From 61a1498b47aac7657c720a3fe151612b84139a5c Mon Sep 17 00:00:00 2001
From: Zanfir Ovidius Stefan <zanfir.ovidius@gmail.com>
Date: Wed, 11 Jul 2018 10:37:38 +0300
Subject: [PATCH] Return resized thumbnail (only Android)

---
 .../me/hauvo/thumbnail/RNThumbnailModule.java | 36 ++++++++++++++++---
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/android/src/main/java/me/hauvo/thumbnail/RNThumbnailModule.java b/android/src/main/java/me/hauvo/thumbnail/RNThumbnailModule.java
index 33264a7..fa67570 100644
--- a/android/src/main/java/me/hauvo/thumbnail/RNThumbnailModule.java
+++ b/android/src/main/java/me/hauvo/thumbnail/RNThumbnailModule.java
@@ -15,14 +15,13 @@
 import android.os.Environment;
 import android.util.Log;
 import android.media.MediaMetadataRetriever;
-import 	android.graphics.Matrix;
+import android.graphics.Matrix;
 
 import java.util.UUID;
 import java.io.File;
 import java.io.OutputStream;
 import java.io.FileOutputStream;
 
-
 public class RNThumbnailModule extends ReactContextBaseJavaModule {
 
   private final ReactApplicationContext reactContext;
@@ -32,18 +31,39 @@ public RNThumbnailModule(ReactApplicationContext reactContext) {
     this.reactContext = reactContext;
   }
 
+  public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
+    int width = image.getWidth();
+    int height = image.getHeight();
+
+    float bitmapRatio = (float) width / (float) height;
+    if (bitmapRatio > 1) {
+      width = maxSize;
+      height = (int) (width / bitmapRatio);
+    } else {
+      height = maxSize;
+      width = (int) (height * bitmapRatio);
+    }
+
+    return Bitmap.createScaledBitmap(image, width, height, true);
+  }
+
   @Override
   public String getName() {
     return "RNThumbnail";
   }
 
   @ReactMethod
-  public void get(String filePath, Promise promise) {
-    filePath = filePath.replace("file://","");
+  public void getResized(String filePath, Integer maxSize, Promise promise) {
+    filePath = filePath.replace("file://", "");
     MediaMetadataRetriever retriever = new MediaMetadataRetriever();
     retriever.setDataSource(filePath);
     Bitmap image = retriever.getFrameAtTime(1000000, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
 
+    if (maxSize != null) {
+      // resize the image based on the maxSize parameter
+      image = getResizedBitmap(image, maxSize);
+    }
+
     String fullPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/thumb";
 
     try {
@@ -64,7 +84,8 @@ public void get(String filePath, Promise promise) {
       fOut.flush();
       fOut.close();
 
-      // MediaStore.Images.Media.insertImage(reactContext.getContentResolver(), file.getAbsolutePath(), file.getName(), file.getName());
+      // MediaStore.Images.Media.insertImage(reactContext.getContentResolver(),
+      // file.getAbsolutePath(), file.getName(), file.getName());
 
       WritableMap map = Arguments.createMap();
 
@@ -79,4 +100,9 @@ public void get(String filePath, Promise promise) {
       promise.reject("E_RNThumnail_ERROR", e);
     }
   }
+
+  @ReactMethod
+  public void get(String filePath, Promise promise) {
+    getResized(filePath, null, promise);
+  }
 }