feat: add delete branch feature

api/branch.go

@@ -72,5 +72,42 @@ func (h *Handler) CreateBranch(c *gin.Context) {
 		return
 	}
 
-	c.JSON(200, branch)
+	c.JSON(201, branch)
+}
+
+type DeleteBranchUri struct {
+	RepoURI
+	Branch string `uri:"branch" binding:"required"`
+}
+
+// Delete a branch by name
+// @Summary Delete a branch by name.
+func (h *Handler) DeleteBranch(c *gin.Context) {
+	var uri DeleteBranchUri
+	if err := c.ShouldBindUri(&uri); err != nil {
+		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	hsting, err := getHostingFromContext(c)
+	if err != nil {
+		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	err = hsting.DeleteBranch(
+		c.Request.Context(),
+		&hosting.Repository{Owner: uri.Owner, Name: uri.Name},
+		&hosting.Branch{
+			Name: uri.Branch,
+		},
+	)
+	if err != nil {
+		c.AbortWithStatusJSON(http.StatusBadGateway, gin.H{
+			"error": err.Error(),
+		})
+		return
+	}
+
+	c.Status(204)
 }

api/handler.go

@@ -43,6 +43,7 @@ func Routes(r *gin.Engine, h *Handler) {
 	gitRepoApi := r.Group("/repos/:hosting/:owner/:name")
 	gitRepoApi.GET("/branches", h.GetBranches)
 	gitRepoApi.POST("/branches", h.CreateBranch)
+	gitRepoApi.DELETE("/branches/:branch", h.DeleteBranch)
 	gitRepoApi.GET("/commits", h.GetCommits)
 	gitRepoApi.GET("/files", h.GetFiles)
 	gitRepoApi.GET("/files/*path", h.GetFiles)

hosting/hosting.go

@@ -63,6 +63,7 @@ type Hosting interface {
 	GetRepository(ctx context.Context, owner string, repo string) (*Repository, error)
 	GetBranches(ctx context.Context, repo *Repository) ([]Branch, error)
 	CreateBranch(ctx context.Context, repo *Repository, opts *CreateBranchOpts) (*Branch, error)
+	DeleteBranch(ctx context.Context, repo *Repository, branch *Branch) error
 	GetCommits(ctx context.Context, repo *Repository, opts *GetCommitsOpts) ([]Commit, error)
 	GetFiles(ctx context.Context, repo *Repository, path string) (*File, []File, error)
 	GetRawFile(ctx context.Context, repo *Repository, path string) ([]byte, error)

internal/hosting/github/branch.go

@@ -29,6 +29,10 @@ func mapBranchRef(r *github.Reference) *hosting.Branch {
 	return &branch
 }
 
+func getBranchRefFromName(name string) string {
+	return fmt.Sprintf("heads/%v", strings.TrimPrefix(name, "heads/"))
+}
+
 func (h *HostingGithub) GetBranches(ctx context.Context, repo *hosting.Repository) ([]hosting.Branch, error) {
 	githubBranches, _, err := h.client.Repositories.ListBranches(ctx, repo.Owner, repo.Name, &github.BranchListOptions{})
 	if err != nil {
@@ -60,7 +64,7 @@ func (h *HostingGithub) CreateBranch(ctx context.Context, repo *hosting.Reposito
 				return nil, err
 			}
 
-			ref = fmt.Sprintf("heads/%v", githubRepo.GetDefaultBranch())
+			ref = getBranchRefFromName(githubRepo.GetDefaultBranch())
 		}
 
 		commit, _, err := h.client.Git.GetRef(ctx, repo.Owner, repo.Name, ref)
@@ -71,7 +75,7 @@ func (h *HostingGithub) CreateBranch(ctx context.Context, repo *hosting.Reposito
 		githubRef.Object = commit.Object
 	}
 
-	branchRef := fmt.Sprintf("heads/%v", strings.TrimPrefix(*opts.Branch, "heads/"))
+	branchRef := getBranchRefFromName(*opts.Branch)
 	githubRef.Ref = &branchRef
 
 	githubBranchRef, _, err := h.client.Git.CreateRef(ctx, repo.Owner, repo.Name, &githubRef)
@@ -81,3 +85,10 @@ func (h *HostingGithub) CreateBranch(ctx context.Context, repo *hosting.Reposito
 
 	return mapBranchRef(githubBranchRef), nil
 }
+
+func (h *HostingGithub) DeleteBranch(ctx context.Context, repo *hosting.Repository, branch *hosting.Branch) error {
+	branchRef := getBranchRefFromName(branch.Name)
+	_, err := h.client.Git.DeleteRef(ctx, repo.Owner, repo.Name, branchRef)
+
+	return err
+}

internal/hosting/gitlab/branch.go

@@ -59,3 +59,9 @@ func (h *HostingGitlab) CreateBranch(ctx context.Context, repo *hosting.Reposito
 
 	return mapBranch(gitlabBranch), nil
 }
+
+func (h *HostingGitlab) DeleteBranch(ctx context.Context, repo *hosting.Repository, branch *hosting.Branch) error {
+	_, err := h.client.Branches.DeleteBranch(createPid(repo), branch.Name)
+
+	return err
+}