ESM: Ported CharEnc operations

src/core/lib/ChrEnc.mjs

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+/**
+ * Character encoding resources.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+/**
+ * Character encoding format mappings.
+ */
+export const IO_FORMAT = {
+    "UTF-8 (65001)": 65001,
+    "UTF-7 (65000)": 65000,
+    "UTF16LE (1200)": 1200,
+    "UTF16BE (1201)": 1201,
+    "UTF16 (1201)": 1201,
+    "IBM EBCDIC International (500)": 500,
+    "IBM EBCDIC US-Canada (37)": 37,
+    "Windows-874 Thai (874)": 874,
+    "Japanese Shift-JIS (932)": 932,
+    "Simplified Chinese GBK (936)": 936,
+    "Korean (949)": 949,
+    "Traditional Chinese Big5 (950)": 950,
+    "Windows-1250 Central European (1250)": 1250,
+    "Windows-1251 Cyrillic (1251)": 1251,
+    "Windows-1252 Latin (1252)": 1252,
+    "Windows-1253 Greek (1253)": 1253,
+    "Windows-1254 Turkish (1254)": 1254,
+    "Windows-1255 Hebrew (1255)": 1255,
+    "Windows-1256 Arabic (1256)": 1256,
+    "Windows-1257 Baltic (1257)": 1257,
+    "Windows-1258 Vietnam (1258)": 1258,
+    "US-ASCII (20127)": 20127,
+    "Simplified Chinese GB2312 (20936)": 20936,
+    "KOI8-R Russian Cyrillic (20866)": 20866,
+    "KOI8-U Ukrainian Cyrillic (21866)": 21866,
+    "ISO-8859-1 Latin 1 Western European (28591)": 28591,
+    "ISO-8859-2 Latin 2 Central European (28592)": 28592,
+    "ISO-8859-3 Latin 3 South European (28593)": 28593,
+    "ISO-8859-4 Latin 4 North European (28594)": 28594,
+    "ISO-8859-5 Latin/Cyrillic (28595)": 28595,
+    "ISO-8859-6 Latin/Arabic (28596)": 28596,
+    "ISO-8859-7 Latin/Greek (28597)": 28597,
+    "ISO-8859-8 Latin/Hebrew (28598)": 28598,
+    "ISO-8859-9 Latin 5 Turkish (28599)": 28599,
+    "ISO-8859-10 Latin 6 Nordic (28600)": 28600,
+    "ISO-8859-11 Latin/Thai (28601)": 28601,
+    "ISO-8859-13 Latin 7 Baltic Rim (28603)": 28603,
+    "ISO-8859-14 Latin 8 Celtic (28604)": 28604,
+    "ISO-8859-15 Latin 9 (28605)": 28605,
+    "ISO-8859-16 Latin 10 (28606)": 28606,
+    "ISO-2022 JIS Japanese (50222)": 50222,
+    "EUC Japanese (51932)": 51932,
+    "EUC Korean (51949)": 51949,
+    "Simplified Chinese GB18030 (54936)": 54936,
+};
+

src/core/operations/DecodeText.mjs

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+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import cptable from "../vendor/js-codepage/cptable.js";
+import {IO_FORMAT} from "../lib/ChrEnc";
+
+/**
+ * Decode text operation
+ */
+class DecodeText extends Operation {
+
+    /**
+     * DecodeText constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Decode text";
+        this.module = "CharEnc";
+        this.description = [
+            "Decodes text from the chosen character encoding.",
+            "<br><br>",
+            "Supported charsets are:",
+            "<ul>",
+            Object.keys(IO_FORMAT).map(e => `<li>${e}</li>`).join("\n"),
+            "</ul>",
+        ].join("\n");
+        this.inputType = "byteArray";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Encoding",
+                "type": "option",
+                "value": Object.keys(IO_FORMAT)
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const format = IO_FORMAT[args[0]];
+        return cptable.utils.decode(format, input);
+    }
+
+}
+
+export default DecodeText;

src/core/operations/EncodeText.mjs

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+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import cptable from "../vendor/js-codepage/cptable.js";
+import {IO_FORMAT} from "../lib/ChrEnc";
+
+/**
+ * Encode text operation
+ */
+class EncodeText extends Operation {
+
+    /**
+     * EncodeText constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Encode text";
+        this.module = "CharEnc";
+        this.description = [
+            "Encodes text into the chosen character encoding.",
+            "<br><br>",
+            "Supported charsets are:",
+            "<ul>",
+            Object.keys(IO_FORMAT).map(e => `<li>${e}</li>`).join("\n"),
+            "</ul>",
+        ].join("\n");
+        this.inputType = "string";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                "name": "Encoding",
+                "type": "option",
+                "value": Object.keys(IO_FORMAT)
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const format = IO_FORMAT[args[0]];
+        let encoded = cptable.utils.encode(format, input);
+        encoded = Array.from(encoded);
+        return encoded;
+    }
+
+}
+
+
+export default EncodeText;