[API] Pull Requests (#248)

models/error.go

@@ -584,6 +584,28 @@ func (err ErrPullRequestNotExist) Error() string {
 		err.ID, err.IssueID, err.HeadRepoID, err.BaseRepoID, err.HeadBarcnh, err.BaseBranch)
 }
 
+// ErrPullRequestAlreadyExists represents a "PullRequestAlreadyExists"-error
+type ErrPullRequestAlreadyExists struct {
+	ID         int64
+	IssueID    int64
+	HeadRepoID int64
+	BaseRepoID int64
+	HeadBranch string
+	BaseBranch string
+}
+
+// IsErrPullRequestAlreadyExists checks if an error is a ErrPullRequestAlreadyExists.
+func IsErrPullRequestAlreadyExists(err error) bool {
+	_, ok := err.(ErrPullRequestAlreadyExists)
+	return ok
+}
+
+// Error does pretty-printing :D
+func (err ErrPullRequestAlreadyExists) Error() string {
+	return fmt.Sprintf("pull request already exists for these targets [id: %d, issue_id: %d, head_repo_id: %d, base_repo_id: %d, head_branch: %s, base_branch: %s]",
+		err.ID, err.IssueID, err.HeadRepoID, err.BaseRepoID, err.HeadBranch, err.BaseBranch)
+}
+
 // _________                                       __
 // \_   ___ \  ____   _____   _____   ____   _____/  |_
 // /    \  \/ /  _ \ /     \ /     \_/ __ \ /    \   __\

models/issue.go

@@ -170,6 +170,22 @@ func (issue *Issue) HTMLURL() string {
 	return fmt.Sprintf("%s/%s/%d", issue.Repo.HTMLURL(), path, issue.Index)
 }
 
+// DiffURL returns the absolute URL to this diff
+func (issue *Issue) DiffURL() string {
+	if issue.IsPull {
+		return fmt.Sprintf("%s/pulls/%d.diff", issue.Repo.HTMLURL(), issue.Index)
+	}
+	return ""
+}
+
+// PatchURL returns the absolute URL to this patch
+func (issue *Issue) PatchURL() string {
+	if issue.IsPull {
+		return fmt.Sprintf("%s/pulls/%d.patch", issue.Repo.HTMLURL(), issue.Index)
+	}
+	return ""
+}
+
 // State returns string representation of issue status.
 func (issue *Issue) State() api.StateType {
 	if issue.IsClosed {

models/pull.go

@@ -121,7 +121,26 @@ func (pr *PullRequest) LoadIssue() (err error) {
 // Required - Issue
 // Optional - Merger
 func (pr *PullRequest) APIFormat() *api.PullRequest {
+
 	apiIssue := pr.Issue.APIFormat()
+	baseBranch, _ := pr.BaseRepo.GetBranch(pr.BaseBranch)
+	baseCommit, _ := baseBranch.GetCommit()
+	headBranch, _ := pr.HeadRepo.GetBranch(pr.HeadBranch)
+	headCommit, _ := headBranch.GetCommit()
+	apiBaseBranchInfo := &api.PRBranchInfo{
+		Name:       pr.BaseBranch,
+		Ref:        pr.BaseBranch,
+		Sha:        baseCommit.ID.String(),
+		RepoID:     pr.BaseRepoID,
+		Repository: pr.BaseRepo.APIFormat(nil),
+	}
+	apiHeadBranchInfo := &api.PRBranchInfo{
+		Name:       pr.HeadBranch,
+		Ref:        pr.HeadBranch,
+		Sha:        headCommit.ID.String(),
+		RepoID:     pr.HeadRepoID,
+		Repository: pr.HeadRepo.APIFormat(nil),
+	}
 	apiPullRequest := &api.PullRequest{
 		ID:        pr.ID,
 		Index:     pr.Index,
@@ -134,7 +153,12 @@ func (pr *PullRequest) APIFormat() *api.PullRequest {
 		State:     apiIssue.State,
 		Comments:  apiIssue.Comments,
 		HTMLURL:   pr.Issue.HTMLURL(),
+		DiffURL:   pr.Issue.DiffURL(),
+		PatchURL:  pr.Issue.PatchURL(),
 		HasMerged: pr.HasMerged,
+		Base:      apiBaseBranchInfo,
+		Head:      apiHeadBranchInfo,
+		MergeBase: pr.MergeBase,
 	}
 
 	if pr.Status != PullRequestStatusChecking {
@@ -472,6 +496,46 @@ func NewPullRequest(repo *Repository, pull *Issue, labelIDs []int64, uuids []str
 	return nil
 }
 
+// PullRequestsOptions holds the options for PRs
+type PullRequestsOptions struct {
+	Page        int
+	State       string
+	SortType    string
+	Labels      []string
+	MilestoneID int64
+}
+
+func listPullRequestStatement(baseRepoID int64, opts *PullRequestsOptions) *xorm.Session {
+	sess := x.Where("pull_request.base_repo_id=?", baseRepoID)
+
+	sess.Join("INNER", "issue", "pull_request.issue_id = issue.id")
+	switch opts.State {
+	case "closed", "open":
+		sess.And("issue.is_closed=?", opts.State == "closed")
+	}
+
+	return sess
+}
+
+// PullRequests returns all pull requests for a base Repo by the given conditions
+func PullRequests(baseRepoID int64, opts *PullRequestsOptions) ([]*PullRequest, int64, error) {
+	if opts.Page <= 0 {
+		opts.Page = 1
+	}
+
+	countSession := listPullRequestStatement(baseRepoID, opts)
+	maxResults, err := countSession.Count(new(PullRequest))
+	if err != nil {
+		log.Error(4, "Count PRs", err)
+		return nil, maxResults, err
+	}
+
+	prs := make([]*PullRequest, 0, ItemsPerPage)
+	findSession := listPullRequestStatement(baseRepoID, opts)
+	findSession.Limit(ItemsPerPage, (opts.Page-1)*ItemsPerPage)
+	return prs, maxResults, findSession.Find(&prs)
+}
+
 // GetUnmergedPullRequest returnss a pull request that is open and has not been merged
 // by given head/base and repo/branch.
 func GetUnmergedPullRequest(headRepoID, baseRepoID int64, headBranch, baseBranch string) (*PullRequest, error) {
@@ -512,6 +576,26 @@ func GetUnmergedPullRequestsByBaseInfo(repoID int64, branch string) ([]*PullRequ
 		Find(&prs)
 }
 
+// GetPullRequestByIndex returns a pull request by the given index
+func GetPullRequestByIndex(repoID int64, index int64) (*PullRequest, error) {
+	pr := &PullRequest{
+		BaseRepoID: repoID,
+		Index:      index,
+	}
+
+	has, err := x.Get(pr)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrPullRequestNotExist{0, repoID, index, 0, "", ""}
+	}
+
+	pr.LoadAttributes()
+	pr.LoadIssue()
+
+	return pr, nil
+}
+
 func getPullRequestByID(e Engine, id int64) (*PullRequest, error) {
 	pr := new(PullRequest)
 	has, err := e.Id(id).Get(pr)

modules/context/api.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"strings"
 
+	"code.gitea.io/git"
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/log"
@@ -103,3 +104,24 @@ func ExtractOwnerAndRepo() macaron.Handler {
 		ctx.Data["Repository"] = repo
 	}
 }
+
+// ReferencesGitRepo injects the GitRepo into the Context
+func ReferencesGitRepo() macaron.Handler {
+	return func(ctx *APIContext) {
+		// Empty repository does not have reference information.
+		if ctx.Repo.Repository.IsBare {
+			return
+		}
+
+		// For API calls.
+		if ctx.Repo.GitRepo == nil {
+			repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
+			gitRepo, err := git.OpenRepository(repoPath)
+			if err != nil {
+				ctx.Error(500, "RepoRef Invalid repo "+repoPath, err)
+				return
+			}
+			ctx.Repo.GitRepo = gitRepo
+		}
+	}
+}

routers/api/v1/api.go

@@ -167,6 +167,13 @@ func mustEnableIssues(ctx *context.APIContext) {
 	}
 }
 
+func mustAllowPulls(ctx *context.Context) {
+	if !ctx.Repo.Repository.AllowsPulls() {
+		ctx.Status(404)
+		return
+	}
+}
+
 // RegisterRoutes registers all v1 APIs routes to web application.
 // FIXME: custom form error response
 func RegisterRoutes(m *macaron.Macaron) {
@@ -305,6 +312,14 @@ func RegisterRoutes(m *macaron.Macaron) {
 						Delete(reqRepoWriter(), repo.DeleteMilestone)
 				})
 				m.Get("/editorconfig/:filename", context.RepoRef(), repo.GetEditorconfig)
+				m.Group("/pulls", func() {
+					m.Combo("").Get(bind(api.ListPullRequestsOptions{}), repo.ListPullRequests).Post(reqRepoWriter(), bind(api.CreatePullRequestOption{}), repo.CreatePullRequest)
+					m.Group("/:index", func() {
+						m.Combo("").Get(repo.GetPullRequest).Patch(reqRepoWriter(), bind(api.EditPullRequestOption{}), repo.EditPullRequest)
+						m.Combo("/merge").Get(repo.IsPullRequestMerged).Post(reqRepoWriter(), repo.MergePullRequest)
+					})
+
+				}, mustAllowPulls, context.ReferencesGitRepo())
 			}, repoAssignment())
 		}, reqToken())