ag-charts-community
Version:
Advanced Charting / Charts supporting Javascript / Typescript / React / Angular / Vue
255 lines • 9.53 kB
JavaScript
;
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spread = (this && this.__spread) || function () {
for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
return ar;
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Performs a JSON-diff between a source and target JSON structure.
*
* On a per property basis, takes the target property value where:
* - types are different.
* - type is primitive.
* - type is array and length or content have changed.
*
* Recurses for object types.
*
* @param source starting point for diff
* @param target target for diff vs. source
*
* @returns `null` if no differences, or an object with the subset of properties that have changed.
*/
function jsonDiff(source, target) {
var e_1, _a;
var lhs = source || {};
var rhs = target || {};
var allProps = new Set(__spread(Object.keys(lhs), Object.keys(rhs)));
var propsChangedCount = 0;
var result = {};
var _loop_1 = function (prop) {
// Cheap-and-easy equality check.
if (lhs[prop] === rhs[prop]) {
return "continue";
}
var take = function (v) {
result[prop] = v;
propsChangedCount++;
};
var lhsType = classify(lhs[prop]);
var rhsType = classify(rhs[prop]);
if (lhsType !== rhsType) {
// Types changed, just take RHS.
take(rhs[prop]);
return "continue";
}
if (rhsType === 'primitive' || rhsType === null) {
take(rhs[prop]);
return "continue";
}
if (rhsType === 'array' && lhs[prop].length !== rhs[prop].length) {
// Arrays are different sizes, so just take target array.
take(rhs[prop]);
return "continue";
}
if (JSON.stringify(lhs[prop]) === JSON.stringify(rhs[prop])) {
return "continue";
}
if (rhsType === 'array') {
// Don't try to do anything tricky with array diffs!
take(rhs[prop]);
return "continue";
}
var diff = jsonDiff(lhs[prop], rhs[prop]);
if (diff !== null) {
take(diff);
}
};
try {
for (var allProps_1 = __values(allProps), allProps_1_1 = allProps_1.next(); !allProps_1_1.done; allProps_1_1 = allProps_1.next()) {
var prop = allProps_1_1.value;
_loop_1(prop);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (allProps_1_1 && !allProps_1_1.done && (_a = allProps_1.return)) _a.call(allProps_1);
}
finally { if (e_1) throw e_1.error; }
}
return propsChangedCount === 0 ? null : result;
}
exports.jsonDiff = jsonDiff;
/**
* Special value used by `jsonMerge` to signal that a property should be removed from the merged
* output.
*/
exports.DELETE = Symbol('<delete-property>');
/**
* Merge together the provide JSON object structures, with the precedence of application running
* from higher indexes to lower indexes.
*
* Deep-clones all objects to avoid mutation of the inputs changing the output object. For arrays,
* just performs a deep-clone of the entire array, no merging of elements attempted.
*
* @param json all json objects to merge
*
* @returns the combination of all of the json inputs
*/
function jsonMerge() {
var e_2, _a;
var json = [];
for (var _i = 0; _i < arguments.length; _i++) {
json[_i] = arguments[_i];
}
if (json.some(function (v) { return v instanceof Array; })) {
throw new Error("AG Charts - merge of arrays not supported: " + JSON.stringify(json));
}
var result = deepClone(json[0]);
try {
for (var _b = __values(json.slice(1)), _c = _b.next(); !_c.done; _c = _b.next()) {
var nextJson = _c.value;
for (var nextProp in nextJson) {
if (nextJson[nextProp] === exports.DELETE) {
delete result[nextProp];
}
else if (result[nextProp] instanceof Array) {
// Overwrite array properties that already exist.
result[nextProp] = deepClone(nextJson[nextProp]);
}
else if (typeof result[nextProp] === 'object') {
// Recursively merge complex objects.
result[nextProp] = jsonMerge(result[nextProp], nextJson[nextProp]);
}
else if (typeof nextJson[nextProp] === 'object') {
// Deep clone of nested objects.
result[nextProp] = deepClone(nextJson[nextProp]);
}
else {
// Just directly assign/overwrite.
result[nextProp] = nextJson[nextProp];
}
}
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_2) throw e_2.error; }
}
return result;
}
exports.jsonMerge = jsonMerge;
/**
* Recursively apply a JSON object into a class-hierarchy, optionally instantiating certain classes
* by property name.
*
* @param target to apply source JSON properties into
* @param source to be applied
* @param params.path path for logging/error purposes, to aid with pinpointing problems
* @param params.skip property names to skip from the source
* @param params.constructors dictionary of property name to class constructors for properties that
* require object construction
*/
function jsonApply(target, source, params) {
if (params === void 0) { params = {}; }
var _a;
var _b = params.path, path = _b === void 0 ? undefined : _b, _c = params.skip, skip = _c === void 0 ? [] : _c, _d = params.constructors, constructors = _d === void 0 ? {} : _d;
if (target == null) {
throw new Error("AG Charts - target is uninitialised: " + (path || '<root>'));
}
if (source == null) {
return target;
}
for (var property in source) {
if (skip.indexOf(property) >= 0) {
continue;
}
var newValue = source[property];
var propertyPath = "" + (path ? path + '.' : '') + property;
var targetAny = target;
var currentValue = targetAny[property];
var ctr = constructors[property];
try {
var targetClass = (_a = targetAny.constructor) === null || _a === void 0 ? void 0 : _a.name;
var currentValueType = classify(currentValue);
var newValueType = classify(newValue);
if (targetClass != null && targetClass !== 'Object' && !(property in target || targetAny.hasOwnProperty(property))) {
throw new Error("Property doesn't exist in target type: " + targetClass);
}
if (currentValueType != null && newValueType != null && currentValueType !== newValueType) {
throw new Error("Property types don't match, can't apply: currentValueType=" + currentValueType + ", newValueType=" + newValueType);
}
if (newValueType === 'array' || currentValue instanceof HTMLElement) {
targetAny[property] = newValue;
}
else if (newValueType === 'object') {
if (currentValue != null) {
jsonApply(currentValue, newValue, { path: propertyPath, skip: skip, constructors: constructors });
}
else if (ctr != null) {
targetAny[property] = jsonApply(new ctr(), newValue, { path: propertyPath, skip: skip, constructors: constructors });
}
else {
targetAny[property] = newValue;
}
}
else {
targetAny[property] = newValue;
}
}
catch (error) {
throw new Error("AG Charts - unable to set: " + propertyPath + "; nested error is: " + error.message);
}
}
return target;
}
exports.jsonApply = jsonApply;
function deepClone(input) {
return JSON.parse(JSON.stringify(input));
}
/**
* Classify the type of a value to assist with handling for merge purposes.
*/
function classify(value) {
if (value instanceof Array) {
return 'array';
}
else if (typeof value === 'object') {
return 'object';
}
else if (value != null) {
return 'primitive';
}
return null;
}
//# sourceMappingURL=json.js.map