@datorama/akita/src/lib/entitiesToMap.js

A Reactive State Management Tailored-Made for JS Applications

import { isNil } from './isNil';
import { coerceArray } from './coerceArray';
// @internal
export function entitiesToMap(state, options) {
    const map = {};
    const { filterBy, limitTo } = options;
    const { ids, entities } = state;
    if (!filterBy && !limitTo) {
        return entities;
    }
    const hasLimit = isNil(limitTo) === false;
    if (filterBy && hasLimit) {
        let count = 0;
        for (let i = 0, length = ids.length; i < length; i++) {
            if (count === limitTo)
                break;
            const id = ids[i];
            const entity = entities[id];
            const allPass = coerceArray(filterBy).every(fn => fn(entity, i));
            if (allPass) {
                map[id] = entity;
                count++;
            }
        }
    }
    else {
        const finalLength = Math.min(limitTo || ids.length, ids.length);
        for (let i = 0; i < finalLength; i++) {
            const id = ids[i];
            const entity = entities[id];
            if (!filterBy) {
                map[id] = entity;
                continue;
            }
            const allPass = coerceArray(filterBy).every(fn => fn(entity, i));
            if (allPass) {
                map[id] = entity;
            }
        }
    }
    return map;
}
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