From 3e076b41117157b9aa72478bccfeae3aa211f01f Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Tue, 9 Jan 2018 21:11:30 -0800
Subject: [PATCH] workspace/didChangeWatchedFiles placeholder

---
 src/command_line.cc                           |  1 +
 src/ipc.cc                                    |  2 +
 src/ipc.h                                     |  1 +
 .../workspace_did_change_watched_files.cc     | 51 +++++++++++++++++++
 4 files changed, 55 insertions(+)
 create mode 100644 src/messages/workspace_did_change_watched_files.cc

diff --git a/src/command_line.cc b/src/command_line.cc
index 123f62a5..ab6c45c1 100644
--- a/src/command_line.cc
+++ b/src/command_line.cc
@@ -286,6 +286,7 @@ void LaunchStdinLoop(Config* config,
         case IpcId::TextDocumentDocumentLink:
         case IpcId::TextDocumentCodeAction:
         case IpcId::TextDocumentCodeLens:
+        case IpcId::WorkspaceDidChangeWatchedFiles:
         case IpcId::WorkspaceSymbol:
         case IpcId::CqueryFreshenIndex:
         case IpcId::CqueryTypeHierarchyTree:
diff --git a/src/ipc.cc b/src/ipc.cc
index 767528fe..53919f7c 100644
--- a/src/ipc.cc
+++ b/src/ipc.cc
@@ -54,6 +54,8 @@ const char* IpcIdToString(IpcId id) {
       return "textDocument/codeLens";
     case IpcId::CodeLensResolve:
       return "codeLens/resolve";
+    case IpcId::WorkspaceDidChangeWatchedFiles:
+      return "workspace/didChangeWatchedFiles";
     case IpcId::WorkspaceSymbol:
       return "workspace/symbol";
 
diff --git a/src/ipc.h b/src/ipc.h
index c626c7a8..714c6431 100644
--- a/src/ipc.h
+++ b/src/ipc.h
@@ -32,6 +32,7 @@ enum class IpcId : int {
   TextDocumentCodeAction,
   TextDocumentCodeLens,
   CodeLensResolve,
+  WorkspaceDidChangeWatchedFiles,
   WorkspaceSymbol,
 
   // Custom notifications
diff --git a/src/messages/workspace_did_change_watched_files.cc b/src/messages/workspace_did_change_watched_files.cc
new file mode 100644
index 00000000..04e05ce0
--- /dev/null
+++ b/src/messages/workspace_did_change_watched_files.cc
@@ -0,0 +1,51 @@
+#include "message_handler.h"
+#include "queue_manager.h"
+
+namespace {
+enum class lsFileChangeType {
+  Created = 1,
+  Changed = 2,
+  Deleted = 3,
+};
+MAKE_REFLECT_TYPE_PROXY(lsFileChangeType,
+                        std::underlying_type<lsFileChangeType>::type);
+
+struct lsFileEvent {
+  lsDocumentUri uri;
+  lsFileChangeType type;
+};
+MAKE_REFLECT_STRUCT(lsFileEvent, uri, type);
+
+struct lsDidChangeWatchedFilesParams {
+  std::vector<lsFileEvent> changes;
+};
+MAKE_REFLECT_STRUCT(lsDidChangeWatchedFilesParams, changes);
+
+struct Ipc_WorkspaceDidChangeWatchedFiles
+    : public IpcMessage<Ipc_WorkspaceDidChangeWatchedFiles> {
+  const static IpcId kIpcId = IpcId::WorkspaceDidChangeWatchedFiles;
+  lsDidChangeWatchedFilesParams params;
+};
+MAKE_REFLECT_STRUCT(Ipc_WorkspaceDidChangeWatchedFiles, params);
+REGISTER_IPC_MESSAGE(Ipc_WorkspaceDidChangeWatchedFiles);
+
+struct WorkspaceDidChangeWatchedFilesHandler
+    : BaseMessageHandler<Ipc_WorkspaceDidChangeWatchedFiles> {
+  void Run(Ipc_WorkspaceDidChangeWatchedFiles* request) override {
+    for (lsFileEvent& event : request->params.changes) {
+      switch (event.type) {
+        case lsFileChangeType::Created:
+          // TODO
+          break;
+        case lsFileChangeType::Deleted:
+          // TODO
+          break;
+        case lsFileChangeType::Changed:
+          // TODO
+          break;
+      }
+    }
+  }
+};
+REGISTER_MESSAGE_HANDLER(WorkspaceDidChangeWatchedFilesHandler);
+}  // namespace