1 /*
2 * Copyright (c) 2021-2025 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 #include "open_dir.h"
17
18 #include <memory>
19 #include <string>
20 #include <tuple>
21
22 #include "class_dir/dir_entity.h"
23 #include "class_dir/dir_n_exporter.h"
24 #include "n_async_work_callback.h"
25 #include "n_async_work_promise.h"
26 #include "n_class.h"
27 #include "n_func_arg.h"
28 #include "n_val.h"
29 #include "uni_error.h"
30
31 namespace OHOS {
32 namespace DistributedFS {
33 namespace ModuleFileIO {
34 using namespace std;
35
Sync(napi_env env,napi_callback_info info)36 napi_value OpenDir::Sync(napi_env env, napi_callback_info info)
37 {
38 NFuncArg funcArg(env, info);
39 if (!funcArg.InitArgs(NARG_CNT::ONE)) {
40 return nullptr;
41 }
42
43 auto [resGetFirstArg, path, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
44 if (!resGetFirstArg) {
45 UniError(EINVAL).ThrowErr(env, "Invalid path");
46 return nullptr;
47 }
48
49 std::unique_ptr<DIR, std::function<void(DIR *)>> dir = { opendir(path.get()), closedir };
50 if (dir == nullptr) {
51 UniError(errno).ThrowErr(env);
52 return nullptr;
53 }
54
55 napi_value objDir = NClass::InstantiateClass(env, DirNExporter::className_, {});
56 if (objDir == nullptr) {
57 UniError(EINVAL).ThrowErr(env, "Cannot instantiate class DirSync");
58 return nullptr;
59 }
60
61 auto dirEntity = NClass::GetEntityOf<DirEntity>(env, objDir);
62 if (dirEntity == nullptr) {
63 UniError(EINVAL).ThrowErr(env, "Cannot get the entity of objDir");
64 return nullptr;
65 }
66
67 dirEntity->dir_.swap(dir);
68 return objDir;
69 }
70
71 struct OpenDirArgs {
72 NRef dirPtr_;
73 DIR *dir = nullptr;
OpenDirArgsOHOS::DistributedFS::ModuleFileIO::OpenDirArgs74 explicit OpenDirArgs(NVal dirPtr) : dirPtr_(dirPtr) {}
75 ~OpenDirArgs() = default;
76 };
77
Async(napi_env env,napi_callback_info info)78 napi_value OpenDir::Async(napi_env env, napi_callback_info info)
79 {
80 NFuncArg funcArg(env, info);
81 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::TWO)) {
82 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
83 return nullptr;
84 }
85
86 auto [resGetFirstArg, tmp, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
87 if (!resGetFirstArg) {
88 UniError(EINVAL).ThrowErr(env, "Invalid path");
89 return nullptr;
90 }
91
92 string path = tmp.get();
93 auto arg = make_shared<OpenDirArgs>(NVal(env, funcArg.GetThisVar()));
94 auto cbExec = [arg, path](napi_env env) -> UniError {
95 DIR *dir = nullptr;
96 dir = opendir(path.c_str());
97 if (dir == nullptr) {
98 return UniError(errno);
99 }
100 arg->dir = dir;
101 return UniError(ERRNO_NOERR);
102 };
103
104 auto cbCompl = [arg](napi_env env, UniError err) -> NVal {
105 if (err) {
106 return { env, err.GetNapiErr(env) };
107 }
108 std::unique_ptr<DIR, std::function<void(DIR *)>> dir = { arg->dir, closedir };
109 if (!dir) {
110 return { env, UniError(errno).GetNapiErr(env) };
111 }
112
113 napi_value objDir = NClass::InstantiateClass(env, DirNExporter::className_, {});
114 if (!objDir) {
115 return { env, UniError(EINVAL).GetNapiErr(env) };
116 }
117
118 auto dirEntity = NClass::GetEntityOf<DirEntity>(env, objDir);
119 if (!dirEntity) {
120 return { env, UniError(EINVAL).GetNapiErr(env) };
121 }
122 dirEntity->dir_.swap(dir);
123 return { env, objDir };
124 };
125
126 NVal thisVar(env, funcArg.GetThisVar());
127 if (funcArg.GetArgc() == NARG_CNT::ONE) {
128 return NAsyncWorkPromise(env, thisVar).Schedule("fileIOOpenDir", cbExec, cbCompl).val_;
129 } else {
130 NVal cb(env, funcArg[NARG_POS::SECOND]);
131 return NAsyncWorkCallback(env, thisVar, cb).Schedule("fileIOOpenDir", cbExec, cbCompl).val_;
132 }
133 }
134 } // namespace ModuleFileIO
135 } // namespace DistributedFS
136 } // namespace OHOS