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Add GetAll module #14

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Apr 27, 2021
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60 changes: 60 additions & 0 deletions src/Get.fs
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ open SqlStreamStore.Streams

module Get =

// A function to help wit type inference in this module
let private curriedMap : (ReadStreamPage -> 'a) -> AsyncResult<ReadStreamPage, exn> -> AsyncResult<'a, exn> =
AsyncResult.map

Expand Down Expand Up @@ -37,6 +38,39 @@ module Get =
let nextStreamVersion =
curriedMap (fun page -> page.NextStreamVersion)

let nextStreamPage =
AsyncResult.bind (fun (page: ReadStreamPage) -> page.ReadNext |> AsyncResult.ofTask)

module GetAll =

// A function to help wit type inference in this module
let private curriedMap : (ReadAllPage -> 'a) -> AsyncResult<ReadAllPage, exn> -> AsyncResult<'a, exn> =
AsyncResult.map

let messages =
curriedMap (fun page -> page.Messages |> Array.toList)

let messagesData =
messages
>> AsyncResult.bind (List.traverseAsyncResultM (fun msg -> msg.GetJsonData()))

let messagesDataAs<'data> =
messages
>> AsyncResult.bind (List.traverseAsyncResultM (fun msg -> msg.GetJsonDataAs<'data>()))

let direction = curriedMap (fun page -> page.Direction)

let fromPosition =
curriedMap (fun page -> page.FromPosition)

let isEnd = curriedMap (fun page -> page.IsEnd)

let nextPosition =
curriedMap (fun page -> page.NextPosition)

let nextAllStreamPage =
AsyncResult.bind (fun (page: ReadAllPage) -> page.ReadNext |> AsyncResult.ofTask)


namespace SqlStreamStore.FSharp.EventSourcing

Expand All @@ -59,6 +93,10 @@ module Get =
events<'event>
>> AsyncResult.bind (List.traverseAsyncResultM (fun event -> event.data))

let eventDataAsString<'event> =
events<'event>
>> AsyncResult.bind (List.traverseAsyncResultM (fun event -> event.dataAsString))

let eventsAndEventsData<'event> =
fun (page: AsyncResult<ReadStreamPage, exn>) ->
asyncResult {
Expand All @@ -67,6 +105,28 @@ module Get =
return List.zip events' data
}

module GetAll =
let events<'event> =
GetAll.messages
>> Async.map (
Result.bind (
List.filter (fun msg -> Seq.contains msg.Type (getEventUnionCases<'event> ()))
>> List.traverseResultM StreamEvent.ofStreamMessage<'event>
)
)

let eventsData<'event> =
events<'event>
>> AsyncResult.bind (List.traverseAsyncResultM (fun event -> event.data))

let eventDataAsString<'event> =
events<'event>
>> AsyncResult.bind (List.traverseAsyncResultM (fun event -> event.dataAsString))

let eventsAndEventsData<'event> =
fun (page: AsyncResult<ReadAllPage, exn>) ->
asyncResult {
let! events' = events<'event> page
let! data = List.traverseAsyncResultM (fun event -> event.data) events'
return List.zip events' data
}
36 changes: 18 additions & 18 deletions src/SqlStreamStore.FSharp.fsproj
Original file line number Diff line number Diff line change
Expand Up @@ -10,26 +10,26 @@
<PackageLicenseExpression>MIT</PackageLicenseExpression>
<PackageTags>SqlStreamStore; FSharp; postgresql; cqrs; event-sourcing; event-store; stream-store</PackageTags>
</PropertyGroup>

<ItemGroup>
<PackageReference Update="FSharp.Core" Version="5.0.0" />
<PackageReference Include="FSharp.Prelude" Version="3.0.0" />
<PackageReference Include="FSharp.SystemTextJson" Version="0.16.6" />
<PackageReference Include="Npgsql" Version="5.0.4" />
<PackageReference Include="SqlStreamStore" Version="1.2.0-beta.8" />
<PackageReference Include="SqlStreamStore.Postgres" Version="1.2.0-beta.8" />
<PackageReference Update="FSharp.Core" Version="5.0.0"/>
<PackageReference Include="FSharp.Prelude" Version="3.0.0"/>
<PackageReference Include="FSharp.SystemTextJson" Version="0.16.6"/>
<PackageReference Include="Npgsql" Version="5.0.4"/>
<PackageReference Include="SqlStreamStore" Version="1.2.0-beta.8"/>
<PackageReference Include="SqlStreamStore.Postgres" Version="1.2.0-beta.8"/>
</ItemGroup>

<ItemGroup>
<Compile Include="Infrastructure.fs" />
<Compile Include="SqlStreamStoreExtensions.fs" />
<Compile Include="StreamEvent.fs" />
<Compile Include="Create.fs" />
<Compile Include="Connect.fs" />
<Compile Include="Append.fs" />
<Compile Include="Read.fs" />
<Compile Include="Get.fs" />
<Compile Include="Subscribe.fs" />
<Compile Include="Infrastructure.fs"/>
<Compile Include="SqlStreamStoreExtensions.fs"/>
<Compile Include="StreamEvent.fs"/>
<Compile Include="Create.fs"/>
<Compile Include="Connect.fs"/>
<Compile Include="Append.fs"/>
<Compile Include="Read.fs"/>
<Compile Include="Get.fs"/>
<Compile Include="Subscribe.fs"/>
</ItemGroup>

</Project>
3 changes: 1 addition & 2 deletions src/SqlStreamStoreExtensions.fs
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@ module SqlStreamExtensions =
let private getJsonDataAs<'a> (streamMessage: StreamMessage) =
asyncResult {
let! json = getJsonData streamMessage
return JayJson.decode<'a> json
return! JayJson.decode<'a> json
}

type StreamMessage with
Expand Down Expand Up @@ -264,7 +264,6 @@ module SqlStreamExtensions =

readStreamForwards this streamId fromVersionInclusive' maxCount' prefetch' cancellationToken'


/// Lists Streams in SQLStreamStore.
/// Defaults: maxCount = 1000, continuationToken = null
member this.ListStreams(?maxCount: int, ?continuationToken: string) =
Expand Down