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const std = @import("std");
const ArrayList = std.ArrayList;
const Allocator = std.mem.Allocator;
const Reader = std.Io.Reader;
const Payload = @import("Payload.zig");
pub const parse = @import("parse.zig");
pub const Control = @typeInfo(Message).@"union".tag_type.?;
pub const Message = union(enum) {
INFO: ServerInfo,
CONNECT: Connect,
PUB: Pub,
HPUB: HPub,
SUB: Sub,
UNSUB: Unsub,
MSG: Msg,
HMSG: HMsg,
PING,
PONG,
@"+OK": void,
@"-ERR": []const u8,
pub const ServerInfo = struct {
/// The unique identifier of the NATS server.
server_id: []const u8,
/// The name of the NATS server.
server_name: []const u8,
/// The version of NATS.
version: []const u8,
/// The version of golang the NATS server was built with.
go: []const u8 = "0.0.0",
/// The IP address used to start the NATS server,
/// by default this will be 0.0.0.0 and can be
/// configured with -client_advertise host:port.
host: []const u8 = "0.0.0.0",
/// The port number the NATS server is configured
/// to listen on.
port: u16 = 4222,
/// Whether the server supports headers.
headers: bool = false,
/// Maximum payload size, in bytes, that the server
/// will accept from the client.
max_payload: u64,
/// An integer indicating the protocol version of
/// the server. The server version 1.2.0 sets this
/// to 1 to indicate that it supports the "Echo"
/// feature.
proto: u32 = 1,
};
pub const Connect = struct {
verbose: bool = false,
pedantic: bool = false,
tls_required: bool = false,
auth_token: ?[]const u8 = null,
user: ?[]const u8 = null,
pass: ?[]const u8 = null,
name: ?[]const u8 = null,
lang: []const u8,
version: []const u8,
protocol: u32,
echo: ?bool = null,
sig: ?[]const u8 = null,
jwt: ?[]const u8 = null,
no_responders: ?bool = null,
headers: ?bool = null,
nkey: ?[]const u8 = null,
pub fn deinit(self: Connect, alloc: Allocator) void {
if (self.auth_token) |a| alloc.free(a);
if (self.user) |u| alloc.free(u);
if (self.pass) |p| alloc.free(p);
if (self.name) |n| alloc.free(n);
alloc.free(self.lang);
alloc.free(self.version);
if (self.sig) |s| alloc.free(s);
if (self.jwt) |j| alloc.free(j);
if (self.nkey) |n| alloc.free(n);
}
pub fn dupe(self: Connect, alloc: Allocator) !Connect {
var res = self;
res.auth_token = if (self.auth_token) |a| try alloc.dupe(u8, a) else null;
errdefer if (res.auth_token) |a| alloc.free(a);
res.user = if (self.user) |u| try alloc.dupe(u8, u) else null;
errdefer if (res.user) |u| alloc.free(u);
res.pass = if (self.pass) |p| try alloc.dupe(u8, p) else null;
errdefer if (res.pass) |p| alloc.free(p);
res.name = if (self.name) |n| try alloc.dupe(u8, n) else null;
errdefer if (res.name) |n| alloc.free(n);
res.lang = try alloc.dupe(u8, self.lang);
errdefer alloc.free(res.lang);
res.version = try alloc.dupe(u8, self.version);
errdefer alloc.free(res.version);
res.sig = if (self.sig) |s| try alloc.dupe(u8, s) else null;
errdefer if (res.sig) |s| alloc.free(s);
res.jwt = if (self.jwt) |j| try alloc.dupe(u8, j) else null;
errdefer if (res.jwt) |j| alloc.free(j);
res.nkey = if (self.nkey) |n| try alloc.dupe(u8, n) else null;
errdefer if (res.nkey) |n| alloc.free(n);
return res;
}
};
pub const Pub = struct {
/// The destination subject to publish to.
subject: []const u8,
/// The reply subject that subscribers can use to send a response back to the publisher/requestor.
reply_to: ?[]const u8 = null,
/// The message payload data.
payload: []const u8,
pub fn toMsg(self: Pub, sid: []const u8) Msg {
return .{
.subject = self.subject,
.sid = sid,
.reply_to = self.reply_to,
.payload = self.payload,
};
}
};
pub const HPub = struct {
header_bytes: usize,
@"pub": Pub,
pub fn deinit(self: HPub, alloc: Allocator) void {
self.@"pub".deinit(alloc);
}
pub fn toHMsg(self: HPub, alloc: Allocator, sid: []const u8) !HMsg {
return .{
.header_bytes = self.header_bytes,
.msg = try self.@"pub".toMsg(alloc, sid),
};
}
};
pub const HMsg = struct {
header_bytes: usize,
msg: Msg,
pub fn deinit(self: HMsg, alloc: Allocator) void {
self.msg.deinit(alloc);
}
pub fn dupe(self: HMsg, alloc: Allocator) !HMsg {
var res = self;
res.msg = try self.msg.dupe(alloc);
errdefer alloc.free(res.msg);
return res;
}
};
pub const Sub = struct {
/// The subject name to subscribe to.
subject: []const u8,
/// If specified, the subscriber will join this queue group.
queue_group: ?[]const u8,
/// A unique alphanumeric subscription ID, generated by the client.
sid: []const u8,
pub fn deinit(self: Sub, alloc: Allocator) void {
alloc.free(self.subject);
alloc.free(self.sid);
if (self.queue_group) |q| alloc.free(q);
}
};
pub const Unsub = struct {
/// The unique alphanumeric subscription ID of the subject to unsubscribe from.
sid: []const u8,
/// A number of messages to wait for before automatically unsubscribing.
max_msgs: ?usize = null,
pub fn deinit(self: Unsub, alloc: Allocator) void {
alloc.free(self.sid);
}
};
pub const Msg = struct {
subject: []const u8,
sid: []const u8,
reply_to: ?[]const u8,
payload: []const u8,
};
};
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