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/*!
* split-string <https://github.com/jonschlinkert/split-string>
*
* Copyright (c) 2015, 2017, Jon Schlinkert.
* Released under the MIT License.
*/
'use strict';
var extend = require('extend-shallow');
module.exports = function(str, options, fn) {
if (typeof str !== 'string') {
throw new TypeError('expected a string');
}
if (typeof options === 'function') {
fn = options;
options = null;
}
// allow separator to be defined as a string
if (typeof options === 'string') {
options = { sep: options };
}
var opts = extend({sep: '.'}, options);
var quotes = opts.quotes || ['"', "'", '`'];
var tokens = [];
var arr = [''];
var sep = opts.sep;
var len = str.length;
var idx = -1;
var closeIdx;
while (++idx < len) {
var ch = str[idx];
var next = str[idx + 1];
var tok = { val: ch, idx: idx, arr: arr, str: str };
tokens.push(tok);
if (ch === '\\') {
tok.val = keepEscaping(opts, str, idx) === true ? (ch + next) : next;
tok.escaped = true;
if (typeof fn === 'function') {
fn(tok);
}
arr[arr.length - 1] += tok.val;
idx++;
continue;
}
if (quotes.indexOf(ch) !== -1) {
closeIdx = getClose(str, ch, idx + 1);
if (closeIdx === -1) {
arr[arr.length - 1] += ch;
continue;
}
if (keepQuotes(ch, opts) === true) {
ch = str.slice(idx, closeIdx + 1);
} else {
ch = str.slice(idx + 1, closeIdx);
}
tok.val = ch;
tok.idx = idx = closeIdx;
}
if (typeof fn === 'function') {
fn(tok, tokens);
ch = tok.val;
idx = tok.idx;
}
if (tok.val === sep && tok.split !== false) {
arr.push('');
continue;
}
arr[arr.length - 1] += tok.val;
}
return arr;
};
function getClose(str, ch, i) {
var idx = str.indexOf(ch, i);
if (str.charAt(idx - 1) === '\\') {
return getClose(str, ch, idx + 1);
}
return idx;
}
function keepQuotes(ch, opts) {
if (opts.keepDoubleQuotes === true && ch === '"') return true;
if (opts.keepSingleQuotes === true && ch === "'") return true;
return opts.keepQuotes;
}
function keepEscaping(opts, str, idx) {
return opts.keepEscaping === true || str[idx + 1] === '\\';
}
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