(dsl): Support create and upsert requests

modules/library/src/main/scala/zio/elasticsearch/Document.scala

@@ -0,0 +1,15 @@
+package zio.elasticsearch
+
+import zio.schema.Schema
+import zio.schema.codec.JsonCodec.JsonDecoder
+import zio.schema.codec.{DecodeError, JsonCodec}
+
+private[elasticsearch] final case class Document(json: String) {
+  def decode[A](implicit schema: Schema[A]): Either[DecodeError, A] = JsonDecoder.decode(schema, json)
+}
+
+private[elasticsearch] object Document {
+  def from[A](doc: A)(implicit schema: Schema[A]): Document = Document(
+    JsonCodec.jsonEncoder(schema).encodeJson(doc, indent = None).toString
+  )
+}

modules/library/src/main/scala/zio/elasticsearch/ElasticError.scala

@@ -8,9 +8,9 @@ object ElasticError {
 
   object DocumentRetrievingError {
 
-    final case object DocumentNotFound extends DocumentRetrievingError
-
     final case class DecoderError(reason: String) extends DocumentRetrievingError
 
+    final case object DocumentNotFound extends DocumentRetrievingError
+
   }
 }

modules/library/src/main/scala/zio/elasticsearch/ElasticRequest.scala

@@ -11,8 +11,20 @@ sealed trait ElasticRequest[+A] { self =>
 
 object ElasticRequest {
 
-  private[elasticsearch] final case class Map[A, B](request: ElasticRequest[A], mapper: A => B)
-      extends ElasticRequest[B]
+  def create[A: Schema](
+    index: IndexName,
+    id: DocumentId,
+    doc: A,
+    routing: Option[Routing] = None
+  ): ElasticRequest[Unit] =
+    Create(index, Some(id), Document.from(doc), routing)
+
+  def create[A: Schema](
+    index: IndexName,
+    doc: A,
+    routing: Option[Routing]
+  ): ElasticRequest[Unit] =
+    Create(index, None, Document.from(doc), routing)
 
   def getById[A: Schema](
     index: IndexName,
@@ -24,10 +36,34 @@ object ElasticRequest {
       case None           => Left(DocumentNotFound)
     }
 
+  def upsert[A: Schema](
+    index: IndexName,
+    id: DocumentId,
+    doc: A,
+    routing: Option[Routing] = None
+  ): ElasticRequest[Unit] =
+    CreateOrUpdate(index, id, Document.from(doc), routing)
+
+  private[elasticsearch] final case class Create(
+    index: IndexName,
+    id: Option[DocumentId],
+    document: Document,
+    routing: Option[Routing] = None
+  ) extends ElasticRequest[Unit]
+
+  private[elasticsearch] final case class CreateOrUpdate(
+    index: IndexName,
+    id: DocumentId,
+    document: Document,
+    routing: Option[Routing] = None
+  ) extends ElasticRequest[Unit]
+
   private[elasticsearch] final case class GetById(
     index: IndexName,
     id: DocumentId,
     routing: Option[Routing] = None
   ) extends ElasticRequest[Option[Document]]
 
+  private[elasticsearch] final case class Map[A, B](request: ElasticRequest[A], mapper: A => B)
+      extends ElasticRequest[B]
 }