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Mini Shell
Object.defineProperty(exports, "__esModule", { value: true });
/*!
* https://github.com/Starcounter-Jack/JSON-Patch
* (c) 2017-2021 Joachim Wester
* MIT license
*/
var helpers_js_1 = require("./helpers.js");
var core_js_1 = require("./core.js");
var beforeDict = new WeakMap();
var Mirror = /** @class */ (function () {
function Mirror(obj) {
this.observers = new Map();
this.obj = obj;
}
return Mirror;
}());
var ObserverInfo = /** @class */ (function () {
function ObserverInfo(callback, observer) {
this.callback = callback;
this.observer = observer;
}
return ObserverInfo;
}());
function getMirror(obj) {
return beforeDict.get(obj);
}
function getObserverFromMirror(mirror, callback) {
return mirror.observers.get(callback);
}
function removeObserverFromMirror(mirror, observer) {
mirror.observers.delete(observer.callback);
}
/**
* Detach an observer from an object
*/
function unobserve(root, observer) {
observer.unobserve();
}
exports.unobserve = unobserve;
/**
* Observes changes made to an object, which can then be retrieved using generate
*/
function observe(obj, callback) {
var patches = [];
var observer;
var mirror = getMirror(obj);
if (!mirror) {
mirror = new Mirror(obj);
beforeDict.set(obj, mirror);
}
else {
var observerInfo = getObserverFromMirror(mirror, callback);
observer = observerInfo && observerInfo.observer;
}
if (observer) {
return observer;
}
observer = {};
mirror.value = helpers_js_1._deepClone(obj);
if (callback) {
observer.callback = callback;
observer.next = null;
var dirtyCheck = function () {
generate(observer);
};
var fastCheck = function () {
clearTimeout(observer.next);
observer.next = setTimeout(dirtyCheck);
};
if (typeof window !== 'undefined') { //not Node
window.addEventListener('mouseup', fastCheck);
window.addEventListener('keyup', fastCheck);
window.addEventListener('mousedown', fastCheck);
window.addEventListener('keydown', fastCheck);
window.addEventListener('change', fastCheck);
}
}
observer.patches = patches;
observer.object = obj;
observer.unobserve = function () {
generate(observer);
clearTimeout(observer.next);
removeObserverFromMirror(mirror, observer);
if (typeof window !== 'undefined') {
window.removeEventListener('mouseup', fastCheck);
window.removeEventListener('keyup', fastCheck);
window.removeEventListener('mousedown', fastCheck);
window.removeEventListener('keydown', fastCheck);
window.removeEventListener('change', fastCheck);
}
};
mirror.observers.set(callback, new ObserverInfo(callback, observer));
return observer;
}
exports.observe = observe;
/**
* Generate an array of patches from an observer
*/
function generate(observer, invertible) {
if (invertible === void 0) { invertible = false; }
var mirror = beforeDict.get(observer.object);
_generate(mirror.value, observer.object, observer.patches, "", invertible);
if (observer.patches.length) {
core_js_1.applyPatch(mirror.value, observer.patches);
}
var temp = observer.patches;
if (temp.length > 0) {
observer.patches = [];
if (observer.callback) {
observer.callback(temp);
}
}
return temp;
}
exports.generate = generate;
// Dirty check if obj is different from mirror, generate patches and update mirror
function _generate(mirror, obj, patches, path, invertible) {
if (obj === mirror) {
return;
}
if (typeof obj.toJSON === "function") {
obj = obj.toJSON();
}
var newKeys = helpers_js_1._objectKeys(obj);
var oldKeys = helpers_js_1._objectKeys(mirror);
var changed = false;
var deleted = false;
//if ever "move" operation is implemented here, make sure this test runs OK: "should not generate the same patch twice (move)"
for (var t = oldKeys.length - 1; t >= 0; t--) {
var key = oldKeys[t];
var oldVal = mirror[key];
if (helpers_js_1.hasOwnProperty(obj, key) && !(obj[key] === undefined && oldVal !== undefined && Array.isArray(obj) === false)) {
var newVal = obj[key];
if (typeof oldVal == "object" && oldVal != null && typeof newVal == "object" && newVal != null && Array.isArray(oldVal) === Array.isArray(newVal)) {
_generate(oldVal, newVal, patches, path + "/" + helpers_js_1.escapePathComponent(key), invertible);
}
else {
if (oldVal !== newVal) {
changed = true;
if (invertible) {
patches.push({ op: "test", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(oldVal) });
}
patches.push({ op: "replace", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(newVal) });
}
}
}
else if (Array.isArray(mirror) === Array.isArray(obj)) {
if (invertible) {
patches.push({ op: "test", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(oldVal) });
}
patches.push({ op: "remove", path: path + "/" + helpers_js_1.escapePathComponent(key) });
deleted = true; // property has been deleted
}
else {
if (invertible) {
patches.push({ op: "test", path: path, value: mirror });
}
patches.push({ op: "replace", path: path, value: obj });
changed = true;
}
}
if (!deleted && newKeys.length == oldKeys.length) {
return;
}
for (var t = 0; t < newKeys.length; t++) {
var key = newKeys[t];
if (!helpers_js_1.hasOwnProperty(mirror, key) && obj[key] !== undefined) {
patches.push({ op: "add", path: path + "/" + helpers_js_1.escapePathComponent(key), value: helpers_js_1._deepClone(obj[key]) });
}
}
}
/**
* Create an array of patches from the differences in two objects
*/
function compare(tree1, tree2, invertible) {
if (invertible === void 0) { invertible = false; }
var patches = [];
_generate(tree1, tree2, patches, '', invertible);
return patches;
}
exports.compare = compare;
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