jsonld-streaming-parser/lib/containerhandler/ContainerHandlerIdentifier.js

A fast and lightweight streaming JSON-LD parser

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ContainerHandlerIdentifier = void 0;
/**
 * Container handler for @id.
 *
 * It assumes that the current key is the identifier of the current value.
 * This will add this value to the parent node.
 */
class ContainerHandlerIdentifier {
    canCombineWithGraph() {
        return true;
    }
    async handle(containers, parsingContext, util, keys, value, depth) {
        let id;
        // First check if the child node already has a defined id.
        if (parsingContext.emittedStack[depth + 1] && parsingContext.idStack[depth + 1]) {
            // Use the existing identifier
            id = parsingContext.idStack[depth + 1][0];
        }
        else {
            // Create the identifier
            const keyUnaliased = await util.getContainerKey(keys[depth], keys, depth);
            const maybeId = keyUnaliased !== null
                ? await util.resourceToTerm(await parsingContext.getContext(keys), keys[depth])
                : util.dataFactory.blankNode();
            // Do nothing if the id is invalid
            if (!maybeId) {
                parsingContext.emittedStack[depth] = false; // Don't emit the predicate owning this container.
                return;
            }
            id = maybeId;
            // Insert the id into the stack so that buffered children can make us of it.
            parsingContext.idStack[depth + 1] = [id];
        }
        // Insert the id into the stack so that parents can make use of it.
        // Insert it as an array because multiple id container entries may exist
        let ids = parsingContext.idStack[depth];
        if (!ids) {
            ids = parsingContext.idStack[depth] = [];
        }
        // Only insert the term if it does not exist yet in the array.
        if (!ids.some((term) => term.equals(id))) {
            ids.push(id);
        }
        // Flush any pending flush buffers
        if (!await parsingContext.handlePendingContainerFlushBuffers()) {
            parsingContext.emittedStack[depth] = false; // Don't emit the predicate owning this container.
        }
    }
}
exports.ContainerHandlerIdentifier = ContainerHandlerIdentifier;
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