Feature: Add Base92 operations

src/core/operations/ToBase92.mjs

@@ -0,0 +1,67 @@
+/**
+ * @author sg5506844 [sg5506844@gmail.com]
+ * @copyright Crown Copyright 2021
+ * @license Apache-2.0
+ */
+
+import { base92Chr } from "../lib/Base92.mjs";
+import Operation from "../Operation.mjs";
+
+/**
+ * To Base92 operation
+ */
+class ToBase92 extends Operation {
+    /**
+     * ToBase92 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "To 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 = "";
+
+        while (input.length > 0) {
+            while (bitString.length < 13 && input.length > 0) {
+                bitString += input[0].charCodeAt(0).toString(2).padStart(8, "0");
+                input = input.slice(1);
+            }
+            if (bitString.length < 13)
+                break;
+            const i = parseInt(bitString.slice(0, 13), 2);
+            res.push(base92Chr(Math.floor(i / 91)));
+            res.push(base92Chr(i % 91));
+            bitString = bitString.slice(13);
+        }
+
+        if (bitString.length > 0) {
+            if (bitString.length < 7) {
+                bitString = bitString.padEnd(6, "0");
+                res.push(base92Chr(parseInt(bitString, 2)));
+            } else {
+                bitString = bitString.padEnd(13, "0");
+                const i = parseInt(bitString.slice(0, 13), 2);
+                res.push(base92Chr(Math.floor(i / 91)));
+                res.push(base92Chr(i % 91));
+            }
+        }
+
+        return res;
+
+    }
+}
+
+export default ToBase92;