// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef IOS_CHROME_BROWSER_DISCOVER_FEED_MODEL_FEED_CONSTANTS_H_
#define IOS_CHROME_BROWSER_DISCOVER_FEED_MODEL_FEED_CONSTANTS_H_

#import <Foundation/Foundation.h>

// Enum representing the reasons why the feed would be started.
typedef NS_ENUM(NSUInteger, FeedStartReason) {
  FeedStartReasonLaunch = 0,
  FeedStartReasonAccountSwitch,
  FeedStartReasonUserRequested,
  FeedStartReasonOther,
};

// Enum representing the display strategy for reloads, indicating whether the
// content is served from the cache or the server.
typedef NS_ENUM(NSUInteger, FeedDisplayStrategy) {
  FeedDisplayStrategyServer = 0,
  FeedDisplayStrategyCache,
  FeedDisplayStrategyOther,
};

// Enum representing the different types of feed updates.
typedef NS_ENUM(NSInteger, FeedUpdateType) {
  FeedUpdateTypeDefault = 0,
  FeedUpdateTypeItemReloaded,
  FeedUpdateTypeBackgroundFetch,
  FeedUpdateTypeResumeFromBackground,
};

// Enum representing the different types of updates to the feed layout.
typedef NS_ENUM(NSInteger, FeedLayoutUpdateType) {
  FeedLayoutUpdateTypeUnknown = 0,
  FeedLayoutUpdateTypeAdd,
  FeedLayoutUpdateTypeDelete,
  FeedLayoutUpdateTypeReload,
};

/// Enums representing whether the user is eligible to view the feed, and if
/// not, why.
enum class DiscoverFeedEligibility {
  /// User is eligible for the Discover feed.
  kEligible,
  /// Feed is ineligible for an unknown reason.
  kIneligibleReasonUnknown,
  /// Feed is ineligible because a managed account is being used, and feed is
  /// not allowed by enterprise settings.
  kDisabledByEnterprisePolicy,
};

// The user defaults key indicating if the user has ever engaged with a feed.
extern NSString* const kEngagedWithFeedKey;

#endif  // IOS_CHROME_BROWSER_DISCOVER_FEED_MODEL_FEED_CONSTANTS_H_