Move C functions out of ContentSuggestionsMediator

ios/chrome/browser/content_suggestions/mediator_util.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_MEDIATOR_UTIL_H_
+#define IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_MEDIATOR_UTIL_H_
+
+#include "base/bind.h"
+#include "base/optional.h"
+#include "components/ntp_snippets/category_info.h"
+#include "components/ntp_snippets/content_suggestion.h"
+#include "components/ntp_snippets/status.h"
+#import "ios/chrome/browser/ui/content_suggestions/content_suggestion.h"
+#import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.h"
+
+namespace ntp_snippets {
+class ContentSuggestion;
+class Category;
+class CategoryInfo;
+}
+
+@class ContentSuggestionsCategoryWrapper;
+
+// TODO(crbug.com/701275): Once base::BindBlock supports the move semantics,
+// remove this wrapper.
+// Wraps a callback taking a const ref to a callback taking an object.
+void BindWrapper(
+    base::Callback<void(ntp_snippets::Status status_code,
+                        const std::vector<ntp_snippets::ContentSuggestion>&
+                            suggestions)> callback,
+    ntp_snippets::Status status_code,
+    std::vector<ntp_snippets::ContentSuggestion> suggestions);
+
+// Returns the Type for this |category|.
+ContentSuggestionType TypeForCategory(ntp_snippets::Category category);
+
+// Returns the section ID for this |category|.
+ContentSuggestionsSectionID SectionIDForCategory(
+    ntp_snippets::Category category);
+
+// Returns the section layout corresponding to the category |layout|.
+ContentSuggestionsSectionLayout SectionLayoutForLayout(
+    ntp_snippets::ContentSuggestionsCardLayout layout);
+
+// Converts a ntp_snippets::ContentSuggestion to an Objective-C
+// ContentSuggestion.
+ContentSuggestion* ConvertContentSuggestion(
+    const ntp_snippets::ContentSuggestion& contentSuggestion);
+
+// Returns a SectionInformation for a |category|, filled with the
+// |categoryInfo|.
+ContentSuggestionsSectionInformation* SectionInformationFromCategoryInfo(
+    const base::Optional<ntp_snippets::CategoryInfo>& categoryInfo,
+    const ntp_snippets::Category& category);
+
+// Returns a ntp_snippets::ID based on a Objective-C Category and the ID in the
+// category.
+ntp_snippets::ContentSuggestion::ID SuggestionIDForSectionID(
+    ContentSuggestionsCategoryWrapper* category,
+    const std::string& id_in_category);
+
+#endif  // IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_MEDIATOR_UTIL_H_