Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/fs-mkdirp-stream/mkdirp.js b/node_modules/fs-mkdirp-stream/mkdirp.js
new file mode 100644
index 0000000..e70031b
--- /dev/null
+++ b/node_modules/fs-mkdirp-stream/mkdirp.js
@@ -0,0 +1,71 @@
+'use strict';
+
+var path = require('path');
+
+var fs = require('graceful-fs');
+
+var MASK_MODE = parseInt('7777', 8);
+var DEFAULT_DIR_MODE = parseInt('0777', 8);
+
+function mkdirp(dirpath, customMode, callback) {
+  if (typeof customMode === 'function') {
+    callback = customMode;
+    customMode = undefined;
+  }
+
+  var mode = customMode || (DEFAULT_DIR_MODE & ~process.umask());
+  dirpath = path.resolve(dirpath);
+
+  fs.mkdir(dirpath, mode, onMkdir);
+
+  function onMkdir(mkdirErr) {
+    if (!mkdirErr) {
+      return fs.stat(dirpath, onStat);
+    }
+
+    switch (mkdirErr.code) {
+      case 'ENOENT': {
+        return mkdirp(path.dirname(dirpath), onRecurse);
+      }
+
+      case 'EEXIST': {
+        return fs.stat(dirpath, onStat);
+      }
+
+      default: {
+        return callback(mkdirErr);
+      }
+    }
+
+    function onStat(statErr, stats) {
+      if (statErr) {
+        return callback(statErr);
+      }
+
+      if (!stats.isDirectory()) {
+        return callback(mkdirErr);
+      }
+
+      // TODO: Is it proper to mask like this?
+      if ((stats.mode & MASK_MODE) === mode) {
+        return callback();
+      }
+
+      if (!customMode) {
+        return callback();
+      }
+
+      fs.chmod(dirpath, mode, callback);
+    }
+  }
+
+  function onRecurse(recurseErr) {
+    if (recurseErr) {
+      return callback(recurseErr);
+    }
+
+    mkdirp(dirpath, mode, callback);
+  }
+}
+
+module.exports = mkdirp;