Initial commit

node_modules/mongodb/lib/operations/find_one.js

@@ -0,0 +1,37 @@
+'use strict';
+
+const handleCallback = require('../utils').handleCallback;
+const OperationBase = require('./operation').OperationBase;
+const toError = require('../utils').toError;
+
+class FindOneOperation extends OperationBase {
+  constructor(collection, query, options) {
+    super(options);
+
+    this.collection = collection;
+    this.query = query;
+  }
+
+  execute(callback) {
+    const coll = this.collection;
+    const query = this.query;
+    const options = this.options;
+
+    try {
+      const cursor = coll
+        .find(query, options)
+        .limit(-1)
+        .batchSize(1);
+
+      // Return the item
+      cursor.next((err, item) => {
+        if (err != null) return handleCallback(callback, toError(err), null);
+        handleCallback(callback, null, item);
+      });
+    } catch (e) {
+      callback(e);
+    }
+  }
+}
+
+module.exports = FindOneOperation;