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119 lines
2.7 KiB
C++
119 lines
2.7 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "MessageCommands.hxx"
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#include "Request.hxx"
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#include "client/Client.hxx"
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#include "client/List.hxx"
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#include "client/Response.hxx"
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#include "Partition.hxx"
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#include <fmt/format.h>
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#include <cassert>
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#include <set>
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#include <string>
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#include <utility> // for std::unreachable()
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CommandResult
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handle_subscribe(Client &client, Request args, Response &r)
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{
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assert(args.size() == 1);
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const char *const channel_name = args[0];
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switch (client.Subscribe(channel_name)) {
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case Client::SubscribeResult::OK:
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return CommandResult::OK;
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case Client::SubscribeResult::INVALID:
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r.Error(ACK_ERROR_ARG, "invalid channel name");
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return CommandResult::ERROR;
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case Client::SubscribeResult::ALREADY:
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r.Error(ACK_ERROR_EXIST, "already subscribed to this channel");
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return CommandResult::ERROR;
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case Client::SubscribeResult::FULL:
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r.Error(ACK_ERROR_EXIST, "subscription list is full");
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return CommandResult::ERROR;
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}
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std::unreachable();
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}
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CommandResult
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handle_unsubscribe(Client &client, Request args, Response &r)
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{
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assert(args.size() == 1);
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const char *const channel_name = args[0];
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if (client.Unsubscribe(channel_name))
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return CommandResult::OK;
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else {
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r.Error(ACK_ERROR_NO_EXIST, "not subscribed to this channel");
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return CommandResult::ERROR;
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}
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}
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CommandResult
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handle_channels(Client &client, [[maybe_unused]] Request args, Response &r)
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{
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assert(args.empty());
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std::set<std::string, std::less<>> channels;
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for (const auto &c : client.GetPartition().clients) {
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const auto &subscriptions = c.GetSubscriptions();
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channels.insert(subscriptions.begin(),
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subscriptions.end());
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}
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for (const auto &channel : channels)
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r.Fmt("channel: {}\n", channel);
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return CommandResult::OK;
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}
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CommandResult
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handle_read_messages(Client &client,
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[[maybe_unused]] Request args, Response &r)
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{
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assert(args.empty());
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client.ConsumeMessages([&r](const auto &msg){
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r.Fmt("channel: {}\nmessage: {}\n",
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msg.GetChannel(), msg.GetMessage());
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});
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return CommandResult::OK;
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}
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CommandResult
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handle_send_message(Client &client, Request args, Response &r)
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{
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assert(args.size() == 2);
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const char *const channel_name = args[0];
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const char *const message_text = args[1];
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if (!client_message_valid_channel_name(channel_name)) {
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r.Error(ACK_ERROR_ARG, "invalid channel name");
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return CommandResult::ERROR;
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}
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bool sent = false;
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const ClientMessage msg(channel_name, message_text);
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for (auto &c : client.GetPartition().clients)
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if (c.PushMessage(msg))
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sent = true;
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if (sent)
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return CommandResult::OK;
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else {
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r.Error(ACK_ERROR_NO_EXIST,
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"nobody is subscribed to this channel");
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return CommandResult::ERROR;
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}
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}
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