add time between boosts

Fixes #269

src/app/components/ShipSummaryTable.jsx

@@ -51,6 +51,7 @@ export default class ShipSummaryTable extends TranslatedComponent {
     const canBoost = ship.canBoost(cargo, ship.fuelCapacity);
     const boostTooltip = canBoost ? 'TT_SUMMARY_BOOST' : canThrust ? 'TT_SUMMARY_BOOST_NONFUNCTIONAL' : 'TT_SUMMARY_SPEED_NONFUNCTIONAL';
     const sgMetrics = Calc.shieldMetrics(ship, pips.sys || 2);
+    const shipBoost = canBoost ?  Calc.calcBoost(ship) : 'No Boost';
     const armourMetrics = Calc.armourMetrics(ship);
     let shieldColour = 'blue';
     if (shieldGenerator && shieldGenerator.m.grp === 'psg') {
@@ -81,6 +82,7 @@ export default class ShipSummaryTable extends TranslatedComponent {
             <th onMouseEnter={termtip.bind(null, 'hull hardness', { cap: 0 })} onMouseLeave={hide} rowSpan={2}>{translate('hrd')}</th>
             <th rowSpan={2}>{translate('crew')}</th>
             <th onMouseEnter={termtip.bind(null, 'mass lock factor', { cap: 0 })} onMouseLeave={hide} rowSpan={2}>{translate('MLF')}</th>
+            <th onMouseEnter={termtip.bind(null, 'TT_SUMMARY_BOOST_TIME', { cap: 0 })} onMouseLeave={hide} rowSpan={2}>{translate('boost time')}</th>
           </tr>
           <tr>
             <th className='lft'>{translate('max')}</th>
@@ -117,6 +119,7 @@ export default class ShipSummaryTable extends TranslatedComponent {
             <td>{int(ship.hardness)}</td>
             <td>{ship.crew}</td>
             <td>{ship.masslock}</td>
+            <td>{shipBoost !== 'No Boost' ? formats.time(shipBoost) : 'No Boost'}</td>
           </tr>
         </tbody>
       </table>

src/app/i18n/en.json

@@ -61,6 +61,7 @@
     "TT_SUMMARY_SPEED": "With full fuel tank and 4 pips to ENG",
     "TT_SUMMARY_SPEED_NONFUNCTIONAL": "Thrusters powered off or over maximum mass with full fuel and cargo loads",
     "TT_SUMMARY_BOOST": "With full fuel tank and 4 pips to ENG",
+    "TT_SUMMARY_BOOST_TIME": "Time between each boost with 4 pips to ENG",
     "TT_SUMMARY_BOOST_NONFUNCTIONAL": "Power distributor not able to supply enough power to boost",
     "TT_SUMMARY_SHIELDS": "Raw shield strength, including boosters",
     "TT_SUMMARY_SHIELDS_SCB": "Raw shield strength, including boosters and SCBs",
@@ -179,6 +180,7 @@
     "internal protection": "Internal protection",
     "external protection": "External protection",
     "engagement range": "Engagement range",
+    "boost time": "Boost time",
     "total": "Total",
     "ammo": "Ammunition maximum",
     "boot": "Boot time",

src/app/shipyard/Calculations.js

@@ -452,6 +452,19 @@ export function shieldMetrics(ship, sys) {
   return shield;
 }
 
+/**
+ * Calculate time from one boost to another
+ * @return {number} Boost frequency in seconds
+ * @param ship
+ */
+export function calcBoost(ship) {
+  if (!ship.boostEnergy || !ship.standard[4] || !ship.standard[4].m) {
+    return undefined;
+  }
+  return ship.boostEnergy / ship.standard[4].m.engrate;
+}
+
+
 /**
  * Calculate armour metrics
  * @param   {Object}  ship            The ship