Is User connected to an internet connection ? Show a failed Synchronisation Toast Select locally saved Trips Number of saved locally trip ? 0 1 > 1 false true Show a failed Synchronisation Toast Show a failed Synchronisation Toast Select trips from the cloud Number of saved remotely trip ? 0 Start Synchronisation and push the local trip into the cloud >=1 Does the local trip already exist in the cloud ? true false Abort Synchronisation as the trip have already saved before Start Synchronisation and push the local trip into the cloud