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Add a traditional IRC wire protocol listener (RFC 1459/2812) on configurable port (default :6667), sharing business logic with the HTTP API via a new service layer. - IRC listener: NICK, USER, PASS, JOIN, PART, PRIVMSG, NOTICE, TOPIC, MODE, KICK, QUIT, NAMES, LIST, WHOIS, WHO, AWAY, OPER, INVITE, LUSERS, MOTD, PING/PONG, CAP - Service layer: shared logic for both transports including channel join (with Tier 2 checks: ban/invite/key/limit), message send (with ban + moderation checks), nick change, topic, kick, mode, quit broadcast, away, oper, invite - BroadcastQuit uses FanOut pattern (one insert, N enqueues) - HTTP handlers delegate to service for all command logic - Tier 2 mode operations (+b/+i/+s/+k/+l) use service methods Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
124 lines
2.5 KiB
Go
124 lines
2.5 KiB
Go
// Package ircserver implements a traditional IRC wire protocol
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// listener (RFC 1459/2812) that bridges to the neoirc HTTP/JSON
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// server internals.
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package ircserver
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import "strings"
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// Message represents a parsed IRC wire protocol message.
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type Message struct {
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// Prefix is the optional :prefix at the start (may be
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// empty for client-to-server messages).
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Prefix string
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// Command is the IRC command (e.g., "PRIVMSG", "NICK").
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Command string
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// Params holds the positional parameters, including the
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// trailing parameter (which was preceded by ':' on the
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// wire).
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Params []string
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}
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// ParseMessage parses a single IRC wire protocol line
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// (without the trailing CR-LF) into a Message.
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// Returns nil if the line is empty.
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//
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// IRC message format (RFC 1459 §2.3.1):
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//
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// [":" prefix SPACE] command { SPACE param } [SPACE ":" trailing]
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func ParseMessage(line string) *Message {
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if line == "" {
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return nil
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}
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msg := &Message{} //nolint:exhaustruct // fields set below
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// Extract prefix if present.
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if line[0] == ':' {
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idx := strings.IndexByte(line, ' ')
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if idx < 0 {
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// Only a prefix, no command — invalid.
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return nil
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}
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msg.Prefix = line[1:idx]
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line = line[idx+1:]
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}
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// Skip leading spaces.
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line = strings.TrimLeft(line, " ")
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if line == "" {
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return nil
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}
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// Extract command.
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idx := strings.IndexByte(line, ' ')
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if idx < 0 {
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msg.Command = strings.ToUpper(line)
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return msg
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}
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msg.Command = strings.ToUpper(line[:idx])
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line = line[idx+1:]
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// Extract parameters.
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for line != "" {
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line = strings.TrimLeft(line, " ")
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if line == "" {
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break
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}
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// Trailing parameter (everything after ':').
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if line[0] == ':' {
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msg.Params = append(msg.Params, line[1:])
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break
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}
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idx = strings.IndexByte(line, ' ')
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if idx < 0 {
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msg.Params = append(msg.Params, line)
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break
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}
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msg.Params = append(msg.Params, line[:idx])
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line = line[idx+1:]
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}
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return msg
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}
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// FormatMessage formats an IRC message into wire protocol
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// format (without the trailing CR-LF).
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func FormatMessage(
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prefix, command string,
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params ...string,
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) string {
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var buf strings.Builder
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if prefix != "" {
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buf.WriteByte(':')
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buf.WriteString(prefix)
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buf.WriteByte(' ')
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}
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buf.WriteString(command)
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for i, param := range params {
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buf.WriteByte(' ')
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isLast := i == len(params)-1
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needsColon := strings.Contains(param, " ") ||
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param == "" || param[0] == ':'
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if isLast && needsColon {
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buf.WriteByte(':')
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}
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buf.WriteString(param)
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}
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return buf.String()
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}
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