phfroidmont/foyer-dsi-assure-2035
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Move reducer

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Paul-Henri Froidmont 2025-11-04 17:57:44 +01:00
parent 4bd2a1518b
commit 46cb9e014e
Signed by: phfroidmont
GPG key ID: BE948AFD7E7873BE
2 changed files with 11 additions and 10 deletions
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10
core/src/lu/foyer/EventSourcing.scala
View file

@ -12,13 +12,3 @@ trait StateRepository[Data] extends Repository[Entity[Data], String]
trait EventRepository[Data] extends Repository[Event[Data], String]:
def fetchOne(entityId: String, eventId: String): Task[Option[Event[Data]]]
def fetchMany(entityId: String, page: Page): Task[Paged[Event[Data]]]
trait Reducer[Event, State]:
def fromEmpty: PartialFunction[Event, State]
def fromState: PartialFunction[(State, Event), State]
def reduce(event: Event): Option[State] =
fromEmpty.lift(event)
def reduce(state: State, event: Event): Option[State] =
fromState.lift((state, event))

11
core/src/lu/foyer/Reducer.scala Normal file
View file

@ -0,0 +1,11 @@
package lu.foyer
trait Reducer[Event, State]:
def fromEmpty: PartialFunction[Event, State]
def fromState: PartialFunction[(State, Event), State]
def reduce(event: Event): Option[State] =
fromEmpty.lift(event)
def reduce(state: State, event: Event): Option[State] =
fromState.lift((state, event))