/*!
* Copyright (c) Squirrel Chat et al., All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
let BARE_KEY = /^[a-z0-9-_]+$/i;
function extendedTypeOf(obj) {
let type = typeof obj;
if (type === 'object') {
if (Array.isArray(obj))
return 'array';
if (obj instanceof Date)
return 'date';
}
return type;
}
function isArrayOfTables(obj) {
for (let i = 0; i < obj.length; i++) {
if (extendedTypeOf(obj[i]) !== 'object')
return false;
}
return obj.length != 0;
}
function formatString(s) {
return JSON.stringify(s).replace(/\x7f/g, '\\u007f');
}
function stringifyValue(val, type, depth, numberAsFloat) {
if (depth === 0) {
throw new Error('Could not stringify the object: maximum object depth exceeded');
}
if (type === 'number') {
if (isNaN(val))
return 'nan';
if (val === Infinity)
return 'inf';
if (val === -Infinity)
return '-inf';
if (Number.isInteger(val) && (numberAsFloat || !Number.isSafeInteger(val)))
return val.toFixed(1);
return val.toString();
}
if (type === 'bigint' || type === 'boolean') {
return val.toString();
}
if (type === 'string') {
return formatString(val);
}
if (type === 'date') {
if (isNaN(val.getTime())) {
throw new TypeError('cannot serialize invalid date');
}
return val.toISOString();
}
if (type === 'object') {
return stringifyInlineTable(val, depth, numberAsFloat);
}
if (type === 'array') {
return stringifyArray(val, depth, numberAsFloat);
}
}
function stringifyInlineTable(obj, depth, numberAsFloat) {
let keys = Object.keys(obj);
if (keys.length === 0)
return '{}';
let res = '{ ';
for (let i = 0; i < keys.length; i++) {
let k = keys[i];
if (i)
res += ', ';
res += BARE_KEY.test(k) ? k : formatString(k);
res += ' = ';
res += stringifyValue(obj[k], extendedTypeOf(obj[k]), depth - 1, numberAsFloat);
}
return res + ' }';
}
function stringifyArray(array, depth, numberAsFloat) {
if (array.length === 0)
return '[]';
let res = '[ ';
for (let i = 0; i < array.length; i++) {
if (i)
res += ', ';
if (array[i] === null || array[i] === void 0) {
throw new TypeError('arrays cannot contain null or undefined values');
}
res += stringifyValue(array[i], extendedTypeOf(array[i]), depth - 1, numberAsFloat);
}
return res + ' ]';
}
function stringifyArrayTable(array, key, depth, numberAsFloat) {
if (depth === 0) {
throw new Error('Could not stringify the object: maximum object depth exceeded');
}
let res = '';
for (let i = 0; i < array.length; i++) {
res += `${res && '\n'}[[${key}]]\n`;
res += stringifyTable(0, array[i], key, depth, numberAsFloat);
}
return res;
}
function stringifyTable(tableKey, obj, prefix, depth, numberAsFloat) {
if (depth === 0) {
throw new Error('Could not stringify the object: maximum object depth exceeded');
}
let preamble = '';
let tables = '';
let keys = Object.keys(obj);
for (let i = 0; i < keys.length; i++) {
let k = keys[i];
if (obj[k] !== null && obj[k] !== void 0) {
let type = extendedTypeOf(obj[k]);
if (type === 'symbol' || type === 'function') {
throw new TypeError(`cannot serialize values of type '${type}'`);
}
let key = BARE_KEY.test(k) ? k : formatString(k);
if (type === 'array' && isArrayOfTables(obj[k])) {
tables += (tables && '\n') + stringifyArrayTable(obj[k], prefix ? `${prefix}.${key}` : key, depth - 1, numberAsFloat);
}
else if (type === 'object') {
let tblKey = prefix ? `${prefix}.${key}` : key;
tables += (tables && '\n') + stringifyTable(tblKey, obj[k], tblKey, depth - 1, numberAsFloat);
}
else {
preamble += key;
preamble += ' = ';
preamble += stringifyValue(obj[k], type, depth, numberAsFloat);
preamble += '\n';
}
}
}
if (tableKey && (preamble || !tables)) // Create table only if necessary
preamble = preamble ? `[${tableKey}]\n${preamble}` : `[${tableKey}]`;
return preamble && tables
? `${preamble}\n${tables}`
: preamble || tables;
}
export function stringify(obj, { maxDepth = 1000, numbersAsFloat = false } = {}) {
if (extendedTypeOf(obj) !== 'object') {
throw new TypeError('stringify can only be called with an object');
}
let str = stringifyTable(0, obj, '', maxDepth, numbersAsFloat);
if (str[str.length - 1] !== '\n')
return str + '\n';
return str;
}
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