103 lines
3.8 KiB
Dart
103 lines
3.8 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:frosty/models/irc_message.dart';
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class IRC {
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/// Parses an IRC string and returns its corresponding [IRCMessage] object.
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static IRCMessage parse(String whole) {
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// We have three parts:
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// 1. The tags of the IRC message
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// 2. The metadata (user, command, and channel)
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// 3. The message itself
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// First, slice the message tags (1) and set aside the rest for later.
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// Each part is separated by a space, so we'll start off by breaking off the tags and parsing them.
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// Obtain the index to break off the tags.
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final tagAndIrcMessageDivider = whole.indexOf(' ');
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// Get the tags substring and escape characters.
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// IRC messages escape spaces with \s.
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final tags = whole.substring(1, tagAndIrcMessageDivider).replaceAll('\\s', ' ');
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// Next, parse and map the tags.
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final mappedTags = <String, String>{};
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// Loop through each tag and store their key value pairs into the map.
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for (final tag in tags.split(';')) {
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// Skip if the tag has no value.
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if (tag.endsWith('=')) continue;
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final tagSplit = tag.split('=');
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mappedTags[tagSplit[0]] = tagSplit[1];
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}
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// Now we'll parse the message itself.
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// Obtain the entire substring after the tags and excluding the first : (colon)
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final ircMessage = whole.substring(tagAndIrcMessageDivider + 2);
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// Split each section of the message (part 2 and its subparts and part 3).
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// Index 0 contains the username of sender (user) or tmi.twitch.tv depending on the command
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// Index 1 is command type
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// Index 2 is #channel name that we are currently connected to
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// Index 3 and beyond is the :message (word by word) that is sent by the user or empty depending on the command
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final splitMessage = ircMessage.split(' ');
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// If the username exists, set it.
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final String? user = splitMessage[0] == 'tmi.twitch.tv' ? null : splitMessage[0].substring(0, splitMessage[0].indexOf('!'));
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// If there is a message, set it.
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final String? message = splitMessage.length > 3 ? splitMessage.sublist(3).join(' ').substring(1) : null;
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return IRCMessage(tags: mappedTags, command: splitMessage[1], user: user, message: message);
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}
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// Applies the given CLEARCHAT message to a list and returns the result.
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static void clearChat({required List<IRCMessage> messages, required IRCMessage ircMessage}) {
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debugPrint('CLEARCHAT');
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// If there is no message, it means that entire chat was cleared.
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if (ircMessage.message == null) {
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// messages.clear();
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return;
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}
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final bannedUser = ircMessage.message;
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final banDuration = ircMessage.tags['ban-duration'];
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messages.asMap().forEach((i, message) {
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if (message.user! == bannedUser) {
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messages[i].command = 'CLEARCHAT';
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if (banDuration != null) {
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messages[i].tags['ban-duration'] = banDuration;
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}
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}
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});
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}
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// Applies the given CLEARMSG message to a list and returns the result.
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static void clearMsg({required List<IRCMessage> messages, required IRCMessage ircMessage}) {
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// final targetUser = ircMessage.tags['login'];
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final targetId = ircMessage.tags['target-msg-id'];
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// Search for the message associated with the ID and indicate the the message was deleted.
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for (var i = 0; i < messages.length; i++) {
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if (messages[i].tags['id'] == targetId) {
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messages[i].command = 'CLEARMSG';
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break;
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}
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}
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}
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static void userNotice({required List<IRCMessage> messages, required IRCMessage ircMessage}) {
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debugPrint('USERNOTICE');
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}
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static void addMessage({required List<IRCMessage> messages, required String userState, required String sentMessage}) {
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debugPrint('USERSTATE');
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final userChatMessage = parse(userState);
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userChatMessage.message = sentMessage;
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messages.add(userChatMessage);
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}
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}
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