Add email notification

- Add mailer to notify user of imported
requirements
- Add email templates
- Add tests

ee/app/mailers/ee/notify.rb

@@ -11,6 +11,7 @@ module EE
     prepended do
       include ::Emails::AdminNotification
       include ::Emails::Epics
+      include ::Emails::Requirements
     end
 
     attr_reader :group

ee/app/mailers/ee/preview/notify_preview.rb

@@ -39,6 +39,10 @@ module EE
         def send_unsubscribed_notification
           ::Notify.send_unsubscribed_notification(user.id).message
         end
+
+        def import_requirements_csv_email
+          Notify.import_requirements_csv_email(user.id, project.id, { success: 3, errors: [5, 6, 7], valid_file: true })
+        end
       end
 
       private

ee/app/mailers/emails/requirements.rb

+# frozen_string_literal: true
+
+module Emails
+  module Requirements
+    def import_requirements_csv_email(user_id, project_id, results)
+      @user = User.find(user_id)
+      @project = Project.find(project_id)
+      @results = results
+
+      mail(to: @user.notification_email_for(@project.group), subject: subject('Imported requirements')) do |format|
+        format.html { render layout: 'mailer' }
+        format.text { render layout: 'mailer' }
+      end
+    end
+  end
+end

ee/app/views/notify/import_requirements_csv_email.html.haml

+- text_style = 'font-size:16px; text-align:center;  line-height:30px;'
+
+%p{ style: text_style }
+  = _('Your CSV import for project')
+  %a{ href: project_url(@project), style: "color:#3777b0; text-decoration:none;" }
+    = @project.full_name
+  = _('has been completed.')
+
+%p{ style: text_style }
+  #{pluralize(@results[:success], 'requirement')} imported.
+
+- if @results[:error_lines].present?
+  %p{ style: text_style }
+    Errors found on line #{'number'.pluralize(@results[:error_lines].size)}: #{@results[:error_lines].join(', ')}. Please check if these lines have a requirement title.
+
+- if @results[:parse_error]
+  %p{ style: text_style }
+    = _('Error parsing CSV file. Please make sure it has the correct format: a delimited text file that uses a comma to separate values.')

ee/app/views/notify/import_requirements_csv_email.text.erb

+Your CSV import for project <%= @project.full_name %> (<%= project_url(@project) %>) has been completed.
+
+<%= pluralize(@results[:success], 'requirement') %> imported.
+
+<% if @results[:error_lines].present? %>
+Errors found on line <%= 'number'.pluralize(@results[:error_lines].size) %>: <%= @results[:error_lines].join(', ') %>. Please check if these lines have a requirement title.
+<% end %>
+
+<% if @results[:parse_error] %>
+Error parsing CSV file. Please make sure it has the correct format: a delimited text file that uses a comma to separate values.
+<% end %>

ee/changelogs/unreleased/246857-requirements-management-import-csv.yml

+---
+title: Add service to import Requirements from a CSV file
+merge_request: 46361
+author:
+type: added

ee/spec/mailers/emails/requirements_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Emails::Requirements do
+  include EmailSpec::Matchers
+
+  describe "#import_requirements_csv_email" do
+    let(:user) { create(:user) }
+    let(:project) { create(:project) }
+
+    subject { Notify.import_requirements_csv_email(user.id, project.id, @results) }
+
+    it "shows number of successful requirements imported" do
+      @results = { success: 165, error_lines: [], parse_error: false }
+
+      expect(subject).to have_body_text "165 requirements imported"
+    end
+
+    it "shows error when file is invalid" do
+      @results = { success: 0, error_lines: [], parse_error: true }
+
+      expect(subject).to have_body_text "Error parsing CSV"
+    end
+
+    it "shows line numbers with errors" do
+      @results = { success: 0, error_lines: [23, 34, 58], parse_error: false }
+
+      expect(subject).to have_body_text "23, 34, 58"
+    end
+
+    context 'with header and footer' do
+      let(:results) { { success: 165, error_lines: [], parse_error: false } }
+
+      subject { Notify.import_requirements_csv_email(user.id, project.id, results) }
+
+      it_behaves_like 'appearance header and footer enabled'
+      it_behaves_like 'appearance header and footer not enabled'
+    end
+  end
+end

locale/gitlab.pot

@@ -10649,6 +10649,9 @@ msgstr ""
 msgid "Error occurred. User was not unlocked"
 msgstr ""
 
+msgid "Error parsing CSV file. Please make sure it has the correct format: a delimited text file that uses a comma to separate values."
+msgstr ""
+
 msgid "Error rendering markdown preview"
 msgstr ""
 
@@ -30848,6 +30851,9 @@ msgstr ""
 msgid "Your CSV export of %{written_count} from project %{project_name} (%{project_url}) has been added to this email as an attachment."
 msgstr ""
 
+msgid "Your CSV import for project"
+msgstr ""
+
 msgid "Your Commit Email will be used for web based operations, such as edits and merges."
 msgstr ""
 
@@ -31604,6 +31610,9 @@ msgstr ""
 msgid "has already been taken"
 msgstr ""
 
+msgid "has been completed."
+msgstr ""
+
 msgid "help"
 msgstr ""