1 files changed, 105 insertions, 0 deletions
diff --git a/toolkit/components/glean/bindings/private/CustomDistribution.cpp b/toolkit/components/glean/bindings/private/CustomDistribution.cpp
new file mode 100644
index 0000000000..2f0226cb58
--- /dev/null
+++ b/toolkit/components/glean/bindings/private/CustomDistribution.cpp
@@ -0,0 +1,105 @@
+/* -*- 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/glean/bindings/CustomDistribution.h"
+
+#include "mozilla/ResultVariant.h"
+#include "mozilla/dom/GleanMetricsBinding.h"
+#include "mozilla/glean/bindings/HistogramGIFFTMap.h"
+#include "mozilla/glean/fog_ffi_generated.h"
+#include "nsJSUtils.h"
+#include "nsPrintfCString.h"
+#include "nsString.h"
+#include "js/PropertyAndElement.h"  // JS_DefineProperty
+
+namespace mozilla::glean {
+
+namespace impl {
+
+void CustomDistributionMetric::AccumulateSamples(
+    const nsTArray<uint64_t>& aSamples) const {
+  auto hgramId = HistogramIdForMetric(mId);
+  if (hgramId) {
+    auto id = hgramId.extract();
+    // N.B.: There is an `Accumulate(nsTArray<T>)`, but `T` is `uint32_t` and
+    // we got `uint64_t`s here.
+    for (auto sample : aSamples) {
+      Telemetry::Accumulate(id, sample);
+    }
+  }
+  fog_custom_distribution_accumulate_samples(mId, &aSamples);
+}
+
+void CustomDistributionMetric::AccumulateSamplesSigned(
+    const nsTArray<int64_t>& aSamples) const {
+  auto hgramId = HistogramIdForMetric(mId);
+  if (hgramId) {
+    auto id = hgramId.extract();
+    // N.B.: There is an `Accumulate(nsTArray<T>)`, but `T` is `uint32_t` and
+    // we got `int64_t`s here.
+    for (auto sample : aSamples) {
+      Telemetry::Accumulate(id, sample);
+    }
+  }
+  fog_custom_distribution_accumulate_samples_signed(mId, &aSamples);
+}
+
+Result<Maybe<DistributionData>, nsCString>
+CustomDistributionMetric::TestGetValue(const nsACString& aPingName) const {
+  nsCString err;
+  if (fog_custom_distribution_test_get_error(mId, &err)) {
+    return Err(err);
+  }
+  if (!fog_custom_distribution_test_has_value(mId, &aPingName)) {
+    return Maybe<DistributionData>();
+  }
+  nsTArray<uint64_t> buckets;
+  nsTArray<uint64_t> counts;
+  uint64_t sum;
+  fog_custom_distribution_test_get_value(mId, &aPingName, &sum, &buckets,
+                                         &counts);
+  return Some(DistributionData(buckets, counts, sum));
+}
+
+}  // namespace impl
+
+/* virtual */
+JSObject* GleanCustomDistribution::WrapObject(
+    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return dom::GleanCustomDistribution_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void GleanCustomDistribution::AccumulateSamples(
+    const dom::Sequence<int64_t>& aSamples) {
+  mCustomDist.AccumulateSamplesSigned(aSamples);
+}
+
+void GleanCustomDistribution::TestGetValue(
+    const nsACString& aPingName,
+    dom::Nullable<dom::GleanDistributionData>& aRetval, ErrorResult& aRv) {
+  auto result = mCustomDist.TestGetValue(aPingName);
+  if (result.isErr()) {
+    aRv.ThrowDataError(result.unwrapErr());
+    return;
+  }
+  auto optresult = result.unwrap();
+  if (optresult.isNothing()) {
+    return;
+  }
+
+  dom::GleanDistributionData ret;
+  ret.mSum = optresult.ref().sum;
+  auto& data = optresult.ref().values;
+  for (const auto& entry : data) {
+    dom::binding_detail::RecordEntry<nsCString, uint64_t> bucket;
+    bucket.mKey = nsPrintfCString("%" PRIu64, entry.GetKey());
+    bucket.mValue = entry.GetData();
+    ret.mValues.Entries().EmplaceBack(std::move(bucket));
+  }
+  aRetval.SetValue(std::move(ret));
+}
+
+}  // namespace mozilla::glean