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// Copyright 2018 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_tiles/custom_links_manager_impl.h"
#include <memory>
#include <string>
#include <utility>
#include "components/ntp_tiles/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
namespace ntp_tiles {
namespace {
const int kMaxNumLinks = 10;
} // namespace
CustomLinksManagerImpl::CustomLinksManagerImpl(PrefService* prefs)
: prefs_(prefs), store_(prefs), weak_ptr_factory_(this) {
DCHECK(prefs);
if (IsInitialized())
current_links_ = store_.RetrieveLinks();
}
CustomLinksManagerImpl::~CustomLinksManagerImpl() = default;
bool CustomLinksManagerImpl::Initialize(const NTPTilesVector& tiles) {
if (IsInitialized())
return false;
for (const NTPTile& tile : tiles)
current_links_.emplace_back(Link{tile.url, tile.title});
store_.StoreLinks(current_links_);
prefs_->SetBoolean(prefs::kCustomLinksInitialized, true);
return true;
}
void CustomLinksManagerImpl::Uninitialize() {
ClearLinks();
prefs_->SetBoolean(prefs::kCustomLinksInitialized, false);
}
bool CustomLinksManagerImpl::IsInitialized() const {
return prefs_->GetBoolean(prefs::kCustomLinksInitialized);
}
const std::vector<CustomLinksManager::Link>& CustomLinksManagerImpl::GetLinks()
const {
return current_links_;
}
bool CustomLinksManagerImpl::AddLink(const GURL& url,
const base::string16& title) {
if (!IsInitialized() || !url.is_valid() ||
current_links_.size() == kMaxNumLinks) {
return false;
}
if (FindLinkWithUrl(url) != current_links_.end())
return false;
previous_links_ = current_links_;
current_links_.emplace_back(Link{url, title});
store_.StoreLinks(current_links_);
return true;
}
bool CustomLinksManagerImpl::UpdateLink(const GURL& url,
const GURL& new_url,
const base::string16& new_title) {
if (!IsInitialized() || !url.is_valid() ||
(new_url.is_empty() && new_title.empty())) {
return false;
}
// Do not update if |new_url| is invalid or already exists in the list.
if (!new_url.is_empty() &&
(!new_url.is_valid() ||
FindLinkWithUrl(new_url) != current_links_.end())) {
return false;
}
auto it = FindLinkWithUrl(url);
if (it == current_links_.end())
return false;
// At this point, we will be modifying at least one of the values.
previous_links_ = current_links_;
if (!new_url.is_empty())
it->url = new_url;
if (!new_title.empty())
it->title = new_title;
store_.StoreLinks(current_links_);
return true;
}
bool CustomLinksManagerImpl::DeleteLink(const GURL& url) {
if (!IsInitialized() || !url.is_valid())
return false;
auto it = FindLinkWithUrl(url);
if (it == current_links_.end())
return false;
previous_links_ = current_links_;
current_links_.erase(it);
store_.StoreLinks(current_links_);
return true;
}
bool CustomLinksManagerImpl::UndoAction() {
if (!IsInitialized() || !previous_links_.has_value())
return false;
// Replace the current links with the previous state.
current_links_ = *previous_links_;
previous_links_ = base::nullopt;
store_.StoreLinks(current_links_);
return true;
}
void CustomLinksManagerImpl::ClearLinks() {
store_.ClearLinks();
current_links_.clear();
previous_links_ = base::nullopt;
}
std::vector<CustomLinksManager::Link>::iterator
CustomLinksManagerImpl::FindLinkWithUrl(const GURL& url) {
return std::find_if(current_links_.begin(), current_links_.end(),
[&url](const Link& link) { return link.url == url; });
}
// static
void CustomLinksManagerImpl::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* user_prefs) {
user_prefs->RegisterBooleanPref(prefs::kCustomLinksInitialized, false);
CustomLinksStore::RegisterProfilePrefs(user_prefs);
}
} // namespace ntp_tiles
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