feat: handle workspace conflict error

internal/docker/docker.go

@@ -6,6 +6,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/go-connections/nat"
 	"strconv"
+	"strings"
 )
 
 // ContainerSSHHostPort returns the port on the host that is exposing the internal ssh port of the given container info
@@ -33,3 +34,8 @@ func ContainerHostPort(ctx context.Context, container types.ContainerJSON, port
 	}
 	return port
 }
+
+// CleanErrorMessage removes unnecessary parts in a docker sdk error message, such as "Error response from daemon:"
+func CleanErrorMessage(msg string) string {
+	return strings.Replace(msg, "Error response from daemon: ", "", 1)
+}

internal/template/template_manager.go

@@ -14,7 +14,7 @@ import (
 	"github.com/docker/docker/errdefs"
 	"github.com/google/uuid"
 	"github.com/uptrace/bun"
-	"strings"
+	"tesseract/internal/docker"
 	"time"
 )
 
@@ -259,7 +259,7 @@ func (mgr *templateManager) buildTemplate(ctx context.Context, template *templat
 				// the docker sdk returns an error message that looks like:
 				// "Error response from daemon: dockerfile parse error on line 1: unknown instruction: FR (did you mean FROM?)"
 				// we don't want the "error response..." part because it is meaningless
-				message: strings.Replace(err.Error(), "Error response from daemon: ", "", 1),
+				message: docker.CleanErrorMessage(err.Error()),
 			}
 		}
 		return nil, err

internal/workspace/errors.go

@@ -0,0 +1,9 @@
+package workspace
+
+type errWorkspaceExists struct {
+	message string
+}
+
+func (err *errWorkspaceExists) Error() string {
+	return err.message
+}

internal/workspace/http_handlers.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"github.com/labstack/echo/v4"
 	"net/http"
+	"tesseract/internal/apierror"
 )
 
 type createWorkspaceRequestBody struct {
@@ -86,6 +87,12 @@ func createWorkspace(c echo.Context, workspaceName string) error {
 		if errors.Is(err, errImageNotFound) {
 			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("no image with id %v exists", body.ImageID))
 		}
+
+		var errWorkspaceExists *errWorkspaceExists
+		if errors.As(err, &errWorkspaceExists) {
+			return apierror.New(http.StatusBadRequest, "WORKSPACE_EXISTS", errWorkspaceExists.message)
+		}
+
 		return err
 	}
 

internal/workspace/workspace_manager.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/client"
+	"github.com/docker/docker/errdefs"
 	"github.com/docker/go-connections/nat"
 	"github.com/google/uuid"
 	"github.com/uptrace/bun"
@@ -174,6 +175,11 @@ func (mgr workspaceManager) createWorkspace(ctx context.Context, opts createWork
 
 	res, err := mgr.dockerClient.ContainerCreate(ctx, containerConfig, hostConfig, nil, nil, opts.name)
 	if err != nil {
+		if errdefs.IsConflict(err) {
+			return nil, &errWorkspaceExists{
+				message: docker.CleanErrorMessage(err.Error()),
+			}
+		}
 		return nil, err
 	}