cloudapi: Request depsolve from osbuild-worker

and return the response to the client. This uses the worker to depsolve
the requested packages. The result is returned to the client as a list
of packages using the same PackageMetadata schema as the ComposeStatus
response.  It will also time out after 5 minutes and return an error,
using the same timeout constant as depsolving during manifest
generation.

Related: RHEL-60125

internal/cloudapi/v2/handler.go

@@ -1354,3 +1354,52 @@ func uploadStatusFromJobStatus(js *worker.JobStatus, je *clienterrors.Error) Upl
 	}
 	return UploadStatusValueSuccess
 }
+
+// PostDepsolveBlueprint depsolves the packages in a blueprint and returns
+// the results as a list of rpmmd.PackageSpecs
+func (h *apiHandlers) PostDepsolveBlueprint(ctx echo.Context) error {
+	var request DepsolveRequest
+	err := ctx.Bind(&request)
+	if err != nil {
+		return err
+	}
+
+	// Depsolve the requested blueprint
+	// Any errors returned are suitable as a response
+	deps, err := request.Depsolve(h.server.distros, h.server.repos, h.server.workers)
+	if err != nil {
+		return err
+	}
+
+	return ctx.JSON(http.StatusOK,
+		DepsolveResponse{
+			Packages: packageSpecToPackageMetadata(deps),
+		})
+}
+
+// packageSpecToPackageMetadata converts the rpmmd.PackageSpec to PackageMetadata
+// This is used to return package information from the blueprint depsolve request
+// using the common PackageMetadata format from the openapi schema.
+func packageSpecToPackageMetadata(pkgspecs []rpmmd.PackageSpec) []PackageMetadata {
+	packages := make([]PackageMetadata, 0)
+	for _, rpm := range pkgspecs {
+		// Set epoch if it is not 0
+
+		var epoch *string
+		if rpm.Epoch > 0 {
+			epoch = common.ToPtr(strconv.FormatUint(uint64(rpm.Epoch), 10))
+		}
+		packages = append(packages,
+			PackageMetadata{
+				Type:     "rpm",
+				Name:     rpm.Name,
+				Version:  rpm.Version,
+				Release:  rpm.Release,
+				Epoch:    epoch,
+				Arch:     rpm.Arch,
+				Checksum: common.ToPtr(rpm.Checksum),
+			},
+		)
+	}
+	return packages
+}