Fixed bug in RethinkDB document store and use classes

lib/document_stores/rethinkdb.js

@@ -1,7 +1,9 @@
 const crypto = require('crypto');
 const rethink = require('rethinkdbdash');
+const winston = require('winston');
 
-var RethinkDBStore = (options) => {
+class RethinkDBStore {
+  constructor(options) {
     this.client = rethink({
       silent: true,
       host: options.host || '127.0.0.1',
@@ -10,30 +12,34 @@ var RethinkDBStore = (options) => {
       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);
+  set(key, data, callback) {
+    this.client.table('pastes').insert({ id: RethinkDBStore.md5(key), data: data }).run((error) => {
+      if (error) {
+        callback(false);
+        winston.error('failed to insert to table', error);
+        return;
+      }
       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);
+  get(key, callback) {
+    this.client.table('pastes').get(RethinkDBStore.md5(key)).run((error, result) => {
+      if (error || !result) {
+        callback(false);
+        winston.error('failed to insert to table', error);
+        return;
+      }
       callback(result.data);
     });
-};
+  }
+}
 
 module.exports = RethinkDBStore;
+module.exports.md5 = (str) => {
+  const md5sum = crypto.createHash('md5');
+  md5sum.update(str);
+  return md5sum.digest('hex');
+};