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
16 #include "napi_observer.h"
17
18 #include "datashare_js_utils.h"
19 #include "datashare_log.h"
20
21 namespace OHOS {
22 namespace DataShare {
NapiObserver(napi_env env,napi_value callback)23 NapiObserver::NapiObserver(napi_env env, napi_value callback) : env_(env)
24 {
25 napi_create_reference(env, callback, 1, &ref_);
26 napi_get_uv_event_loop(env, &loop_);
27 }
28
CallbackFunc(uv_work_t * work,int status)29 void NapiObserver::CallbackFunc(uv_work_t *work, int status)
30 {
31 LOG_DEBUG("RdbObsCallbackFunc start");
32 std::shared_ptr<ObserverWorker> innerWorker(reinterpret_cast<ObserverWorker *>(work->data));
33 std::shared_ptr<NapiObserver> observer = innerWorker->observer_.lock();
34 if (observer == nullptr || observer->ref_ == nullptr) {
35 delete work;
36 LOG_ERROR("rdbObserver->ref_ is nullptr");
37 return;
38 }
39 napi_handle_scope scope = nullptr;
40 napi_open_handle_scope(observer->env_, &scope);
41 if (scope == nullptr) {
42 delete work;
43 return;
44 }
45 napi_value callback = nullptr;
46 napi_value param[2];
47 napi_value global = nullptr;
48 napi_value result;
49 napi_get_reference_value(observer->env_, observer->ref_, &callback);
50 napi_get_global(observer->env_, &global);
51 napi_get_undefined(observer->env_, ¶m[0]);
52 param[1] = innerWorker->getParam(observer->env_);
53 napi_status callStatus = napi_call_function(observer->env_, global, callback, 2, param, &result);
54 napi_close_handle_scope(observer->env_, scope);
55 if (callStatus != napi_ok) {
56 LOG_ERROR("napi_call_function failed status : %{public}d", callStatus);
57 }
58 delete work;
59 }
60
~NapiObserver()61 NapiObserver::~NapiObserver()
62 {
63 if (ref_ != nullptr) {
64 napi_delete_reference(env_, ref_);
65 ref_ = nullptr;
66 }
67 }
68
operator ==(const NapiObserver & rhs) const69 bool NapiObserver::operator==(const NapiObserver &rhs) const
70 {
71 if (ref_ == nullptr) {
72 return (rhs.ref_ == nullptr);
73 }
74
75 napi_value value1 = nullptr;
76 napi_get_reference_value(env_, ref_, &value1);
77
78 napi_value value2 = nullptr;
79 napi_get_reference_value(env_, rhs.ref_, &value2);
80
81 bool isEqual = false;
82 napi_strict_equals(env_, value1, value2, &isEqual);
83 return isEqual;
84 }
85
operator !=(const NapiObserver & rhs) const86 bool NapiObserver::operator!=(const NapiObserver &rhs) const
87 {
88 return !(rhs == *this);
89 }
90
OnChange(const RdbChangeNode & changeNode)91 void NapiRdbObserver::OnChange(const RdbChangeNode &changeNode)
92 {
93 LOG_DEBUG("NapiRdbObserver onchange Start");
94 if (ref_ == nullptr) {
95 LOG_ERROR("ref_ is nullptr");
96 return;
97 }
98 ObserverWorker *observerWorker = new (std::nothrow) ObserverWorker(shared_from_this());
99 if (observerWorker == nullptr) {
100 LOG_ERROR("Failed to create observerWorker");
101 return;
102 }
103 observerWorker->getParam = [changeNode](napi_env env) {
104 return DataShareJSUtils::Convert2JSValue(env, changeNode);
105 };
106
107 uv_work_t *work = new (std::nothrow) uv_work_t();
108 if (work == nullptr) {
109 delete observerWorker;
110 LOG_ERROR("Failed to create uv work");
111 return;
112 }
113 work->data = observerWorker;
114 int ret = uv_queue_work(
115 loop_, work, [](uv_work_t *work) {}, CallbackFunc);
116 if (ret != 0) {
117 LOG_ERROR("uv_queue_work failed");
118 delete observerWorker;
119 delete work;
120 }
121 }
122
OnChange(PublishedDataChangeNode & changeNode)123 void NapiPublishedObserver::OnChange(PublishedDataChangeNode &changeNode)
124 {
125 LOG_DEBUG("NapiPublishedObserver onchange Start");
126 if (ref_ == nullptr) {
127 LOG_ERROR("ref_ is nullptr");
128 return;
129 }
130 ObserverWorker *observerWorker = new (std::nothrow) ObserverWorker(shared_from_this());
131 if (observerWorker == nullptr) {
132 LOG_ERROR("Failed to create observerWorker");
133 return;
134 }
135 std::shared_ptr<PublishedDataChangeNode> node = std::make_shared<PublishedDataChangeNode>(std::move(changeNode));
136 observerWorker->getParam = [node](napi_env env) {
137 return DataShareJSUtils::Convert2JSValue(env, *node);
138 };
139
140 uv_work_t *work = new (std::nothrow) uv_work_t();
141 if (work == nullptr) {
142 delete observerWorker;
143 LOG_ERROR("Failed to create uv work");
144 return;
145 }
146 work->data = observerWorker;
147 int ret = uv_queue_work(
148 loop_, work, [](uv_work_t *work) {}, CallbackFunc);
149 if (ret != 0) {
150 LOG_ERROR("uv_queue_work failed");
151 delete observerWorker;
152 delete work;
153 }
154 }
155 } // namespace DataShare
156 } // namespace OHOS
157