Rename "Slash commands" to "Quick actions"

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27070

Deprecate "chat commands" in favor of "slash commands"

We looked for things like:

 - `slash commmand`
 - `slash_command`
 - `slash-command`
 - `SlashCommand`

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/gitlab/slash_commands/command.rb b/lib/gitlab/slash_commands/command.rb
new file mode 100644
index 00000000000..a78408b0519
--- /dev/null
+++ b/lib/gitlab/slash_commands/command.rb
@@ -0,0 +1,44 @@
+module Gitlab
+  module SlashCommands
+    class Command < BaseCommand
+      COMMANDS = [
+        Gitlab::SlashCommands::IssueShow,
+        Gitlab::SlashCommands::IssueNew,
+        Gitlab::SlashCommands::IssueSearch,
+        Gitlab::SlashCommands::Deploy
+      ].freeze
+
+      def execute
+        command, match = match_command
+
+        if command
+          if command.allowed?(project, current_user)
+            command.new(project, current_user, params).execute(match)
+          else
+            Gitlab::SlashCommands::Presenters::Access.new.access_denied
+          end
+        else
+          Gitlab::SlashCommands::Help.new(project, current_user, params).execute(available_commands, params[:text])
+        end
+      end
+
+      def match_command
+        match = nil
+        service =
+          available_commands.find do |klass|
+            match = klass.match(params[:text])
+          end
+
+        [service, match]
+      end
+
+      private
+
+      def available_commands
+        COMMANDS.select do |klass|
+          klass.available?(project)
+        end
+      end
+    end
+  end
+end