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

src/core/config/Categories.json

@@ -51,7 +51,9 @@
             "Decode text",
             "Swap endianness",
             "To MessagePack",
-            "From MessagePack"
+            "From MessagePack",
+            "To Braille",
+            "From Braille"
         ]
     },
     {

src/core/lib/Braille.mjs

@@ -0,0 +1,15 @@
+/**
+ * Braille resources.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+/**
+ * Braille lookup table.
+ */
+export const BRAILLE_LOOKUP = {
+    ascii: " A1B'K2L@CIF/MSP\"E3H9O6R^DJG>NTQ,*5<-U8V.%[$+X!&;:4\\0Z7(_?W]#Y)=",
+    dot6:  "⠀⠁⠂⠃⠄⠅⠆⠇⠈⠉⠊⠋⠌⠍⠎⠏⠐⠑⠒⠓⠔⠕⠖⠗⠘⠙⠚⠛⠜⠝⠞⠟⠠⠡⠢⠣⠤⠥⠦⠧⠨⠩⠪⠫⠬⠭⠮⠯⠰⠱⠲⠳⠴⠵⠶⠷⠸⠹⠺⠻⠼⠽⠾⠿"
+};

src/core/operations/FromBraille.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";
+
+/**
+ * From Braille operation
+ */
+class FromBraille extends Operation {
+
+    /**
+     * FromBraille constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "From Braille";
+        this.module = "Default";
+        this.description = "Converts six-dot braille symbols to text.";
+        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(b => {
+            const idx = BRAILLE_LOOKUP.dot6.indexOf(b);
+            return idx < 0 ? b : BRAILLE_LOOKUP.ascii[idx];
+        }).join("");
+    }
+
+    /**
+     * Highlight From Braille
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlight(pos, args) {
+        return pos;
+    }
+
+    /**
+     * Highlight From 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 FromBraille;

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;