Config/Interface/Peer: Make Parcelable

This allows saving the editor state across restarts.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/java/com/wireguard/config/Peer.java

@@ -3,6 +3,8 @@ package com.wireguard.config;
 import android.databinding.BaseObservable;
 import android.databinding.Bindable;
 import android.databinding.Observable;
+import android.os.Parcel;
+import android.os.Parcelable;
 
 import com.android.databinding.library.baseAdapters.BR;
 
@@ -10,7 +12,19 @@ import com.android.databinding.library.baseAdapters.BR;
  * Represents the configuration for a WireGuard peer (a [Peer] block).
  */
 
-public class Peer extends BaseObservable implements Copyable<Peer>, Observable {
+public class Peer extends BaseObservable implements Copyable<Peer>, Observable, Parcelable {
+    public static final Parcelable.Creator<Peer> CREATOR = new Parcelable.Creator<Peer>() {
+        @Override
+        public Peer createFromParcel(final Parcel in) {
+            return new Peer(in);
+        }
+
+        @Override
+        public Peer[] newArray(final int size) {
+            return new Peer[size];
+        }
+    };
+
     private String allowedIPs;
     private final Config config;
     private String endpoint;
@@ -21,6 +35,14 @@ public class Peer extends BaseObservable implements Copyable<Peer>, Observable {
         this.config = config;
     }
 
+    protected Peer(final Parcel in) {
+        allowedIPs = in.readString();
+        config = null;
+        endpoint = in.readString();
+        persistentKeepalive = in.readString();
+        publicKey = in.readString();
+    }
+
     @Override
     public Peer copy() {
         return copy(config);
@@ -41,6 +63,11 @@ public class Peer extends BaseObservable implements Copyable<Peer>, Observable {
         notifyChange();
     }
 
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
     @Bindable
     public String getAllowedIPs() {
         return allowedIPs;
@@ -120,4 +147,12 @@ public class Peer extends BaseObservable implements Copyable<Peer>, Observable {
             sb.append(Attribute.PUBLIC_KEY.composeWith(publicKey));
         return sb.toString();
     }
+
+    @Override
+    public void writeToParcel(final Parcel dest, final int flags) {
+        dest.writeString(allowedIPs);
+        dest.writeString(endpoint);
+        dest.writeString(persistentKeepalive);
+        dest.writeString(publicKey);
+    }
 }