SQLServer+SQL+LibSQL: Allow sql client to specify the database name

The database the sql client connected to was 'hardcoded' to the login
name of the calling user.
- Extended the IPC API to be more expressive when connecting, by
returning the name of the database the client connected to in the
'connected' callback.
- Gave the sql client a command line argument (-d/--database) allowing
an alternative database name to be specified

A subsequent commit will have a dot command allowing the user to
connect to different databases from the same sql session.

Userland/Libraries/LibSQL/SQLClient.cpp

@@ -12,10 +12,10 @@ SQLClient::~SQLClient()
 {
 }
 
-void SQLClient::connected(int connection_id)
+void SQLClient::connected(int connection_id, String const& connected_to_database)
 {
     if (on_connected)
-        on_connected(connection_id);
+        on_connected(connection_id, connected_to_database);
 }
 
 void SQLClient::disconnected(int connection_id)

Userland/Libraries/LibSQL/SQLClient.h

@@ -18,7 +18,7 @@ class SQLClient
     C_OBJECT(SQLClient);
     virtual ~SQLClient();
 
-    Function<void(int)> on_connected;
+    Function<void(int, String const&)> on_connected;
     Function<void(int)> on_disconnected;
     Function<void(int, int, String const&)> on_connection_error;
     Function<void(int, int, String const&)> on_execution_error;
@@ -32,7 +32,7 @@ private:
     {
     }
 
-    virtual void connected(int connection_id) override;
+    virtual void connected(int connection_id, String const& connected_to_database) override;
     virtual void connection_error(int connection_id, int code, String const& message) override;
     virtual void execution_success(int statement_id, bool has_results, int created, int updated, int deleted) override;
     virtual void next_result(int statement_id, Vector<String> const&) override;

Userland/Services/SQLServer/DatabaseConnection.cpp

@@ -43,7 +43,7 @@ DatabaseConnection::DatabaseConnection(String database_name, int client_id)
         m_accept_statements = true;
         auto client_connection = ClientConnection::client_connection_for(m_client_id);
         if (client_connection)
-            client_connection->async_connected(m_connection_id);
+            client_connection->async_connected(m_connection_id, m_database_name);
         else
             warnln("Cannot notify client of database connection. Client disconnected");
     });

Userland/Services/SQLServer/SQLClient.ipc

@@ -1,6 +1,6 @@
 endpoint SQLClient
 {
-    connected(int connection_id) =|
+    connected(int connection_id, String connected_to_database) =|
     connection_error(int connection_id, int code, String message) =|
     execution_success(int statement_id, bool has_results, int created, int updated, int deleted) =|
     next_result(int statement_id, Vector<String> row) =|

Userland/Utilities/sql.cpp

@@ -7,6 +7,7 @@
 #include <AK/Format.h>
 #include <AK/String.h>
 #include <AK/StringBuilder.h>
+#include <LibCore/ArgsParser.h>
 #include <LibCore/StandardPaths.h>
 #include <LibLine/Editor.h>
 #include <LibSQL/AST/Lexer.h>
@@ -97,8 +98,15 @@ void handle_command(StringView command)
 
 }
 
-int main()
+int main(int argc, char** argv)
 {
+    String database_name(getlogin());
+
+    Core::ArgsParser args_parser;
+    args_parser.set_general_help("This is a client for the SerenitySQL database server.");
+    args_parser.add_option(database_name, "Database to connect to", "database", 'd', "database");
+    args_parser.parse(argc, argv);
+
     s_editor = Line::Editor::construct();
     s_editor->load_history(s_history_path);
 
@@ -172,8 +180,8 @@ int main()
         sql_client->async_disconnect(the_connection_id);
     };
 
-    sql_client->on_connected = [&](int connection_id) {
-        outln("** Connected to {} **", getlogin());
+    sql_client->on_connected = [&](int connection_id, String const& connected_to_database) {
+        outln("** Connected to {} **", connected_to_database);
         the_connection_id = connection_id;
         read_sql();
     };
@@ -212,7 +220,7 @@ int main()
         loop.quit(0);
     };
 
-    sql_client->connect(getlogin());
+    sql_client->connect(database_name);
     auto rc = loop.exec();
 
     s_editor->save_history(s_history_path);