@iden3/js-jsonld-merklization/dist/node/esm/lib/quad-arr-key.js

json ld merklization library

import { getGraphName } from './utils';
import { NodeType } from './types/types';
export class QuadArrKey {
    constructor(q) {
        this.graph = getGraphName(q);
        const s = q.subject;
        switch (s.termType) {
            case NodeType.IRI:
                this.subject = { tp: NodeType.IRI, val: s.value };
                break;
            case NodeType.BlankNode:
                this.subject = { tp: NodeType.BlankNode, val: s.value };
                break;
            default:
                throw new Error('invalid subject type');
        }
        if (q.predicate.termType !== NodeType.IRI) {
            throw new Error('invalid predicate type');
        }
        this.predicate = q.predicate.value;
    }
    toString() {
        return JSON.stringify(this);
    }
}
QuadArrKey.countEntries = (nodes) => {
    const res = new Map();
    for (const q of nodes) {
        const key = new QuadArrKey(q);
        let c = res.get(key.toString()) ?? 0;
        res.set(key.toString(), ++c);
    }
    return res;
};