[error-toast] Show toast when network error occurred

app/src/main/java/com/keylesspalace/tusky/di/NetworkModule.kt

@@ -33,6 +33,7 @@ import dagger.Provides
 import dagger.multibindings.ClassKey
 import dagger.multibindings.IntoMap
 import dagger.multibindings.IntoSet
+import net.accelf.yuito.HttpToastInterceptor
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
 import retrofit2.Converter
@@ -79,6 +80,7 @@ class NetworkModule {
                     addInterceptor(InstanceSwitchAuthInterceptor(accountManager))
                     if (BuildConfig.DEBUG) {
                         addInterceptor(HttpLoggingInterceptor().apply { level = HttpLoggingInterceptor.Level.BASIC })
+                        addInterceptor(HttpToastInterceptor(context))
                     }
                 }
                 .build()
@@ -114,6 +116,7 @@ class NetworkModule {
                 .apply {
                     if (BuildConfig.DEBUG) {
                         addInterceptor(HttpLoggingInterceptor().apply { level = HttpLoggingInterceptor.Level.BASIC })
+                        addInterceptor(HttpToastInterceptor(context))
                     }
                 }
                 .build()

app/src/main/java/net/accelf/yuito/HttpToastInterceptor.java

@@ -0,0 +1,51 @@
+package net.accelf.yuito;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+
+import java.io.IOException;
+
+import okhttp3.Interceptor;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public final class HttpToastInterceptor implements Interceptor {
+
+    private Context context;
+
+    public HttpToastInterceptor(Context context) {
+        this.context = context;
+    }
+
+    @Override
+    @NonNull
+    public Response intercept(@NonNull Chain chain) throws IOException {
+        Request request = chain.request();
+        Response response;
+        try {
+            response = chain.proceed(request);
+        } catch (Exception e) {
+            toast(request.method() + " " + request.url() + "\n" + e);
+            throw e;
+        }
+
+        int code = response.code();
+        if (code == 200) {
+            return response;
+        }
+
+        toast(request.method() + " " + request.url() + "\n" + code + " " + response.message());
+
+        return response;
+    }
+
+    private void toast(String text) {
+        Handler handler = new Handler(Looper.getMainLooper());
+        handler.post(() -> Toast.makeText(context, text, Toast.LENGTH_SHORT).show());
+
+    }
+}