Move some functions to Util, Bug Fixes, new stuff

util/Canvas.js

@@ -126,4 +126,24 @@ module.exports = class CanvasUtil {
 			return resolve(lines);
 		});
 	}
+
+	static centerImage(base, data) {
+		const dataRatio = data.width / data.height;
+		const baseRatio = base.width / base.height;
+		let { width, height } = data;
+		let x = 0;
+		let y = 0;
+		if (baseRatio < dataRatio) {
+			height = data.height;
+			width = base.width * (height / base.height);
+			x = (data.width - width) / 2;
+			y = 0;
+		} else if (baseRatio > dataRatio) {
+			width = data.width;
+			height = base.height * (width / base.width);
+			x = 0;
+			y = (data.height - height) / 2;
+		}
+		return { x, y, width, height };
+	}
 };