Create ReadingListSuggestionsProvider

components/ntp_snippets/ios/reading_list_suggestions_provider.cc

Index: components/ntp_snippets/ios/reading_list_suggestions_provider.cc
diff --git a/components/ntp_snippets/ios/reading_list_suggestions_provider.cc b/components/ntp_snippets/ios/reading_list_suggestions_provider.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5f7182bd28442412a9b08552b465272f97591352
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+++ b/components/ntp_snippets/ios/reading_list_suggestions_provider.cc
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+// 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/ios/reading_list_suggestions_provider.h"
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "components/ntp_snippets/category.h"
+#include "components/reading_list/ios/reading_list_entry.h"
+#include "components/reading_list/ios/reading_list_model.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ntp_snippets {
+
+ReadingListSuggestionsProvider::ReadingListSuggestionsProvider(
+    ContentSuggestionsProvider::Observer* observer,
+    ReadingListModel* reading_list_model)
+    : ContentSuggestionsProvider(observer),
+      category_status_(CategoryStatus::AVAILABLE_LOADING),
+      provided_category_(
+          Category::FromKnownCategory(KnownCategories::READING_LIST)),
+      reading_list_model_(reading_list_model) {
+  observer->OnCategoryStatusChanged(this, provided_category_, category_status_);
+  reading_list_model->AddObserver(this);
+  if (reading_list_model_->loaded()) {
+    FetchReadingListInternal();
+  }
+}
+
+ReadingListSuggestionsProvider::~ReadingListSuggestionsProvider() {
+  reading_list_model_->RemoveObserver(this);
+}
+
+CategoryStatus ReadingListSuggestionsProvider::GetCategoryStatus(
+    Category category) {
+  DCHECK_EQ(category, provided_category_);
+  return category_status_;
+};
+
+CategoryInfo ReadingListSuggestionsProvider::GetCategoryInfo(
+    Category category) {
+  DCHECK_EQ(category, provided_category_);
+
+  return CategoryInfo(l10n_util::GetStringUTF16(
+                          IDS_NTP_READING_LIST_SUGGESTIONS_SECTION_HEADER),
+                      ContentSuggestionsCardLayout::FULL_CARD,
+                      ContentSuggestionsAdditionalAction::VIEW_ALL,
+                      /*show_if_empty=*/false,
+                      l10n_util::GetStringUTF16(
+                          IDS_NTP_READING_LIST_SUGGESTIONS_SECTION_EMPTY));
+};
+
+void ReadingListSuggestionsProvider::DismissSuggestion(
+    const ContentSuggestion::ID& suggestion_id){
+    // TODO(crbug.com/702241): Implement this method.
+};
+void ReadingListSuggestionsProvider::FetchSuggestionImage(
+    const ContentSuggestion::ID& suggestion_id,
+    const ImageFetchedCallback& callback){
+    // TODO(crbug.com/702241): Implement this method.
+};
+
+void ReadingListSuggestionsProvider::Fetch(
+    const Category& category,
+    const std::set<std::string>& known_suggestion_ids,
+    const FetchDoneCallback& callback) {
+  LOG(DFATAL) << "ReadingListSuggestionsProvider has no |Fetch| functionality!";
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE,
+      base::Bind(callback,
+                 Status(StatusCode::PERMANENT_ERROR,
+                        "ReadingListSuggestionsProvider has no |Fetch| "
+                        "functionality!"),
+                 base::Passed(std::vector<ContentSuggestion>())));
+};
+
+void ReadingListSuggestionsProvider::ClearHistory(
+    base::Time begin,
+    base::Time end,
+    const base::Callback<bool(const GURL& url)>& filter){
+    // TODO(crbug.com/702241): Implement this method.
+};
+
+void ReadingListSuggestionsProvider::ClearCachedSuggestions(Category category) {
+  DCHECK_EQ(category, provided_category_);
+  // Ignored.
+};
+
+void ReadingListSuggestionsProvider::GetDismissedSuggestionsForDebugging(
+    Category category,
+    const DismissedSuggestionsCallback& callback){
+    // TODO(crbug.com/702241): Implement this method.
+};
+void ReadingListSuggestionsProvider::ClearDismissedSuggestionsForDebugging(
+    Category category){
+    // TODO(crbug.com/702241): Implement this method.
+};
+
+void ReadingListSuggestionsProvider::ReadingListModelLoaded(
+    const ReadingListModel* model) {
+  DCHECK(model == reading_list_model_);
+  FetchReadingListInternal();
+}
+
+void ReadingListSuggestionsProvider::FetchReadingListInternal() {
+  // TODO(crbug.com/702241): Implement this method.
+}
+
+}  // namespace ntp_snippets