735 lines
21 KiB
JavaScript
735 lines
21 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var vm = require('vm');
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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var vm__default = /*#__PURE__*/_interopDefaultLegacy(vm);
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const {
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hasOwnProperty: hasOwnProp
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} = Object.prototype;
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/**
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* @typedef {null|boolean|number|string|PlainObject|GenericArray} JSONObject
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*/
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/**
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* Copies array and then pushes item into it.
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* @param {GenericArray} arr Array to copy and into which to push
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* @param {any} item Array item to add (to end)
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* @returns {GenericArray} Copy of the original array
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*/
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function push(arr, item) {
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arr = arr.slice();
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arr.push(item);
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return arr;
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}
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/**
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* Copies array and then unshifts item into it.
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* @param {any} item Array item to add (to beginning)
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* @param {GenericArray} arr Array to copy and into which to unshift
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* @returns {GenericArray} Copy of the original array
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*/
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function unshift(item, arr) {
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arr = arr.slice();
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arr.unshift(item);
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return arr;
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}
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/**
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* Caught when JSONPath is used without `new` but rethrown if with `new`
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* @extends Error
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*/
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class NewError extends Error {
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/**
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* @param {any} value The evaluated scalar value
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*/
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constructor(value) {
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super('JSONPath should not be called with "new" (it prevents return ' + 'of (unwrapped) scalar values)');
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this.avoidNew = true;
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this.value = value;
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this.name = 'NewError';
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}
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}
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/**
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* @typedef {PlainObject} ReturnObject
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* @property {string} path
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* @property {JSONObject} value
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* @property {PlainObject|GenericArray} parent
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* @property {string} parentProperty
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*/
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/**
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* @callback JSONPathCallback
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* @param {string|PlainObject} preferredOutput
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* @param {"value"|"property"} type
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* @param {ReturnObject} fullRetObj
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* @returns {void}
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*/
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/**
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* @callback OtherTypeCallback
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* @param {JSONObject} val
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* @param {string} path
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* @param {PlainObject|GenericArray} parent
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* @param {string} parentPropName
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* @returns {boolean}
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*/
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/* eslint-disable max-len -- Can make multiline type after https://github.com/syavorsky/comment-parser/issues/109 */
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/**
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* @typedef {PlainObject} JSONPathOptions
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* @property {JSON} json
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* @property {string|string[]} path
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* @property {"value"|"path"|"pointer"|"parent"|"parentProperty"|"all"} [resultType="value"]
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* @property {boolean} [flatten=false]
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* @property {boolean} [wrap=true]
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* @property {PlainObject} [sandbox={}]
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* @property {boolean} [preventEval=false]
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* @property {PlainObject|GenericArray|null} [parent=null]
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* @property {string|null} [parentProperty=null]
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* @property {JSONPathCallback} [callback]
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* @property {OtherTypeCallback} [otherTypeCallback] Defaults to
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* function which throws on encountering `@other`
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* @property {boolean} [autostart=true]
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*/
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/* eslint-enable max-len -- Can make multiline type after https://github.com/syavorsky/comment-parser/issues/109 */
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/**
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* @param {string|JSONPathOptions} opts If a string, will be treated as `expr`
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* @param {string} [expr] JSON path to evaluate
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* @param {JSON} [obj] JSON object to evaluate against
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* @param {JSONPathCallback} [callback] Passed 3 arguments: 1) desired payload
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* per `resultType`, 2) `"value"|"property"`, 3) Full returned object with
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* all payloads
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* @param {OtherTypeCallback} [otherTypeCallback] If `@other()` is at the end
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* of one's query, this will be invoked with the value of the item, its
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* path, its parent, and its parent's property name, and it should return
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* a boolean indicating whether the supplied value belongs to the "other"
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* type or not (or it may handle transformations and return `false`).
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* @returns {JSONPath}
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* @class
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*/
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function JSONPath(opts, expr, obj, callback, otherTypeCallback) {
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// eslint-disable-next-line no-restricted-syntax
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if (!(this instanceof JSONPath)) {
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try {
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return new JSONPath(opts, expr, obj, callback, otherTypeCallback);
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} catch (e) {
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if (!e.avoidNew) {
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throw e;
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}
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return e.value;
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}
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}
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if (typeof opts === 'string') {
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otherTypeCallback = callback;
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callback = obj;
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obj = expr;
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expr = opts;
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opts = null;
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}
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const optObj = opts && typeof opts === 'object';
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opts = opts || {};
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this.json = opts.json || obj;
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this.path = opts.path || expr;
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this.resultType = opts.resultType || 'value';
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this.flatten = opts.flatten || false;
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this.wrap = hasOwnProp.call(opts, 'wrap') ? opts.wrap : true;
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this.sandbox = opts.sandbox || {};
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this.preventEval = opts.preventEval || false;
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this.parent = opts.parent || null;
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this.parentProperty = opts.parentProperty || null;
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this.callback = opts.callback || callback || null;
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this.otherTypeCallback = opts.otherTypeCallback || otherTypeCallback || function () {
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throw new TypeError('You must supply an otherTypeCallback callback option ' + 'with the @other() operator.');
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};
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if (opts.autostart !== false) {
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const args = {
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path: optObj ? opts.path : expr
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};
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if (!optObj) {
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args.json = obj;
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} else if ('json' in opts) {
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args.json = opts.json;
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}
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const ret = this.evaluate(args);
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if (!ret || typeof ret !== 'object') {
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throw new NewError(ret);
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}
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return ret;
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}
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} // PUBLIC METHODS
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JSONPath.prototype.evaluate = function (expr, json, callback, otherTypeCallback) {
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let currParent = this.parent,
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currParentProperty = this.parentProperty;
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let {
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flatten,
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wrap
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} = this;
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this.currResultType = this.resultType;
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this.currPreventEval = this.preventEval;
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this.currSandbox = this.sandbox;
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callback = callback || this.callback;
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this.currOtherTypeCallback = otherTypeCallback || this.otherTypeCallback;
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json = json || this.json;
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expr = expr || this.path;
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if (expr && typeof expr === 'object' && !Array.isArray(expr)) {
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if (!expr.path && expr.path !== '') {
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throw new TypeError('You must supply a "path" property when providing an object ' + 'argument to JSONPath.evaluate().');
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}
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if (!hasOwnProp.call(expr, 'json')) {
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throw new TypeError('You must supply a "json" property when providing an object ' + 'argument to JSONPath.evaluate().');
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}
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({
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json
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} = expr);
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flatten = hasOwnProp.call(expr, 'flatten') ? expr.flatten : flatten;
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this.currResultType = hasOwnProp.call(expr, 'resultType') ? expr.resultType : this.currResultType;
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this.currSandbox = hasOwnProp.call(expr, 'sandbox') ? expr.sandbox : this.currSandbox;
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wrap = hasOwnProp.call(expr, 'wrap') ? expr.wrap : wrap;
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this.currPreventEval = hasOwnProp.call(expr, 'preventEval') ? expr.preventEval : this.currPreventEval;
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callback = hasOwnProp.call(expr, 'callback') ? expr.callback : callback;
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this.currOtherTypeCallback = hasOwnProp.call(expr, 'otherTypeCallback') ? expr.otherTypeCallback : this.currOtherTypeCallback;
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currParent = hasOwnProp.call(expr, 'parent') ? expr.parent : currParent;
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currParentProperty = hasOwnProp.call(expr, 'parentProperty') ? expr.parentProperty : currParentProperty;
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expr = expr.path;
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}
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currParent = currParent || null;
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currParentProperty = currParentProperty || null;
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if (Array.isArray(expr)) {
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expr = JSONPath.toPathString(expr);
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}
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if (!expr && expr !== '' || !json) {
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return undefined;
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}
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const exprList = JSONPath.toPathArray(expr);
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if (exprList[0] === '$' && exprList.length > 1) {
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exprList.shift();
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}
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this._hasParentSelector = null;
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const result = this._trace(exprList, json, ['$'], currParent, currParentProperty, callback).filter(function (ea) {
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return ea && !ea.isParentSelector;
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});
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if (!result.length) {
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return wrap ? [] : undefined;
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}
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if (!wrap && result.length === 1 && !result[0].hasArrExpr) {
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return this._getPreferredOutput(result[0]);
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}
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return result.reduce((rslt, ea) => {
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const valOrPath = this._getPreferredOutput(ea);
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if (flatten && Array.isArray(valOrPath)) {
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rslt = rslt.concat(valOrPath);
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} else {
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rslt.push(valOrPath);
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}
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return rslt;
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}, []);
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}; // PRIVATE METHODS
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JSONPath.prototype._getPreferredOutput = function (ea) {
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const resultType = this.currResultType;
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switch (resultType) {
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case 'all':
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{
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const path = Array.isArray(ea.path) ? ea.path : JSONPath.toPathArray(ea.path);
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ea.pointer = JSONPath.toPointer(path);
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ea.path = typeof ea.path === 'string' ? ea.path : JSONPath.toPathString(ea.path);
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return ea;
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}
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case 'value':
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case 'parent':
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case 'parentProperty':
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return ea[resultType];
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case 'path':
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return JSONPath.toPathString(ea[resultType]);
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case 'pointer':
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return JSONPath.toPointer(ea.path);
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default:
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throw new TypeError('Unknown result type');
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}
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};
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JSONPath.prototype._handleCallback = function (fullRetObj, callback, type) {
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if (callback) {
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const preferredOutput = this._getPreferredOutput(fullRetObj);
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fullRetObj.path = typeof fullRetObj.path === 'string' ? fullRetObj.path : JSONPath.toPathString(fullRetObj.path); // eslint-disable-next-line node/callback-return
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callback(preferredOutput, type, fullRetObj);
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}
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};
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/**
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*
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* @param {string} expr
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* @param {JSONObject} val
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* @param {string} path
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* @param {PlainObject|GenericArray} parent
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* @param {string} parentPropName
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* @param {JSONPathCallback} callback
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* @param {boolean} hasArrExpr
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* @param {boolean} literalPriority
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* @returns {ReturnObject|ReturnObject[]}
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*/
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JSONPath.prototype._trace = function (expr, val, path, parent, parentPropName, callback, hasArrExpr, literalPriority) {
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// No expr to follow? return path and value as the result of
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// this trace branch
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let retObj;
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if (!expr.length) {
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retObj = {
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path,
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value: val,
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parent,
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parentProperty: parentPropName,
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hasArrExpr
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};
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this._handleCallback(retObj, callback, 'value');
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return retObj;
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}
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const loc = expr[0],
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x = expr.slice(1); // We need to gather the return value of recursive trace calls in order to
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// do the parent sel computation.
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const ret = [];
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/**
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*
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* @param {ReturnObject|ReturnObject[]} elems
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* @returns {void}
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*/
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function addRet(elems) {
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if (Array.isArray(elems)) {
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// This was causing excessive stack size in Node (with or
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// without Babel) against our performance test:
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// `ret.push(...elems);`
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elems.forEach(t => {
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ret.push(t);
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});
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} else {
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ret.push(elems);
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}
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}
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if ((typeof loc !== 'string' || literalPriority) && val && hasOwnProp.call(val, loc)) {
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// simple case--directly follow property
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addRet(this._trace(x, val[loc], push(path, loc), val, loc, callback, hasArrExpr));
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} else if (loc === '*') {
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// all child properties
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this._walk(loc, x, val, path, parent, parentPropName, callback, (m, l, _x, v, p, par, pr, cb) => {
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addRet(this._trace(unshift(m, _x), v, p, par, pr, cb, true, true));
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});
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} else if (loc === '..') {
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// all descendent parent properties
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// Check remaining expression with val's immediate children
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addRet(this._trace(x, val, path, parent, parentPropName, callback, hasArrExpr));
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this._walk(loc, x, val, path, parent, parentPropName, callback, (m, l, _x, v, p, par, pr, cb) => {
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// We don't join m and x here because we only want parents,
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// not scalar values
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if (typeof v[m] === 'object') {
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// Keep going with recursive descent on val's
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// object children
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addRet(this._trace(unshift(l, _x), v[m], push(p, m), v, m, cb, true));
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}
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}); // The parent sel computation is handled in the frame above using the
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// ancestor object of val
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} else if (loc === '^') {
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// This is not a final endpoint, so we do not invoke the callback here
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this._hasParentSelector = true;
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return {
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path: path.slice(0, -1),
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expr: x,
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isParentSelector: true
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};
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} else if (loc === '~') {
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// property name
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retObj = {
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path: push(path, loc),
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value: parentPropName,
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parent,
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parentProperty: null
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};
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this._handleCallback(retObj, callback, 'property');
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return retObj;
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} else if (loc === '$') {
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// root only
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addRet(this._trace(x, val, path, null, null, callback, hasArrExpr));
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} else if (/^(-?\d*):(-?\d*):?(\d*)$/u.test(loc)) {
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// [start:end:step] Python slice syntax
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addRet(this._slice(loc, x, val, path, parent, parentPropName, callback));
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} else if (loc.indexOf('?(') === 0) {
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// [?(expr)] (filtering)
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if (this.currPreventEval) {
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throw new Error('Eval [?(expr)] prevented in JSONPath expression.');
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}
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this._walk(loc, x, val, path, parent, parentPropName, callback, (m, l, _x, v, p, par, pr, cb) => {
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if (this._eval(l.replace(/^\?\((.*?)\)$/u, '$1'), v[m], m, p, par, pr)) {
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addRet(this._trace(unshift(m, _x), v, p, par, pr, cb, true));
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}
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});
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} else if (loc[0] === '(') {
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// [(expr)] (dynamic property/index)
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if (this.currPreventEval) {
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throw new Error('Eval [(expr)] prevented in JSONPath expression.');
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} // As this will resolve to a property name (but we don't know it
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// yet), property and parent information is relative to the
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// parent of the property to which this expression will resolve
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addRet(this._trace(unshift(this._eval(loc, val, path[path.length - 1], path.slice(0, -1), parent, parentPropName), x), val, path, parent, parentPropName, callback, hasArrExpr));
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} else if (loc[0] === '@') {
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// value type: @boolean(), etc.
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let addType = false;
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const valueType = loc.slice(1, -2);
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switch (valueType) {
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case 'scalar':
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if (!val || !['object', 'function'].includes(typeof val)) {
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addType = true;
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}
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break;
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case 'boolean':
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case 'string':
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case 'undefined':
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case 'function':
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// eslint-disable-next-line valid-typeof
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if (typeof val === valueType) {
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addType = true;
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}
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break;
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case 'integer':
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if (Number.isFinite(val) && !(val % 1)) {
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addType = true;
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}
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break;
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case 'number':
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if (Number.isFinite(val)) {
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addType = true;
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}
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break;
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case 'nonFinite':
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if (typeof val === 'number' && !Number.isFinite(val)) {
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addType = true;
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}
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break;
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case 'object':
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// eslint-disable-next-line valid-typeof
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if (val && typeof val === valueType) {
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addType = true;
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}
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break;
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case 'array':
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if (Array.isArray(val)) {
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addType = true;
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}
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break;
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case 'other':
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addType = this.currOtherTypeCallback(val, path, parent, parentPropName);
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break;
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case 'null':
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if (val === null) {
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addType = true;
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}
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break;
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/* istanbul ignore next */
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default:
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throw new TypeError('Unknown value type ' + valueType);
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}
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if (addType) {
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retObj = {
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path,
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value: val,
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parent,
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parentProperty: parentPropName
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};
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this._handleCallback(retObj, callback, 'value');
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return retObj;
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} // `-escaped property
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} else if (loc[0] === '`' && val && hasOwnProp.call(val, loc.slice(1))) {
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const locProp = loc.slice(1);
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addRet(this._trace(x, val[locProp], push(path, locProp), val, locProp, callback, hasArrExpr, true));
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} else if (loc.includes(',')) {
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// [name1,name2,...]
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const parts = loc.split(',');
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for (const part of parts) {
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addRet(this._trace(unshift(part, x), val, path, parent, parentPropName, callback, true));
|
|
} // simple case--directly follow property
|
|
|
|
} else if (!literalPriority && val && hasOwnProp.call(val, loc)) {
|
|
addRet(this._trace(x, val[loc], push(path, loc), val, loc, callback, hasArrExpr, true));
|
|
} // We check the resulting values for parent selections. For parent
|
|
// selections we discard the value object and continue the trace with the
|
|
// current val object
|
|
|
|
|
|
if (this._hasParentSelector) {
|
|
for (let t = 0; t < ret.length; t++) {
|
|
const rett = ret[t];
|
|
|
|
if (rett && rett.isParentSelector) {
|
|
const tmp = this._trace(rett.expr, val, rett.path, parent, parentPropName, callback, hasArrExpr);
|
|
|
|
if (Array.isArray(tmp)) {
|
|
ret[t] = tmp[0];
|
|
const tl = tmp.length;
|
|
|
|
for (let tt = 1; tt < tl; tt++) {
|
|
t++;
|
|
ret.splice(t, 0, tmp[tt]);
|
|
}
|
|
} else {
|
|
ret[t] = tmp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
JSONPath.prototype._walk = function (loc, expr, val, path, parent, parentPropName, callback, f) {
|
|
if (Array.isArray(val)) {
|
|
const n = val.length;
|
|
|
|
for (let i = 0; i < n; i++) {
|
|
f(i, loc, expr, val, path, parent, parentPropName, callback);
|
|
}
|
|
} else if (val && typeof val === 'object') {
|
|
Object.keys(val).forEach(m => {
|
|
f(m, loc, expr, val, path, parent, parentPropName, callback);
|
|
});
|
|
}
|
|
};
|
|
|
|
JSONPath.prototype._slice = function (loc, expr, val, path, parent, parentPropName, callback) {
|
|
if (!Array.isArray(val)) {
|
|
return undefined;
|
|
}
|
|
|
|
const len = val.length,
|
|
parts = loc.split(':'),
|
|
step = parts[2] && Number.parseInt(parts[2]) || 1;
|
|
let start = parts[0] && Number.parseInt(parts[0]) || 0,
|
|
end = parts[1] && Number.parseInt(parts[1]) || len;
|
|
start = start < 0 ? Math.max(0, start + len) : Math.min(len, start);
|
|
end = end < 0 ? Math.max(0, end + len) : Math.min(len, end);
|
|
const ret = [];
|
|
|
|
for (let i = start; i < end; i += step) {
|
|
const tmp = this._trace(unshift(i, expr), val, path, parent, parentPropName, callback, true); // Should only be possible to be an array here since first part of
|
|
// ``unshift(i, expr)` passed in above would not be empty, nor `~`,
|
|
// nor begin with `@` (as could return objects)
|
|
// This was causing excessive stack size in Node (with or
|
|
// without Babel) against our performance test: `ret.push(...tmp);`
|
|
|
|
|
|
tmp.forEach(t => {
|
|
ret.push(t);
|
|
});
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
JSONPath.prototype._eval = function (code, _v, _vname, path, parent, parentPropName) {
|
|
if (code.includes('@parentProperty')) {
|
|
this.currSandbox._$_parentProperty = parentPropName;
|
|
code = code.replace(/@parentProperty/gu, '_$_parentProperty');
|
|
}
|
|
|
|
if (code.includes('@parent')) {
|
|
this.currSandbox._$_parent = parent;
|
|
code = code.replace(/@parent/gu, '_$_parent');
|
|
}
|
|
|
|
if (code.includes('@property')) {
|
|
this.currSandbox._$_property = _vname;
|
|
code = code.replace(/@property/gu, '_$_property');
|
|
}
|
|
|
|
if (code.includes('@path')) {
|
|
this.currSandbox._$_path = JSONPath.toPathString(path.concat([_vname]));
|
|
code = code.replace(/@path/gu, '_$_path');
|
|
}
|
|
|
|
if (code.includes('@root')) {
|
|
this.currSandbox._$_root = this.json;
|
|
code = code.replace(/@root/gu, '_$_root');
|
|
}
|
|
|
|
if (/@([.\s)[])/u.test(code)) {
|
|
this.currSandbox._$_v = _v;
|
|
code = code.replace(/@([.\s)[])/gu, '_$_v$1');
|
|
}
|
|
|
|
try {
|
|
return this.vm.runInNewContext(code, this.currSandbox);
|
|
} catch (e) {
|
|
// eslint-disable-next-line no-console
|
|
console.log(e);
|
|
throw new Error('jsonPath: ' + e.message + ': ' + code);
|
|
}
|
|
}; // PUBLIC CLASS PROPERTIES AND METHODS
|
|
// Could store the cache object itself
|
|
|
|
|
|
JSONPath.cache = {};
|
|
/**
|
|
* @param {string[]} pathArr Array to convert
|
|
* @returns {string} The path string
|
|
*/
|
|
|
|
JSONPath.toPathString = function (pathArr) {
|
|
const x = pathArr,
|
|
n = x.length;
|
|
let p = '$';
|
|
|
|
for (let i = 1; i < n; i++) {
|
|
if (!/^(~|\^|@.*?\(\))$/u.test(x[i])) {
|
|
p += /^[0-9*]+$/u.test(x[i]) ? '[' + x[i] + ']' : "['" + x[i] + "']";
|
|
}
|
|
}
|
|
|
|
return p;
|
|
};
|
|
/**
|
|
* @param {string} pointer JSON Path
|
|
* @returns {string} JSON Pointer
|
|
*/
|
|
|
|
|
|
JSONPath.toPointer = function (pointer) {
|
|
const x = pointer,
|
|
n = x.length;
|
|
let p = '';
|
|
|
|
for (let i = 1; i < n; i++) {
|
|
if (!/^(~|\^|@.*?\(\))$/u.test(x[i])) {
|
|
p += '/' + x[i].toString().replace(/~/gu, '~0').replace(/\//gu, '~1');
|
|
}
|
|
}
|
|
|
|
return p;
|
|
};
|
|
/**
|
|
* @param {string} expr Expression to convert
|
|
* @returns {string[]}
|
|
*/
|
|
|
|
|
|
JSONPath.toPathArray = function (expr) {
|
|
const {
|
|
cache
|
|
} = JSONPath;
|
|
|
|
if (cache[expr]) {
|
|
return cache[expr].concat();
|
|
}
|
|
|
|
const subx = [];
|
|
const normalized = expr // Properties
|
|
.replace(/@(?:null|boolean|number|string|integer|undefined|nonFinite|scalar|array|object|function|other)\(\)/gu, ';$&;') // Parenthetical evaluations (filtering and otherwise), directly
|
|
// within brackets or single quotes
|
|
.replace(/[['](\??\(.*?\))[\]']/gu, function ($0, $1) {
|
|
return '[#' + (subx.push($1) - 1) + ']';
|
|
}) // Escape periods and tildes within properties
|
|
.replace(/\['([^'\]]*)'\]/gu, function ($0, prop) {
|
|
return "['" + prop.replace(/\./gu, '%@%').replace(/~/gu, '%%@@%%') + "']";
|
|
}) // Properties operator
|
|
.replace(/~/gu, ';~;') // Split by property boundaries
|
|
.replace(/'?\.'?(?![^[]*\])|\['?/gu, ';') // Reinsert periods within properties
|
|
.replace(/%@%/gu, '.') // Reinsert tildes within properties
|
|
.replace(/%%@@%%/gu, '~') // Parent
|
|
.replace(/(?:;)?(\^+)(?:;)?/gu, function ($0, ups) {
|
|
return ';' + ups.split('').join(';') + ';';
|
|
}) // Descendents
|
|
.replace(/;;;|;;/gu, ';..;') // Remove trailing
|
|
.replace(/;$|'?\]|'$/gu, '');
|
|
const exprList = normalized.split(';').map(function (exp) {
|
|
const match = exp.match(/#(\d+)/u);
|
|
return !match || !match[1] ? exp : subx[match[1]];
|
|
});
|
|
cache[expr] = exprList;
|
|
return cache[expr].concat();
|
|
};
|
|
|
|
JSONPath.prototype.vm = vm__default['default'];
|
|
|
|
exports.JSONPath = JSONPath;
|