Converted JS operations

Deleted legacy files, neatened args in other ported ops

src/core/operations/JavaScriptMinify.mjs

@@ -0,0 +1,57 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import * as esprima from "esprima";
+import escodegen from "escodegen";
+import esmangle from "esmangle";
+
+/**
+ * JavaScript Minify operation
+ */
+class JavaScriptMinify extends Operation {
+
+    /**
+     * JavaScriptMinify constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JavaScript Minify";
+        this.module = "Code";
+        this.description = "Compresses JavaScript code.";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let result = "";
+        const AST = esprima.parseScript(input),
+            optimisedAST = esmangle.optimize(AST, null),
+            mangledAST = esmangle.mangle(optimisedAST);
+
+        result = escodegen.generate(mangledAST, {
+            format: {
+                renumber:    true,
+                hexadecimal: true,
+                escapeless:  true,
+                compact:     true,
+                semicolons:  false,
+                parentheses: false
+            }
+        });
+        return result;
+    }
+
+}
+
+export default JavaScriptMinify;