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const std = @import("std");
const ProtocolError = @import("main.zig").ProtocolError;
const AuthType = @import("main.zig").AuthType;
const enum_from_int = @import("main.zig").enum_from_int;
const ClientError = @import("main.zig").ClientError;
const AuthenticationOk = @This();
const ByteArrayList = std.ArrayList(u8);
pub const Tag: u8 = 'R';
pub fn read(_: std.mem.Allocator, b: []const u8) !AuthenticationOk {
if (b.len != 4) return ProtocolError.InvalidMessageLength;
const auth_type = enum_from_int(AuthType, std.mem.readIntBig(u32, b[0..4])) orelse return ClientError.UnsupportedAuthType;
if (auth_type != AuthType.AuthTypeOk) return ProtocolError.InvalidAuthType;
return .{};
}
pub fn write(_: AuthenticationOk, _: std.mem.Allocator, stream_writer: anytype) !void {
try stream_writer.writeByte(Tag);
try stream_writer.writeIntBig(u32, 8);
try stream_writer.writeIntBig(u32, @intFromEnum(AuthType.AuthTypeOk));
}
pub fn deinit(_: *AuthenticationOk, _: std.mem.Allocator) void {}
test "round trip" {
const allocator = std.testing.allocator;
var sm = AuthenticationOk{};
defer sm.deinit(allocator);
var bal = ByteArrayList.init(allocator);
defer bal.deinit();
try sm.write(allocator, bal.writer());
var fbs = std.io.fixedBufferStream(bal.items);
var reader = fbs.reader();
const tag = try reader.readByte();
try std.testing.expectEqual(Tag, tag);
const len = try reader.readIntBig(u32);
const buf = try allocator.alloc(u8, len - 4);
defer allocator.free(buf);
try reader.readNoEof(buf);
var sm2 = try AuthenticationOk.read(allocator, buf);
defer sm2.deinit(allocator);
}
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