ESM: Added Zlib ops and created a Zlib library.

src/core/operations/Unzip.mjs

@@ -0,0 +1,80 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Utils from "../Utils";
+import unzip from "zlibjs/bin/unzip.min";
+
+const Zlib = unzip.Zlib;
+
+/**
+ * Unzip operation
+ */
+class Unzip extends Operation {
+
+    /**
+     * Unzip constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Unzip";
+        this.module = "Compression";
+        this.description = "Decompresses data using the PKZIP algorithm and displays it per file, with support for passwords.";
+        this.inputType = "byteArray";
+        this.outputType = "html";
+        this.args = [
+            {
+                name: "Password",
+                type: "binaryString",
+                value: ""
+            },
+            {
+                name: "Verify result",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {html}
+     */
+    run(input, args) {
+        const options = {
+                password: Utils.strToByteArray(args[0]),
+                verify: args[1]
+            },
+            unzip = new Zlib.Unzip(input, options),
+            filenames = unzip.getFilenames(),
+            files = [];
+
+        filenames.forEach(function(fileName) {
+            const bytes = unzip.decompress(fileName);
+            const contents = Utils.byteArrayToUtf8(bytes);
+
+            const file = {
+                fileName: fileName,
+                size: contents.length,
+            };
+
+            const isDir = contents.length === 0 && fileName.endsWith("/");
+            if (!isDir) {
+                file.bytes = bytes;
+                file.contents = contents;
+            }
+
+            files.push(file);
+        });
+
+        return Utils.displayFilesAsHTML(files);
+    }
+
+}
+
+export default Unzip;