kojiapi: add koji target to composes

So far, composes created by kojiapi didn't have any targets. This commit
adds the koji target to them.

This is the last piece of the puzzle. From now on, osbuild-composer has
a koji API, which is actually able to upload images to Koji! Yay!

internal/kojiapi/server.go

@@ -14,6 +14,7 @@ import (
 	"github.com/osbuild/osbuild-composer/internal/common"
 	"github.com/osbuild/osbuild-composer/internal/distro"
 	"github.com/osbuild/osbuild-composer/internal/rpmmd"
+	"github.com/osbuild/osbuild-composer/internal/target"
 	"github.com/osbuild/osbuild-composer/internal/worker"
 )
 
@@ -69,6 +70,7 @@ func (server *Server) PostCompose(w http.ResponseWriter, r *http.Request) {
 
 	type imageRequest struct {
 		manifest distro.Manifest
+		filename string
 	}
 	imageRequests := make([]imageRequest, len(request.ImageRequests))
 
@@ -113,6 +115,7 @@ func (server *Server) PostCompose(w http.ResponseWriter, r *http.Request) {
 		}
 
 		imageRequests[i].manifest = manifest
+		imageRequests[i].filename = imageType.Filename()
 	}
 
 	var ir imageRequest
@@ -123,7 +126,15 @@ func (server *Server) PostCompose(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "Only single-image composes are currently supported", http.StatusBadRequest)
 		return
 	}
-	id, err := server.workers.Enqueue(ir.manifest, nil)
+	id, err := server.workers.Enqueue(ir.manifest, []*target.Target{
+		target.NewKojiTarget(&target.KojiTargetOptions{
+			BuildID:         uint64(request.Koji.BuildId),
+			Token:           request.Koji.Token,
+			Filename:        ir.filename,
+			UploadDirectory: "osbuild-composer-koji-" + uuid.New().String(),
+			Server:          request.Koji.Server,
+		}),
+	})
 	if err != nil {
 		// This is a programming errror.
 		panic(err)

internal/target/koji_target.go

@@ -1,6 +1,8 @@
 package target
 
 type KojiTargetOptions struct {
+	BuildID         uint64 `json:"build_id"`
+	Token           string `json:"token"`
 	Filename        string `json:"filename"`
 	UploadDirectory string `json:"upload_directory"`
 	Server          string `json:"server"`