1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16//! This file implements ce file operations.
17
18use asset_definition::{log_throw_error, ErrCode, Result};
19use std::{fs, path::Path};
20
21/// Suffix for backup database files.
22pub const BACKUP_SUFFIX: &str = ".backup";
23/// Suffix for database files.
24pub const DB_SUFFIX: &str = ".db";
25/// Name for data base key ciphertext file.
26pub const DB_KEY: &str = "db_key";
27/// Root path to de user directories.
28pub const DE_ROOT_PATH: &str = "data/service/el1/public/asset_service";
29/// Root path to ce user directories.
30pub const CE_ROOT_PATH: &str = "data/service/el2";
31
32/// Get all db name in user directory.
33pub(crate) fn get_user_dbs(path_str: &str) -> Result<Vec<String>> {
34    let mut dbs = vec![];
35    for db_path in fs::read_dir(path_str)? {
36        let db_path = db_path?;
37        let db_file_name = db_path.file_name().to_string_lossy().to_string();
38        if db_file_name.ends_with(DB_SUFFIX) {
39            dbs.push(db_file_name.strip_suffix(DB_SUFFIX).unwrap_or(&db_file_name).to_string())
40        }
41    }
42    Ok(dbs)
43}
44
45/// Check whether file exists.
46pub fn is_file_exist(path_str: &str) -> Result<bool> {
47    let path: &Path = Path::new(&path_str);
48    match path.try_exists() {
49        Ok(true) => Ok(true),
50        Ok(false) => Ok(false),
51        Err(e) => {
52            log_throw_error!(
53                ErrCode::FileOperationError,
54                "[FATAL][SA]]Checking existence of database key ciphertext file failed! error is [{}]",
55                e
56            )
57        },
58    }
59}
60