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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/mediastream/identifiability_metrics.h"
#include "base/functional/callback.h"
#include "third_party/blink/public/common/privacy_budget/identifiability_metric_builder.h"
#include "third_party/blink/public/common/privacy_budget/identifiability_study_settings.h"
#include "third_party/blink/public/common/privacy_budget/identifiable_token.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_union_string_stringsequence.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_constrain_boolean_parameters.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_constrain_dom_string_parameters.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_constrain_double_range.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_constrain_long_range.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_constrain_point_2d_parameters.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_media_stream_constraints.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_media_track_constraint_set.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_media_track_constraints.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_point_2d.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_typedefs.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_boolean_constrainbooleanparameters.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_boolean_constraindoublerange_double.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_boolean_mediatrackconstraints.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_constraindomstringparameters_string_stringsequence.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_constraindoublerange_double.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_constrainlongrange_long.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_union_constrainpoint2dparameters_point2dsequence.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/platform/privacy_budget/identifiability_digest_helpers.h"
namespace blink {
namespace {
template <typename T>
void Visit(IdentifiableTokenBuilder& builder, const T* range) {
if (!range)
return;
builder.AddToken(range->hasExact() ? range->exact() : IdentifiableToken());
builder.AddToken(range->hasIdeal() ? range->ideal() : IdentifiableToken());
builder.AddToken(range->hasMax() ? range->max() : IdentifiableToken());
builder.AddToken(range->hasMin() ? range->min() : IdentifiableToken());
}
void Visit(IdentifiableTokenBuilder& builder, const V8ConstrainDouble* d) {
if (!d) {
builder.AddToken(IdentifiableToken());
return;
}
switch (d->GetContentType()) {
case V8ConstrainDouble::ContentType::kConstrainDoubleRange:
return Visit(builder, d->GetAsConstrainDoubleRange());
case V8ConstrainDouble::ContentType::kDouble:
builder.AddToken(d->GetAsDouble());
return;
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder, const V8ConstrainLong* l) {
if (!l) {
builder.AddToken(IdentifiableToken());
return;
}
switch (l->GetContentType()) {
case V8ConstrainLong::ContentType::kConstrainLongRange:
return Visit(builder, l->GetAsConstrainLongRange());
case V8ConstrainLong::ContentType::kLong:
builder.AddToken(l->GetAsLong());
return;
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder,
const V8UnionStringOrStringSequence* s) {
if (!s) {
builder.AddToken(IdentifiableToken());
return;
}
switch (s->GetContentType()) {
case V8UnionStringOrStringSequence::ContentType::kString:
builder.AddToken(IdentifiabilityBenignStringToken(s->GetAsString()));
return;
case V8UnionStringOrStringSequence::ContentType::kStringSequence:
for (const String& str : s->GetAsStringSequence()) {
builder.AddToken(IdentifiabilityBenignStringToken(str));
}
return;
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder, const V8ConstrainDOMString* s) {
if (!s) {
builder.AddToken(IdentifiableToken());
return;
}
switch (s->GetContentType()) {
case V8ConstrainDOMString::ContentType::kConstrainDOMStringParameters: {
const ConstrainDOMStringParameters* params =
s->GetAsConstrainDOMStringParameters();
Visit(builder, params->getExactOr(nullptr));
Visit(builder, params->getIdealOr(nullptr));
return;
}
case V8ConstrainDOMString::ContentType::kString:
builder.AddToken(IdentifiabilityBenignStringToken(s->GetAsString()));
return;
case V8ConstrainDOMString::ContentType::kStringSequence:
for (const String& str : s->GetAsStringSequence()) {
builder.AddToken(IdentifiabilityBenignStringToken(str));
}
return;
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder, const V8ConstrainBoolean* b) {
if (!b) {
builder.AddToken(IdentifiableToken());
return;
}
switch (b->GetContentType()) {
case V8ConstrainBoolean::ContentType::kBoolean:
builder.AddToken(b->GetAsBoolean());
return;
case V8ConstrainBoolean::ContentType::kConstrainBooleanParameters: {
const ConstrainBooleanParameters* params =
b->GetAsConstrainBooleanParameters();
builder.AddToken(params->hasExact() ? params->exact()
: IdentifiableToken());
builder.AddToken(params->hasIdeal() ? params->ideal()
: IdentifiableToken());
return;
}
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder,
const V8UnionBooleanOrConstrainDouble* x) {
if (!x) {
builder.AddToken(IdentifiableToken());
return;
}
switch (x->GetContentType()) {
case V8UnionBooleanOrConstrainDouble::ContentType::kBoolean:
builder.AddToken(x->GetAsBoolean());
return;
case V8UnionBooleanOrConstrainDouble::ContentType::kConstrainDoubleRange:
return Visit(builder, x->GetAsConstrainDoubleRange());
case V8UnionBooleanOrConstrainDouble::ContentType::kDouble:
builder.AddToken(x->GetAsDouble());
return;
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder,
const HeapVector<Member<Point2D>>& points) {
for (const auto& point : points) {
builder.AddToken(point->hasX() ? point->x() : IdentifiableToken());
builder.AddToken(point->hasY() ? point->y() : IdentifiableToken());
}
}
void Visit(IdentifiableTokenBuilder& builder, const V8ConstrainPoint2D* p) {
if (!p) {
builder.AddToken(IdentifiableToken());
return;
}
switch (p->GetContentType()) {
case V8ConstrainPoint2D::ContentType::kConstrainPoint2DParameters: {
const ConstrainPoint2DParameters* params =
p->GetAsConstrainPoint2DParameters();
if (params->hasExact()) {
Visit(builder, params->exact());
} else {
builder.AddToken(IdentifiableToken());
}
if (params->hasIdeal()) {
Visit(builder, params->ideal());
} else {
builder.AddToken(IdentifiableToken());
}
return;
}
case V8ConstrainPoint2D::ContentType::kPoint2DSequence:
return Visit(builder, p->GetAsPoint2DSequence());
}
NOTREACHED();
}
void Visit(IdentifiableTokenBuilder& builder,
const MediaTrackConstraintSet& set) {
// TODO(crbug.com/1070871): As a workaround for code simplicity, we use a
// default value of a union type if each member is not provided in input.
Visit(builder, set.getWidthOr(nullptr));
Visit(builder, set.getHeightOr(nullptr));
Visit(builder, set.getAspectRatioOr(nullptr));
Visit(builder, set.getFrameRateOr(nullptr));
Visit(builder, set.getFacingModeOr(nullptr));
Visit(builder, set.getSampleRateOr(nullptr));
Visit(builder, set.getSampleSizeOr(nullptr));
Visit(builder, set.getEchoCancellationOr(nullptr));
Visit(builder, set.getAutoGainControlOr(nullptr));
Visit(builder, set.getLatencyOr(nullptr));
Visit(builder, set.getChannelCountOr(nullptr));
Visit(builder, set.getWhiteBalanceModeOr(nullptr));
Visit(builder, set.getExposureModeOr(nullptr));
Visit(builder, set.getFocusModeOr(nullptr));
Visit(builder, set.getPointsOfInterestOr(nullptr));
Visit(builder, set.getExposureCompensationOr(nullptr));
Visit(builder, set.getExposureTimeOr(nullptr));
Visit(builder, set.getColorTemperatureOr(nullptr));
Visit(builder, set.getIsoOr(nullptr));
Visit(builder, set.getBrightnessOr(nullptr));
Visit(builder, set.getContrastOr(nullptr));
Visit(builder, set.getSaturationOr(nullptr));
Visit(builder, set.getSharpnessOr(nullptr));
Visit(builder, set.getFocusDistanceOr(nullptr));
Visit(builder, set.getPanOr(nullptr));
Visit(builder, set.getTiltOr(nullptr));
Visit(builder, set.getZoomOr(nullptr));
Visit(builder, set.getTorchOr(nullptr));
Visit(builder, set.getBackgroundBlurOr(nullptr));
Visit(builder, set.getBackgroundSegmentationMaskOr(nullptr));
Visit(builder, set.getEyeGazeCorrectionOr(nullptr));
Visit(builder, set.getFaceFramingOr(nullptr));
}
void Visit(IdentifiableTokenBuilder& builder,
const V8UnionBooleanOrMediaTrackConstraints* constraint) {
if (!constraint) {
builder.AddToken(IdentifiableToken());
return;
}
switch (constraint->GetContentType()) {
case V8UnionBooleanOrMediaTrackConstraints::ContentType::kBoolean:
builder.AddToken(constraint->GetAsBoolean());
return;
case V8UnionBooleanOrMediaTrackConstraints::ContentType::
kMediaTrackConstraints: {
const MediaTrackConstraints* constraints =
constraint->GetAsMediaTrackConstraints();
DCHECK(constraints);
if (constraints->hasAdvanced()) {
for (const auto& advanced : constraints->advanced()) {
Visit(builder, *advanced);
}
} else {
builder.AddToken(IdentifiableToken());
}
return;
}
}
NOTREACHED();
}
} // namespace
IdentifiableToken TokenFromConstraints(
const MediaStreamConstraints* constraints) {
IdentifiableTokenBuilder builder;
if (constraints) {
Visit(builder, constraints->audio());
Visit(builder, constraints->video());
} else {
builder.AddToken(IdentifiableToken());
}
return builder.GetToken();
}
void RecordIdentifiabilityMetric(const IdentifiableSurface& surface,
ExecutionContext* context,
IdentifiableToken token) {
if (surface.IsValid() && context &&
IdentifiabilityStudySettings::Get()->ShouldSampleSurface(surface)) {
IdentifiabilityMetricBuilder(context->UkmSourceID())
.Add(surface, token)
.Record(context->UkmRecorder());
}
}
} // namespace blink
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