move RunService from CLI to the client, print output in the command

internal/cli/client/service.go

@@ -0,0 +1,68 @@
+package client
+
+import (
+	"context"
+	"fmt"
+	"github.com/docker/docker/api/types/container"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+// ServiceOptions contains all the options for creating a service.
+type ServiceOptions struct {
+	Image   string
+	Name    string
+	Machine string
+	Publish []string
+}
+
+type RunServiceResponse struct {
+	ID          string
+	Name        string
+	MachineName string
+}
+
+func (c *Client) RunService(ctx context.Context, opts *ServiceOptions) (RunServiceResponse, error) {
+	var resp RunServiceResponse
+
+	listResp, err := c.ListMachines(ctx, &emptypb.Empty{})
+	if err != nil {
+		return resp, fmt.Errorf("list machines: %w", err)
+	}
+
+	// TODO: find the first available machine (state UP).
+	machineIP, _ := listResp.Machines[0].Machine.Network.ManagementIp.ToAddr()
+	resp.MachineName = listResp.Machines[0].Machine.Name
+	if opts.Machine != "" {
+		for _, m := range listResp.Machines {
+			if m.Machine.Name == opts.Machine || m.Machine.Id == opts.Machine {
+				machineIP, _ = m.Machine.Network.ManagementIp.ToAddr()
+				resp.MachineName = m.Machine.Name
+				break
+			}
+		}
+	}
+
+	md := metadata.Pairs("machines", machineIP.String())
+	ctx = metadata.NewOutgoingContext(ctx, md)
+
+	// TODO: generate a random service ID.
+	resp.ID = "todo-service-id"
+	// TODO: generate a random service name if not specified.
+	resp.Name = opts.Name
+	// TODO: generate a container name from the service name.
+	// TODO: set service labels on the container.
+
+	config := &container.Config{
+		Image: opts.Image,
+	}
+	createResp, err := c.CreateContainer(ctx, config, nil, nil, nil, opts.Name)
+	if err != nil {
+		return resp, fmt.Errorf("create container: %w", err)
+	}
+	if err = c.StartContainer(ctx, createResp.ID, container.StartOptions{}); err != nil {
+		return resp, fmt.Errorf("start container: %w", err)
+	}
+
+	return resp, nil
+}