90 lines
3.2 KiB
Dart
90 lines
3.2 KiB
Dart
class IRCMessage {
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final Map<String, String> tags;
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final String? user;
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String command;
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String? message;
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IRCMessage({required this.tags, required this.command, required this.user, required this.message});
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/// Parses an IRC string and returns its corresponding [IRCMessage] object.
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factory IRCMessage.fromString(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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// tmi.twitch.tv means the message was sent by Twitch rather than a user, so will be irrelevant.
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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 an associated 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(
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tags: mappedTags,
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command: splitMessage[1],
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user: user,
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message: message,
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);
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}
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}
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class ROOMSTATE {
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final String emoteOnly;
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final String followersOnly;
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final String r9k;
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final String slowMode;
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final String subMode;
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ROOMSTATE({
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this.emoteOnly = "0",
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this.followersOnly = "0",
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this.r9k = "0",
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this.slowMode = "0",
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this.subMode = "0",
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});
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// Create a new copy with the paremeters from the provided [IRCMessage]
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ROOMSTATE copyWith(IRCMessage ircMessage) {
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return ROOMSTATE(
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emoteOnly: ircMessage.tags['emote-only'] ?? emoteOnly,
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followersOnly: ircMessage.tags['followers-only'] ?? followersOnly,
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r9k: ircMessage.tags['r9k'] ?? r9k,
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slowMode: ircMessage.tags['slow'] ?? slowMode,
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subMode: ircMessage.tags['subs-only'] ?? subMode,
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);
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}
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}
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