Move storage mechanism to new object

lib/file_document_store.js

@@ -0,0 +1,36 @@
+var fs = require('fs');
+
+var winston = require('winston');
+var hashlib = require('hashlib');
+
+// For storing in files
+// TODO make data path configurable
+// TODO make store type configurable
+
+var FileDocumentStore = function(path) {
+  this.basePath = path;
+};
+
+// Save data in a file, key as md5 - since we don't know what we could be passed here
+FileDocumentStore.prototype.set = function(key, data, callback) {
+  var _this = this;
+  fs.mkdir(this.basePath, '700', function() {
+    fs.writeFile(_this.basePath + '/' + hashlib.md5(key), data, 'utf8', function() {
+      callback(true); // TODO handle errors
+    });
+  });
+};
+
+// Get data from a file from key
+FileDocumentStore.prototype.get = function(key, callback) {
+  fs.readFile(this.basePath + '/' + hashlib.md5(key), 'utf8', function(err, data) {
+    if (err) {
+      callback(false);
+    }
+    else {
+      callback(data);
+    }
+  });
+};
+
+module.exports = FileDocumentStore;