Send notification emails when push to a merge request

Closes #23460

2 files changed, 39 insertions, 0 deletions

diff --git a/app/views/notify/push_to_merge_request_email.html.haml b/app/views/notify/push_to_merge_request_email.html.haml
new file mode 100644
index 00000000000..5cc6f21c0f3
--- /dev/null
+++ b/app/views/notify/push_to_merge_request_email.html.haml
@@ -0,0 +1,26 @@
+%h3
+  New commits were pushed to the merge request
+  = link_to(@merge_request.to_reference, project_merge_request_url(@merge_request.target_project, @merge_request))
+  by #{@current_user.name}
+
+- if @existing_commits.any?
+  - count = @existing_commits.size
+  %ul
+    %li
+      - if count.one?
+        - commit_id = @existing_commits.first[:short_id]
+        = link_to(commit_id, project_commit_url(@merge_request.target_project, commit_id))
+      - else
+        = link_to(project_compare_url(@merge_request.target_project, from: @existing_commits.first[:short_id], to: @existing_commits.last[:short_id])) do
+          #{@existing_commits.first[:short_id]}...#{@existing_commits.last[:short_id]}
+      = precede ' - ' do
+        - commits_text = "#{count} commit".pluralize(count)
+        #{commits_text} from branch `#{@merge_request.target_branch}`
+
+- if @new_commits.any?
+  %ul
+    - @new_commits.each do |commit|
+      %li
+        = link_to(commit[:short_id], project_commit_url(@merge_request.target_project, commit[:short_id]))
+        = precede ' - ' do
+          #{commit[:title]}
diff --git a/app/views/notify/push_to_merge_request_email.text.haml b/app/views/notify/push_to_merge_request_email.text.haml
new file mode 100644
index 00000000000..d7722e5f41f
--- /dev/null
+++ b/app/views/notify/push_to_merge_request_email.text.haml
@@ -0,0 +1,13 @@
+New commits were pushed to the merge request #{@merge_request.to_reference} by #{@current_user.name}
+\
+#{url_for(project_merge_request_url(@merge_request.target_project, @merge_request))}
+\
+- if @existing_commits.any?
+  - count = @existing_commits.size
+  - commits_id = count.one? ? @existing_commits.first[:short_id] : "#{@existing_commits.first[:short_id]}...#{@existing_commits.last[:short_id]}"
+  - commits_text = "#{count} commit".pluralize(count)
+
+  * #{commits_id} - #{commits_text} from branch `#{@merge_request.target_branch}`
+\
+- @new_commits.each do |commit|
+  * #{commit[:short_id]} - #{raw commit[:title]}