Add extra information for ReadingList ContentSuggestion

components/ntp_snippets/reading_list/reading_list_distillation_state_util.cc

Index: components/ntp_snippets/reading_list/reading_list_distillation_state_util.cc
diff --git a/components/ntp_snippets/reading_list/reading_list_distillation_state_util.cc b/components/ntp_snippets/reading_list/reading_list_distillation_state_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e7361ad130021f50bf2f4666572c3c32e8d713b0
--- /dev/null
+++ b/components/ntp_snippets/reading_list/reading_list_distillation_state_util.cc
@@ -0,0 +1,50 @@
+// 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/ntp_snippets/reading_list/reading_list_distillation_state_util.h"
+
+#include "base/logging.h"
+
+namespace ntp_snippets {
+
+ReadingListEntry::DistillationState ReadingListStateFromSuggestionState(
+    ReadingListSuggestionExtra::ReadingListSuggestionDistilledState
+        distilled_state) {
+  switch (distilled_state) {
+    case ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+        PENDING:
+      return ReadingListEntry::WAITING;
+    case ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+        SUCCESS:
+      return ReadingListEntry::PROCESSED;
+    case ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+        FAILURE:
+      return ReadingListEntry::DISTILLATION_ERROR;
+  }
+  NOTREACHED();
+  return ReadingListEntry::PROCESSING;
+}
+
+ReadingListSuggestionExtra::ReadingListSuggestionDistilledState
+SuggestionStateFromReadingListState(
+    ReadingListEntry::DistillationState distilled_state) {
+  switch (distilled_state) {
+    case ReadingListEntry::WILL_RETRY:
+    case ReadingListEntry::PROCESSING:
+    case ReadingListEntry::WAITING:
+      return ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+          PENDING;
+    case ReadingListEntry::PROCESSED:
+      return ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+          SUCCESS;
+    case ReadingListEntry::DISTILLATION_ERROR:
+      return ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+          FAILURE;
+  }
+  NOTREACHED();
+  return ReadingListSuggestionExtra::ReadingListSuggestionDistilledState::
+      PENDING;
+}
+
+}  // namespace ntp_snippets