Update branch API endpoint to show effective branch protection.

models/branches.go

@@ -242,6 +242,11 @@ func (repo *Repository) GetProtectedBranches() ([]*ProtectedBranch, error) {
 	return protectedBranches, x.Find(&protectedBranches, &ProtectedBranch{RepoID: repo.ID})
 }
 
+// GetBranchProtection get the branch protection of a branch
+func (repo *Repository) GetBranchProtection(branchName string) (*ProtectedBranch, error) {
+	return GetProtectedBranchBy(repo.ID, branchName)
+}
+
 // IsProtectedBranch checks if branch is protected
 func (repo *Repository) IsProtectedBranch(branchName string, doer *User) (bool, error) {
 	if doer == nil {

modules/convert/convert.go

@@ -30,10 +30,24 @@ func ToEmail(email *models.EmailAddress) *api.Email {
 }
 
 // ToBranch convert a git.Commit and git.Branch to an api.Branch
-func ToBranch(repo *models.Repository, b *git.Branch, c *git.Commit) *api.Branch {
+func ToBranch(repo *models.Repository, b *git.Branch, c *git.Commit, bp *models.ProtectedBranch, user *models.User) *api.Branch {
+	if bp == nil {
+		return &api.Branch{
+			Name:              b.Name,
+			Commit:            ToCommit(repo, c),
+			Protected:         false,
+			RequiredApprovals: 0,
+			UserCanPush:       true,
+			UserCanMerge:      true,
+		}
+	}
 	return &api.Branch{
-		Name:   b.Name,
-		Commit: ToCommit(repo, c),
+		Name:              b.Name,
+		Commit:            ToCommit(repo, c),
+		Protected:         true,
+		RequiredApprovals: bp.RequiredApprovals,
+		UserCanPush:       bp.CanUserPush(user.ID),
+		UserCanMerge:      bp.CanUserMerge(user.ID),
 	}
 }
 

modules/structs/repo_branch.go

@@ -6,6 +6,10 @@ package structs
 
 // Branch represents a repository branch
 type Branch struct {
-	Name   string         `json:"name"`
-	Commit *PayloadCommit `json:"commit"`
+	Name              string         `json:"name"`
+	Commit            *PayloadCommit `json:"commit"`
+	Protected         bool           `json:"protected"`
+	RequiredApprovals int64          `json:"required_approvals"`
+	UserCanPush       bool           `json:"user_can_push"`
+	UserCanMerge      bool           `json:"user_can_merge"`
 }

routers/api/v1/repo/branch.go

@@ -16,7 +16,7 @@ import (
 func GetBranch(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/branches/{branch} repository repoGetBranch
 	// ---
-	// summary: Retrieve a specific branch from a repository
+	// summary: Retrieve a specific branch from a repository, including its effective branch protection
 	// produces:
 	// - application/json
 	// parameters:
@@ -61,7 +61,13 @@ func GetBranch(ctx *context.APIContext) {
 		return
 	}
 
-	ctx.JSON(200, convert.ToBranch(ctx.Repo.Repository, branch, c))
+	branchProtection, err := ctx.Repo.Repository.GetBranchProtection(ctx.Repo.BranchName)
+	if err != nil {
+		ctx.Error(500, "GetBranchProtection", err)
+		return
+	}
+
+	ctx.JSON(200, convert.ToBranch(ctx.Repo.Repository, branch, c, branchProtection, ctx.User))
 }
 
 // ListBranches list all the branches of a repository
@@ -98,7 +104,12 @@ func ListBranches(ctx *context.APIContext) {
 			ctx.Error(500, "GetCommit", err)
 			return
 		}
-		apiBranches[i] = convert.ToBranch(ctx.Repo.Repository, branches[i], c)
+		branchProtection, err := ctx.Repo.Repository.GetBranchProtection(branches[i].Name)
+		if err != nil {
+			ctx.Error(500, "GetBranchProtection", err)
+			return
+		}
+		apiBranches[i] = convert.ToBranch(ctx.Repo.Repository, branches[i], c, branchProtection, ctx.User)
 	}
 
 	ctx.JSON(200, &apiBranches)

templates/swagger/v1_json.tmpl

@@ -1492,7 +1492,7 @@
         "tags": [
           "repository"
         ],
-        "summary": "Retrieve a specific branch from a repository",
+        "summary": "Retrieve a specific branch from a repository, including its effective branch protection",
         "operationId": "repoGetBranch",
         "parameters": [
           {
@@ -7586,6 +7586,23 @@
         "name": {
           "type": "string",
           "x-go-name": "Name"
+        },
+        "protected": {
+          "type": "boolean",
+          "x-go-name": "Protected"
+        },
+        "required_approvals": {
+          "type": "integer",
+          "format": "int64",
+          "x-go-name": "RequiredApprovals"
+        },
+        "user_can_merge": {
+          "type": "boolean",
+          "x-go-name": "UserCanMerge"
+        },
+        "user_can_push": {
+          "type": "boolean",
+          "x-go-name": "UserCanPush"
         }
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"