Initial commit.

lib/hostr-id.js

@@ -0,0 +1,26 @@
+const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+
+function randomID() {
+  let rand = '';
+  for (let i = 0; i < 12; i++) {
+    rand += chars.charAt(Math.floor((Math.random() * chars.length)));
+  }
+  return rand;
+}
+
+function* checkId(Files, fileId, attempts) {
+  if (attempts > 10) {
+    return false;
+  }
+  const file = yield Files.findOne({'_id': fileId});
+  if(file === null) {
+    return fileId;
+  } else {
+    return checkId(randomID(), attempts++);
+  }
+}
+
+export default function* (Files) {
+  let attempts = 0;
+  return yield checkId(Files, randomID(), attempts);
+}