bluetooth: mac: Initial BluetoothRemoteGattCharacteristicMac implementation

device/bluetooth/bluetooth_remote_gatt_service_mac.mm

Index: device/bluetooth/bluetooth_remote_gatt_service_mac.mm
diff --git a/device/bluetooth/bluetooth_remote_gatt_service_mac.mm b/device/bluetooth/bluetooth_remote_gatt_service_mac.mm
index 2e840703e40d32391166aa9f42ca0fcaa277b2ab..f2b17d755817bba373126509a1639043655c2d41 100644
--- a/device/bluetooth/bluetooth_remote_gatt_service_mac.mm
+++ b/device/bluetooth/bluetooth_remote_gatt_service_mac.mm
@@ -8,8 +8,10 @@
 #include <vector>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "device/bluetooth/bluetooth_adapter_mac.h"
 #include "device/bluetooth/bluetooth_low_energy_device_mac.h"
+#include "device/bluetooth/bluetooth_remote_gatt_characteristic_mac.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 
 namespace device {
@@ -20,7 +22,8 @@ BluetoothRemoteGattServiceMac::BluetoothRemoteGattServiceMac(
     bool is_primary)
     : bluetooth_device_mac_(bluetooth_device_mac),
       service_(service, base::scoped_policy::RETAIN),
-      is_primary_(is_primary) {
+      is_primary_(is_primary),
+      is_discovery_complete_(false) {
   uuid_ = BluetoothAdapterMac::BluetoothUUIDWithCBUUID([service_.get() UUID]);
   identifier_ =
       [NSString stringWithFormat:@"%s-%p", uuid_.canonical_value().c_str(),
@@ -48,8 +51,13 @@ BluetoothDevice* BluetoothRemoteGattServiceMac::GetDevice() const {
 
 std::vector<BluetoothRemoteGattCharacteristic*>
 BluetoothRemoteGattServiceMac::GetCharacteristics() const {
-  NOTIMPLEMENTED();
-  return std::vector<BluetoothRemoteGattCharacteristic*>();
+  std::vector<BluetoothRemoteGattCharacteristic*> gatt_characteristics;
+  for (const auto& iter : gatt_characteristic_macs_) {
+    BluetoothRemoteGattCharacteristic* gatt_characteristic =
+        static_cast<BluetoothRemoteGattCharacteristic*>(iter.second.get());
+    gatt_characteristics.push_back(gatt_characteristic);
+  }
+  return gatt_characteristics;
 }
 
 std::vector<BluetoothRemoteGattService*>
@@ -61,12 +69,88 @@ BluetoothRemoteGattServiceMac::GetIncludedServices() const {
 BluetoothRemoteGattCharacteristic*
 BluetoothRemoteGattServiceMac::GetCharacteristic(
     const std::string& identifier) const {
-  NOTIMPLEMENTED();
-  return nullptr;
+  auto searched_pair = gatt_characteristic_macs_.find(identifier);
+  if (searched_pair == gatt_characteristic_macs_.end()) {
+    return nullptr;
+  }
+  return static_cast<BluetoothRemoteGattCharacteristic*>(
+      searched_pair->second.get());
+}
+
+void BluetoothRemoteGattServiceMac::DiscoverCharacteristics() {
+  is_discovery_complete_ = false;
+  [GetCBPeripheral() discoverCharacteristics:nil forService:GetService()];
+}
+
+void BluetoothRemoteGattServiceMac::DidDiscoverCharacteristics() {
+  DCHECK(!is_discovery_complete_);
+  std::unordered_set<std::string> characteristic_identifier_to_remove;
+  for (const auto& iter : gatt_characteristic_macs_) {
+    characteristic_identifier_to_remove.insert(iter.first);
+  }
+
+  for (CBCharacteristic* cb_characteristic in GetService().characteristics) {
+    BluetoothRemoteGattCharacteristicMac* gatt_characteristic_mac =
+        GetBluetoothRemoteGattCharacteristicMac(cb_characteristic);
+    if (gatt_characteristic_mac) {
+      const std::string& identifier = gatt_characteristic_mac->GetIdentifier();
+      characteristic_identifier_to_remove.erase(identifier);
+      continue;
+    }
+    gatt_characteristic_mac =
+        new BluetoothRemoteGattCharacteristicMac(this, cb_characteristic);
+    const std::string& identifier = gatt_characteristic_mac->GetIdentifier();
+    auto result_iter = gatt_characteristic_macs_.insert(
+        {identifier, base::WrapUnique(gatt_characteristic_mac)});
+    DCHECK(result_iter.second);
+    GetMacAdapter()->NotifyGattCharacteristicAdded(gatt_characteristic_mac);
+  }
+
+  for (const std::string& identifier : characteristic_identifier_to_remove) {
+    auto pair_to_remove = gatt_characteristic_macs_.find(identifier);
+    std::unique_ptr<BluetoothRemoteGattCharacteristicMac>
+        characteristic_to_remove;
+    pair_to_remove->second.swap(characteristic_to_remove);
+    gatt_characteristic_macs_.erase(pair_to_remove);
+    GetMacAdapter()->NotifyGattCharacteristicRemoved(
+        characteristic_to_remove.get());
+  }
+  is_discovery_complete_ = true;
+  GetMacAdapter()->NotifyGattServiceChanged(this);
+}
+
+bool BluetoothRemoteGattServiceMac::IsDiscoveryComplete() {
+  return is_discovery_complete_;
+}
+
+BluetoothAdapterMac* BluetoothRemoteGattServiceMac::GetMacAdapter() const {
+  return bluetooth_device_mac_->GetMacAdapter();
+}
+
+CBPeripheral* BluetoothRemoteGattServiceMac::GetCBPeripheral() const {
+  return bluetooth_device_mac_->GetPeripheral();
 }
 
 CBService* BluetoothRemoteGattServiceMac::GetService() const {
   return service_.get();
 }
 
+BluetoothRemoteGattCharacteristicMac*
+BluetoothRemoteGattServiceMac::GetBluetoothRemoteGattCharacteristicMac(
+    CBCharacteristic* characteristic) const {
+  auto found = std::find_if(
+      gatt_characteristic_macs_.begin(), gatt_characteristic_macs_.end(),
+      [characteristic](
+          const std::pair<
+              const std::string,
+              std::unique_ptr<BluetoothRemoteGattCharacteristicMac>>& pair) {
+        return pair.second->GetCBCharacteristic() == characteristic;
+      });
+  if (found == gatt_characteristic_macs_.end()) {
+    return nullptr;
+  } else {
+    return found->second.get();
+  }
+}
+
 }  // namespace device