rxdeep/dist/es5/reverse.js

RxJS deep state management

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.reverse = void 0;
var changes_1 = require("./types/changes");
function clean(l) {
    if (l[l.length - 1] === undefined) {
        l.length--;
        clean(l);
    }
}
function reverse(change) {
    if (changes_1.isLeaf(change.trace)) {
        return {
            value: change.trace.from,
            trace: {
                from: change.trace.to,
                to: change.trace.from,
            }
        };
    }
    else {
        var revalue = Array.isArray(change.value) ? __spreadArrays(change.value) : __assign({}, change.value);
        var retrace = {
            subs: {}
        };
        for (var key in change.trace.subs) {
            var reversed = reverse({
                value: change.value ? change.value[key] : undefined,
                trace: change.trace.subs[key],
            });
            revalue[key] = reversed.value;
            retrace.subs[key] = reversed.trace;
        }
        if (Array.isArray(revalue)) {
            clean(revalue);
        }
        return {
            value: revalue,
            trace: retrace,
        };
    }
}
exports.reverse = reverse;
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