started mongo stuff, but it's a PITA. fuck mongo

parts/3/phonebookBackend/node_modules/mongoose/lib/cast/uuid.js

@@ -0,0 +1,78 @@
+'use strict';
+
+const MongooseBuffer = require('../types/buffer');
+
+const UUID_FORMAT = /[0-9a-f]{8}-[0-9a-f]{4}-[0-9][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}/i;
+const Binary = MongooseBuffer.Binary;
+
+module.exports = function castUUID(value) {
+  if (value == null) {
+    return value;
+  }
+
+  function newBuffer(initbuff) {
+    const buff = new MongooseBuffer(initbuff);
+    buff._subtype = 4;
+    return buff;
+  }
+
+  if (typeof value === 'string') {
+    if (UUID_FORMAT.test(value)) {
+      return stringToBinary(value);
+    } else {
+      throw new Error(`"${value}" is not a valid UUID string`);
+    }
+  }
+
+  if (Buffer.isBuffer(value)) {
+    return newBuffer(value);
+  }
+
+  if (value instanceof Binary) {
+    return newBuffer(value.value(true));
+  }
+
+  // Re: gh-647 and gh-3030, we're ok with casting using `toString()`
+  // **unless** its the default Object.toString, because "[object Object]"
+  // doesn't really qualify as useful data
+  if (value.toString && value.toString !== Object.prototype.toString) {
+    if (UUID_FORMAT.test(value.toString())) {
+      return stringToBinary(value.toString());
+    }
+  }
+
+  throw new Error(`"${value}" cannot be casted to a UUID`);
+};
+
+module.exports.UUID_FORMAT = UUID_FORMAT;
+
+/**
+ * Helper function to convert the input hex-string to a buffer
+ * @param {String} hex The hex string to convert
+ * @returns {Buffer} The hex as buffer
+ * @api private
+ */
+
+function hex2buffer(hex) {
+  // use buffer built-in function to convert from hex-string to buffer
+  const buff = hex != null && Buffer.from(hex, 'hex');
+  return buff;
+}
+
+/**
+ * Convert a String to Binary
+ * @param {String} uuidStr The value to process
+ * @returns {MongooseBuffer} The binary to store
+ * @api private
+ */
+
+function stringToBinary(uuidStr) {
+  // Protect against undefined & throwing err
+  if (typeof uuidStr !== 'string') uuidStr = '';
+  const hex = uuidStr.replace(/[{}-]/g, ''); // remove extra characters
+  const bytes = hex2buffer(hex);
+  const buff = new MongooseBuffer(bytes);
+  buff._subtype = 4;
+
+  return buff;
+}