'To Braille' and 'From Braille' operations added. Closes #255

src/core/operations/ToBraille.mjs

@@ -0,0 +1,70 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import {BRAILLE_LOOKUP} from "../lib/Braille";
+
+/**
+ * To Braille operation
+ */
+class ToBraille extends Operation {
+
+    /**
+     * ToBraille constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To Braille";
+        this.module = "Default";
+        this.description = "Converts text to six-dot braille symbols.";
+        this.infoURL = "https://wikipedia.org/wiki/Braille";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        return input.split("").map(c => {
+            const idx = BRAILLE_LOOKUP.ascii.indexOf(c.toUpperCase());
+            return idx < 0 ? c : BRAILLE_LOOKUP.dot6[idx];
+        }).join("");
+    }
+
+    /**
+     * Highlight To Braille
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlight(pos, args) {
+        return pos;
+    }
+
+    /**
+     * Highlight To Braille in reverse
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlightReverse(pos, args) {
+        return pos;
+    }
+
+}
+
+export default ToBraille;