Ported Image operations + some cleanup

src/core/operations/RemoveEXIF.mjs

@@ -0,0 +1,50 @@
+/**
+ * @author tlwr [toby@toby.codes]
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ */
+
+import { removeEXIF } from "../vendor/remove-exif";
+import Operation from "../Operation";
+import OperationError from "../errors/OperationError";
+
+/**
+ * Remove EXIF operation
+ */
+class RemoveEXIF extends Operation {
+
+    /**
+     * RemoveEXIF constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Remove EXIF";
+        this.module = "Image";
+        this.description = "Removes EXIF data from a JPEG image.\n<br><br>\nEXIF data embedded in photos usually contains information about the image file itself as well as the device used to create it.";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        // Do nothing if input is empty
+        if (input.length === 0) return input;
+
+        try {
+            return removeEXIF(input);
+        } catch (err) {
+            // Simply return input if no EXIF data is found
+            if (err === "Exif not found.") return input;
+            throw new OperationError(`Could not remove EXIF data from image: ${err}`);
+        }
+    }
+
+}
+
+export default RemoveEXIF;