mirror of https://github.com/seald/nedb
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
867 B
39 lines
867 B
var fs = require('fs')
|
|
, crypto = require('crypto')
|
|
;
|
|
|
|
|
|
/**
|
|
* Check if directory exists and create it on the fly if it is not the case
|
|
* TODO: make recursive
|
|
*/
|
|
function ensureDirectoryExists (dir, cb) {
|
|
var callback = cb || function () {};
|
|
|
|
fs.exists(dir, function (exists) {
|
|
if (exists) {
|
|
return callback();
|
|
} else {
|
|
fs.mkdir(dir, '0777', callback);
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Return a random alphanumerical string of length len
|
|
* There is a very small probability for the length to be less than len
|
|
* (il the base64 conversion yields to many pluses and slashes) but
|
|
* that's not an issue here
|
|
*/
|
|
function uid (len) {
|
|
return crypto.randomBytes(Math.ceil(len * 5 / 4))
|
|
.toString('base64')
|
|
.replace(/[+\/]/g, '')
|
|
.slice(0, len);
|
|
}
|
|
|
|
|
|
|
|
module.exports.ensureDirectoryExists = ensureDirectoryExists;
|
|
module.exports.uid = uid;
|
|
|