cinny/src/app/hooks/usePushRule.ts

import { IPushRule, IPushRules, PushRuleKind, RuleId } from 'matrix-js-sdk';
import { useMemo } from 'react';

export type PushRuleData = {
  kind: PushRuleKind;
  pushRule: IPushRule;
};

export const orderedPushRuleKinds: PushRuleKind[] = [
  PushRuleKind.Override,
  PushRuleKind.ContentSpecific,
  PushRuleKind.RoomSpecific,
  PushRuleKind.SenderSpecific,
  PushRuleKind.Underride,
];

export const getPushRule = (
  pushRules: IPushRules,
  ruleId: RuleId | string
): PushRuleData | undefined => {
  const { global } = pushRules;

  let ruleData: PushRuleData | undefined;

  orderedPushRuleKinds.some((kind) => {
    const rules = global[kind];
    const pushRule = rules?.find((r) => r.rule_id === ruleId);
    if (pushRule) {
      ruleData = {
        kind,
        pushRule,
      };
      return true;
    }
    return false;
  });

  return ruleData;
};

export const usePushRule = (
  pushRules: IPushRules,
  ruleId: RuleId | string
): PushRuleData | undefined => useMemo(() => getPushRule(pushRules, ruleId), [pushRules, ruleId]);