Move all source files into 'src' folder.

src/GridStoreAdapter.js

@@ -0,0 +1,48 @@
+// GridStoreAdapter
+//
+// Stores files in Mongo using GridStore
+// Requires the database adapter to be based on mongoclient
+
+var GridStore = require('mongodb').GridStore;
+var path = require('path');
+
+// For a given config object, filename, and data, store a file
+// Returns a promise
+function create(config, filename, data) {
+  return config.database.connect().then(() => {
+    var gridStore = new GridStore(config.database.db, filename, 'w');
+    return gridStore.open();
+  }).then((gridStore) => {
+    return gridStore.write(data);
+  }).then((gridStore) => {
+    return gridStore.close();
+  });
+}
+
+// Search for and return a file if found by filename
+// Resolves a promise that succeeds with the buffer result
+// from GridStore
+function get(config, filename) {
+  return config.database.connect().then(() => {
+    return GridStore.exist(config.database.db, filename);
+  }).then(() => {
+    var gridStore = new GridStore(config.database.db, filename, 'r');
+    return gridStore.open();
+  }).then((gridStore) => {
+    return gridStore.read();
+  });
+}
+
+// Generates and returns the location of a file stored in GridStore for the
+// given request and filename
+function location(config, req, filename) {
+  return (req.protocol + '://' + req.get('host') +
+    path.dirname(req.originalUrl) + '/' + req.config.applicationId +
+    '/' + encodeURIComponent(filename));
+}
+
+module.exports = {
+  create: create,
+  get: get,
+  location: location
+};