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Fix regex escape for prefix patterns

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Our regex escape function escapes proper regexes, however
it isn't meant to be shoved into a char class via string interpolation.

We need to also escape '-' if we do so.
This commit is contained in:
Reto Brunner 2022-06-24 10:55:33 +02:00
parent d72d8694bb
commit d6e1af0e7d
2 changed files with 24 additions and 2 deletions
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11
client/js/helpers/ircmessageparser/findChannels.ts
View file

@ -8,6 +8,13 @@ export type ChannelPart = Part & {
channel: string;
};
// escapes a regex in a way that's compatible to shove it in
// a regex char set (meaning it also escapes -)
function escapeRegExpCharSet(raw: string): string {
const escaped: string = escapeRegExp(raw);
return escaped.replace("-", "\\-");
}
// Given an array of channel prefixes (such as "#" and "&") and an array of user
// modes (such as "@" and "+"), this function extracts channels and nicks from a
// text.
@ -18,8 +25,8 @@ function findChannels(text: string, channelPrefixes: string[], userModes: string
// For example, a voiced user in #thelounge will have a /whois response of:
// > foo is on the following channels: +#thelounge
// We need to explicitly ignore user modes to parse such channels correctly.
const userModePattern = userModes.map(escapeRegExp).join("");
const channelPrefixPattern = channelPrefixes.map(escapeRegExp).join("");
const userModePattern = userModes.map(escapeRegExpCharSet).join("");
const channelPrefixPattern = channelPrefixes.map(escapeRegExpCharSet).join("");
const channelPattern = `(?:^|\\s)[${userModePattern}]*([${channelPrefixPattern}][^ \u0007]+)`;
const channelRegExp = new RegExp(channelPattern, "g");

15
test/client/js/helpers/ircmessageparser/findChannels.ts
View file

@ -122,6 +122,21 @@ describe("findChannels", () => {
expect(actual).to.deep.equal(expected);
});
it("should work with - in usermodes", () => {
const input = "-#a some -text";
const expected = [
{
channel: "#a",
start: 1,
end: 3,
},
];
const actual = findChannels(input, ["#"], ["#", "+", "-"]);
expect(actual).to.deep.equal(expected);
});
it("should handle multiple channelPrefix correctly", () => {
const input = "##test";
const expected = [