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short.js
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short.js
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// core
var mongoose = require("mongoose");
var base = require("base-converter");
var ShortURL = require("../models/ShortURL.js");
function hesher(URL) {
var id = Math.floor(Math.random() * (100000 - 9999999 + 1) + 9999999);
var hash = base.decTo62(id);
return hash;
};
var short = function(){};
// if it exists, use pre-existing
short.make = function(URL, callback) {
var hashedURL = hesher(URL);
ShortURL.checkExists(hashedURL, function(error, shortenedURLs) {
if (error) {
callback(error, null);
} else {
if (shortenedURLs.length === 0) {
var shortURLItem = new ShortURL({
URL : URL,
hash : hashedURL
});
shortURLItem.save(function(error, item) {
if (error) {
callback(error, null);
} else {
callback(null, item);
};
});
} else {
callback(null, shortenedURLs[0]);
}
}
});
};
short.get = function(hash, callback) {
ShortURL.findByHash(hash, function(error, URL) {
if (error) {
callback(error, null);
} else {
callback(null, URL);
};
});
};
module.exports = short;
/* EOF */