feat: pull request generation

internal/adapter/gitea/forge.go

@@ -16,6 +16,128 @@ type Forge struct {
 	client *gitea.Client
 }
 
+// UpdatePullRequest implements port.Forge.
+func (f *Forge) UpdatePullRequest(ctx context.Context, rawProjectID string, rawPullRequestID string, title string, body string) (string, error) {
+	project, err := f.getProject(rawProjectID)
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	pullRequestID, err := strconv.ParseInt(rawPullRequestID, 10, 64)
+	if err != nil {
+		return "", errors.Wrapf(err, "could not parse pull request id '%v'", rawPullRequestID)
+	}
+
+	pr, _, err := f.client.EditPullRequest(project.Owner.UserName, project.Name, pullRequestID, gitea.EditPullRequestOption{
+		Title: title,
+		Body:  body,
+	})
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return pr.HTMLURL, nil
+}
+
+// GetPullRequestTemplate implements port.Forge.
+func (f *Forge) GetPullRequestTemplate(ctx context.Context, rawProjectID string) (string, error) {
+	data, err := f.GetFile(ctx, rawProjectID, ".gitea/pull_request_template.md")
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return string(data), nil
+}
+
+// GetPullRequests implements port.Forge.
+func (f *Forge) GetPullRequests(ctx context.Context, rawProjectID string, pullRequestIDs ...string) ([]*model.PullRequest, error) {
+	project, err := f.getProject(rawProjectID)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	pullRequests := make([]*model.PullRequest, 0)
+	for _, rawID := range pullRequestIDs {
+		id, err := strconv.ParseInt(rawID, 10, 64)
+		if err != nil {
+			return nil, errors.Wrapf(err, "could not parse pull request id '%v'", rawID)
+		}
+
+		pr, _, err := f.client.GetPullRequest(project.Owner.UserName, project.Name, id)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		pullRequests = append(pullRequests, &model.PullRequest{
+			ID:    strconv.FormatInt(pr.ID, 10),
+			Title: pr.Title,
+			Body:  pr.Body,
+		})
+	}
+
+	return pullRequests, nil
+}
+
+// GetPullRequestDiff implements port.Forge.
+func (f *Forge) GetPullRequestDiff(ctx context.Context, rawProjectID string, rawPullRequestID string) (string, error) {
+	project, err := f.getProject(rawProjectID)
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	pullRequestID, err := strconv.ParseInt(rawPullRequestID, 10, 64)
+	if err != nil {
+		return "", errors.Wrapf(err, "could not parse pull request id '%v'", rawPullRequestID)
+	}
+
+	diff, _, err := f.client.GetPullRequestDiff(project.Owner.UserName, project.Name, pullRequestID, gitea.PullRequestDiffOptions{
+		Binary: false,
+	})
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return string(diff), nil
+}
+
+// ListOpenedPullRequests implements port.Forge.
+func (f *Forge) ListOpenedPullRequests(ctx context.Context, rawProjectID string) ([]*model.PullRequest, error) {
+	project, err := f.getProject(rawProjectID)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	pullRequests := make([]*model.PullRequest, 0)
+
+	page := 1
+	for {
+		repoPullRequests, res, err := f.client.ListRepoPullRequests(project.Owner.UserName, project.Name, gitea.ListPullRequestsOptions{
+			State: gitea.StateOpen,
+			ListOptions: gitea.ListOptions{
+				Page:     page,
+				PageSize: 100,
+			},
+		})
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		for _, pr := range repoPullRequests {
+			pullRequests = append(pullRequests, &model.PullRequest{
+				ID:    strconv.FormatInt(pr.Index, 10),
+				Title: pr.Title,
+				Body:  pr.Body,
+			})
+		}
+
+		if res.NextPage == 0 {
+			return pullRequests, nil
+		}
+
+		page = res.NextPage
+	}
+}
+
 // GetFile implements port.Forge.
 func (f *Forge) GetFile(ctx context.Context, rawProjectID string, path string) ([]byte, error) {
 	project, err := f.getProject(rawProjectID)
@@ -132,8 +254,8 @@ func (f *Forge) GetIssues(ctx context.Context, rawProjectID string, issueIDs ...
 	return issues, nil
 }
 
-// GetAllProjects implements port.Forge.
-func (f *Forge) GetAllProjects(ctx context.Context) ([]*model.Project, error) {
+// ListProjects implements port.Forge.
+func (f *Forge) ListProjects(ctx context.Context) ([]*model.Project, error) {
 	projects := make([]*model.Project, 0)
 
 	page := 1