ESM: Ported SeqUtils operations

src/core/operations/Reverse.mjs

@@ -0,0 +1,67 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+
+/**
+ * Reverse operation
+ */
+class Reverse extends Operation {
+
+    /**
+     * Reverse constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Reverse";
+        this.module = "Default";
+        this.description = "Reverses the input string.";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                "name": "By",
+                "type": "option",
+                "value": ["Character", "Line"]
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        let i;
+        if (args[0] === "Line") {
+            const lines = [];
+            let line = [],
+                result = [];
+            for (i = 0; i < input.length; i++) {
+                if (input[i] === 0x0a) {
+                    lines.push(line);
+                    line = [];
+                } else {
+                    line.push(input[i]);
+                }
+            }
+            lines.push(line);
+            lines.reverse();
+            for (i = 0; i < lines.length; i++) {
+                result = result.concat(lines[i]);
+                result.push(0x0a);
+            }
+            return result.slice(0, input.length);
+        } else {
+            return input.reverse();
+        }
+    }
+
+}
+
+export default Reverse;