1/*
2 * Copyright (c) 2023 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#include "ecmascript/base/path_helper.h"
16
17namespace panda::ecmascript::base {
18/*
19 * Before: ./xxx/../xxx/xxx/
20 * After:  xxx/xxx
21 */
22CString PathHelper::NormalizePath(const CString &fileName)
23{
24    if (fileName.empty() || (fileName.find(DOUBLE_SLASH_TAG) == CString::npos &&
25        fileName.find(CURRENT_DIREATORY_TAG) == CString::npos &&
26        fileName[fileName.size() - 1] != SLASH_TAG)) {
27        return fileName;
28    }
29    CString res = "";
30    size_t prev = 0;
31    size_t curr = fileName.find(SLASH_TAG);
32    CVector<CString> elems;
33    // eliminate parent directory path
34    while (curr != CString::npos) {
35        if (curr > prev) {
36            CString elem = fileName.substr(prev, curr - prev);
37            if (elem == DOUBLE_POINT_TAG && !elems.empty()) { // looking for xxx/../
38                elems.pop_back();
39            } else if (elem != POINT_STRING_TAG && elem != DOUBLE_POINT_TAG) { // remove ./ ../
40                elems.push_back(elem);
41            }
42        }
43        prev = curr + 1;
44        curr = fileName.find(SLASH_TAG, prev);
45    }
46    if (prev != fileName.size()) {
47        elems.push_back(fileName.substr(prev));
48    }
49    for (auto e : elems) {
50        if (res.size() == 0 && fileName.at(0) != SLASH_TAG) {
51            res.append(e);
52            continue;
53        }
54        res.append(1, SLASH_TAG).append(e);
55    }
56    return res;
57}
58
59/*
60 * Before: xxx/xxx
61 * After:  xxx/
62 */
63CString PathHelper::ResolveDirPath(const CString &fileName)
64{
65    // find last '/', '\\'
66    int foundPos = static_cast<int>(fileName.find_last_of("/\\"));
67    if (foundPos == -1) {
68        return CString();
69    }
70    return fileName.substr(0, foundPos + 1);
71}
72}  // namespace panda::ecmascript::base