Merge pull request #189 from PassTheMayo/master

All of which are optional except `type` with very logical default values.

### RethinkDB

To use the RethinkDB storage system, you must install the `rethinkdbdash` package via npm

`npm install rethinkdbdash`

Once you've done that, your config section should look like this:

``` json

{

  "type": "rethinkdb",

  "host": "127.0.0.1",

  "port": 28015,

  "db": "haste"

}

```

In order for this to work, the database must be pre-created before the script is ran.

Also, you must create an `uploads` table, which will store all the data for uploads.

You can optionally add the `user` and `password` properties to use a user system.

## Author

John Crepezzi <john.crepezzi@gmail.com>

const crypto = require('crypto');

const rethink = require('rethinkdbdash');

var RethinkDBStore = (options) => {

  this.client = rethink({

    silent: true,

    host: options.host || '127.0.0.1',

    port: options.port || 28015,

    db: options.db || 'haste',

    user: options.user || 'admin',

    password: options.password || ''

  });

};

RethinkDBStore.md5 = (str) => {

  const md5sum = crypto.createHash('md5');

  md5sum.update(str);

  return md5sum.digest('hex');

};

RethinkDBStore.prototype.set = (key, data, callback) => {

  try {

    this.client.table('uploads').insert({ id: RethinkDBStore.md5(key), data: data }).run((error) =? {

      if (error) return callback(false);

      callback(true);

    });

  } catch (err) {

    callback(false);

  }

};

RethinkDBStore.prototype.get = (key, callback) => {

  this.client.table('uploads').get(RethinkDBStore.md5(key)).run((error, result) => {

    if (error || !result) return callback(false);

    callback(result.data);

  });

};

module.exports = RethinkDBStore;