ESM: Added Zlib ops and created a Zlib library.

src/core/operations/RawDeflate.mjs

@@ -0,0 +1,58 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import {COMPRESSION_TYPE} from "../lib/Zlib";
+import rawdeflate from "zlibjs/bin/rawdeflate.min";
+
+const Zlib = rawdeflate.Zlib;
+
+const RAW_COMPRESSION_TYPE_LOOKUP = {
+    "Fixed Huffman Coding":   Zlib.RawDeflate.CompressionType.FIXED,
+    "Dynamic Huffman Coding": Zlib.RawDeflate.CompressionType.DYNAMIC,
+    "None (Store)":           Zlib.RawDeflate.CompressionType.NONE,
+};
+
+/**
+ * Raw Deflate operation
+ */
+class RawDeflate extends Operation {
+
+    /**
+     * RawDeflate constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Raw Deflate";
+        this.module = "Compression";
+        this.description = "Compresses data using the deflate algorithm with no headers.";
+        this.inputType = "byteArray";
+        this.outputType = "byteArray";
+        this.args = [
+            {
+                name: "Compression type",
+                type: "option",
+                value: COMPRESSION_TYPE
+            }
+        ];
+    }
+
+    /**
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    run(input, args) {
+        const deflate = new Zlib.RawDeflate(input, {
+            compressionType: RAW_COMPRESSION_TYPE_LOOKUP[args[0]]
+        });
+        return Array.prototype.slice.call(deflate.compress());
+    }
+
+}
+
+export default RawDeflate;