ESM: Added Zlib ops and created a Zlib library.

2025-04-21 07:16:17 -04:00 · 2018-04-02 20:46:55 +01:00 · 2018-04-02 20:46:55 +01:00 · 083d2d1cc4
commit 083d2d1cc4
parent fbb3a02315
16 changed files with 913 additions and 350 deletions
--- a/src/core/operations/Zip.mjs
+++ b/src/core/operations/Zip.mjs
@ -0,0 +1,101 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Utils from "../Utils";
+import {COMPRESSION_TYPE, ZLIB_COMPRESSION_TYPE_LOOKUP} from "../lib/Zlib";
+import zip from "zlibjs/bin/zip.min";
+
+const Zlib = zip.Zlib;
+
+const ZIP_COMPRESSION_METHOD_LOOKUP = {
+    "Deflate":      Zlib.Zip.CompressionMethod.DEFLATE,
+    "None (Store)": Zlib.Zip.CompressionMethod.STORE
+};
+
+const ZIP_OS_LOOKUP = {
+    "MSDOS":     Zlib.Zip.OperatingSystem.MSDOS,
+    "Unix":      Zlib.Zip.OperatingSystem.UNIX,
+    "Macintosh": Zlib.Zip.OperatingSystem.MACINTOSH
+};
+
+/**
+ * Zip operation
+ */
+class Zip extends Operation {
+
+    /**
+     * Zip constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Zip";
+        this.module = "Compression";
+        this.description = "Compresses data using the PKZIP algorithm with the given filename.<br><br>No support for multiple files at this time.";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                name: "Filename",
+                type: "string",
+                value: "file.txt"
+            },
+            {
+                name: "Comment",
+                type: "string",
+                value: ""
+            },
+            {
+                name: "Password",
+                type: "binaryString",
+                value: ""
+            },
+            {
+                name: "Compression method",
+                type: "option",
+                value: ["Deflate", "None (Store)"]
+            },
+            {
+                name: "Operating system",
+                type: "option",
+                value: ["MSDOS", "Unix", "Macintosh"]
+            },
+            {
+                name: "Compression type",
+                type: "option",
+                value: COMPRESSION_TYPE
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const password = Utils.strToByteArray(args[2]),
+            options = {
+                filename: Utils.strToByteArray(args[0]),
+                comment: Utils.strToByteArray(args[1]),
+                compressionMethod: ZIP_COMPRESSION_METHOD_LOOKUP[args[3]],
+                os: ZIP_OS_LOOKUP[args[4]],
+                deflateOption: {
+                    compressionType: ZLIB_COMPRESSION_TYPE_LOOKUP[args[5]]
+                },
+            },
+            zip = new Zlib.Zip();
+
+        if (password.length)
+            zip.setPassword(password);
+        zip.addFile(input, options);
+        return Array.prototype.slice.call(zip.compress());
+    }
+
+}
+
+export default Zip;