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'use strict';
var path = require('path'),
fs = require('fs');
/**
* Codec for relative paths with respect to the context of the file being compiled.
* @type {{name:string, decode: function, encode: function, root: function}}
*/
module.exports = {
name : 'source-relative',
decode: decode,
encode: encode,
root : root
};
/**
* Decode the given uri.
* Any path with or without leading slash is tested against context directory.
* Exclude module paths containing `~`.
* @this {{options: object}} A loader or compilation
* @param {string} uri A source uri to decode
* @returns {boolean|string} False where unmatched else the decoded path
*/
function decode(uri) {
/* jshint validthis:true */
var base = this.context,
absFile = !!base && path.normalize(path.join(base, uri)),
isValid = !!absFile && fs.existsSync(absFile) && fs.statSync(absFile).isFile();
return isValid && absFile;
}
/**
* Encode the given file path.
* @this {{options: object}} A loader or compilation
* @param {string} absolute An absolute file path to encode
* @returns {string} A uri
*/
function encode(absolute) {
/* jshint validthis:true */
return path.relative(this.context, absolute);
}
/**
* The source-map root where relevant.
* @this {{options: object}} A loader or compilation
* @returns {string|undefined} The source-map root applicable to any encoded uri
*/
function root() {
/* jshint validthis:true */
return this.context;
}