Added tolerance option to uncaption, fixed nogif return type

commands/image-editing/snapchat.js

@@ -16,7 +16,7 @@ class SnapchatCommand extends ImageCommand {
   static flags = [{
     name: "position",
     type: "number",
-    description: "Set the position of the caption as a decimal (0.0 is top, 1.0 is bottom)"
+    description: "Set the position of the caption as a decimal (0.0 is top, 1.0 is bottom, default is 0.5)"
   }];
 
   static requiresText = true;

commands/image-editing/uncaption.js

@@ -1,7 +1,19 @@
 import ImageCommand from "../../classes/imageCommand.js";
 
 class UncaptionCommand extends ImageCommand {
+  params() {
+    const tolerance = parseFloat(this.specialArgs.tolerance);
+    return {
+      tolerance: isNaN(tolerance) ? 0.95 : tolerance
+    };
+  }
+
   static description = "Removes the caption from an image";
+  static flags = [{
+    name: "tolerance",
+    type: "number",
+    description: "Set the shade tolerance for the caption detection (0.0 is highest, 1.0 is lowest, default is 0.95)"
+  }];
 
   static noImage = "You need to provide an image/GIF to uncaption!";
   static command = "uncaption";

natives/uncaption.cc

@@ -13,6 +13,7 @@ Napi::Value Uncaption(const Napi::CallbackInfo &info) {
   try {
     Napi::Object obj = info[0].As<Napi::Object>();
     Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
+    float tolerance = obj.Has("tolerance") ? obj.Get("tolerance").As<Napi::Number>().FloatValue() : 0.95;
     string type = obj.Get("type").As<Napi::String>().Utf8Value();
     int delay =
         obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
@@ -37,7 +38,7 @@ Napi::Value Uncaption(const Napi::CallbackInfo &info) {
     ssize_t row;
     for (row = 0; row < rows; ++row) {
       ColorGray color = firstImage.pixelColor(0, row);
-      if (color.shade() < 0.95) {
+      if (color.shade() < tolerance) {
         break;
       }
     }

utils/imageConnection.js

@@ -155,6 +155,9 @@ class ImageConnection {
       case "image/webp":
         type = "webp";
         break;
+      default:
+        type = contentType;
+        break;
     }
     return { buffer: Buffer.from(await req.arrayBuffer()), type };
   }