LibIPC: Add IPC::take_over_accepted_client_from_system_server<Client>()

This is an encapsulation of the common work done by all of our
single-client IPC servers on startup:

    1. Create a Core::LocalSocket, taking over an accepted fd.
    2. Create an application-specific ClientConnection object,
       wrapping the socket.

It's not a huge change in terms of lines saved, but I do feel that it
improves expressiveness. :^)

6 files changed, 13 insertions, 16 deletions

diff --git a/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.cpp b/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.cpp
index 567268a994..f7e21a2d36 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.cpp
@@ -14,10 +14,10 @@ namespace LanguageServers {
 
 static HashMap<int, RefPtr<ClientConnection>> s_connections;
 
-ClientConnection::ClientConnection(NonnullRefPtr<Core::LocalSocket> socket, int client_id)
-    : IPC::ClientConnection<LanguageClientEndpoint, LanguageServerEndpoint>(*this, move(socket), client_id)
+ClientConnection::ClientConnection(NonnullRefPtr<Core::LocalSocket> socket)
+    : IPC::ClientConnection<LanguageClientEndpoint, LanguageServerEndpoint>(*this, move(socket), 1)
 {
-    s_connections.set(client_id, *this);
+    s_connections.set(1, *this);
 }
 
 ClientConnection::~ClientConnection()
diff --git a/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.h b/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.h
index 1901743463..951da34cac 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.h
+++ b/Userland/DevTools/HackStudio/LanguageServers/ClientConnection.h
@@ -20,7 +20,7 @@ namespace LanguageServers {
 
 class ClientConnection : public IPC::ClientConnection<LanguageClientEndpoint, LanguageServerEndpoint> {
 public:
-    explicit ClientConnection(NonnullRefPtr<Core::LocalSocket>, int client_id);
+    explicit ClientConnection(NonnullRefPtr<Core::LocalSocket>);
     ~ClientConnection() override;
 
     virtual void die() override;
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.h b/Userland/DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.h
index f67e888015..c2fae04cca 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.h
+++ b/Userland/DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.h
@@ -15,8 +15,8 @@ class ClientConnection final : public LanguageServers::ClientConnection {
     C_OBJECT(ClientConnection);
 
 private:
-    ClientConnection(NonnullRefPtr<Core::LocalSocket> socket, int client_id)
-        : LanguageServers::ClientConnection(move(socket), client_id)
+    ClientConnection(NonnullRefPtr<Core::LocalSocket> socket)
+        : LanguageServers::ClientConnection(move(socket))
     {
         m_autocomplete_engine = make<CppComprehensionEngine>(m_filedb);
         m_autocomplete_engine->set_declarations_of_document_callback = [this](const String& filename, Vector<GUI::AutocompleteProvider::Declaration>&& declarations) {
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp b/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
index b40b972a92..3fd711bbc2 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Cpp/main.cpp
@@ -6,14 +6,12 @@
 
 #include "ClientConnection.h"
 #include "Tests.h"
-#include <AK/LexicalPath.h>
 #include <LibCore/ArgsParser.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/LocalServer.h>
 #include <LibCore/System.h>
-#include <LibIPC/ClientConnection.h>
+#include <LibIPC/SingleServer.h>
 #include <LibMain/Main.h>
-#include <unistd.h>
 
 static ErrorOr<int> mode_server();
 
@@ -36,8 +34,7 @@ ErrorOr<int> mode_server()
     Core::EventLoop event_loop;
     TRY(Core::System::pledge("stdio unix recvfd rpath"));
 
-    auto socket = TRY(Core::LocalSocket::take_over_accepted_socket_from_system_server());
-    (void)IPC::new_client_connection<LanguageServers::Cpp::ClientConnection>(move(socket), 1);
+    auto client = TRY(IPC::take_over_accepted_client_from_system_server<LanguageServers::Cpp::ClientConnection>());
 
     TRY(Core::System::pledge("stdio recvfd rpath"));
     TRY(Core::System::unveil("/usr/include", "r"));
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Shell/ClientConnection.h b/Userland/DevTools/HackStudio/LanguageServers/Shell/ClientConnection.h
index 3eb2adbde6..bedce254d9 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Shell/ClientConnection.h
+++ b/Userland/DevTools/HackStudio/LanguageServers/Shell/ClientConnection.h
@@ -16,8 +16,8 @@ class ClientConnection final : public LanguageServers::ClientConnection {
     C_OBJECT(ClientConnection);
 
 private:
-    ClientConnection(NonnullRefPtr<Core::LocalSocket> socket, int client_id)
-        : LanguageServers::ClientConnection(move(socket), client_id)
+    ClientConnection(NonnullRefPtr<Core::LocalSocket> socket)
+        : LanguageServers::ClientConnection(move(socket))
     {
         m_autocomplete_engine = make<ShellComprehensionEngine>(m_filedb);
         m_autocomplete_engine->set_declarations_of_document_callback = [this](const String& filename, Vector<GUI::AutocompleteProvider::Declaration>&& declarations) {
diff --git a/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp b/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
index 7b4c4b8a69..a36673ca6c 100644
--- a/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
+++ b/Userland/DevTools/HackStudio/LanguageServers/Shell/main.cpp
@@ -8,7 +8,7 @@
 #include <LibCore/EventLoop.h>
 #include <LibCore/LocalServer.h>
 #include <LibCore/System.h>
-#include <LibIPC/ClientConnection.h>
+#include <LibIPC/SingleServer.h>
 #include <LibMain/Main.h>
 
 ErrorOr<int> serenity_main(Main::Arguments)
@@ -16,8 +16,8 @@ ErrorOr<int> serenity_main(Main::Arguments)
     Core::EventLoop event_loop;
     TRY(Core::System::pledge("stdio unix rpath recvfd"));
 
-    auto socket = TRY(Core::LocalSocket::take_over_accepted_socket_from_system_server());
-    (void)IPC::new_client_connection<LanguageServers::Shell::ClientConnection>(move(socket), 1);
+    auto client = TRY(IPC::take_over_accepted_client_from_system_server<LanguageServers::Shell::ClientConnection>());
+
     TRY(Core::System::pledge("stdio rpath recvfd"));
     TRY(Core::System::unveil("/etc/passwd", "r"));