1 files changed, 71 insertions, 0 deletions
diff --git a/toolkit/components/glean/bindings/Category.cpp b/toolkit/components/glean/bindings/Category.cpp
new file mode 100644
index 0000000000..707482eaec
--- /dev/null
+++ b/toolkit/components/glean/bindings/Category.cpp
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/GleanBinding.h"
+#include "mozilla/glean/bindings/Glean.h"
+#include "mozilla/glean/bindings/Category.h"
+#include "mozilla/glean/bindings/GleanJSMetricsLookup.h"
+
+namespace mozilla::glean {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Category)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Category)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Category)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Category)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+JSObject* Category::WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) {
+  return dom::GleanCategory_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+already_AddRefed<nsISupports> Category::NamedGetter(const nsAString& aName,
+                                                    bool& aFound) {
+  aFound = false;
+
+  nsCString metricName;
+  metricName.AppendASCII(GetCategoryName(mId), mLength);
+  metricName.AppendLiteral(".");
+  AppendUTF16toUTF8(aName, metricName);
+
+  Maybe<uint32_t> metricIdx = MetricByNameLookup(metricName);
+
+  if (metricIdx.isNothing()) {
+    aFound = false;
+    return nullptr;
+  }
+
+  aFound = true;
+  return NewMetricFromId(metricIdx.value());
+}
+
+bool Category::NameIsEnumerable(const nsAString& aName) { return false; }
+
+void Category::GetSupportedNames(nsTArray<nsString>& aNames) {
+  const char* category = GetCategoryName(mId);
+
+  for (metric_entry_t entry : sMetricByNameLookupEntries) {
+    const char* identifier = GetMetricIdentifier(entry);
+
+    // We're iterating all metrics,
+    // so we need to check for the ones in the right category.
+    //
+    // We need to ensure that we found _only_ the exact category by checking it
+    // is followed by a dot.
+    // We need to check the category first to ensure the string is at least that
+    // long, so the check at `mLength` is valid.
+    if (strncmp(category, identifier, mLength) == 0 &&
+        identifier[mLength] == '.') {
+      const char* metricName = &identifier[mLength + 1];
+      aNames.AppendElement()->AssignASCII(metricName);
+    }
+  }
+}
+
+}  // namespace mozilla::glean