == '':
 						# contact has no avatar
@@ -2178,6 +2196,12 @@ class ConnectionHandlers(ConnectionVcard, ConnectionBytestream, ConnectionDisco,
 					gajim.logger.write('status', jid_stripped, status, show)
 				except exceptions.PysqliteOperationalError, e:
 					self.dispatch('ERROR', (_('Disk Write Error'), str(e)))
+				except exceptions.DatabaseMalformed:
+					pritext = _('Database Error')
+					sectext = _('The database file (%s) cannot be read. Try to '
+						'repair it or remove it (all history will be lost).') % \
+						common.logger.LOG_DB_PATH
+					self.dispatch('ERROR', (pritext, sectext))
 			our_jid = gajim.get_jid_from_account(self.name)
 			if jid_stripped == our_jid and resource == self.server_resource:
 				# We got our own presence