Metrics for feature engagement tracker.

components/feature_engagement_tracker/internal/stats.cc

Index: components/feature_engagement_tracker/internal/stats.cc
diff --git a/components/feature_engagement_tracker/internal/stats.cc b/components/feature_engagement_tracker/internal/stats.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a3e3e2ce0ab3e874cbfa161a29f5ab1d7f017591
--- /dev/null
+++ b/components/feature_engagement_tracker/internal/stats.cc
@@ -0,0 +1,192 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/feature_engagement_tracker/internal/stats.h"
+
+#include <string>
+
+#include "base/metrics/histogram_functions.h"
+#include "base/metrics/histogram_macros.h"
+#include "base/metrics/user_metrics.h"
+#include "components/feature_engagement_tracker/public/feature_list.h"
+
+namespace feature_engagement_tracker {
+namespace stats {
+namespace {
+
+// Histogram suffixes for database metrics, must match the ones in
+// histograms.xml.
+const char kEventStoreSuffix[] = "EventStore";
+const char kAvailabilityStoreSuffix[] = "AvailabilityStore";
+
+// Helper function to log a TriggerHelpUIResult.
+void LogTriggerHelpUIResult(const std::string& name,
+                            TriggerHelpUIResult result) {
+  // Must not use histograms macros here because we pass in the histogram name.
+  base::UmaHistogramEnumeration(name, result, TriggerHelpUIResult::COUNT);
+}
+
+}  // namespace
+
+std::string ToDbHistogramSuffix(StoreType type) {
+  switch (type) {
+    case StoreType::EVENTS_STORE:
+      return std::string(kEventStoreSuffix);
+    case StoreType::AVAILABILITY_STORE:
+      return std::string(kAvailabilityStoreSuffix);
+    default:
+      NOTREACHED();
+      return std::string();
+  }
+}
+
+void RecordNotifyEvent(const std::string& event_name,
+                       const Configuration* config,
+                       bool is_model_ready) {
+  DCHECK(!event_name.empty());
+  DCHECK(config);
+
+  // Find which feature this event belongs to.
+  const Configuration::ConfigMap& features = config->GetRegisteredFeatures();
+  std::string feature_name;
+  for (const auto& element : features) {
+    const base::Feature* feature = element.first;
+    const FeatureConfig& feature_config = element.second;
+
+    // Track used event separately.
+    if (feature_config.used.name == event_name) {
+      feature_name = feature->name;
+      DCHECK(!feature_name.empty());
+      std::string used_event_action = "InProductHelp.NotifyUsedEvent.";
+      used_event_action.append(feature_name);
+      base::RecordComputedAction(used_event_action);
+      break;
+    }
+
+    // Find if the |event_name| matches any configuration.
+    for (const auto& event : feature_config.event_configs) {
+      if (event.name == event_name) {
+        feature_name = feature->name;
+        break;
+      }
+    }
+    if (feature_config.trigger.name == event_name) {
+      feature_name = feature->name;
+      break;
+    }
+  }
+
+  // Do nothing if no events in the configuration matches the |event_name|.
+  if (feature_name.empty())
+    return;
+
+  std::string event_action = "InProductHelp.NotifyEvent.";
+  event_action.append(feature_name);
+  base::RecordComputedAction(event_action);
+
+  std::string event_histogram = "InProductHelp.NotifyEventReadyState.";
+  event_histogram.append(feature_name);
+  base::UmaHistogramBoolean(event_histogram, is_model_ready);
+}
+
+void RecordShouldTriggerHelpUI(const base::Feature& feature,
+                               const ConditionValidator::Result& result) {
+  // Records the user action.
+  std::string name = "InProductHelp.ShouldTriggerHelpUI.";
+  name.append(feature.name);
+  base::RecordComputedAction(name);
+
+  // Total count histogram, used to compute the percentage of each failure type.
+  if (result.NoErrors()) {
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::SUCCESS);
+  } else {
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::FAILURE);
+  }
+
+  // Histogram about the failure reasons.
+  if (!result.event_model_ready_ok)
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::FAILURE_MODEL_NOT_READY);
+  if (!result.currently_showing_ok) {
+    LogTriggerHelpUIResult(name,
+                           TriggerHelpUIResult::FAILURE_CURRENTLY_SHOWING);
+  }
+  if (!result.feature_enabled_ok) {
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::FAILURE_FEATURE_DISABLED);
+  }
+  if (!result.config_ok) {
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::FAILURE_CONFIG_INVALID);
+  }
+  if (!result.used_ok) {
+    LogTriggerHelpUIResult(
+        name, TriggerHelpUIResult::FAILURE_USED_PRECONDITION_UNMET);
+  }
+  if (!result.trigger_ok) {
+    LogTriggerHelpUIResult(
+        name, TriggerHelpUIResult::FAILURE_TRIGGER_PRECONDITION_UNMET);
+  }
+  if (!result.preconditions_ok) {
+    LogTriggerHelpUIResult(
+        name, TriggerHelpUIResult::FAILURE_OTHER_PRECONDITION_UNMET);
+  }
+  if (!result.session_rate_ok) {
+    LogTriggerHelpUIResult(name, TriggerHelpUIResult::FAILURE_SESSION_RATE);
+  }
+  if (!result.availability_model_ready_ok) {
+    LogTriggerHelpUIResult(
+        name, TriggerHelpUIResult::FAILURE_AVAILABILITY_MODEL_NOT_READY);
+  }
+  if (!result.availability_ok) {
+    LogTriggerHelpUIResult(
+        name, TriggerHelpUIResult::FAILURE_AVAILABILITY_PRECONDITION_UNMET);
+  }
+}
+
+void RecordUserDismiss() {
+  base::RecordAction(base::UserMetricsAction("InProductHelp.Dismissed"));
+}
+
+void RecordDbUpdate(bool success, StoreType type) {
+  std::string histogram_name =
+      "InProductHelp.Db.Update." + ToDbHistogramSuffix(type);
+  base::UmaHistogramBoolean(histogram_name, success);
+}
+
+void RecordDbInitEvent(bool success, StoreType type) {
+  std::string histogram_name =
+      "InProductHelp.Db.Init." + ToDbHistogramSuffix(type);
+  base::UmaHistogramBoolean(histogram_name, success);
+}
+
+void RecordEventDbLoadEvent(bool success, const std::vector<Event>& events) {
+  std::string histogram_name =
+      "InProductHelp.Db.Load." + ToDbHistogramSuffix(StoreType::EVENTS_STORE);
+  base::UmaHistogramBoolean(histogram_name, success);
+  UMA_HISTOGRAM_BOOLEAN("InProductHelp.Db.Load", success);
+
+  if (!success)
+    return;
+
+  // Tracks total number of events records when the database is successfully
+  // loaded.
+  int event_count = 0;
+  for (const auto& event : events)
+    event_count += event.events_size();
+  UMA_HISTOGRAM_COUNTS_1000("InProductHelp.Db.TotalEvents", event_count);
+}
+
+void RecordAvailabilityDbLoadEvent(bool success) {
+  std::string histogram_name =
+      "InProductHelp.Db.Load." +
+      ToDbHistogramSuffix(StoreType::AVAILABILITY_STORE);
+  base::UmaHistogramBoolean(histogram_name, success);
+  UMA_HISTOGRAM_BOOLEAN("InProductHelp.Db.Load", success);
+}
+
+void RecordConfigParsingEvent(ConfigParsingEvent event) {
+  UMA_HISTOGRAM_ENUMERATION("InProductHelp.Config.ParsingEvent", event,
+                            ConfigParsingEvent::COUNT);
+}
+
+}  // namespace stats
+}  // namespace feature_engagement_tracker