Merged esm branch into feature-magic. Ported FileType ops.

src/core/operations/Unzip.mjs

@@ -0,0 +1,82 @@
+/**
+ * @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 = "ArrayBuffer";
+        this.outputType = "List<File>";
+        this.presentType = "html";
+        this.args = [
+            {
+                name: "Password",
+                type: "binaryString",
+                value: ""
+            },
+            {
+                name: "Verify result",
+                type: "boolean",
+                value: false
+            }
+        ];
+        this.patterns = [
+            {
+                match: "^\\x50\\x4b(?:\\x03|\\x05|\\x07)(?:\\x04|\\x06|\\x08)",
+                flags: "",
+                args: ["", false]
+            },
+        ];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {File[]}
+     */
+    run(input, args) {
+        const options = {
+                password: Utils.strToByteArray(args[0]),
+                verify: args[1]
+            },
+            unzip = new Zlib.Unzip(new Uint8Array(input), options),
+            filenames = unzip.getFilenames();
+
+        return filenames.map(fileName => {
+            const bytes = unzip.decompress(fileName);
+            return new File([bytes], fileName);
+        });
+    }
+
+    /**
+     * Displays the files in HTML for web apps.
+     *
+     * @param {File[]} files
+     * @returns {html}
+     */
+    async present(files) {
+        return await Utils.displayFilesAsHTML(files);
+    }
+
+}
+
+export default Unzip;