ketting/dist/state/collection-json.js

Opinionated HATEOAS / Rest client.

import { BaseState } from './base-state.js';
import { parseLink } from '../http/util.js';
/**
 * Represents a resource state in the HAL format
 */
export class CjState extends BaseState {
    serializeBody() {
        throw new Error('Reserializing Collection+JSON states is not yet supported. Please log an issue in the Ketting project to help figure out how this should be done');
    }
}
/**
 * Turns a HTTP response into a CjState
 */
export const factory = async (client, uri, response) => {
    const body = await response.json();
    const links = parseLink(uri, response.headers.get('Link'));
    links.add(...parseCjLinks(uri, body));
    // Remove _links and _embedded from body
    const { _embedded, _links, ...newBody } = body;
    return new CjState({
        client,
        uri,
        data: newBody,
        headers: response.headers,
        links,
    });
};
function parseCjLinks(contextUri, body) {
    const result = [];
    if (body.collection.links !== undefined) {
        // Lets start with all links from the links property.
        for (const link of body.collection.links) {
            result.push({
                context: contextUri,
                href: link.href,
                rel: link.rel,
                title: link.name,
            });
        }
    }
    if (body.collection.items !== undefined) {
        // Things that are in the 'items' array should also be considered links
        // with the 'item' link relationship.
        for (const item of body.collection.items) {
            if (!item.href) {
                continue;
            }
            result.push({
                context: contextUri,
                href: item.href,
                rel: 'item',
            });
        }
    }
    if (body.collection.queries !== undefined) {
        // Things that are in the 'queries' array can be considered links too.
        for (const query of body.collection.queries) {
            if (!query.data) {
                // Non-templated
                result.push({
                    context: contextUri,
                    href: query.href,
                    rel: query.rel,
                    title: query.name,
                });
            }
            else {
                // This query has a data property so we need 50% more magic
                result.push({
                    context: contextUri,
                    href: query.href + query.data.map(property => '{?' + property.name + '}').join(''),
                    templated: true,
                    rel: query.rel,
                    title: query.name,
                });
            }
        }
    }
    return result;
}
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