Feature: Add Base92 operations

src/core/operations/FromBase92.mjs

@@ -0,0 +1,55 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import { base92Ord } from "../lib/Base92.mjs";
+import Operation from "../Operation.mjs";
+
+/**
+ * From Base92 operation
+ */
+class FromBase92 extends Operation {
+    /**
+     * FromBase92 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "From Base92";
+        this.module = "Default";
+        this.description = "Base92 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.";
+        this.infoURL = "https://wikipedia.org/wiki/List_of_numeral_systems";
+        this.inputType = "string";
+        this.outputType = "byteArray";
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const res = [];
+        let bitString = "";
+
+        for (let i = 0; i < input.length; i += 2) {
+            if (i + 1 !== input.length) {
+                const x = base92Ord(input[i]) * 91 + base92Ord(input[i + 1]);
+                bitString += x.toString(2).padStart(13, "0");
+            } else {
+                const x = base92Ord(input[i]);
+                bitString += x.toString(2).padStart(6, "0");
+            }
+            while (bitString.length >= 8) {
+                res.push(parseInt(bitString.slice(0, 8), 2));
+                bitString = bitString.slice(8);
+            }
+        }
+
+        return res;
+    }
+}
+
+export default FromBase92;