ESM: Ported BSON, ToTable, Filetime and XKCD operations

src/core/operations/UNIXTimestampToWindowsFiletime.mjs

@@ -0,0 +1,76 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2017
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import BigNumber from "bignumber.js";
+import OperationError from "../errors/OperationError";
+
+/**
+ * UNIX Timestamp to Windows Filetime operation
+ */
+class UNIXTimestampToWindowsFiletime extends Operation {
+
+    /**
+     * UNIXTimestampToWindowsFiletime constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "UNIX Timestamp to Windows Filetime";
+        this.module = "Default";
+        this.description = "Converts a UNIX timestamp to a Windows Filetime value.<br><br>A Windows Filetime is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 UTC.<br><br>A UNIX timestamp is a 32-bit value representing the number of seconds since January 1, 1970 UTC (the UNIX epoch).<br><br>This operation also supports UNIX timestamps in milliseconds, microseconds and nanoseconds.";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Input units",
+                "type": "option",
+                "value": ["Seconds (s)", "Milliseconds (ms)", "Microseconds (μs)", "Nanoseconds (ns)"]
+            },
+            {
+                "name": "Output format",
+                "type": "option",
+                "value": ["Decimal", "Hex"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [units, format] = args;
+
+        if (!input) return "";
+
+        input = new BigNumber(input);
+
+        if (units === "Seconds (s)"){
+            input = input.multipliedBy(new BigNumber("10000000"));
+        } else if (units === "Milliseconds (ms)") {
+            input = input.multipliedBy(new BigNumber("10000"));
+        } else if (units === "Microseconds (μs)") {
+            input = input.multiplyiedBy(new BigNumber("10"));
+        } else if (units === "Nanoseconds (ns)") {
+            input = input.dividedBy(new BigNumber("100"));
+        } else {
+            throw new OperationError("Unrecognised unit");
+        }
+
+        input = input.plus(new BigNumber("116444736000000000"));
+
+        if (format === "Hex"){
+            return input.toString(16);
+        } else {
+            return input.toFixed();
+        }
+    }
+
+}
+
+export default UNIXTimestampToWindowsFiletime;