jinaga/dist/specification/feed-cache.js

Data management for web and mobile applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.FeedCache = void 0;
const hash_1 = require("../fact/hash");
const skeleton_1 = require("./skeleton");
class FeedCache {
    constructor() {
        this.feedByHash = {};
    }
    addFeeds(feeds, namedStart) {
        const feedsByHash = feeds.reduce((map, feed) => {
            const skeleton = (0, skeleton_1.skeletonOfSpecification)(feed);
            const indexedStart = skeleton.inputs.map(input => ({
                factReference: namedStart[feed.given[input.inputIndex].name],
                index: input.inputIndex
            }));
            const feedIdentifier = {
                start: indexedStart,
                skeleton
            };
            const feedObject = {
                namedStart,
                feed
            };
            const hash = urlSafe((0, hash_1.computeObjectHash)(feedIdentifier));
            return (Object.assign(Object.assign({}, map), { [hash]: feedObject }));
        }, {});
        const feedHashes = Object.keys(feedsByHash);
        this.feedByHash = Object.assign(Object.assign({}, this.feedByHash), feedsByHash);
        return feedHashes;
    }
    getFeed(feed) {
        return this.feedByHash[feed];
    }
}
exports.FeedCache = FeedCache;
function urlSafe(hash) {
    return hash.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
}
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