@orbit/records/dist/modules/record-key-map.js

A flexible data access and synchronization layer.

import { deepGet, deepSet } from '@orbit/utils';
/**
 * Maintains a map between records' ids and keys.
 */
export class RecordKeyMap {
    constructor() {
        this.reset();
    }
    /**
     * Resets the contents of the key map.
     */
    reset() {
        this._idsToKeys = {};
        this._keysToIds = {};
    }
    /**
     * Return a key value given a model type, key name, and id.
     */
    idToKey(type, keyName, idValue) {
        return deepGet(this._idsToKeys, [type, keyName, idValue]);
    }
    /**
     * Return an id value given a model type, key name, and key value.
     */
    keyToId(type, keyName, keyValue) {
        return deepGet(this._keysToIds, [type, keyName, keyValue]);
    }
    /**
     * Store the id and key values of a record in this key map.
     */
    pushRecord(record) {
        const { type, id, keys } = record;
        if (!keys || !id) {
            return;
        }
        Object.keys(keys).forEach((keyName) => {
            let keyValue = keys[keyName];
            if (keyValue) {
                deepSet(this._idsToKeys, [type, keyName, id], keyValue);
                deepSet(this._keysToIds, [type, keyName, keyValue], id);
            }
        });
    }
    /**
     * Given a record, find the cached id if it exists.
     */
    idFromKeys(type, keys) {
        for (let key of Object.keys(keys)) {
            let value = keys[key];
            if (value) {
                return this.keyToId(type, key, value);
            }
        }
    }
}
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