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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/wallpaper/wallpaper_enumerator.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "chrome/browser/ash/file_manager/path_util.h"
#include "chrome/browser/ash/file_manager/trash_common_util.h"
namespace {
constexpr char kPngFilePattern[] = "*.[pP][nN][gG]";
constexpr char kJpgFilePattern[] = "*.[jJ][pP][gG]";
constexpr char kJpegFilePattern[] = "*.[jJ][pP][eE][gG]";
constexpr int kMaximumImageCount = 1000;
void EnumerateFiles(const base::FilePath& path,
const std::vector<base::FilePath>& trash_paths,
const std::string& pattern,
std::vector<base::FilePath>* out) {
base::FileEnumerator image_enumerator(
path, /*recursive=*/true, base::FileEnumerator::FILES,
FILE_PATH_LITERAL(pattern),
base::FileEnumerator::FolderSearchPolicy::ALL);
for (base::FilePath image_path = image_enumerator.Next();
!image_path.empty() && out->size() < kMaximumImageCount;
image_path = image_enumerator.Next()) {
if (std::ranges::any_of(
trash_paths, [&image_path](const base::FilePath& trash_path) {
// Equivalent to
// image_path.value().starts_with(trash_path.value()).
return image_path.value().rfind(trash_path.value(), 0) == 0;
})) {
continue;
}
out->push_back(image_path);
}
}
// Looks up all the images in the |search_path| and excludes the ones that
// overlapse with |trash_paths|.
std::vector<base::FilePath> EnumerateAllImages(
const base::FilePath& search_path,
const std::vector<base::FilePath>& trash_paths,
const std::vector<std::string>& patterns) {
std::vector<base::FilePath> image_paths;
for (const auto& pattern : patterns) {
EnumerateFiles(search_path, trash_paths, pattern, &image_paths);
}
return image_paths;
}
} // namespace
namespace ash {
void EnumerateLocalWallpaperFiles(
Profile* profile,
base::OnceCallback<void(const std::vector<base::FilePath>&)> callback) {
const base::FilePath search_path =
file_manager::util::GetMyFilesFolderForProfile(profile);
const std::vector<std::string> search_patterns = {
kPngFilePattern, kJpgFilePattern, kJpegFilePattern};
std::vector<base::FilePath> trash_paths;
if (file_manager::trash::IsTrashEnabledForProfile(profile)) {
auto enabled_trash_locations =
file_manager::trash::GenerateEnabledTrashLocationsForProfile(profile);
for (const auto& it : enabled_trash_locations) {
base::FilePath trash_path =
it.first.Append(it.second.relative_folder_path);
trash_paths.emplace_back(trash_path);
}
}
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE,
{base::MayBlock(), base::TaskPriority::BEST_EFFORT,
base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN},
base::BindOnce(&EnumerateAllImages, search_path, trash_paths,
search_patterns),
std::move(callback));
}
} // namespace ash
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