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'use strict';

Object.defineProperty(exports, 'commentRegex', {

get: function getCommentRegex () {

// Groups: 1: media type, 2: MIME type, 3: charset, 4: encoding, 5: data.

return /^\s*?\/[\/\*][@#]\s+?sourceMappingURL=data:(((?:application|text)\/json)(?:;charset=([^;,]+?)?)?)?(?:;(base64))?,(.*?)$/mg;

}

});

Object.defineProperty(exports, 'mapFileCommentRegex', {

get: function getMapFileCommentRegex () {

// Matches sourceMappingURL in either // or /* comment styles.

return /(?:\/\/[@#][ \t]+?sourceMappingURL=([^\s'"`]+?)[ \t]*?$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^*]+?)[ \t]*?(?:\*\/){1}[ \t]*?$)/mg;

}

});

var decodeBase64;

if (typeof Buffer !== 'undefined') {

if (typeof Buffer.from === 'function') {

decodeBase64 = decodeBase64WithBufferFrom;

} else {

decodeBase64 = decodeBase64WithNewBuffer;

}

} else {

decodeBase64 = decodeBase64WithAtob;

}

function decodeBase64WithBufferFrom(base64) {

return Buffer.from(base64, 'base64').toString();

}

function decodeBase64WithNewBuffer(base64) {

if (typeof value === 'number') {

throw new TypeError('The value to decode must not be of type number.');

}

return new Buffer(base64, 'base64').toString();

}

function decodeBase64WithAtob(base64) {

return decodeURIComponent(escape(atob(base64)));

}

function stripComment(sm) {

return sm.split(',').pop();

}

function readFromFileMap(sm, read) {

var r = exports.mapFileCommentRegex.exec(sm);

// for some odd reason //# .. captures in 1 and /* .. */ in 2

var filename = r[1] || r[2];

try {

var sm = read(filename);

if (sm != null && typeof sm.catch === 'function') {

return sm.catch(throwError);

} else {

return sm;

}

} catch (e) {

throwError(e);

}

function throwError(e) {

throw new Error('An error occurred while trying to read the map file at ' + filename + '\n' + e.stack);

}

}

function Converter (sm, opts) {

opts = opts || {};

if (opts.hasComment) {

sm = stripComment(sm);

}

if (opts.encoding === 'base64') {

sm = decodeBase64(sm);

} else if (opts.encoding === 'uri') {

sm = decodeURIComponent(sm);

}

if (opts.isJSON || opts.encoding) {

sm = JSON.parse(sm);

}

this.sourcemap = sm;

}

Converter.prototype.toJSON = function (space) {

return JSON.stringify(this.sourcemap, null, space);

};

if (typeof Buffer !== 'undefined') {

if (typeof Buffer.from === 'function') {

Converter.prototype.toBase64 = encodeBase64WithBufferFrom;

} else {

Converter.prototype.toBase64 = encodeBase64WithNewBuffer;

}

} else {

Converter.prototype.toBase64 = encodeBase64WithBtoa;

}

function encodeBase64WithBufferFrom() {

var json = this.toJSON();

return Buffer.from(json, 'utf8').toString('base64');

}

function encodeBase64WithNewBuffer() {

var json = this.toJSON();

if (typeof json === 'number') {

throw new TypeError('The json to encode must not be of type number.');

}

return new Buffer(json, 'utf8').toString('base64');

}

function encodeBase64WithBtoa() {

var json = this.toJSON();

return btoa(unescape(encodeURIComponent(json)));

}

Converter.prototype.toURI = function () {

var json = this.toJSON();

return encodeURIComponent(json);

};

Converter.prototype.toComment = function (options) {

var encoding, content, data;

if (options != null && options.encoding === 'uri') {

encoding = '';

content = this.toURI();

} else {

encoding = ';base64';

content = this.toBase64();

}

data = 'sourceMappingURL=data:application/json;charset=utf-8' + encoding + ',' + content;

return options != null && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;

};

// returns copy instead of original

Converter.prototype.toObject = function () {

return JSON.parse(this.toJSON());

};

Converter.prototype.addProperty = function (key, value) {

if (this.sourcemap.hasOwnProperty(key)) throw new Error('property "' + key + '" already exists on the sourcemap, use set property instead');

return this.setProperty(key, value);

};

Converter.prototype.setProperty = function (key, value) {

this.sourcemap[key] = value;

return this;

};

Converter.prototype.getProperty = function (key) {

return this.sourcemap[key];

};

exports.fromObject = function (obj) {

return new Converter(obj);

};

exports.fromJSON = function (json) {

return new Converter(json, { isJSON: true });

};

exports.fromURI = function (uri) {

return new Converter(uri, { encoding: 'uri' });

};

exports.fromBase64 = function (base64) {

return new Converter(base64, { encoding: 'base64' });

};

exports.fromComment = function (comment) {

var m, encoding;

comment = comment

.replace(/^\/\*/g, '//')

.replace(/\*\/$/g, '');

m = exports.commentRegex.exec(comment);

encoding = m && m[4] || 'uri';

return new Converter(comment, { encoding: encoding, hasComment: true });

};

function makeConverter(sm) {

return new Converter(sm, { isJSON: true });

}

exports.fromMapFileComment = function (comment, read) {

if (typeof read === 'string') {

throw new Error(

'String directory paths are no longer supported with `fromMapFileComment`\n' +

'Please review the Upgrading documentation at https://github.com/thlorenz/convert-source-map#upgrading'

)

}

var sm = readFromFileMap(comment, read);

if (sm != null && typeof sm.then === 'function') {

return sm.then(makeConverter);

} else {

return makeConverter(sm);

}

};

// Finds last sourcemap comment in file or returns null if none was found

exports.fromSource = function (content) {

var m = content.match(exports.commentRegex);

return m ? exports.fromComment(m.pop()) : null;

};

// Finds last sourcemap comment in file or returns null if none was found

exports.fromMapFileSource = function (content, read) {

if (typeof read === 'string') {

throw new Error(

'String directory paths are no longer supported with `fromMapFileSource`\n' +

'Please review the Upgrading documentation at https://github.com/thlorenz/convert-source-map#upgrading'

)

}

var m = content.match(exports.mapFileCommentRegex);

return m ? exports.fromMapFileComment(m.pop(), read) : null;

};

exports.removeComments = function (src) {

return src.replace(exports.commentRegex, '');

};

exports.removeMapFileComments = function (src) {

return src.replace(exports.mapFileCommentRegex, '');

};

exports.generateMapFileComment = function (file, options) {

var data = 'sourceMappingURL=' + file;

return options && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;

};