Allow for SE prefixes when formating module stats

src/app/shipyard/Module.js

@@ -1,7 +1,7 @@
 import * as ModuleUtils from './ModuleUtils';
 import { Modifications } from 'coriolis-data/dist';
 import React from 'react';
-import StatsFormating from './StatsFormating';
+import { STATS_FORMATING, SI_PREFIXES } from './StatsFormating';
 
 /**
  * Module - active module in a ship's buildout
@@ -45,8 +45,8 @@ export default class Module {
     let result = this.mods  && this.mods[name] ? this.mods[name] : null;
 
     // Calculate the percentage change for a synthetic value
-    if (StatsFormating[name] && StatsFormating[name].synthetic) {
-      const statGetter = this[StatsFormating[name].synthetic];
+    if (STATS_FORMATING[name] && STATS_FORMATING[name].synthetic) {
+      const statGetter = this[STATS_FORMATING[name].synthetic];
       let unmodifiedStat = statGetter.call(this, false);
       let modifiedStat = statGetter.call(this, true);
       result = (modifiedStat / unmodifiedStat - 1)  * 10000;
@@ -201,12 +201,15 @@ export default class Module {
    * Creates a react element that pretty-prints the queried module value
    * @param {String} name     The name of the value
    * @param {object} language Language object holding formats and util functions
+   * @param {String} [unit]   If unit is given not the stat's default formating
+   *                          unit will be applied but the given one taking into
+   *                          account SI-prefixes such as kilo, milli, etc.
    * @param {Number} [val]    If val is given, not the modules value but given
    *                          one will be formated
    * @returns {React.Component} The formated value as component
    */
-  formatModifiedValue(name, language, val) {
-    const formatingOptions = StatsFormating[name];
+  formatModifiedValue(name, language, unit, val) {
+    const formatingOptions = STATS_FORMATING[name];
     if (val === undefined) {
       if (formatingOptions && formatingOptions.synthetic) {
         val = (this[formatingOptions.synthetic]).call(this, true);
@@ -223,8 +226,27 @@ export default class Module {
       );
     }
 
-    if (formatingOptions.format && language.formats[formatingOptions.format]) {
-      val = (language.formats[formatingOptions.format])(val);
+    let { format } = formatingOptions;
+    unit = unit || formatingOptions.unit;
+    let storedUnit = formatingOptions.storedUnit || formatingOptions.unit;
+    let factor = 1;
+    if (storedUnit && storedUnit !== unit) {
+      // Find out si prefix of storedUnit and unit as si prefixes can only take
+      // on charactere it suffices to compare the first character of each string
+      let prefixUnit = unit[0];
+      let prefixStored = unit[0];
+      if (unit.length > storedUnit.length) {
+        factor /= SI_PREFIXES[prefixUnit];
+      } else if (storedUnit.length > unit.length) {
+        factor *= SI_PREFIXES[prefixStored];
+      } else if (prefixUnit !== prefixStored) {
+        factor *= SI_PREFIXES[prefixStored];
+        factor /= SI_PREFIXES[prefixUnit];
+      }
+    }
+
+    if (format && language.formats[format]) {
+      val = (language.formats[format])(val * factor);
     }
 
     return (

src/app/shipyard/StatsFormating.js

@@ -1,4 +1,28 @@
-export default {
+export const SI_PREFIXES = {
+  'Y': 1e+24, // Yotta
+  'Z': 1e+21, // Zetta
+  'E': 1e+18, // Peta
+  'P': 1e+15, // Peta
+  'T': 1e+12, // Tera
+  'G': 1e+9,  // Giga
+  'M': 1e+6,  // Mega
+  'k': 1e+3,  // Kilo
+  'h': 1e+2,  // Hekto
+  'da': 1e+1, // Deka
+  '': 1,
+  'd': 1e-1,  // Dezi
+  'c': 1e-2,  // Zenti
+  'm': 1e-3,  // Milli
+  'μ': 1e-6, // mikro not supported due to charset
+  'n': 10e-9, // Nano
+  'p': 1e-12, // Nano
+  'f': 1e-15, // Femto
+  'a': 1e-18, // Atto
+  'z': 1e-21, // Zepto
+  'y': 1e-24  // Yokto
+};
+
+export const STATS_FORMATING = {
   'ammo': { 'format': 'int', },
   'boot': { 'format': 'int', 'unit': 'secs' },
   'brokenregen': { 'format': 'round1', 'unit': 'ps' },
@@ -17,8 +41,8 @@ export default {
   'eps': { 'format': 'round', 'units': 'ps', 'synthetic': 'getEps' },
   'explres': { 'format': 'pct' },
   'facinglimit': { 'format': 'round1', 'unit': 'ang' },
-  'falloff': { 'format': 'round1', 'unit': 'm' },
-  'fallofffromrange': { 'format': 'round1', 'unit': 'm', 'synthetic': 'getFalloff' },
+  'falloff': { 'format': 'round1', 'unit': 'km', 'storedUnit': 'm' },
+  'fallofffromrange': { 'format': 'round1', 'unit': 'km', 'storedUnit': 'm', 'synthetic': 'getFalloff' },
   'hps': { 'format': 'round', 'units': 'ps', 'synthetic': 'getHps' },
   'hullboost': { 'format': 'pct1' },
   'hullreinforcement': { 'format': 'int' },
@@ -33,7 +57,7 @@ export default {
   'piercing': { 'format': 'int' },
   'power': { 'format': 'round', 'unit': 'MW' },
   'protection': { 'format': 'pct' },
-  'range': { 'format': 'round1', 'unit': 'm' },
+  'range': { 'format': 'round1', 'unit': 'km', 'storedUnit': 'm' },
   'ranget': { 'format': 'round1', 'unit': 's' },
   'regen': { 'format': 'round1', 'unit': 'ps' },
   'reload': { 'format': 'int', 'unit': 's' },