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110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package eventstore
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import (
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"encoding/json"
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"reflect"
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"time"
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"github.com/zitadel/zitadel/internal/zerrors"
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)
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type action interface {
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Aggregate() *Aggregate
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// Creator is the userid of the user which created the action
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Creator() string
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// Type describes the action
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Type() EventType
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// Revision of the action
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Revision() uint16
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}
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// Command is the intend to store an event into the eventstore
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type Command interface {
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action
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// Payload returns the payload of the event. It represent the changed fields by the event
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// valid types are:
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// * nil: no payload
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// * struct: which can be marshalled to json
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// * pointer: to struct which can be marshalled to json
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// * []byte: json marshalled data
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Payload() any
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// UniqueConstraints should be added for unique attributes of an event, if nil constraints will not be checked
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UniqueConstraints() []*UniqueConstraint
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// Fields should be added for fields which should be indexed for lookup, if nil fields will not be indexed
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Fields() []*FieldOperation
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}
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// Event is a stored activity
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type Event interface {
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action
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// Sequence of the event in the aggregate
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Sequence() uint64
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// CreatedAt is the time the event was created at
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CreatedAt() time.Time
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// Position is the global position of the event
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Position() float64
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// Unmarshal parses the payload and stores the result
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// in the value pointed to by ptr. If ptr is nil or not a pointer,
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// Unmarshal returns an error
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Unmarshal(ptr any) error
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// Deprecated: only use for migration
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DataAsBytes() []byte
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}
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type EventType string
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func EventData(event Command) ([]byte, error) {
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switch data := event.Payload().(type) {
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case nil:
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return nil, nil
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case []byte:
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if json.Valid(data) {
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return data, nil
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}
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return nil, zerrors.ThrowInvalidArgument(nil, "V2-6SbbS", "data bytes are not json")
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}
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dataType := reflect.TypeOf(event.Payload())
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if dataType.Kind() == reflect.Ptr {
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dataType = dataType.Elem()
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}
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if dataType.Kind() == reflect.Struct {
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dataBytes, err := json.Marshal(event.Payload())
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if err != nil {
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return nil, zerrors.ThrowInvalidArgument(err, "V2-xG87M", "could not marshal data")
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}
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return dataBytes, nil
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}
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return nil, zerrors.ThrowInvalidArgument(nil, "V2-91NRm", "wrong type of event data")
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}
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type BaseEventSetter[T any] interface {
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Event
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SetBaseEvent(*BaseEvent)
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*T
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}
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func GenericEventMapper[T any, PT BaseEventSetter[T]](event Event) (Event, error) {
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e := PT(new(T))
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e.SetBaseEvent(BaseEventFromRepo(event))
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err := event.Unmarshal(e)
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if err != nil {
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return nil, zerrors.ThrowInternal(err, "ES-Thai6", "unable to unmarshal event")
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}
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return e, nil
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}
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func isEventTypes(command Command, types ...EventType) bool {
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for _, typ := range types {
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if command.Type() == typ {
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return true
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}
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}
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return false
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}
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