[Payments] Move journey logger to native.

components/payments/core/journey_logger.cc

Index: components/payments/core/journey_logger.cc
diff --git a/components/payments/core/journey_logger.cc b/components/payments/core/journey_logger.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9ae8d9a0daa93b4c6e5994a7e5700fde65b25ba1
--- /dev/null
+++ b/components/payments/core/journey_logger.cc
@@ -0,0 +1,171 @@
+// 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/payments/core/journey_logger.h"
+
+#include <algorithm>
+
+#include "base/metrics/histogram_functions.h"
+#include "base/metrics/histogram_macros.h"
+
+namespace payments {
+
+JourneyLogger::JourneyLogger()
+    : was_can_make_payments_used_(false),
+      could_make_payment_(false),
+      was_show_called_(false) {}
+
+void JourneyLogger::IncrementSelectionAdds(int section) {
+  DCHECK(section < SECTION_MAX);
+  sections_[section].number_selection_adds_++;
+}
+
+void JourneyLogger::IncrementSelectionChanges(int section) {
+  DCHECK(section < SECTION_MAX);
+  sections_[section].number_selection_changes_++;
+}
+
+void JourneyLogger::IncrementSelectionEdits(int section) {
+  DCHECK(section < SECTION_MAX);
+  sections_[section].number_selection_edits_++;
+}
+
+void JourneyLogger::SetNumberOfSuggestionsShown(int section, int number) {
+  DCHECK(section < SECTION_MAX);
+  sections_[section].number_suggestions_shown_ = number;
+  sections_[section].is_requested_ = true;
+}
+
+void JourneyLogger::SetCanMakePaymentValue(bool value) {
+  was_can_make_payments_used_ = true;
+  could_make_payment_ |= value;
+}
+
+void JourneyLogger::SetShowCalled() {
+  was_show_called_ = true;
+}
+
+void JourneyLogger::RecordJourneyStatsHistograms(
+    const std::string& submission_type) {
+  RecordSectionSpecificStats(submission_type);
+
+  // Record the CanMakePayment metrics based on whether the transaction was
+  // completed or aborted by the user (UserAborted) or otherwise (OtherAborted).
+  RecordCanMakePaymentStats(submission_type.find("Abort") != std::string::npos
+                                ? COMPLETION_STATUS_ABORTED
+                                : COMPLETION_STATUS_COMPLETED);
+}
+
+void JourneyLogger::RecordSectionSpecificStats(
+    const std::string& submission_type) {
+  // Record whether the user had suggestions for each requested information.
+  bool user_had_all_requested_information = true;
+
+  for (int i = 0; i < NUMBER_OF_SECTIONS; ++i) {
+    std::string name_suffix = "";
+    switch (i) {
+      case SECTION_SHIPPING_ADDRESS:
+        name_suffix = "ShippingAddress." + submission_type;
+        break;
+      case SECTION_CONTACT_INFO:
+        name_suffix = "ContactInfo." + submission_type;
+        break;
+      case SECTION_CREDIT_CARDS:
+        name_suffix = "CreditCards." + submission_type;
+        break;
+      default:
+        break;
+    }
+
+    DCHECK(!name_suffix.empty());
+
+    // Only log the metrics for a section if it was requested by the merchant.
+    if (sections_[i].is_requested_) {
+      base::UmaHistogramCustomCounts(
+          "PaymentRequest.NumberOfSelectionAdds." + name_suffix,
+          std::min(sections_[i].number_selection_adds_, MAX_EXPECTED_SAMPLE),
+          MIN_EXPECTED_SAMPLE, MAX_EXPECTED_SAMPLE, NUMBER_BUCKETS);
+      base::UmaHistogramCustomCounts(
+          "PaymentRequest.NumberOfSelectionChanges." + name_suffix,
+          std::min(sections_[i].number_selection_changes_, MAX_EXPECTED_SAMPLE),
+          MIN_EXPECTED_SAMPLE, MAX_EXPECTED_SAMPLE, NUMBER_BUCKETS);
+      base::UmaHistogramCustomCounts(
+          "PaymentRequest.NumberOfSelectionEdits." + name_suffix,
+          std::min(sections_[i].number_selection_edits_, MAX_EXPECTED_SAMPLE),
+          MIN_EXPECTED_SAMPLE, MAX_EXPECTED_SAMPLE, NUMBER_BUCKETS);
+      base::UmaHistogramCustomCounts(
+          "PaymentRequest.NumberOfSuggestionsShown." + name_suffix,
+          std::min(sections_[i].number_suggestions_shown_, MAX_EXPECTED_SAMPLE),
+          MIN_EXPECTED_SAMPLE, MAX_EXPECTED_SAMPLE, NUMBER_BUCKETS);
+
+      if (sections_[i].number_suggestions_shown_ == 0) {
+        user_had_all_requested_information = false;
+      }
+    }
+  }
+
+  // Record metrics about completion based on whether the user had suggestions
+  // for each requested information.
+  int completion_status = submission_type.find("Abort") != std::string::npos
+                              ? COMPLETION_STATUS_ABORTED
+                              : COMPLETION_STATUS_COMPLETED;
+  if (user_had_all_requested_information) {
+    UMA_HISTOGRAM_ENUMERATION(
+        "PaymentRequest.UserHadSuggestionsForEverything."
+        "EffectOnCompletion",
+        completion_status, COMPLETION_STATUS_MAX);
+  } else {
+    UMA_HISTOGRAM_ENUMERATION(
+        "PaymentRequest.UserDidNotHaveSuggestionsForEverything."
+        "EffectOnCompletion",
+        completion_status, COMPLETION_STATUS_MAX);
+  }
+}
+
+void JourneyLogger::RecordCanMakePaymentStats(int completion_status) {
+  // Record CanMakePayment usage.
+  UMA_HISTOGRAM_ENUMERATION("PaymentRequest.CanMakePayment.Usage",
+                            was_can_make_payments_used_
+                                ? CAN_MAKE_PAYMENT_USED
+                                : CAN_MAKE_PAYMENT_NOT_USED,
+                            CAN_MAKE_PAYMENT_USE_MAX);
+
+  RecordCanMakePaymentEffectOnShow();
+  RecordCanMakePaymentEffectOnCompletion(completion_status);
+}
+
+void JourneyLogger::RecordCanMakePaymentEffectOnShow() {
+  if (!was_can_make_payments_used_)
+    return;
+
+  int effect_on_show = 0;
+  if (was_show_called_)
+    effect_on_show |= CMP_SHOW_DID_SHOW;
+  if (could_make_payment_)
+    effect_on_show |= CMP_SHOW_could_make_payment_;

[Mathieu, 2017/03/23 21:19:48]

fix

[sebsg, 2017/03/24 13:35:29]

Done.

+
+  UMA_HISTOGRAM_ENUMERATION("PaymentRequest.CanMakePayment.Used.EffectOnShow",
+                            effect_on_show, CMP_SHOW_MAX);
+}
+
+void JourneyLogger::RecordCanMakePaymentEffectOnCompletion(
+    int completion_status) {
+  if (!was_show_called_)
+    return;
+
+  std::string histogram_name = "PaymentRequest.CanMakePayment.";
+

[Mathieu, 2017/03/23 21:19:48]

remove extra line

[sebsg, 2017/03/24 13:35:29]

Done.

+  if (!was_can_make_payments_used_) {
+    histogram_name += "NotUsed.WithShowEffectOnCompletion";
+  } else if (could_make_payment_) {
+    histogram_name += "Used.TrueWithShowEffectOnCompletion";
+  } else {
+    histogram_name += "Used.FalseWithShowEffectOnCompletion";
+  }
+
+  UMA_HISTOGRAM_ENUMERATION(histogram_name, completion_status,

[Mathieu, 2017/03/23 21:19:48]

this is wrong. this macro statically caches the histogram name at the call site.


See
https://cs.chromium.org/chromium/src/components/autofill/core/browser/autofil...
for how to build the call in this case.

This issue *may* show if you use two JourneyLoggers and attempt to log a
different value. Can you see if a test would uncover that? 

Fix elsewhere in the code too

[sebsg, 2017/03/24 13:35:29]

Done.

+                            COMPLETION_STATUS_MAX);
+}
+
+}  // namespace payments