Merge branch 'mr-legacy-diff-notes' into 'master'

Re-enable legacy diff notes on merge request diffs

Closes #48873

See merge request gitlab-org/gitlab-ce!21652

11 files changed, 239 insertions, 25 deletions

diff --git a/app/assets/javascripts/diffs/components/diff_line_note_form.vue b/app/assets/javascripts/diffs/components/diff_line_note_form.vue
index a0dc381ccc7..0fa14615532 100644
--- a/app/assets/javascripts/diffs/components/diff_line_note_form.vue
+++ b/app/assets/javascripts/diffs/components/diff_line_note_form.vue
@@ -22,7 +22,7 @@ export default {
       type: Object,
       required: true,
     },
-    position: {
+    linePosition: {
       type: String,
       required: false,
       default: '',
@@ -81,7 +81,7 @@ export default {
         noteTargetLine: this.noteTargetLine,
         diffViewType: this.diffViewType,
         diffFile: selectedDiffFile,
-        linePosition: this.position,
+        linePosition: this.linePosition,
       });
 
       this.saveNote(postData)
diff --git a/app/assets/javascripts/diffs/components/parallel_diff_comment_row.vue b/app/assets/javascripts/diffs/components/parallel_diff_comment_row.vue
index 26417c350cb..3339c56cbb6 100644
--- a/app/assets/javascripts/diffs/components/parallel_diff_comment_row.vue
+++ b/app/assets/javascripts/diffs/components/parallel_diff_comment_row.vue
@@ -92,7 +92,7 @@ export default {
         :diff-file-hash="diffFileHash"
         :line="line.left"
         :note-target-line="line.left"
-        position="left"
+        line-position="left"
       />
     </td>
     <td class="notes_line new"></td>
@@ -111,7 +111,7 @@ export default {
         :diff-file-hash="diffFileHash"
         :line="line.right"
         :note-target-line="line.right"
-        position="right"
+        line-position="right"
       />
     </td>
   </tr>
diff --git a/app/assets/javascripts/diffs/constants.js b/app/assets/javascripts/diffs/constants.js
index f68afa44837..2795dddfc48 100644
--- a/app/assets/javascripts/diffs/constants.js
+++ b/app/assets/javascripts/diffs/constants.js
@@ -7,6 +7,7 @@ export const CONTEXT_LINE_TYPE = 'context';
 export const EMPTY_CELL_TYPE = 'empty-cell';
 export const COMMENT_FORM_TYPE = 'commentForm';
 export const DIFF_NOTE_TYPE = 'DiffNote';
+export const LEGACY_DIFF_NOTE_TYPE = 'LegacyDiffNote';
 export const NOTE_TYPE = 'Note';
 export const NEW_LINE_TYPE = 'new';
 export const OLD_LINE_TYPE = 'old';
diff --git a/app/assets/javascripts/diffs/store/mutations.js b/app/assets/javascripts/diffs/store/mutations.js
index 6dc5bf16c65..59a2c09e54f 100644
--- a/app/assets/javascripts/diffs/store/mutations.js
+++ b/app/assets/javascripts/diffs/store/mutations.js
@@ -90,16 +90,18 @@ export default {
     const firstDiscussion = discussions[0];
     const isDiffDiscussion = firstDiscussion.diff_discussion;
     const hasLineCode = firstDiscussion.line_code;
-    const isResolvable = firstDiscussion.resolvable;
     const diffPosition = diffPositionByLineCode[firstDiscussion.line_code];
 
     if (
       selectedFile &&
       isDiffDiscussion &&
       hasLineCode &&
-      isResolvable &&
       diffPosition &&
-      isDiscussionApplicableToLine(firstDiscussion, diffPosition)
+      isDiscussionApplicableToLine({
+        discussion: firstDiscussion,
+        diffPosition,
+        latestDiff: state.latestDiff,
+      })
     ) {
       const targetLine = selectedFile.parallelDiffLines.find(
         line =>
diff --git a/app/assets/javascripts/diffs/store/utils.js b/app/assets/javascripts/diffs/store/utils.js
index b7e52a8f37f..834a94ea42a 100644
--- a/app/assets/javascripts/diffs/store/utils.js
+++ b/app/assets/javascripts/diffs/store/utils.js
@@ -4,6 +4,7 @@ import {
   LINE_POSITION_LEFT,
   LINE_POSITION_RIGHT,
   TEXT_DIFF_POSITION_TYPE,
+  LEGACY_DIFF_NOTE_TYPE,
   DIFF_NOTE_TYPE,
   NEW_LINE_TYPE,
   OLD_LINE_TYPE,
@@ -60,7 +61,10 @@ export function getNoteFormData(params) {
       noteable_type: noteableType,
       noteable_id: noteableData.id,
       commit_id: '',
-      type: DIFF_NOTE_TYPE,
+      type:
+        diffFile.diffRefs.startSha && diffFile.diffRefs.headSha
+          ? DIFF_NOTE_TYPE
+          : LEGACY_DIFF_NOTE_TYPE,
       line_code: noteTargetLine.lineCode,
     },
   };
@@ -230,7 +234,16 @@ export function getDiffPositionByLineCode(diffFiles) {
         const { lineCode, oldLine, newLine } = line;
 
         if (lineCode) {
-          acc[lineCode] = { baseSha, headSha, startSha, newPath, oldPath, oldLine, newLine };
+          acc[lineCode] = {
+            baseSha,
+            headSha,
+            startSha,
+            newPath,
+            oldPath,
+            oldLine,
+            newLine,
+            lineCode,
+          };
         }
       });
     }
@@ -241,9 +254,15 @@ export function getDiffPositionByLineCode(diffFiles) {
 
 // This method will check whether the discussion is still applicable
 // to the diff line in question regarding different versions of the MR
-export function isDiscussionApplicableToLine(discussion, diffPosition) {
-  const originalRefs = convertObjectPropsToCamelCase(discussion.original_position.formatter);
-  const refs = convertObjectPropsToCamelCase(discussion.position.formatter);
+export function isDiscussionApplicableToLine({ discussion, diffPosition, latestDiff }) {
+  const { lineCode, ...diffPositionCopy } = diffPosition;
 
-  return _.isEqual(refs, diffPosition) || _.isEqual(originalRefs, diffPosition);
+  if (discussion.original_position && discussion.position) {
+    const originalRefs = convertObjectPropsToCamelCase(discussion.original_position.formatter);
+    const refs = convertObjectPropsToCamelCase(discussion.position.formatter);
+
+    return _.isEqual(refs, diffPositionCopy) || _.isEqual(originalRefs, diffPositionCopy);
+  }
+
+  return latestDiff && discussion.active && lineCode === discussion.line_code;
 }
diff --git a/app/assets/javascripts/notes/stores/utils.js b/app/assets/javascripts/notes/stores/utils.js
index 8ccbdb4c130..0e41ff03d67 100644
--- a/app/assets/javascripts/notes/stores/utils.js
+++ b/app/assets/javascripts/notes/stores/utils.js
@@ -27,7 +27,7 @@ export const getQuickActionText = note => {
 
 export const reduceDiscussionsToLineCodes = selectedDiscussions =>
   selectedDiscussions.reduce((acc, note) => {
-    if (note.diff_discussion && note.line_code && note.resolvable) {
+    if (note.diff_discussion && note.line_code) {
       // For context about line notes: there might be multiple notes with the same line code
       const items = acc[note.line_code] || [];
       items.push(note);
diff --git a/changelogs/unreleased/mr-legacy-diff-notes.yml b/changelogs/unreleased/mr-legacy-diff-notes.yml
new file mode 100644
index 00000000000..bca5ac8297f
--- /dev/null
+++ b/changelogs/unreleased/mr-legacy-diff-notes.yml
@@ -0,0 +1,5 @@
+---
+title: Correctly show legacy diff notes in the merge request changes tab
+merge_request: 21652
+author:
+type: fixed
diff --git a/spec/features/merge_request/user_posts_diff_notes_spec.rb b/spec/features/merge_request/user_posts_diff_notes_spec.rb
index b6ed3686de2..fa148715855 100644
--- a/spec/features/merge_request/user_posts_diff_notes_spec.rb
+++ b/spec/features/merge_request/user_posts_diff_notes_spec.rb
@@ -200,23 +200,20 @@ describe 'Merge request > User posts diff notes', :js do
     end
 
     context 'with a new line' do
-      # TODO: https://gitlab.com/gitlab-org/gitlab-ce/issues/48034
-      xit 'allows commenting' do
-        should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_10_9"]').find(:xpath, '..'))
+      it 'allows commenting' do
+        should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_10_9"]'))
       end
     end
 
     context 'with an old line' do
-      # TODO: https://gitlab.com/gitlab-org/gitlab-ce/issues/48034
-      xit 'allows commenting' do
-        should_allow_commenting(find('[id="6eb14e00385d2fb284765eb1cd8d420d33d63fc9_22_22"]').find(:xpath, '..'))
+      it 'allows commenting' do
+        should_allow_commenting(find('[id="6eb14e00385d2fb284765eb1cd8d420d33d63fc9_22_22"]'))
       end
     end
 
     context 'with an unchanged line' do
-      # TODO: https://gitlab.com/gitlab-org/gitlab-ce/issues/48034
-      xit 'allows commenting' do
-        should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]').find(:xpath, '..'))
+      it 'allows commenting' do
+        should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]'))
       end
     end
 
diff --git a/spec/javascripts/diffs/store/actions_spec.js b/spec/javascripts/diffs/store/actions_spec.js
index cfb8f862598..fd5c5e104b4 100644
--- a/spec/javascripts/diffs/store/actions_spec.js
+++ b/spec/javascripts/diffs/store/actions_spec.js
@@ -157,6 +157,7 @@ describe('DiffsStoreActions', () => {
                   newPath: 'file1',
                   oldLine: 5,
                   oldPath: 'file2',
+                  lineCode: 'ABC_1_1',
                 },
               },
             },
diff --git a/spec/javascripts/diffs/store/mutations_spec.js b/spec/javascripts/diffs/store/mutations_spec.js
index 7eeca6712cc..9a5d8dfbd15 100644
--- a/spec/javascripts/diffs/store/mutations_spec.js
+++ b/spec/javascripts/diffs/store/mutations_spec.js
@@ -162,6 +162,7 @@ describe('DiffsStoreMutations', () => {
       };
 
       const state = {
+        latestDiff: true,
         diffFiles: [
           {
             fileHash: 'ABC',
@@ -229,6 +230,76 @@ describe('DiffsStoreMutations', () => {
       expect(state.diffFiles[0].highlightedDiffLines[0].discussions.length).toEqual(2);
       expect(state.diffFiles[0].highlightedDiffLines[0].discussions[1].id).toEqual(2);
     });
+
+    it('should add legacy discussions to the given line', () => {
+      const diffPosition = {
+        baseSha: 'ed13df29948c41ba367caa757ab3ec4892509910',
+        headSha: 'b921914f9a834ac47e6fd9420f78db0f83559130',
+        newLine: null,
+        newPath: '500-lines-4.txt',
+        oldLine: 5,
+        oldPath: '500-lines-4.txt',
+        startSha: 'ed13df29948c41ba367caa757ab3ec4892509910',
+        lineCode: 'ABC_1',
+      };
+
+      const state = {
+        latestDiff: true,
+        diffFiles: [
+          {
+            fileHash: 'ABC',
+            parallelDiffLines: [
+              {
+                left: {
+                  lineCode: 'ABC_1',
+                  discussions: [],
+                },
+                right: {
+                  lineCode: 'ABC_1',
+                  discussions: [],
+                },
+              },
+            ],
+            highlightedDiffLines: [
+              {
+                lineCode: 'ABC_1',
+                discussions: [],
+              },
+            ],
+          },
+        ],
+      };
+      const discussions = [
+        {
+          id: 1,
+          line_code: 'ABC_1',
+          diff_discussion: true,
+          active: true,
+        },
+        {
+          id: 2,
+          line_code: 'ABC_1',
+          diff_discussion: true,
+          active: true,
+        },
+      ];
+
+      const diffPositionByLineCode = {
+        ABC_1: diffPosition,
+      };
+
+      mutations[types.SET_LINE_DISCUSSIONS_FOR_FILE](state, {
+        fileHash: 'ABC',
+        discussions,
+        diffPositionByLineCode,
+      });
+
+      expect(state.diffFiles[0].parallelDiffLines[0].left.discussions.length).toEqual(2);
+      expect(state.diffFiles[0].parallelDiffLines[0].left.discussions[1].id).toEqual(2);
+
+      expect(state.diffFiles[0].highlightedDiffLines[0].discussions.length).toEqual(2);
+      expect(state.diffFiles[0].highlightedDiffLines[0].discussions[1].id).toEqual(2);
+    });
   });
 
   describe('REMOVE_LINE_DISCUSSIONS', () => {
diff --git a/spec/javascripts/diffs/store/utils_spec.js b/spec/javascripts/diffs/store/utils_spec.js
index 4b5cf450c68..6138b9701f4 100644
--- a/spec/javascripts/diffs/store/utils_spec.js
+++ b/spec/javascripts/diffs/store/utils_spec.js
@@ -3,6 +3,7 @@ import {
   LINE_POSITION_LEFT,
   LINE_POSITION_RIGHT,
   TEXT_DIFF_POSITION_TYPE,
+  LEGACY_DIFF_NOTE_TYPE,
   DIFF_NOTE_TYPE,
   NEW_LINE_TYPE,
   OLD_LINE_TYPE,
@@ -151,6 +152,64 @@ describe('DiffsStoreUtils', () => {
         data: postData,
       });
     });
+
+    it('should create legacy note form data', () => {
+      const diffFile = getDiffFileMock();
+      delete diffFile.diffRefs.startSha;
+      delete diffFile.diffRefs.headSha;
+
+      noteableDataMock.targetType = MERGE_REQUEST_NOTEABLE_TYPE;
+
+      const options = {
+        note: 'Hello world!',
+        noteableData: noteableDataMock,
+        noteableType: MERGE_REQUEST_NOTEABLE_TYPE,
+        diffFile,
+        noteTargetLine: {
+          lineCode: '1c497fbb3a46b78edf04cc2a2fa33f67e3ffbe2a_1_3',
+          metaData: null,
+          newLine: 3,
+          oldLine: 1,
+        },
+        diffViewType: PARALLEL_DIFF_VIEW_TYPE,
+        linePosition: LINE_POSITION_LEFT,
+      };
+
+      const position = JSON.stringify({
+        base_sha: diffFile.diffRefs.baseSha,
+        start_sha: undefined,
+        head_sha: undefined,
+        old_path: diffFile.oldPath,
+        new_path: diffFile.newPath,
+        position_type: TEXT_DIFF_POSITION_TYPE,
+        old_line: options.noteTargetLine.oldLine,
+        new_line: options.noteTargetLine.newLine,
+      });
+
+      const postData = {
+        view: options.diffViewType,
+        line_type: options.linePosition === LINE_POSITION_RIGHT ? NEW_LINE_TYPE : OLD_LINE_TYPE,
+        merge_request_diff_head_sha: undefined,
+        in_reply_to_discussion_id: '',
+        note_project_id: '',
+        target_type: options.noteableType,
+        target_id: options.noteableData.id,
+        note: {
+          noteable_type: options.noteableType,
+          noteable_id: options.noteableData.id,
+          commit_id: '',
+          type: LEGACY_DIFF_NOTE_TYPE,
+          line_code: options.noteTargetLine.lineCode,
+          note: options.note,
+          position,
+        },
+      };
+
+      expect(utils.getNoteFormData(options)).toEqual({
+        endpoint: options.noteableData.create_note_path,
+        data: postData,
+      });
+    });
   });
 
   describe('addLineReferences', () => {
@@ -291,13 +350,72 @@ describe('DiffsStoreUtils', () => {
 
     it('returns true when the discussion is up to date', () => {
       expect(
-        utils.isDiscussionApplicableToLine(discussions.upToDateDiscussion1, diffPosition),
+        utils.isDiscussionApplicableToLine({
+          discussion: discussions.upToDateDiscussion1,
+          diffPosition,
+          latestDiff: true,
+        }),
       ).toBe(true);
     });
 
     it('returns false when the discussion is not up to date', () => {
       expect(
-        utils.isDiscussionApplicableToLine(discussions.outDatedDiscussion1, diffPosition),
+        utils.isDiscussionApplicableToLine({
+          discussion: discussions.outDatedDiscussion1,
+          diffPosition,
+          latestDiff: true,
+        }),
+      ).toBe(false);
+    });
+
+    it('returns true when line codes match and discussion does not contain position and is not active', () => {
+      const discussion = { ...discussions.outDatedDiscussion1, line_code: 'ABC_1', active: false };
+      delete discussion.original_position;
+      delete discussion.position;
+
+      expect(
+        utils.isDiscussionApplicableToLine({
+          discussion,
+          diffPosition: {
+            ...diffPosition,
+            lineCode: 'ABC_1',
+          },
+          latestDiff: true,
+        }),
+      ).toBe(false);
+    });
+
+    it('returns true when line codes match and discussion does not contain position and is active', () => {
+      const discussion = { ...discussions.outDatedDiscussion1, line_code: 'ABC_1', active: true };
+      delete discussion.original_position;
+      delete discussion.position;
+
+      expect(
+        utils.isDiscussionApplicableToLine({
+          discussion,
+          diffPosition: {
+            ...diffPosition,
+            lineCode: 'ABC_1',
+          },
+          latestDiff: true,
+        }),
+      ).toBe(true);
+    });
+
+    it('returns false when not latest diff', () => {
+      const discussion = { ...discussions.outDatedDiscussion1, line_code: 'ABC_1', active: true };
+      delete discussion.original_position;
+      delete discussion.position;
+
+      expect(
+        utils.isDiscussionApplicableToLine({
+          discussion,
+          diffPosition: {
+            ...diffPosition,
+            lineCode: 'ABC_1',
+          },
+          latestDiff: false,
+        }),
       ).toBe(false);
     });
   });