6 replies

Handling Multiple Calendar Services with LayerMap in Effect TypeScript

hello! i am using LayerMap to handle multiple services for one interface, in my case a calendar service and i have a google and outlook implementatio:

export const CalendarServiceLayerMap = LayerMap.Service()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const program = Effect.gen(function*() {
  const calendar = yield* CalendarService.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))
  console.log(yield* calendar.listCalendars())
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

export const CalendarServiceLayerMap = LayerMap.Service()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const program = Effect.gen(function*() {
  const calendar = yield* CalendarService.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))
  console.log(yield* calendar.listCalendars())
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

it works nicely, now for my use case i would need to list calendars of every service, what is the right pattern there?

export const CalendarServiceLayerMap = LayerMap.Service<CalendarServiceLayerMap>()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const listCalendars = Effect.gen(function(){
  const calendar = yield* CalendarService
  return yield* calendar.listCalendars()
})

const program = Effect.gen(function*() {
  const googleCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('google')))
  const outlookCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))

  console.log([...googleCalendars, ...outlookCalendars])
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

export const CalendarServiceLayerMap = LayerMap.Service<CalendarServiceLayerMap>()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const listCalendars = Effect.gen(function(){
  const calendar = yield* CalendarService
  return yield* calendar.listCalendars()
})

const program = Effect.gen(function*() {
  const googleCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('google')))
  const outlookCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))

  console.log([...googleCalendars, ...outlookCalendars])
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

my first guess is to call the list calendar function twice by providing the different layer each time
it works but it's not "simple" and the dx is not that great, having to provide each time the right layer

Handling Multiple Calendar Services with LayerMap in Effect TypeScript

hello! i am using LayerMap to handle multiple services for one interface, in my case a calendar service and i have a google and outlook implementatio:

export const CalendarServiceLayerMap = LayerMap.Service()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const program = Effect.gen(function*() {
  const calendar = yield* CalendarService.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))
  console.log(yield* calendar.listCalendars())
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

export const CalendarServiceLayerMap = LayerMap.Service()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const program = Effect.gen(function*() {
  const calendar = yield* CalendarService.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))
  console.log(yield* calendar.listCalendars())
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

it works nicely, now for my use case i would need to list calendars of every service, what is the right pattern there?

export const CalendarServiceLayerMap = LayerMap.Service<CalendarServiceLayerMap>()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const listCalendars = Effect.gen(function(){
  const calendar = yield* CalendarService
  return yield* calendar.listCalendars()
})

const program = Effect.gen(function*() {
  const googleCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('google')))
  const outlookCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))

  console.log([...googleCalendars, ...outlookCalendars])
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

export const CalendarServiceLayerMap = LayerMap.Service<CalendarServiceLayerMap>()(
    'CalendarServiceLayerMap',
    {
        layers: {
            outlook: OutlookCalendarServiceLayer,
            google: GoogleCalendarServiceLayer,
        },
    },
)

const listCalendars = Effect.gen(function(){
  const calendar = yield* CalendarService
  return yield* calendar.listCalendars()
})

const program = Effect.gen(function*() {
  const googleCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('google')))
  const outlookCalendars = yield* listCalendars.pipe(Effect.provide(CalendarServiceLayerMap.get('outlook')))

  console.log([...googleCalendars, ...outlookCalendars])
}).pipe(Effect.provide(CalendarServiceLayerMap.Default))

Handling Multiple Calendar Services with LayerMap in Effect TypeScript

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