[GITEA] POST /repos/{owner}/{repo}/pulls/{index}/reviews/{id}/comments

Refs: https://codeberg.org/forgejo/forgejo/issues/2109
(cherry picked from commit 8b4ba3dce7fc99fa328444ef27383dccca49c237)
(cherry picked from commit 196edea0f972a9a027c4cacb9df36330cf676d2f)

[GITEA] POST /repos/{owner}/{repo}/pulls/{index}/reviews/{id}/comments (squash) do not implicitly create a review

If a comment already exists in a review, the comment is added. If it
is the first comment added to a review, it will implicitly create a
new review instead of adding to the existing one.

The pull_service.CreateCodeComment function is responsibe for this
behavior and it will defer to createCodeComment once the review is
determined, either because it was found or because it was created.

Rename createCodeComment into CreateCodeCommentKnownReviewID to expose
it and change the API endpoint to use it instead. Since the review is
provided by the user and verified to exist already, there is no need
for the logic implemented by CreateCodeComment.

The tests are modified to remove the initial comment from the fixture
because it was creating the false positive. I was verified to fail
without this fix.

(cherry picked from commit 6a555996dca6ba71c65818e14ab0eeafa1af6dc2)
(cherry picked from commit b173a0ccee6cc0dadf40ec55e5d88987314c1cc4)
(cherry picked from commit 838ab9740a6b022676103bcb3a7d168b501006e1)

modules/structs/pull_review.go

@@ -89,6 +89,9 @@ type CreatePullReviewComment struct {
 	NewLineNum int64 `json:"new_position"`
 }
 
+// CreatePullReviewCommentOptions are options to create a pull review comment
+type CreatePullReviewCommentOptions CreatePullReviewComment
+
 // SubmitPullReviewOptions are options to submit a pending pull review
 type SubmitPullReviewOptions struct {
 	Event ReviewStateType `json:"event"`

routers/api/v1/api.go

@@ -1228,7 +1228,8 @@ func Routes() *web.Route {
 									Delete(reqToken(), repo.DeletePullReview).
 									Post(reqToken(), bind(api.SubmitPullReviewOptions{}), repo.SubmitPullReview)
 								m.Combo("/comments").
-									Get(repo.GetPullReviewComments)
+									Get(repo.GetPullReviewComments).
+									Post(reqToken(), bind(api.CreatePullReviewCommentOptions{}), repo.CreatePullReviewComment)
 								m.Post("/dismissals", reqToken(), bind(api.DismissPullReviewOptions{}), repo.DismissPullReview)
 								m.Post("/undismissals", reqToken(), repo.UnDismissPullReview)
 							})

routers/api/v1/repo/pull_review.go

@@ -208,6 +208,89 @@ func GetPullReviewComments(ctx *context.APIContext) {
 	ctx.JSON(http.StatusOK, apiComments)
 }
 
+// CreatePullReviewComments add a new comment to a pull request review
+func CreatePullReviewComment(ctx *context.APIContext) {
+	// swagger:operation POST /repos/{owner}/{repo}/pulls/{index}/reviews/{id}/comments repository repoCreatePullReviewComment
+	// ---
+	// summary: Add a new comment to a pull request review
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: index
+	//   in: path
+	//   description: index of the pull request
+	//   type: integer
+	//   format: int64
+	//   required: true
+	// - name: id
+	//   in: path
+	//   description: id of the review
+	//   type: integer
+	//   format: int64
+	//   required: true
+	// - name: body
+	//   in: body
+	//   required: true
+	//   schema:
+	//     "$ref": "#/definitions/CreatePullReviewCommentOptions"
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/PullReviewComment"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	//   "422":
+	//     "$ref": "#/responses/validationError"
+
+	opts := web.GetForm(ctx).(*api.CreatePullReviewCommentOptions)
+
+	review, pr, statusSet := prepareSingleReview(ctx)
+	if statusSet {
+		return
+	}
+
+	if err := pr.Issue.LoadRepo(ctx); err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	line := opts.NewLineNum
+	if opts.OldLineNum > 0 {
+		line = opts.OldLineNum * -1
+	}
+
+	comment, err := pull_service.CreateCodeCommentKnownReviewID(ctx,
+		ctx.Doer,
+		pr.Issue.Repo,
+		pr.Issue,
+		opts.Body,
+		opts.Path,
+		line,
+		review.ID,
+	)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	apiComment, err := convert.ToPullReviewComment(ctx, review, comment, ctx.Doer)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, apiComment)
+}
+
 // DeletePullReview delete a specific review from a pull request
 func DeletePullReview(ctx *context.APIContext) {
 	// swagger:operation DELETE /repos/{owner}/{repo}/pulls/{index}/reviews/{id} repository repoDeletePullReview

routers/api/v1/swagger/options.go

@@ -161,6 +161,9 @@ type swaggerParameterBodies struct {
 	// in:body
 	CreatePullReviewComment api.CreatePullReviewComment
 
+	// in:body
+	CreatePullReviewCommentOptions api.CreatePullReviewCommentOptions
+
 	// in:body
 	SubmitPullReviewOptions api.SubmitPullReviewOptions
 

services/convert/pull_review.go

@@ -78,6 +78,33 @@ func ToPullReviewList(ctx context.Context, rl []*issues_model.Review, doer *user
 	return result, nil
 }
 
+// ToPullReviewCommentList convert the CodeComments of an review to it's api format
+func ToPullReviewComment(ctx context.Context, review *issues_model.Review, comment *issues_model.Comment, doer *user_model.User) (*api.PullReviewComment, error) {
+	apiComment := &api.PullReviewComment{
+		ID:           comment.ID,
+		Body:         comment.Content,
+		Poster:       ToUser(ctx, comment.Poster, doer),
+		Resolver:     ToUser(ctx, comment.ResolveDoer, doer),
+		ReviewID:     review.ID,
+		Created:      comment.CreatedUnix.AsTime(),
+		Updated:      comment.UpdatedUnix.AsTime(),
+		Path:         comment.TreePath,
+		CommitID:     comment.CommitSHA,
+		OrigCommitID: comment.OldRef,
+		DiffHunk:     patch2diff(comment.Patch),
+		HTMLURL:      comment.HTMLURL(ctx),
+		HTMLPullURL:  review.Issue.HTMLURL(),
+	}
+
+	if comment.Line < 0 {
+		apiComment.OldLineNum = comment.UnsignedLine()
+	} else {
+		apiComment.LineNum = comment.UnsignedLine()
+	}
+
+	return apiComment, nil
+}
+
 // ToPullReviewCommentList convert the CodeComments of an review to it's api format
 func ToPullReviewCommentList(ctx context.Context, review *issues_model.Review, doer *user_model.User) ([]*api.PullReviewComment, error) {
 	if err := review.LoadAttributes(ctx); err != nil {
@@ -92,26 +119,9 @@ func ToPullReviewCommentList(ctx context.Context, review *issues_model.Review, d
 	for _, lines := range review.CodeComments {
 		for _, comments := range lines {
 			for _, comment := range comments {
-				apiComment := &api.PullReviewComment{
+				apiComment, err := ToPullReviewComment(ctx, review, comment, doer)
-					ID:           comment.ID,
+				if err != nil {
-					Body:         comment.Content,
+					return nil, err
-					Poster:       ToUser(ctx, comment.Poster, doer),
-					Resolver:     ToUser(ctx, comment.ResolveDoer, doer),
-					ReviewID:     review.ID,
-					Created:      comment.CreatedUnix.AsTime(),
-					Updated:      comment.UpdatedUnix.AsTime(),
-					Path:         comment.TreePath,
-					CommitID:     comment.CommitSHA,
-					OrigCommitID: comment.OldRef,
-					DiffHunk:     patch2diff(comment.Patch),
-					HTMLURL:      comment.HTMLURL(ctx),
-					HTMLPullURL:  review.Issue.HTMLURL(),
-				}
-
-				if comment.Line < 0 {
-					apiComment.OldLineNum = comment.UnsignedLine()
-				} else {
-					apiComment.LineNum = comment.UnsignedLine()
 				}
 				apiComments = append(apiComments, apiComment)
 			}

services/pull/review.go

@@ -96,7 +96,7 @@ func CreateCodeComment(ctx context.Context, doer *user_model.User, gitRepo *git.
 			return nil, err
 		}
 
-		comment, err := createCodeComment(ctx,
+		comment, err := CreateCodeCommentKnownReviewID(ctx,
 			doer,
 			issue.Repo,
 			issue,
@@ -136,7 +136,7 @@ func CreateCodeComment(ctx context.Context, doer *user_model.User, gitRepo *git.
 		}
 	}
 
-	comment, err := createCodeComment(ctx,
+	comment, err := CreateCodeCommentKnownReviewID(ctx,
 		doer,
 		issue.Repo,
 		issue,
@@ -162,7 +162,7 @@ func CreateCodeComment(ctx context.Context, doer *user_model.User, gitRepo *git.
 }
 
 // createCodeComment creates a plain code comment at the specified line / path
-func createCodeComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, issue *issues_model.Issue, content, treePath string, line, reviewID int64) (*issues_model.Comment, error) {
+func CreateCodeCommentKnownReviewID(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, issue *issues_model.Issue, content, treePath string, line, reviewID int64) (*issues_model.Comment, error) {
 	var commitID, patch string
 	if err := issue.LoadPullRequest(ctx); err != nil {
 		return nil, fmt.Errorf("LoadPullRequest: %w", err)

templates/swagger/v1_json.tmpl

@@ -11542,6 +11542,67 @@
             "$ref": "#/responses/notFound"
           }
         }
+      },
+      "post": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "repository"
+        ],
+        "summary": "Add a new comment to a pull request review",
+        "operationId": "repoCreatePullReviewComment",
+        "parameters": [
+          {
+            "type": "string",
+            "description": "owner of the repo",
+            "name": "owner",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "description": "name of the repo",
+            "name": "repo",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "integer",
+            "format": "int64",
+            "description": "index of the pull request",
+            "name": "index",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "integer",
+            "format": "int64",
+            "description": "id of the review",
+            "name": "id",
+            "in": "path",
+            "required": true
+          },
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CreatePullReviewCommentOptions"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "#/responses/PullReviewComment"
+          },
+          "404": {
+            "$ref": "#/responses/notFound"
+          },
+          "422": {
+            "$ref": "#/responses/validationError"
+          }
+        }
       }
     },
     "/repos/{owner}/{repo}/pulls/{index}/reviews/{id}/dismissals": {
@@ -18528,6 +18589,10 @@
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"
     },
+    "CreatePullReviewCommentOptions": {
+      "description": "CreatePullReviewCommentOptions are options to create a pull review comment",
+      "$ref": "#/definitions/CreatePullReviewComment"
+    },
     "CreatePullReviewOptions": {
       "description": "CreatePullReviewOptions are options to create a pull review",
       "type": "object",

tests/integration/api_pull_review_test.go

@@ -18,8 +18,93 @@ import (
 	"code.gitea.io/gitea/tests"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
+func TestAPIPullReviewCreateComment(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+	pullIssue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 3})
+	assert.NoError(t, pullIssue.LoadAttributes(db.DefaultContext))
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: pullIssue.RepoID})
+
+	username := "user2"
+	session := loginUser(t, username)
+	token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeWriteRepository)
+
+	// as of e522e774cae2240279fc48c349fc513c9d3353ee
+	// There should be no reason for CreateComment to behave differently
+	// depending on the event associated with the review. But the logic of the implementation
+	// at this point in time is very involved and deserves these seemingly redundant
+	// test.
+	for _, event := range []api.ReviewStateType{
+		api.ReviewStatePending,
+		api.ReviewStateRequestChanges,
+		api.ReviewStateApproved,
+		api.ReviewStateComment,
+	} {
+		t.Run("Event_"+string(event), func(t *testing.T) {
+			path := "README.md"
+			var review api.PullReview
+			var reviewLine int64 = 1
+
+			{
+				req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/pulls/%d/reviews", repo.FullName(), pullIssue.Index), &api.CreatePullReviewOptions{
+					Body:  "body1",
+					Event: event,
+				}).AddTokenAuth(token)
+				resp := MakeRequest(t, req, http.StatusOK)
+				DecodeJSON(t, resp, &review)
+				require.EqualValues(t, string(event), review.State)
+				require.EqualValues(t, 0, review.CodeCommentsCount)
+			}
+
+			{
+				req := NewRequestf(t, http.MethodGet, "/api/v1/repos/%s/pulls/%d/reviews/%d", repo.FullName(), pullIssue.Index, review.ID).
+					AddTokenAuth(token)
+				resp := MakeRequest(t, req, http.StatusOK)
+				var getReview api.PullReview
+				DecodeJSON(t, resp, &getReview)
+				require.EqualValues(t, getReview, review)
+			}
+
+			newCommentBody := "first new line"
+
+			{
+				req := NewRequestWithJSON(t, http.MethodPost, fmt.Sprintf("/api/v1/repos/%s/pulls/%d/reviews/%d/comments", repo.FullName(), pullIssue.Index, review.ID), &api.CreatePullReviewCommentOptions{
+					Path:       path,
+					Body:       newCommentBody,
+					OldLineNum: reviewLine,
+				}).AddTokenAuth(token)
+				resp := MakeRequest(t, req, http.StatusOK)
+				var reviewComment *api.PullReviewComment
+				DecodeJSON(t, resp, &reviewComment)
+				assert.EqualValues(t, review.ID, reviewComment.ReviewID)
+			}
+
+			{
+				req := NewRequestf(t, http.MethodGet, "/api/v1/repos/%s/pulls/%d/reviews/%d/comments", repo.FullName(), pullIssue.Index, review.ID).
+					AddTokenAuth(token)
+				resp := MakeRequest(t, req, http.StatusOK)
+
+				var reviewComments []*api.PullReviewComment
+				DecodeJSON(t, resp, &reviewComments)
+				assert.Len(t, reviewComments, 2)
+				assert.EqualValues(t, existingCommentBody, reviewComments[0].Body)
+				assert.EqualValues(t, reviewComments[0].OldLineNum, reviewComments[1].OldLineNum)
+				assert.EqualValues(t, reviewComments[0].LineNum, reviewComments[1].LineNum)
+				assert.EqualValues(t, newCommentBody, reviewComments[1].Body)
+				assert.EqualValues(t, path, reviewComments[1].Path)
+			}
+
+			{
+				req := NewRequestf(t, http.MethodDelete, "/api/v1/repos/%s/pulls/%d/reviews/%d", repo.FullName(), pullIssue.Index, review.ID).
+					AddTokenAuth(token)
+				MakeRequest(t, req, http.StatusNoContent)
+			}
+		})
+	}
+}
+
 func TestAPIPullReview(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
 	pullIssue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 3})