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WordList was matching everything. (#427)

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Made several improvements to catch edge cases.
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Gnuxie 2022-11-22 10:37:37 +00:00 committed by GitHub
parent 4b357732eb
commit aa50ab8e00
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1 changed files with 19 additions and 16 deletions
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35
src/protections/WordList.ts
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@ -64,6 +64,9 @@ export class WordList extends Protection {
if (event['type'] === 'm.room.message') {
const message = content['formatted_body'] || content['body'] || null;
if (!message) {
return;
}
// Check conditions first
if (minsBeforeTrusting > 0) {
@ -84,25 +87,25 @@ export class WordList extends Protection {
return
}
}
if (this.badWords === null) {
// Create a mega-regex from all the tiny baby regexs
try {
this.badWords = new RegExp(
"(" + mjolnir.config.protections.wordlist.words.join(")|(") + ")",
"i"
);
} catch (ex) {
await mjolnir.managementRoomOutput.logMessage(LogLevel.ERROR, "WordList", `Could not produce a regex from the word list:\n${ex}.`)
if (!this.badWords) {
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#escaping
const escapeRegExp = (string: string) => {
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
};
// Create a mega-regex from all the tiny words.
const words = mjolnir.config.protections.wordlist.words.filter(word => word.length !== 0).map(escapeRegExp);
if (words.length === 0) {
mjolnir.managementRoomOutput.logMessage(LogLevel.ERROR, "WordList", `Someone turned on the word list protection without configuring any words. Disabling.`);
this.enabled = false;
return;
}
this.badWords = new RegExp(words.join("|"), "i");
}
if (!message) {
return;
}
const matches = message.match(this.badWords!);
if (matches) {
const reason = `bad word: ${matches[0]}`;
const match = this.badWords!.exec(message);
if (match) {
const reason = `bad word: ${match[0]}`;
return [new ConsequenceBan(reason), new ConsequenceRedact(reason)];
}
}