[core] Add client defined network status

This API will let the client force a network status. If set
to Offline, we won't make network requests.

When set make to Online, it will trigger the pending requests
and try to fetch tiles from the network.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/mbgl/storage/network_status.cpp b/src/mbgl/storage/network_status.cpp
index 796cc5d27f..1ef5619bd6 100644
--- a/src/mbgl/storage/network_status.cpp
+++ b/src/mbgl/storage/network_status.cpp
@@ -9,9 +9,27 @@
 
 namespace mbgl {
 
+std::atomic<bool> NetworkStatus::online(true);
 std::mutex NetworkStatus::mtx;
 std::set<util::AsyncTask *> NetworkStatus::observers;
 
+NetworkStatus::Status NetworkStatus::Get() {
+    if (online) {
+        return Status::Online;
+    } else {
+        return Status::Offline;
+    }
+}
+
+void NetworkStatus::Set(Status status) {
+    if (status == Status::Online) {
+        online = true;
+        Reachable();
+    } else {
+        online = false;
+    }
+}
+
 void NetworkStatus::Subscribe(util::AsyncTask *async) {
     std::lock_guard<std::mutex> lock(NetworkStatus::mtx);
     observers.insert(async);
@@ -23,6 +41,10 @@ void NetworkStatus::Unsubscribe(util::AsyncTask *async) {
 }
 
 void NetworkStatus::Reachable() {
+    if (!online) {
+        return;
+    }
+
     std::lock_guard<std::mutex> lock(NetworkStatus::mtx);
     for (auto async : observers) {
         async->send();