Initial commit

node_modules/mongodb/lib/operations/estimated_document_count.js

@@ -0,0 +1,58 @@
+'use strict';
+
+const Aspect = require('./operation').Aspect;
+const defineAspects = require('./operation').defineAspects;
+const CommandOperationV2 = require('./command_v2');
+
+class EstimatedDocumentCountOperation extends CommandOperationV2 {
+  constructor(collection, query, options) {
+    if (typeof options === 'undefined') {
+      options = query;
+      query = undefined;
+    }
+
+    super(collection, options);
+    this.collectionName = collection.s.namespace.collection;
+    if (query) {
+      this.query = query;
+    }
+  }
+
+  execute(server, callback) {
+    const options = this.options;
+    const cmd = { count: this.collectionName };
+
+    if (this.query) {
+      cmd.query = this.query;
+    }
+
+    if (typeof options.skip === 'number') {
+      cmd.skip = options.skip;
+    }
+
+    if (typeof options.limit === 'number') {
+      cmd.limit = options.limit;
+    }
+
+    if (options.hint) {
+      cmd.hint = options.hint;
+    }
+
+    super.executeCommand(server, cmd, (err, response) => {
+      if (err) {
+        callback(err);
+        return;
+      }
+
+      callback(null, response.n);
+    });
+  }
+}
+
+defineAspects(EstimatedDocumentCountOperation, [
+  Aspect.READ_OPERATION,
+  Aspect.RETRYABLE,
+  Aspect.EXECUTE_WITH_SELECTION
+]);
+
+module.exports = EstimatedDocumentCountOperation;