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Userland: Introduce ConfigServer and LibConfig

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ConfigServer is an IPC service that provides access to application
configuration and settings. The idea is to replace all uses of
Core::ConfigFile with IPC requests to ConfigServer.

This first cut of the API is pretty similar to Core::ConfigFile.

The old:

    auto config = Core::ConfigFile::open_for_app("App");
    auto value = config->read_entry("Group", "Key");

The new:

    auto value = Config::read_string("App", "Group", "Key");

ConfigServer uses the ~/.config directory as its backing store
and all the files remain human-editable. :^)
This commit is contained in:
Andreas Kling 2021-08-25 19:35:19 +02:00
parent c97f7ea23b
commit bdcd0abf9d
12 changed files with 319 additions and 0 deletions
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72
Userland/Services/ConfigServer/ClientConnection.cpp Normal file
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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "ClientConnection.h"
#include <ConfigServer/ConfigClientEndpoint.h>
#include <LibCore/ConfigFile.h>
namespace ConfigServer {
static HashMap<int, RefPtr<ClientConnection>> s_connections;
ClientConnection::ClientConnection(NonnullRefPtr<Core::LocalSocket> client_socket, int client_id)
: IPC::ClientConnection<ConfigClientEndpoint, ConfigServerEndpoint>(*this, move(client_socket), client_id)
{
s_connections.set(client_id, *this);
}
ClientConnection::~ClientConnection()
{
}
void ClientConnection::die()
{
s_connections.remove(client_id());
}
Messages::ConfigServer::ReadStringValueResponse ClientConnection::read_string_value(String const& domain, String const& group, String const& key)
{
auto config = Core::ConfigFile::open_for_app(domain);
if (!config->has_key(group, key))
return Optional<String> {};
return Optional<String> { config->read_entry(group, key) };
}
Messages::ConfigServer::ReadI32ValueResponse ClientConnection::read_i32_value(String const& domain, String const& group, String const& key)
{
auto config = Core::ConfigFile::open_for_app(domain);
if (!config->has_key(group, key))
return Optional<i32> {};
return Optional<i32> { config->read_num_entry(group, key) };
}
Messages::ConfigServer::ReadBoolValueResponse ClientConnection::read_bool_value(String const& domain, String const& group, String const& key)
{
auto config = Core::ConfigFile::open_for_app(domain);
if (!config->has_key(group, key))
return Optional<bool> {};
return Optional<bool> { config->read_bool_entry(group, key) };
}
void ClientConnection::write_string_value(String const& domain, String const& group, String const& key, String const& value)
{
auto config = Core::ConfigFile::open_for_app(domain, Core::ConfigFile::AllowWriting::Yes);
config->write_entry(group, key, value);
}
void ClientConnection::write_i32_value(String const& domain, String const& group, String const& key, i32 value)
{
auto config = Core::ConfigFile::open_for_app(domain, Core::ConfigFile::AllowWriting::Yes);
config->write_num_entry(group, key, value);
}
void ClientConnection::write_bool_value(String const& domain, String const& group, String const& key, bool value)
{
auto config = Core::ConfigFile::open_for_app(domain, Core::ConfigFile::AllowWriting::Yes);
config->write_bool_entry(group, key, value);
}
}