Re-implemented image commenting on diffs

This re-implements image commenting in merge request diffs.
This feature was previously lost when the merge request
page was refactored into Vue.

With this, we create an overlay component. The overlay
component handles displaying the comment badges
and the comment form badge.
Badges are displayed based on the position attribute
sent with the discussion.

Comment forms for diff files are controlled through
a different state property. This is so we don't
tie comment forms to diff files directly creating
deep nested state. Instead we create a flat array
which holds the file hash & the X & Y position of
the comment form.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/48956

1 files changed, 17 insertions, 2 deletions

diff --git a/app/assets/javascripts/diffs/store/actions.js b/app/assets/javascripts/diffs/store/actions.js
index ca8ae605cb4..d3e9c7c88f0 100644
--- a/app/assets/javascripts/diffs/store/actions.js
+++ b/app/assets/javascripts/diffs/store/actions.js
@@ -50,8 +50,8 @@ export const assignDiscussionsToDiff = (
 };
 
 export const removeDiscussionsFromDiff = ({ commit }, removeDiscussion) => {
-  const { fileHash, line_code } = removeDiscussion;
-  commit(types.REMOVE_LINE_DISCUSSIONS_FOR_FILE, { fileHash, lineCode: line_code });
+  const { fileHash, line_code, id } = removeDiscussion;
+  commit(types.REMOVE_LINE_DISCUSSIONS_FOR_FILE, { fileHash, lineCode: line_code, id });
 };
 
 export const startRenderDiffsQueue = ({ state, commit }) => {
@@ -189,6 +189,7 @@ export const saveDiffDiscussion = ({ dispatch }, { note, formData }) => {
   return dispatch('saveNote', postData, { root: true })
     .then(result => dispatch('updateDiscussion', result.discussion, { root: true }))
     .then(discussion => dispatch('assignDiscussionsToDiff', [discussion]))
+    .then(() => dispatch('closeDiffFileCommentForm', formData.diffFile.fileHash))
     .catch(() => createFlash(s__('MergeRequests|Saving the comment failed')));
 };
 
@@ -210,5 +211,19 @@ export const toggleShowTreeList = ({ commit, state }) => {
   localStorage.setItem(MR_TREE_SHOW_KEY, state.showTreeList);
 };
 
+export const openDiffFileCommentForm = ({ commit, getters }, formData) => {
+  const form = getters.getCommentFormForDiffFile(formData.fileHash);
+
+  if (form) {
+    commit(types.UPDATE_DIFF_FILE_COMMENT_FORM, formData);
+  } else {
+    commit(types.OPEN_DIFF_FILE_COMMENT_FORM, formData);
+  }
+};
+
+export const closeDiffFileCommentForm = ({ commit }, fileHash) => {
+  commit(types.CLOSE_DIFF_FILE_COMMENT_FORM, fileHash);
+};
+
 // prevent babel-plugin-rewire from generating an invalid default during karma tests
 export default () => {};