Display offline availability on ContentSuggestions

ios/chrome/browser/content_suggestions/content_suggestions_mediator.mm

 // 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.
 
 #import "ios/chrome/browser/content_suggestions/content_suggestions_mediator.h"
 
 #include "base/mac/bind_objc_block.h"
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/favicon/core/large_icon_service.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_snippets/category_info.h"
 #include "components/ntp_snippets/content_suggestion.h"
+#include "components/ntp_snippets/reading_list/reading_list_distillation_state_util.h"
 #import "ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h"
 #import "ios/chrome/browser/content_suggestions/content_suggestions_service_bridge_observer.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestion.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_data_sink.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_image_fetcher.h"
 #import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestion_identifier.h"
 #import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.h"
 #import "ios/chrome/browser/ui/favicon/favicon_attributes_provider.h"
+#import "ios/chrome/browser/ui/reading_list/reading_list_collection_view_item.h"
+#import "ios/chrome/browser/ui/reading_list/reading_list_utils.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/gfx/image/image.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
@@ skipping 326 matching lines @@
   }
 
   for (auto& contentSuggestion : suggestions) {
     ContentSuggestion* suggestion = ConvertContentSuggestion(contentSuggestion);
 
     suggestion.type = TypeForCategory(category);
 
     suggestion.suggestionIdentifier.sectionInfo =
         self.sectionInformationByCategory[categoryWrapper];
 
+    if (category.IsKnownCategory(ntp_snippets::KnownCategories::READING_LIST)) {
+      ReadingListUIDistillationStatus status =
+          UIStatusFromModelStatus(ReadingListStateFromSuggestionState(

[Olivier, 2017/04/05 13:45:22]

IIUC, UIStatusFromModelStatus will be a really common name.
it should be renamed ReadingListUIStatusFromModelStatus or moved to a
reading_list namespace.

[gambard, 2017/04/06 09:28:50]

Done.

+              contentSuggestion.reading_list_suggestion_extra()
+                  ->distilled_state));

[Olivier, 2017/04/05 14:03:44]

I think the real problem (that confuses me most) is not the existence of
UIStatusFromModelStatus but the existence of ReadingListSuggestionDistilledState
which was discussed in the previous CL.
So this is out of the scope of this CL and this is fine here.

[gambard, 2017/04/06 09:28:50]

Acknowledged.

+      suggestion.readingListExtra =
+          [ContentSuggestionReadingListExtra extraWithStatus:status];
+    }
+
     [contentArray addObject:suggestion];
   }
 
   if (suggestions.size() == 0) {
     ContentSuggestion* suggestion = [[ContentSuggestion alloc] init];
     suggestion.type = ContentSuggestionTypeEmpty;
     suggestion.suggestionIdentifier =
         [[ContentSuggestionIdentifier alloc] init];
     suggestion.suggestionIdentifier.sectionInfo =
         self.sectionInformationByCategory[categoryWrapper];
@@ skipping 30 matching lines @@
         [NSMutableArray array];
     ntp_snippets::Category category = suggestions[0].id().category();
     [self addSuggestions:suggestions
             fromCategory:category
                  toArray:contentSuggestions];
     callback(contentSuggestions);
   }
 }
 
 @end