XML Validator added

src/core/config/Categories.json

@@ -356,6 +356,7 @@
             "JSON Minify",
             "XML Beautify",
             "XML Minify",
+            "XML Validator",
             "SQL Beautify",
             "SQL Minify",
             "CSS Beautify",

src/core/operations/XMLValidator.mjs

@@ -0,0 +1,59 @@
+/**
+ * @author n1073645 [n1073645@gmail.com]
+ * @copyright Crown Copyright 2020
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+
+/**
+ * XML Validator operation
+ */
+class XMLValidator extends Operation {
+
+    /**
+     * XMLValidator constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "XML Validator";
+        this.module = "Default";
+        this.description = "";
+        this.infoURL = "";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+
+        const DOMParser = require("xmldom").DOMParser;
+
+        try {
+            // Overwrite error handler since the built-in one does not raise exceptions.
+            (new DOMParser({errorHandler: {
+                warning: (msg) => {
+                    throw new OperationError(msg);
+                },
+                error: (msg) => {
+                    throw new OperationError(msg);
+                },
+                fatalError: (msg) => {
+                    throw new OperationError(msg);
+                },
+            }})).parseFromString(input);
+        } catch (err) {
+            throw new OperationError(err);
+        }
+        return input;
+    }
+}
+
+export default XMLValidator;