```mermaid
flowchart TD
    receiveTracking(["Receive Tracking"])
    findContainerAndShipment["SELECT container JOIN Shipment"]
    updateShipment[/Update shipment\]
    isArrivingSoon{{"Is arrival estimate between now and now + 24h?"}}
    hasArrived{{"Is arrival estimate <=now?"}}
    isDelayed{{Is arrival estimate > original arrival + 24h?}}
    sendNotification[/Send notification\]

    
    receiveTracking -- "`
    **Tracking data**
carrierName:**string**
destinationUnLoCode:**string**
departureDate:**string[_datetime_]**
arrivalDateEstimate:**string[_datetime_]**
containerNumber:**string**
`" -->  findContainerAndShipment
    findContainerAndShipment --> |WHERE containers.containerNumber = :trackingData.containerNumber| updateShipment
    updateShipment --> isArrivingSoon & hasArrived & isDelayed
    isDelayed -->|set delayed flag| sendNotification
    hasArrived  --> |set has arrived flag| sendNotification
    isArrivingSoon -->|set is arriving soon flag| sendNotification
    
%%    isArrivingSoon -->|yes| sendArriveSoon
```

```mermaid
flowchart
    getShipments([Get all shipments])
    
```