Working on some basic routes.

build.sbt

@@ -31,7 +31,7 @@ val Deps = new {
 
   val Gs = new {
     val Uuid: ModuleID    = "gs" %% "gs-uuid-v0"         % "0.4.2"
-    val Std: ModuleID     = "gs" %% "gs-std-core-v0"     % "0.1.2"
+    val Std: ModuleID     = "gs" %% "gs-std-core-v0"     % "0.1.3"
     val Datagen: ModuleID = "gs" %% "gs-datagen-core-v0" % "0.4.1"
   }
 
@@ -44,6 +44,13 @@ val Deps = new {
     val EmberServer: ModuleID = "org.http4s" %% "http4s-ember-server" % Version
   }
 
+  val Circe = new {
+    private val Version: String = "0.14.15"
+
+    val Generic: ModuleID = "io.circe" %% "circe-generic" % Version
+    val Literal: ModuleID = "io.circe" %% "circe-literal" % Version
+  }
+
   val Log4Cats = new {
     val Slf4j: ModuleID = "org.typelevel" %% "log4cats-slf4j" % "2.8.0"
   }
@@ -105,6 +112,8 @@ lazy val api = project
       Deps.Http4s.Dsl,
       Deps.Http4s.Circe,
       Deps.Http4s.EmberServer,
+      Deps.Circe.Generic,
+      Deps.Circe.Literal,
       Deps.Log4Cats.Slf4j,
       Deps.LogbackClassic
     )

modules/api/src/main/scala/gs/respite/api/RespiteApi.scala

@@ -4,31 +4,24 @@ import cats.effect.ExitCode
 import cats.effect.IO
 import cats.effect.IOApp
 import com.comcast.ip4s._
-import org.http4s.HttpRoutes
-import org.http4s.Method
-import org.http4s.dsl.io.*
+import gs.respite.db.MemoryKeySpaceDb
 import org.http4s.ember.server.EmberServerBuilder
 import org.typelevel.log4cats.LoggerFactory
 import org.typelevel.log4cats.slf4j.Slf4jFactory
 
 object RespiteApi extends IOApp:
-  given CanEqual[Method, Method]                           = CanEqual.derived
-  given CanEqual[org.http4s.Uri.Path, org.http4s.Uri.Path] = CanEqual.derived
 
   implicit val loggerFactory: LoggerFactory[IO] = Slf4jFactory.create[IO]
 
-  private val RespiteService = HttpRoutes
-    .of[IO] { case GET -> Root =>
-      Ok("Hello, Respite!")
-    }
-    .orNotFound
-
   override def run(args: List[String]): cats.effect.IO[ExitCode] =
-    EmberServerBuilder
-      .default[IO]
-      .withHost(ipv4"0.0.0.0")
-      .withPort(port"8080")
-      .withHttpApp(RespiteService)
-      .build
-      .use(_ => IO.never)
-      .as(ExitCode.Success)
+    for
+      db <- MemoryKeySpaceDb.initialize[IO]
+      exitCode <- EmberServerBuilder
+        .default[IO]
+        .withHost(ipv4"0.0.0.0")
+        .withPort(port"8080")
+        .withHttpApp(new RespiteRoutes[IO](db).app)
+        .build
+        .use(_ => IO.never)
+        .as(ExitCode.Success)
+    yield exitCode

modules/api/src/main/scala/gs/respite/api/RespiteRoutes.scala

@@ -0,0 +1,40 @@
+package gs.respite.api
+
+import cats.effect.Async
+import cats.syntax.all.*
+import gs.respite.api.json.given
+import gs.respite.db.KeySpaceDb
+import gs.respite.model.Key
+import gs.respite.model.Value
+import org.http4s.EntityEncoder
+import org.http4s.HttpApp
+import org.http4s.HttpRoutes
+import org.http4s.Method
+import org.http4s.circe.*
+import org.http4s.dsl.Http4sDsl
+
+final class RespiteRoutes[F[_]: Async](
+  val db: KeySpaceDb[F]
+) extends Http4sDsl[F]:
+  import RespiteRoutes.given
+
+  given EntityEncoder[F, Value] = jsonEncoderOf[Value]
+
+  val app: HttpApp[F] = HttpRoutes
+    .of[F] { case GET -> Root / "default" / key =>
+      for
+        result <- db.default.get(Key.string(key))
+        response <-
+          result match
+            case Some(value) => Ok(value)
+            case _           => NotFound()
+      yield response
+    }
+    .orNotFound
+
+object RespiteRoutes:
+
+  given CanEqual[Method, Method]                           = CanEqual.derived
+  given CanEqual[org.http4s.Uri.Path, org.http4s.Uri.Path] = CanEqual.derived
+
+end RespiteRoutes

modules/api/src/main/scala/gs/respite/api/json/encoders.scala

@@ -0,0 +1,28 @@
+package gs.respite.api.json
+
+import gs.respite.model.BooleanValue
+import gs.respite.model.ByteValue
+import gs.respite.model.DateValue
+import gs.respite.model.Int64Value
+import gs.respite.model.StringValue
+import gs.respite.model.UUIDValue
+import gs.respite.model.Value
+import gs.std.v0.core.Base64Encoder
+import io.circe.Encoder
+import io.circe.literal.*
+
+given Encoder[Value] = Encoder.instance { (value: Value) =>
+  value match
+    case v: StringValue =>
+      json"""{"value": ${v.value}}"""
+    case v: BooleanValue =>
+      json"""{"value": ${v.value}}"""
+    case v: Int64Value =>
+      json"""{"value": ${v.value}}"""
+    case v: UUIDValue =>
+      json"""{"value": ${v.value.withDashes()}}"""
+    case v: DateValue =>
+      json"""{"value": ${v.value}}"""
+    case v: ByteValue =>
+      json"""{"value": ${Base64Encoder.encode(v.value).data}}"""
+}