@splitsoftware/splitio-commons/esm/evaluator/condition/index.js

Split JavaScript SDK common components

import { getTreatment, shouldApplyRollout } from './engineUtils';
import { thenable } from '../../utils/promise/thenable';
import { NOT_IN_SPLIT } from '../../utils/labels';
// Build Evaluation object if and only if matchingResult is true
function match(log, matchingResult, bucketingKey, seed, treatments, label) {
    if (matchingResult) {
        return treatments ? // Feature flag
            {
                treatment: getTreatment(log, bucketingKey, seed, treatments),
                label: label
            } : // Rule-based segment
            true;
    }
    // else we should notify the engine to continue evaluating
    return undefined;
}
// Condition factory
export function conditionContext(log, matcherEvaluator, treatments, label, conditionType) {
    return function conditionEvaluator(key, seed, trafficAllocation, trafficAllocationSeed, attributes, splitEvaluator) {
        // Whitelisting has more priority than traffic allocation, so we don't apply this filtering to those conditions.
        if (conditionType === 'ROLLOUT' && !shouldApplyRollout(trafficAllocation, key.bucketingKey, trafficAllocationSeed)) {
            return {
                treatment: undefined,
                label: NOT_IN_SPLIT
            };
        }
        // matcherEvaluator could be Async, this relays on matchers return value, so we need
        // to verify for thenable before play with the result.
        // Also, we pass splitEvaluator function in case we have a matcher that needs to evaluate another split,
        // as well as the entire key object for the same reason.
        var matches = matcherEvaluator(key, attributes, splitEvaluator);
        if (thenable(matches)) {
            return matches.then(function (result) { return match(log, result, key.bucketingKey, seed, treatments, label); });
        }
        return match(log, matches, key.bucketingKey, seed, treatments, label);
    };
}