Check for pending migrations when watcher is fired (#504)

Check for pending migrations, notify the user and offer to run them. The idea is that if any modifications are made to the `db/migrate` directory, we check if there are pending migrations.

If there are, we show a dialog and offers to run them. If the user decides to do it, we then fire a request to the server to run the migrations.

Note: we only show the dialog if a migration is deleted or created, otherwise it can become really annoying when you are editing the migration you just created.

lib/ruby_lsp/ruby_lsp_rails/addon.rb

@@ -20,6 +20,8 @@ module Rails
     class Addon < ::RubyLsp::Addon
       extend T::Sig
 
+      RUN_MIGRATIONS_TITLE = "Run Migrations"
+
       sig { void }
       def initialize
         super
@@ -37,6 +39,7 @@ def initialize
           @addon_mutex.synchronize do
             # We need to ensure the Rails client is fully loaded before we activate the server addons
             @client_mutex.synchronize { @rails_runner_client = RunnerClient.create_client(T.must(@outgoing_queue)) }
+            offer_to_run_pending_migrations
           end
         end
       end
@@ -119,11 +122,80 @@ def create_definition_listener(response_builder, uri, node_context, dispatcher)
 
       sig { params(changes: T::Array[{ uri: String, type: Integer }]).void }
       def workspace_did_change_watched_files(changes)
-        if changes.any? do |change|
-             change[:uri].end_with?("db/schema.rb") || change[:uri].end_with?("structure.sql")
-           end
+        if changes.any? { |c| c[:uri].end_with?("db/schema.rb") || c[:uri].end_with?("structure.sql") }
           @rails_runner_client.trigger_reload
         end
+
+        if changes.any? do |c|
+             %r{db/migrate/.*\.rb}.match?(c[:uri]) && c[:type] != Constant::FileChangeType::CHANGED
+           end
+
+          offer_to_run_pending_migrations
+        end
+      end
+
+      sig { override.returns(String) }
+      def name
+        "Ruby LSP Rails"
+      end
+
+      sig { override.params(title: String).void }
+      def handle_window_show_message_response(title)
+        if title == RUN_MIGRATIONS_TITLE
+
+          begin_progress("run-migrations", "Running Migrations")
+          response = @rails_runner_client.run_migrations
+
+          if response && @outgoing_queue
+            if response[:status] == 0
+              # Both log the message and show it as part of progress because sometimes running migrations is so fast you
+              # can't see the progress notification
+              @outgoing_queue << Notification.window_log_message(response[:message])
+              report_progress("run-migrations", message: response[:message])
+            else
+              @outgoing_queue << Notification.window_show_message(
+                "Migrations failed to run\n\n#{response[:message]}",
+                type: Constant::MessageType::ERROR,
+              )
+            end
+          end
+
+          end_progress("run-migrations")
+        end
+      end
+
+      private
+
+      sig { params(id: String, title: String, percentage: T.nilable(Integer), message: T.nilable(String)).void }
+      def begin_progress(id, title, percentage: nil, message: nil)
+        return unless @global_state&.client_capabilities&.supports_progress && @outgoing_queue
+
+        @outgoing_queue << Request.new(
+          id: "progress-request-#{id}",
+          method: "window/workDoneProgress/create",
+          params: Interface::WorkDoneProgressCreateParams.new(token: id),
+        )
+
+        @outgoing_queue << Notification.progress_begin(
+          id,
+          title,
+          percentage: percentage,
+          message: "#{percentage}% completed",
+        )
+      end
+
+      sig { params(id: String, percentage: T.nilable(Integer), message: T.nilable(String)).void }
+      def report_progress(id,  percentage: nil, message: nil)
+        return unless @global_state&.client_capabilities&.supports_progress && @outgoing_queue
+
+        @outgoing_queue << Notification.progress_report(id, percentage: percentage, message: message)
+      end
+
+      sig { params(id: String).void }
+      def end_progress(id)
+        return unless @global_state&.client_capabilities&.supports_progress && @outgoing_queue
+
+        @outgoing_queue << Notification.progress_end(id)
       end
 
       sig { params(global_state: GlobalState, outgoing_queue: Thread::Queue).void }
@@ -152,9 +224,26 @@ def register_additional_file_watchers(global_state:, outgoing_queue:)
         )
       end
 
-      sig { override.returns(String) }
-      def name
-        "Ruby LSP Rails"
+      sig { void }
+      def offer_to_run_pending_migrations
+        return unless @outgoing_queue
+        return unless @global_state&.client_capabilities&.window_show_message_supports_extra_properties
+
+        migration_message = @rails_runner_client.pending_migrations_message
+        return unless migration_message
+
+        @outgoing_queue << Request.new(
+          id: "rails-pending-migrations",
+          method: "window/showMessageRequest",
+          params: {
+            type: Constant::MessageType::INFO,
+            message: migration_message,
+            actions: [
+              { title: RUN_MIGRATIONS_TITLE, addon_name: name, method: "window/showMessageRequest" },
+              { title: "Cancel", addon_name: name, method: "window/showMessageRequest" },
+            ],
+          },
+        )
       end
     end
   end

test/ruby_lsp_rails/addon_test.rb

@@ -49,6 +49,49 @@ class AddonTest < ActiveSupport::TestCase
         addon = Addon.new
         addon.workspace_did_change_watched_files(changes)
       end
+
+      test "handling window show message response to run migrations" do
+        RunnerClient.any_instance.expects(:run_migrations).once.returns({ message: "Ran migrations!", status: 0 })
+        outgoing_queue = Thread::Queue.new
+        global_state = GlobalState.new
+        global_state.apply_options({ capabilities: { window: { workDoneProgress: true } } })
+
+        addon = Addon.new
+        addon.activate(global_state, outgoing_queue)
+
+        # Wait until activation is done
+        Thread.new do
+          addon.rails_runner_client
+        end.join
+
+        addon.handle_window_show_message_response("Run Migrations")
+
+        progress_request = pop_message(outgoing_queue) { |message| message.is_a?(Request) }
+        assert_instance_of(Request, progress_request)
+
+        progress_begin = pop_message(outgoing_queue) do |message|
+          message.is_a?(Notification) && message.method == "$/progress"
+        end
+        assert_equal("begin", progress_begin.params.value.kind)
+
+        report_log = pop_message(outgoing_queue) do |message|
+          message.is_a?(Notification) && message.method == "window/logMessage"
+        end
+        assert_equal("Ran migrations!", report_log.params.message)
+
+        progress_report = pop_message(outgoing_queue) do |message|
+          message.is_a?(Notification) && message.method == "$/progress"
+        end
+        assert_equal("report", progress_report.params.value.kind)
+        assert_equal("Ran migrations!", progress_report.params.value.message)
+
+        progress_end = pop_message(outgoing_queue) do |message|
+          message.is_a?(Notification) && message.method == "$/progress"
+        end
+        assert_equal("end", progress_end.params.value.kind)
+      ensure
+        T.must(outgoing_queue).close
+      end
     end
   end
 end

test/test_helper.rb

@@ -56,5 +56,13 @@ def pop_log_notification(message_queue, type)
       log = message_queue.pop until log.params.type == type
       log
     end
+
+    def pop_message(outgoing_queue, &block)
+      message = outgoing_queue.pop
+      return message if block.call(message)
+
+      message = outgoing_queue.pop until block.call(message)
+      message
+    end
   end
 end