semantic-network/lib/utils/equalityUtil.js

A utility library for manipulating a list of links that form a semantic interface to a network of resources.

import { LinkUtil } from 'semantic-link';
import { CanonicalOrSelf } from './comparators/canonicalOrSelf';
import { TrackedRepresentationUtil } from './trackedRepresentationUtil';
import { instanceOfTrackedRepresentation } from './instanceOf/instanceOfTrackedRepresentation';
export class EqualityUtil {
    /**
     * Checks if two resource identities are the same.
     *
     * @default {@link CanonicalOrSelf}
     */
    static matches(lvalue, rvalue, relationshipType = CanonicalOrSelf) {
        const lUri = LinkUtil.getUri(lvalue, relationshipType);
        const rUri = LinkUtil.getUri(rvalue, relationshipType);
        if (lUri && rUri) {
            return lUri === rUri;
        }
        return false;
    }
    /**
     * Checks if the identity and the version both match
     */
    static matchesIdAndETag(lvalue, rvalue, relationshipType) {
        if (EqualityUtil.matches(lvalue, rvalue, relationshipType)) {
            return EqualityUtil.matchesETag(lvalue, rvalue);
        }
        return false;
    }
    /**
     * Checks if there is no difference in eTags (both empty also equals same)
     */
    static matchesETag(lvalue, rvalue) {
        const lEtag = instanceOfTrackedRepresentation(lvalue) && TrackedRepresentationUtil.getETag(lvalue) || '';
        const rEtag = instanceOfTrackedRepresentation(rvalue) && TrackedRepresentationUtil.getETag(rvalue) || '';
        return lEtag === rEtag;
    }
}
export const defaultEqualityMatcher = EqualityUtil.matches;
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