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const Message = @import("message_parser.zig").Message;
const std = @import("std");
pub const ClientState = struct {
id: usize,
connect: Message.Connect,
/// Messages that this client is trying to send.
send_queue: std.Io.Queue(Message),
send_queue_buffer: [1024]Message = undefined,
/// Messages that this client should receive.
recv_queue: std.Io.Queue(Message),
recv_queue_buffer: [1024]Message = undefined,
from_client: *std.Io.Reader,
to_client: *std.Io.Writer,
write_task: std.Io.Future(void),
read_task: std.Io.Future(void),
pub fn init(
io: std.Io,
allocator: std.mem.Allocator,
id: usize,
connect: Message.Connect,
in: *std.Io.Reader,
out: *std.Io.Writer,
) ClientState {
var res: ClientState = .{
.id = id,
.connect = connect,
.send_queue = undefined,
.recv_queue = undefined,
.from_client = in,
.to_client = out,
.write_task = undefined,
.read_task = undefined,
};
res.send_queue = .init(&res.send_queue_buffer);
res.recv_queue = .init(&res.recv_queue_buffer);
const write_task = io.async(processWrite, .{ &res, io, out });
// @compileLog(@TypeOf(write_task));
const read_task = io.async(processRead, .{ &res, io, allocator, in });
// @compileLog(@TypeOf(read_task));
res.write_task = write_task;
res.read_task = read_task;
return res;
}
fn processWrite(
self: *ClientState,
io: std.Io,
out: *std.Io.Writer,
) void {
while (true) {
const message = self.recv_queue.getOne(io) catch break;
switch (message) {
.@"+ok" => writeOk(out) catch break,
.pong => writePong(out) catch break,
.info => |info| writeInfo(out, info) catch break,
.msg => |m| writeMsg(out, m) catch break,
else => std.debug.panic("unimplemented write", .{}),
}
}
}
fn processRead(
self: *ClientState,
io: std.Io,
allocator: std.mem.Allocator,
in: *std.Io.Reader,
) void {
while (true) {
const next_message = Message.next(allocator, in) catch |err| switch (err) {
error.EndOfStream => {
break;
},
else => {
std.debug.panic("guh: {any}\n", .{err});
break;
// return err;
},
};
self.send_queue.putOne(io, next_message) catch break;
}
}
pub fn deinit(self: *ClientState, alloc: std.mem.Allocator) void {
_ = self;
// self.write_task.cancel() catch {
// std.debug.print("failed to cancel write task of {}\n", .{self.id});
// };
// self.read_taks.cancel() catch {
// std.debug.print("failed to cancel read task of {}\n", .{self.id});
// };
// TODO: dealloc things.
_ = alloc;
}
/// Return true if the value was put in the clients buffer to process, else false.
pub fn send(self: *ClientState, io: std.Io, msg: Message) std.Io.Cancelable!bool {
return (try self.recv_queue.put(io, &.{msg}, 0)) > 0;
}
pub fn next(self: *ClientState, io: std.Io) std.Io.Cancelable!Message {
return self.send_queue.getOne(io);
}
};
fn writeOk(out: *std.Io.Writer) !void {
_ = try out.write("+OK\r\n");
try out.flush();
}
fn writePong(out: *std.Io.Writer) !void {
_ = try out.write("PONG\r\n");
try out.flush();
}
pub fn writeInfo(out: *std.Io.Writer, info: Message.ServerInfo) !void {
_ = try out.write("INFO ");
try std.json.Stringify.value(info, .{}, out);
_ = try out.write("\r\n");
try out.flush();
}
fn writeMsg(out: *std.Io.Writer, msg: Message.Msg) !void {
std.debug.print("PRINTING MESSAGE\n\n\n\n", .{});
try out.print(
"MSG {s} {s} {s} {d}\r\n{s}\r\n",
.{
msg.subject,
msg.sid,
msg.reply_to orelse "",
msg.payload.len,
msg.payload,
},
);
try out.flush();
}
|
