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Export push processor & method for converting matrix glob to regexp (#4763)

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* Export push processor method for converting matrix glob to regexp

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Export pushProcessor from MatrixClient

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Add capturing group around pattern match

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Improve comment

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
This commit is contained in:
Michael Telatynski
2025-03-21 09:11:04 +00:00
committed by GitHub
parent 0760c5f64c
commit 8061fa924d
2 changed files with 24 additions and 17 deletions
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39
src/pushprocessor.ts
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@@ -308,6 +308,26 @@ export class PushProcessor {
return newRules;
}
/**
* Create a RegExp object for the given glob pattern with a single capture group around the pattern itself, caching the result.
* No cache invalidation is present currently,
* as this will be inherently bounded to the size of the user's own push rules.
* @param pattern - the glob pattern to convert to a RegExp
* @param alignToWordBoundary - whether to align the pattern to word boundaries, as specified for `content.body` matches
* @param flags - the flags to pass to the RegExp constructor, defaults to case-insensitive
*/
public static getPushRuleGlobRegex(pattern: string, alignToWordBoundary = false, flags = "i"): RegExp {
const [prefix, suffix] = alignToWordBoundary ? ["(^|\\W)", "(\\W|$)"] : ["^", "$"];
if (!PushProcessor.cachedGlobToRegex[pattern]) {
PushProcessor.cachedGlobToRegex[pattern] = new RegExp(
prefix + "(" + globToRegexp(pattern) + ")" + suffix,
flags,
);
}
return PushProcessor.cachedGlobToRegex[pattern];
}
/**
* Pre-caches the parsed keys for push rules and cleans out any obsolete cache
* entries. Should be called after push rules are updated.
@@ -567,11 +587,9 @@ export class PushProcessor {
return false;
}
const regex =
cond.key === "content.body"
? this.createCachedRegex("(^|\\W)", cond.pattern, "(\\W|$)")
: this.createCachedRegex("^", cond.pattern, "$");
// Align to word boundary on `content.body` matches, whole string otherwise
// https://spec.matrix.org/v1.13/client-server-api/#conditions-1
const regex = PushProcessor.getPushRuleGlobRegex(cond.pattern, cond.key === "content.body");
return !!val.match(regex);
}
@@ -621,17 +639,6 @@ export class PushProcessor {
);
}
private createCachedRegex(prefix: string, glob: string, suffix: string): RegExp {
if (PushProcessor.cachedGlobToRegex[glob]) {
return PushProcessor.cachedGlobToRegex[glob];
}
PushProcessor.cachedGlobToRegex[glob] = new RegExp(
prefix + globToRegexp(glob) + suffix,
"i", // Case insensitive
);
return PushProcessor.cachedGlobToRegex[glob];
}
/**
* Parse the key into the separate fields to search by splitting on
* unescaped ".", and then removing any escape characters.