mirror of
https://github.com/cloudflare/wrangler-action.git
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632 lines
24 KiB
JavaScript
632 lines
24 KiB
JavaScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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'use strict';
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import { createScanner } from './scanner';
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var ParseOptions;
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(function (ParseOptions) {
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ParseOptions.DEFAULT = {
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allowTrailingComma: false
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};
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})(ParseOptions || (ParseOptions = {}));
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/**
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* For a given offset, evaluate the location in the JSON document. Each segment in the location path is either a property name or an array index.
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*/
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export function getLocation(text, position) {
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const segments = []; // strings or numbers
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const earlyReturnException = new Object();
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let previousNode = undefined;
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const previousNodeInst = {
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value: {},
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offset: 0,
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length: 0,
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type: 'object',
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parent: undefined
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};
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let isAtPropertyKey = false;
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function setPreviousNode(value, offset, length, type) {
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previousNodeInst.value = value;
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previousNodeInst.offset = offset;
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previousNodeInst.length = length;
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previousNodeInst.type = type;
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previousNodeInst.colonOffset = undefined;
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previousNode = previousNodeInst;
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}
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try {
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visit(text, {
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onObjectBegin: (offset, length) => {
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if (position <= offset) {
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throw earlyReturnException;
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}
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previousNode = undefined;
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isAtPropertyKey = position > offset;
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segments.push(''); // push a placeholder (will be replaced)
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},
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onObjectProperty: (name, offset, length) => {
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if (position < offset) {
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throw earlyReturnException;
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}
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setPreviousNode(name, offset, length, 'property');
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segments[segments.length - 1] = name;
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if (position <= offset + length) {
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throw earlyReturnException;
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}
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},
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onObjectEnd: (offset, length) => {
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if (position <= offset) {
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throw earlyReturnException;
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}
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previousNode = undefined;
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segments.pop();
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},
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onArrayBegin: (offset, length) => {
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if (position <= offset) {
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throw earlyReturnException;
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}
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previousNode = undefined;
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segments.push(0);
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},
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onArrayEnd: (offset, length) => {
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if (position <= offset) {
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throw earlyReturnException;
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}
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previousNode = undefined;
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segments.pop();
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},
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onLiteralValue: (value, offset, length) => {
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if (position < offset) {
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throw earlyReturnException;
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}
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setPreviousNode(value, offset, length, getNodeType(value));
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if (position <= offset + length) {
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throw earlyReturnException;
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}
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},
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onSeparator: (sep, offset, length) => {
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if (position <= offset) {
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throw earlyReturnException;
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}
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if (sep === ':' && previousNode && previousNode.type === 'property') {
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previousNode.colonOffset = offset;
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isAtPropertyKey = false;
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previousNode = undefined;
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}
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else if (sep === ',') {
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const last = segments[segments.length - 1];
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if (typeof last === 'number') {
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segments[segments.length - 1] = last + 1;
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}
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else {
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isAtPropertyKey = true;
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segments[segments.length - 1] = '';
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}
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previousNode = undefined;
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}
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}
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});
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}
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catch (e) {
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if (e !== earlyReturnException) {
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throw e;
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}
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}
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return {
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path: segments,
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previousNode,
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isAtPropertyKey,
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matches: (pattern) => {
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let k = 0;
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for (let i = 0; k < pattern.length && i < segments.length; i++) {
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if (pattern[k] === segments[i] || pattern[k] === '*') {
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k++;
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}
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else if (pattern[k] !== '**') {
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return false;
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}
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}
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return k === pattern.length;
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}
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};
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}
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/**
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* Parses the given text and returns the object the JSON content represents. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
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* Therefore always check the errors list to find out if the input was valid.
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*/
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export function parse(text, errors = [], options = ParseOptions.DEFAULT) {
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let currentProperty = null;
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let currentParent = [];
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const previousParents = [];
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function onValue(value) {
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if (Array.isArray(currentParent)) {
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currentParent.push(value);
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}
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else if (currentProperty !== null) {
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currentParent[currentProperty] = value;
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}
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}
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const visitor = {
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onObjectBegin: () => {
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const object = {};
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onValue(object);
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previousParents.push(currentParent);
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currentParent = object;
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currentProperty = null;
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},
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onObjectProperty: (name) => {
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currentProperty = name;
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},
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onObjectEnd: () => {
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currentParent = previousParents.pop();
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},
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onArrayBegin: () => {
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const array = [];
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onValue(array);
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previousParents.push(currentParent);
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currentParent = array;
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currentProperty = null;
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},
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onArrayEnd: () => {
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currentParent = previousParents.pop();
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},
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onLiteralValue: onValue,
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onError: (error, offset, length) => {
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errors.push({ error, offset, length });
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}
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};
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visit(text, visitor, options);
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return currentParent[0];
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}
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/**
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* Parses the given text and returns a tree representation the JSON content. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
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*/
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export function parseTree(text, errors = [], options = ParseOptions.DEFAULT) {
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let currentParent = { type: 'array', offset: -1, length: -1, children: [], parent: undefined }; // artificial root
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function ensurePropertyComplete(endOffset) {
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if (currentParent.type === 'property') {
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currentParent.length = endOffset - currentParent.offset;
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currentParent = currentParent.parent;
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}
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}
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function onValue(valueNode) {
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currentParent.children.push(valueNode);
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return valueNode;
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}
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const visitor = {
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onObjectBegin: (offset) => {
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currentParent = onValue({ type: 'object', offset, length: -1, parent: currentParent, children: [] });
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},
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onObjectProperty: (name, offset, length) => {
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currentParent = onValue({ type: 'property', offset, length: -1, parent: currentParent, children: [] });
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currentParent.children.push({ type: 'string', value: name, offset, length, parent: currentParent });
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},
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onObjectEnd: (offset, length) => {
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ensurePropertyComplete(offset + length); // in case of a missing value for a property: make sure property is complete
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currentParent.length = offset + length - currentParent.offset;
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currentParent = currentParent.parent;
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ensurePropertyComplete(offset + length);
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},
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onArrayBegin: (offset, length) => {
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currentParent = onValue({ type: 'array', offset, length: -1, parent: currentParent, children: [] });
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},
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onArrayEnd: (offset, length) => {
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currentParent.length = offset + length - currentParent.offset;
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currentParent = currentParent.parent;
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ensurePropertyComplete(offset + length);
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},
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onLiteralValue: (value, offset, length) => {
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onValue({ type: getNodeType(value), offset, length, parent: currentParent, value });
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ensurePropertyComplete(offset + length);
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},
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onSeparator: (sep, offset, length) => {
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if (currentParent.type === 'property') {
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if (sep === ':') {
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currentParent.colonOffset = offset;
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}
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else if (sep === ',') {
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ensurePropertyComplete(offset);
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}
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}
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},
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onError: (error, offset, length) => {
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errors.push({ error, offset, length });
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}
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};
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visit(text, visitor, options);
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const result = currentParent.children[0];
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if (result) {
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delete result.parent;
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}
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return result;
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}
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/**
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* Finds the node at the given path in a JSON DOM.
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*/
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export function findNodeAtLocation(root, path) {
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if (!root) {
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return undefined;
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}
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let node = root;
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for (let segment of path) {
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if (typeof segment === 'string') {
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if (node.type !== 'object' || !Array.isArray(node.children)) {
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return undefined;
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}
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let found = false;
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for (const propertyNode of node.children) {
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if (Array.isArray(propertyNode.children) && propertyNode.children[0].value === segment && propertyNode.children.length === 2) {
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node = propertyNode.children[1];
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found = true;
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break;
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}
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}
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if (!found) {
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return undefined;
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}
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}
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else {
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const index = segment;
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if (node.type !== 'array' || index < 0 || !Array.isArray(node.children) || index >= node.children.length) {
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return undefined;
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}
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node = node.children[index];
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}
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}
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return node;
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}
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/**
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* Gets the JSON path of the given JSON DOM node
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*/
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export function getNodePath(node) {
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if (!node.parent || !node.parent.children) {
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return [];
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}
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const path = getNodePath(node.parent);
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if (node.parent.type === 'property') {
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const key = node.parent.children[0].value;
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path.push(key);
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}
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else if (node.parent.type === 'array') {
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const index = node.parent.children.indexOf(node);
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if (index !== -1) {
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path.push(index);
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}
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}
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return path;
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}
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/**
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* Evaluates the JavaScript object of the given JSON DOM node
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*/
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export function getNodeValue(node) {
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switch (node.type) {
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case 'array':
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return node.children.map(getNodeValue);
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case 'object':
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const obj = Object.create(null);
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for (let prop of node.children) {
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const valueNode = prop.children[1];
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if (valueNode) {
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obj[prop.children[0].value] = getNodeValue(valueNode);
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}
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}
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return obj;
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case 'null':
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case 'string':
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case 'number':
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case 'boolean':
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return node.value;
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default:
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return undefined;
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}
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}
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export function contains(node, offset, includeRightBound = false) {
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return (offset >= node.offset && offset < (node.offset + node.length)) || includeRightBound && (offset === (node.offset + node.length));
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}
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/**
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* Finds the most inner node at the given offset. If includeRightBound is set, also finds nodes that end at the given offset.
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*/
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export function findNodeAtOffset(node, offset, includeRightBound = false) {
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if (contains(node, offset, includeRightBound)) {
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const children = node.children;
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if (Array.isArray(children)) {
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for (let i = 0; i < children.length && children[i].offset <= offset; i++) {
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const item = findNodeAtOffset(children[i], offset, includeRightBound);
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if (item) {
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return item;
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}
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}
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}
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return node;
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}
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return undefined;
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}
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/**
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* Parses the given text and invokes the visitor functions for each object, array and literal reached.
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*/
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export function visit(text, visitor, options = ParseOptions.DEFAULT) {
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const _scanner = createScanner(text, false);
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// Important: Only pass copies of this to visitor functions to prevent accidental modification, and
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// to not affect visitor functions which stored a reference to a previous JSONPath
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const _jsonPath = [];
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function toNoArgVisit(visitFunction) {
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return visitFunction ? () => visitFunction(_scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter()) : () => true;
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}
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function toNoArgVisitWithPath(visitFunction) {
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return visitFunction ? () => visitFunction(_scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter(), () => _jsonPath.slice()) : () => true;
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}
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function toOneArgVisit(visitFunction) {
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return visitFunction ? (arg) => visitFunction(arg, _scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter()) : () => true;
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}
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function toOneArgVisitWithPath(visitFunction) {
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return visitFunction ? (arg) => visitFunction(arg, _scanner.getTokenOffset(), _scanner.getTokenLength(), _scanner.getTokenStartLine(), _scanner.getTokenStartCharacter(), () => _jsonPath.slice()) : () => true;
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}
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const onObjectBegin = toNoArgVisitWithPath(visitor.onObjectBegin), onObjectProperty = toOneArgVisitWithPath(visitor.onObjectProperty), onObjectEnd = toNoArgVisit(visitor.onObjectEnd), onArrayBegin = toNoArgVisitWithPath(visitor.onArrayBegin), onArrayEnd = toNoArgVisit(visitor.onArrayEnd), onLiteralValue = toOneArgVisitWithPath(visitor.onLiteralValue), onSeparator = toOneArgVisit(visitor.onSeparator), onComment = toNoArgVisit(visitor.onComment), onError = toOneArgVisit(visitor.onError);
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const disallowComments = options && options.disallowComments;
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const allowTrailingComma = options && options.allowTrailingComma;
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function scanNext() {
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while (true) {
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const token = _scanner.scan();
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switch (_scanner.getTokenError()) {
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case 4 /* ScanError.InvalidUnicode */:
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handleError(14 /* ParseErrorCode.InvalidUnicode */);
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break;
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case 5 /* ScanError.InvalidEscapeCharacter */:
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handleError(15 /* ParseErrorCode.InvalidEscapeCharacter */);
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break;
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case 3 /* ScanError.UnexpectedEndOfNumber */:
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handleError(13 /* ParseErrorCode.UnexpectedEndOfNumber */);
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break;
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case 1 /* ScanError.UnexpectedEndOfComment */:
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if (!disallowComments) {
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handleError(11 /* ParseErrorCode.UnexpectedEndOfComment */);
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}
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break;
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case 2 /* ScanError.UnexpectedEndOfString */:
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handleError(12 /* ParseErrorCode.UnexpectedEndOfString */);
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break;
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case 6 /* ScanError.InvalidCharacter */:
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handleError(16 /* ParseErrorCode.InvalidCharacter */);
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break;
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}
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switch (token) {
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case 12 /* SyntaxKind.LineCommentTrivia */:
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case 13 /* SyntaxKind.BlockCommentTrivia */:
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if (disallowComments) {
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handleError(10 /* ParseErrorCode.InvalidCommentToken */);
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}
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else {
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onComment();
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}
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break;
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case 16 /* SyntaxKind.Unknown */:
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handleError(1 /* ParseErrorCode.InvalidSymbol */);
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break;
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case 15 /* SyntaxKind.Trivia */:
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case 14 /* SyntaxKind.LineBreakTrivia */:
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break;
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default:
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return token;
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}
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}
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}
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function handleError(error, skipUntilAfter = [], skipUntil = []) {
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onError(error);
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if (skipUntilAfter.length + skipUntil.length > 0) {
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let token = _scanner.getToken();
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while (token !== 17 /* SyntaxKind.EOF */) {
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if (skipUntilAfter.indexOf(token) !== -1) {
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scanNext();
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break;
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}
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else if (skipUntil.indexOf(token) !== -1) {
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break;
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}
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token = scanNext();
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}
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}
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}
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function parseString(isValue) {
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const value = _scanner.getTokenValue();
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if (isValue) {
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onLiteralValue(value);
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}
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else {
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onObjectProperty(value);
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// add property name afterwards
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_jsonPath.push(value);
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}
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scanNext();
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return true;
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}
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function parseLiteral() {
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switch (_scanner.getToken()) {
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case 11 /* SyntaxKind.NumericLiteral */:
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const tokenValue = _scanner.getTokenValue();
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let value = Number(tokenValue);
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if (isNaN(value)) {
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handleError(2 /* ParseErrorCode.InvalidNumberFormat */);
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value = 0;
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}
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onLiteralValue(value);
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break;
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case 7 /* SyntaxKind.NullKeyword */:
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onLiteralValue(null);
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break;
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case 8 /* SyntaxKind.TrueKeyword */:
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onLiteralValue(true);
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break;
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case 9 /* SyntaxKind.FalseKeyword */:
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onLiteralValue(false);
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break;
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default:
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return false;
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}
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scanNext();
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return true;
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}
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function parseProperty() {
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if (_scanner.getToken() !== 10 /* SyntaxKind.StringLiteral */) {
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handleError(3 /* ParseErrorCode.PropertyNameExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
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return false;
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}
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parseString(false);
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if (_scanner.getToken() === 6 /* SyntaxKind.ColonToken */) {
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onSeparator(':');
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scanNext(); // consume colon
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if (!parseValue()) {
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handleError(4 /* ParseErrorCode.ValueExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
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}
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}
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else {
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handleError(5 /* ParseErrorCode.ColonExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
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}
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_jsonPath.pop(); // remove processed property name
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return true;
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}
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function parseObject() {
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onObjectBegin();
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scanNext(); // consume open brace
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let needsComma = false;
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while (_scanner.getToken() !== 2 /* SyntaxKind.CloseBraceToken */ && _scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
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if (_scanner.getToken() === 5 /* SyntaxKind.CommaToken */) {
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if (!needsComma) {
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handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
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}
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onSeparator(',');
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scanNext(); // consume comma
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if (_scanner.getToken() === 2 /* SyntaxKind.CloseBraceToken */ && allowTrailingComma) {
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break;
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}
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}
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else if (needsComma) {
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handleError(6 /* ParseErrorCode.CommaExpected */, [], []);
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}
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if (!parseProperty()) {
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handleError(4 /* ParseErrorCode.ValueExpected */, [], [2 /* SyntaxKind.CloseBraceToken */, 5 /* SyntaxKind.CommaToken */]);
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}
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needsComma = true;
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}
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onObjectEnd();
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if (_scanner.getToken() !== 2 /* SyntaxKind.CloseBraceToken */) {
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handleError(7 /* ParseErrorCode.CloseBraceExpected */, [2 /* SyntaxKind.CloseBraceToken */], []);
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}
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else {
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scanNext(); // consume close brace
|
|
}
|
|
return true;
|
|
}
|
|
function parseArray() {
|
|
onArrayBegin();
|
|
scanNext(); // consume open bracket
|
|
let isFirstElement = true;
|
|
let needsComma = false;
|
|
while (_scanner.getToken() !== 4 /* SyntaxKind.CloseBracketToken */ && _scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
|
|
if (_scanner.getToken() === 5 /* SyntaxKind.CommaToken */) {
|
|
if (!needsComma) {
|
|
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
|
|
}
|
|
onSeparator(',');
|
|
scanNext(); // consume comma
|
|
if (_scanner.getToken() === 4 /* SyntaxKind.CloseBracketToken */ && allowTrailingComma) {
|
|
break;
|
|
}
|
|
}
|
|
else if (needsComma) {
|
|
handleError(6 /* ParseErrorCode.CommaExpected */, [], []);
|
|
}
|
|
if (isFirstElement) {
|
|
_jsonPath.push(0);
|
|
isFirstElement = false;
|
|
}
|
|
else {
|
|
_jsonPath[_jsonPath.length - 1]++;
|
|
}
|
|
if (!parseValue()) {
|
|
handleError(4 /* ParseErrorCode.ValueExpected */, [], [4 /* SyntaxKind.CloseBracketToken */, 5 /* SyntaxKind.CommaToken */]);
|
|
}
|
|
needsComma = true;
|
|
}
|
|
onArrayEnd();
|
|
if (!isFirstElement) {
|
|
_jsonPath.pop(); // remove array index
|
|
}
|
|
if (_scanner.getToken() !== 4 /* SyntaxKind.CloseBracketToken */) {
|
|
handleError(8 /* ParseErrorCode.CloseBracketExpected */, [4 /* SyntaxKind.CloseBracketToken */], []);
|
|
}
|
|
else {
|
|
scanNext(); // consume close bracket
|
|
}
|
|
return true;
|
|
}
|
|
function parseValue() {
|
|
switch (_scanner.getToken()) {
|
|
case 3 /* SyntaxKind.OpenBracketToken */:
|
|
return parseArray();
|
|
case 1 /* SyntaxKind.OpenBraceToken */:
|
|
return parseObject();
|
|
case 10 /* SyntaxKind.StringLiteral */:
|
|
return parseString(true);
|
|
default:
|
|
return parseLiteral();
|
|
}
|
|
}
|
|
scanNext();
|
|
if (_scanner.getToken() === 17 /* SyntaxKind.EOF */) {
|
|
if (options.allowEmptyContent) {
|
|
return true;
|
|
}
|
|
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
|
|
return false;
|
|
}
|
|
if (!parseValue()) {
|
|
handleError(4 /* ParseErrorCode.ValueExpected */, [], []);
|
|
return false;
|
|
}
|
|
if (_scanner.getToken() !== 17 /* SyntaxKind.EOF */) {
|
|
handleError(9 /* ParseErrorCode.EndOfFileExpected */, [], []);
|
|
}
|
|
return true;
|
|
}
|
|
/**
|
|
* Takes JSON with JavaScript-style comments and remove
|
|
* them. Optionally replaces every none-newline character
|
|
* of comments with a replaceCharacter
|
|
*/
|
|
export function stripComments(text, replaceCh) {
|
|
let _scanner = createScanner(text), parts = [], kind, offset = 0, pos;
|
|
do {
|
|
pos = _scanner.getPosition();
|
|
kind = _scanner.scan();
|
|
switch (kind) {
|
|
case 12 /* SyntaxKind.LineCommentTrivia */:
|
|
case 13 /* SyntaxKind.BlockCommentTrivia */:
|
|
case 17 /* SyntaxKind.EOF */:
|
|
if (offset !== pos) {
|
|
parts.push(text.substring(offset, pos));
|
|
}
|
|
if (replaceCh !== undefined) {
|
|
parts.push(_scanner.getTokenValue().replace(/[^\r\n]/g, replaceCh));
|
|
}
|
|
offset = _scanner.getPosition();
|
|
break;
|
|
}
|
|
} while (kind !== 17 /* SyntaxKind.EOF */);
|
|
return parts.join('');
|
|
}
|
|
export function getNodeType(value) {
|
|
switch (typeof value) {
|
|
case 'boolean': return 'boolean';
|
|
case 'number': return 'number';
|
|
case 'string': return 'string';
|
|
case 'object': {
|
|
if (!value) {
|
|
return 'null';
|
|
}
|
|
else if (Array.isArray(value)) {
|
|
return 'array';
|
|
}
|
|
return 'object';
|
|
}
|
|
default: return 'null';
|
|
}
|
|
}
|