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 "create_stream.h"
17
18 #include <memory>
19 #include <tuple>
20
21 #include "class_stream/stream_entity.h"
22 #include "class_stream/stream_n_exporter.h"
23 #include "n_async_work_callback.h"
24 #include "n_async_work_promise.h"
25 #include "n_class.h"
26 #include "n_func_arg.h"
27 #include "n_val.h"
28 #include "uni_error.h"
29
30 namespace OHOS {
31 namespace DistributedFS {
32 namespace ModuleFileIO {
33 using namespace std;
34
InstantiateStream(napi_env env,unique_ptr<FILE,decltype(& fclose) > fp)35 static NVal InstantiateStream(napi_env env, unique_ptr<FILE, decltype(&fclose)> fp)
36 {
37 napi_value objStream = NClass::InstantiateClass(env, StreamNExporter::className_, {});
38 if (!objStream) {
39 UniError(EIO).ThrowErr(env, "INNER BUG. Cannot instantiate stream");
40 return NVal();
41 }
42
43 auto streamEntity = NClass::GetEntityOf<StreamEntity>(env, objStream);
44 if (!streamEntity) {
45 UniError(EIO).ThrowErr(env, "Cannot instantiate stream because of void entity");
46 return NVal();
47 }
48
49 streamEntity->fp.swap(fp);
50 return { env, objStream };
51 }
52
GetCreateStreamArgs(napi_env env,const NFuncArg & funcArg)53 static tuple<bool, string, string> GetCreateStreamArgs(napi_env env, const NFuncArg &funcArg)
54 {
55 auto [resGetFirstArg, path, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
56 if (!resGetFirstArg) {
57 UniError(EINVAL).ThrowErr(env, "Invalid path");
58 return { false, "", "" };
59 }
60
61 auto [resGetSecondArg, mode, useless] = NVal(env, funcArg[NARG_POS::SECOND]).ToUTF8String();
62 if (!resGetSecondArg) {
63 UniError(EINVAL).ThrowErr(env, "Invalid mode");
64 return { false, "", "" };
65 }
66
67 return { true, path.get(), mode.get() };
68 }
69
Sync(napi_env env,napi_callback_info info)70 napi_value CreateStream::Sync(napi_env env, napi_callback_info info)
71 {
72 NFuncArg funcArg(env, info);
73 if (!funcArg.InitArgs(NARG_CNT::TWO)) {
74 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
75 return nullptr;
76 }
77
78 auto [resGetCreateStreamArgs, argPath, argMode] = GetCreateStreamArgs(env, funcArg);
79 if (!resGetCreateStreamArgs) {
80 return nullptr;
81 }
82
83 unique_ptr<FILE, decltype(&fclose)> fp = { fopen(argPath.c_str(), argMode.c_str()), fclose };
84 if (!fp) {
85 UniError(errno).ThrowErr(env);
86 return nullptr;
87 }
88
89 return InstantiateStream(env, move(fp)).val_;
90 }
91
92 struct AsyncCreateStreamArg {
93 unique_ptr<FILE, decltype(&fclose)> fp = { nullptr, fclose };
94 };
95
Async(napi_env env,napi_callback_info info)96 napi_value CreateStream::Async(napi_env env, napi_callback_info info)
97 {
98 NFuncArg funcArg(env, info);
99 if (!funcArg.InitArgs(NARG_CNT::TWO, NARG_CNT::THREE)) {
100 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
101 return nullptr;
102 }
103
104 auto [resGetCreateStreamArgs, argPath, argMode] = GetCreateStreamArgs(env, funcArg);
105 if (!resGetCreateStreamArgs) {
106 return nullptr;
107 }
108
109 auto arg = make_shared<AsyncCreateStreamArg>();
110 auto cbExec = [arg, argPath = move(argPath), argMode = move(argMode)](napi_env env) -> UniError {
111 arg->fp = { fopen(argPath.c_str(), argMode.c_str()), fclose };
112 if (!arg->fp) {
113 return UniError(errno);
114 } else {
115 return UniError(ERRNO_NOERR);
116 }
117 };
118
119 auto cbCompl = [arg](napi_env env, UniError err) -> NVal {
120 if (err) {
121 return { env, err.GetNapiErr(env) };
122 }
123 return InstantiateStream(env, move(arg->fp));
124 };
125
126 const string procedureName = "FileIOCreateStream";
127 NVal thisVar(env, funcArg.GetThisVar());
128 if (funcArg.GetArgc() == NARG_CNT::TWO) {
129 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
130 } else {
131 NVal cb(env, funcArg[NARG_POS::THIRD]);
132 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
133 }
134 }
135 } // namespace ModuleFileIO
136 } // namespace DistributedFS
137 } // namespace OHOS