From 6d4f7087229c1379ecb2e551e4db49576a67753a Mon Sep 17 00:00:00 2001
From: Prerak Mann <mannprerak2@gmail.com>
Date: Sat, 11 May 2019 02:48:45 +0530
Subject: [PATCH] added askpermission and partial startAdvertising methods

---
 .../NearbyConnectionsPlugin.java              | 78 ++++++++++++++++++-
 .../android/app/src/main/AndroidManifest.xml  |  8 +-
 example/lib/main.dart                         | 23 +++++-
 example/pubspec.yaml                          |  1 -
 lib/nearby_connections.dart                   | 36 +++++++++
 5 files changed, 141 insertions(+), 5 deletions(-)

diff --git a/android/src/main/java/com/pkmnapps/nearby_connections/NearbyConnectionsPlugin.java b/android/src/main/java/com/pkmnapps/nearby_connections/NearbyConnectionsPlugin.java
index 6a40035..e2a4359 100644
--- a/android/src/main/java/com/pkmnapps/nearby_connections/NearbyConnectionsPlugin.java
+++ b/android/src/main/java/com/pkmnapps/nearby_connections/NearbyConnectionsPlugin.java
@@ -7,14 +7,26 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.provider.Settings;
+import android.support.annotation.NonNull;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
 import android.util.Log;
 
+import com.google.android.gms.nearby.Nearby;
+import com.google.android.gms.nearby.connection.AdvertisingOptions;
+import com.google.android.gms.nearby.connection.ConnectionInfo;
+import com.google.android.gms.nearby.connection.ConnectionLifecycleCallback;
+import com.google.android.gms.nearby.connection.ConnectionResolution;
+import com.google.android.gms.nearby.connection.PayloadTransferUpdate;
+import com.google.android.gms.nearby.connection.Strategy;
+import com.google.android.gms.tasks.OnFailureListener;
+import com.google.android.gms.tasks.OnSuccessListener;
+
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
+import io.flutter.plugin.common.PluginRegistry;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 
 /**
@@ -22,6 +34,8 @@ import io.flutter.plugin.common.PluginRegistry.Registrar;
  */
 public class NearbyConnectionsPlugin implements MethodCallHandler {
     private Activity activity;
+    private static final String SERVICE_ID = "PKMNAPPS_NEARBY_CONNECTION";
+
 
     private NearbyConnectionsPlugin(Activity activity) {
         this.activity = activity;
@@ -38,7 +52,7 @@ public class NearbyConnectionsPlugin implements MethodCallHandler {
     }
 
     @Override
-    public void onMethodCall(MethodCall call, Result result) {
+    public void onMethodCall(MethodCall call, final Result result) {
 
         switch (call.method) {
             case "checkPermissions":
@@ -49,10 +63,72 @@ public class NearbyConnectionsPlugin implements MethodCallHandler {
                 } else {
                     result.success(true);
                 }
+                break;
+            case "askPermissions":
+                ActivityCompat.requestPermissions(activity,
+                        new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
+                        0);
+                result.success(null);
+                break;
+            case "stopAdvertising":
+                Nearby.getConnectionsClient(activity).stopAdvertising();
+                result.success(null);
+                break;
+            case "startAdvertising":
+                String userNickName = (String) call.argument("userNickName");
+                int strategy = (int) call.argument("strategy");
+
+                assert userNickName != null;
+                Nearby.getConnectionsClient(activity).startAdvertising(
+                        userNickName,
+                        SERVICE_ID,
+                        connectionLifecycleCallback,
+                        new AdvertisingOptions.Builder().setStrategy(getStrategy(strategy)).build())
+                        .addOnSuccessListener(new OnSuccessListener<Void>() {
+                            @Override
+                            public void onSuccess(Void aVoid) {
+                                result.success(true);
+                            }
+                        })
+                        .addOnFailureListener(new OnFailureListener() {
+                            @Override
+                            public void onFailure(@NonNull Exception e) {
+                                result.error("Failure", e.getMessage(), null);
+                            }
+                        });
+
                 break;
             default:
                 result.notImplemented();
         }
+    }
 
+    private final ConnectionLifecycleCallback connectionLifecycleCallback = new ConnectionLifecycleCallback() {
+        @Override
+        public void onConnectionInitiated(@NonNull String s, @NonNull ConnectionInfo connectionInfo) {
+
+        }
+
+        @Override
+        public void onConnectionResult(@NonNull String s, @NonNull ConnectionResolution connectionResolution) {
+        }
+
+        @Override
+        public void onDisconnected(@NonNull String s) {
+
+        }
+    };
+
+    private Strategy getStrategy(int strategy) {
+        switch (strategy) {
+            case 0:
+                return Strategy.P2P_CLUSTER;
+            case 1:
+                return Strategy.P2P_STAR;
+            case 2:
+                return Strategy.P2P_POINT_TO_POINT;
+            default:
+                return Strategy.P2P_CLUSTER;
+        }
     }
 }
diff --git a/example/android/app/src/main/AndroidManifest.xml b/example/android/app/src/main/AndroidManifest.xml
index dbc751e..da157b9 100644
--- a/example/android/app/src/main/AndroidManifest.xml
+++ b/example/android/app/src/main/AndroidManifest.xml
@@ -1,6 +1,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.pkmnapps.nearby_connections_example">
-
+<!-- Required for Nearby Connections -->
+<uses-permission android:name="android.permission.BLUETOOTH" />
+<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <!-- io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
          In most cases you can leave this as-is, but you if you want to provide
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 5171da1..4979035 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -52,8 +52,27 @@ class _MyBodyState extends State<Body> {
           RaisedButton(
             child: Text("askPermission(permission handler)"),
             onPressed: () async {
-              // await PermissionHandler()
-              //     .requestPermissions([PermissionGroup.location]);
+              await Nearby.instance.askPermission();
+            },
+          ),
+          RaisedButton(
+            child: Text("Start Advertising"),
+            onPressed: () async {
+              try {
+                bool a = await Nearby.instance
+                    .startAdvertising("pkmn", STRATEGY.P2P_STAR);
+                Scaffold.of(context)
+                    .showSnackBar(SnackBar(content: Text(a.toString())));
+              } catch (exception) {
+                Scaffold.of(context).showSnackBar(
+                    SnackBar(content: Text(exception.toString())));
+              }
+            },
+          ),
+          RaisedButton(
+            child: Text("Stop Advertising"),
+            onPressed: () async {
+              await Nearby.instance.stopAdvertising();
             },
           ),
         ],
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 046513b..01c5a7f 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -8,7 +8,6 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^0.1.2
diff --git a/lib/nearby_connections.dart b/lib/nearby_connections.dart
index 31e8319..fd33561 100644
--- a/lib/nearby_connections.dart
+++ b/lib/nearby_connections.dart
@@ -2,6 +2,9 @@ import 'dart:async';
 
 import 'package:flutter/services.dart';
 
+enum STRATEGY { P2P_CLUSTER, P2P_STAR, P2P_POINT_TO_POINT }
+enum Status { NONE, SUCCESS, FAILURE, IN_PROGRESS, CANCELED }
+
 class Nearby {
   //for maintaining only 1 instance of this class
   static final Nearby _instance = Nearby._();
@@ -14,4 +17,37 @@ class Nearby {
   Future<bool> checkPermissions() async => await _channel.invokeMethod(
         'checkPermissions',
       );
+
+  Future<void> askPermission() async {
+    await _channel.invokeMethod(
+      'askPermissions',
+    );
+  }
+
+  Future<bool> startAdvertising(String userNickName, STRATEGY strategy) async {
+    assert(userNickName != null && strategy != null);
+
+    return await _channel.invokeMethod('startAdvertising', <String, dynamic>{
+      'userNickName': userNickName,
+      'strategy': strategy.index
+    });
+  }
+
+  Future<void> stopAdvertising() async {
+    await _channel.invokeMethod('stopAdvertising');
+  }
+}
+
+abstract class ConnectionLifecycleCallback {
+  void onConnectionInitiated(String s, ConnectionInfo connectionInfo);
+  void onConnectionResult(String s, Status status);
+  void onDisconnected(String s) {}
+}
+
+class ConnectionInfo {
+  String endPointName, authenticationToken;
+  bool isIncomingConnection;
+
+  ConnectionInfo(
+      this.endPointName, this.authenticationToken, this.isIncomingConnection);
 }