ESM: Ported Convert operations

src/core/operations/ConvertDistance.mjs

@@ -0,0 +1,95 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+
+/**
+ * Convert distance operation
+ */
+class ConvertDistance extends Operation {
+
+    /**
+     * ConvertDistance constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Convert distance";
+        this.module = "Default";
+        this.description = "Converts a unit of distance to another format.";
+        this.inputType = "BigNumber";
+        this.outputType = "BigNumber";
+        this.args = [
+            {
+                "name": "Input units",
+                "type": "option",
+                "value": DISTANCE_UNITS
+            },
+            {
+                "name": "Output units",
+                "type": "option",
+                "value": DISTANCE_UNITS
+            }
+        ];
+    }
+
+    /**
+     * @param {BigNumber} input
+     * @param {Object[]} args
+     * @returns {BigNumber}
+     */
+    run(input, args) {
+        const [inputUnits, outputUnits] = args;
+
+        input = input.times(DISTANCE_FACTOR[inputUnits]);
+        return input.div(DISTANCE_FACTOR[outputUnits]);
+    }
+
+}
+
+const DISTANCE_UNITS = [
+    "[Metric]", "Nanometres (nm)", "Micrometres (µm)", "Millimetres (mm)", "Centimetres (cm)", "Metres (m)", "Kilometers (km)", "[/Metric]",
+    "[Imperial]", "Thou (th)", "Inches (in)", "Feet (ft)", "Yards (yd)", "Chains (ch)", "Furlongs (fur)", "Miles (mi)", "Leagues (lea)", "[/Imperial]",
+    "[Maritime]", "Fathoms (ftm)", "Cables", "Nautical miles", "[/Maritime]",
+    "[Comparisons]", "Cars (4m)", "Buses (8.4m)", "American football fields (91m)", "Football pitches (105m)", "[/Comparisons]",
+    "[Astronomical]", "Earth-to-Moons", "Earth's equators", "Astronomical units (au)", "Light-years (ly)", "Parsecs (pc)", "[/Astronomical]",
+];
+
+const DISTANCE_FACTOR = { // Multiples of a metre
+    "Nanometres (nm)":         1e-9,
+    "Micrometres (µm)":        1e-6,
+    "Millimetres (mm)":        1e-3,
+    "Centimetres (cm)":        1e-2,
+    "Metres (m)":              1,
+    "Kilometers (km)":         1e3,
+
+    "Thou (th)":               0.0000254,
+    "Inches (in)":             0.0254,
+    "Feet (ft)":               0.3048,
+    "Yards (yd)":              0.9144,
+    "Chains (ch)":             20.1168,
+    "Furlongs (fur)":          201.168,
+    "Miles (mi)":              1609.344,
+    "Leagues (lea)":           4828.032,
+
+    "Fathoms (ftm)":           1.853184,
+    "Cables":                  185.3184,
+    "Nautical miles":          1853.184,
+
+    "Cars (4m)":               4,
+    "Buses (8.4m)":            8.4,
+    "American football fields (91m)": 91,
+    "Football pitches (105m)": 105,
+
+    "Earth-to-Moons":          380000000,
+    "Earth's equators":        40075016.686,
+    "Astronomical units (au)": 149597870700,
+    "Light-years (ly)":        9460730472580800,
+    "Parsecs (pc)":            3.0856776e16
+};
+
+
+export default ConvertDistance;