fix(a380x): reset perf data on fmc reset

.github/CHANGELOG.md

@@ -52,6 +52,7 @@
 1. [A380X/LIGHTS] Added cockpit ambient bounce lights - @ImenesFBW (Imenes)
 1. [A380X/PERF] Changed managed speeds to more realistic numbers - @slightlyclueles (abnormaltoast)
 1. [A380X/MFD] Add ATCCOM connect page - @heclak (heclak)
+1. [A380X/FMC] Fix reset of perf data on done phase or database swap - @tracernz (Mike)
 
 ## 0.12.0
 

fbw-a380x/src/systems/instruments/src/MFD/FMC/FlightManagementComputer.ts

@@ -760,6 +760,7 @@ export class FlightManagementComputer implements FmcInterface {
         this.flightPlanService
           .reset()
           .then(() => {
+            this.fmgc.data.reset();
             this.initSimVars();
             this.deleteAllStoredWaypoints();
             this.clearLatestFmsErrorMessage();
@@ -990,6 +991,7 @@ export class FlightManagementComputer implements FmcInterface {
     // FIXME reset ATSU when it is added to A380X
     // this.atsu.resetAtisAutoUpdate();
     await this.flightPlanService.reset();
+    this.fmgc.data.reset();
     this.initSimVars();
     this.deleteAllStoredWaypoints();
     this.clearLatestFmsErrorMessage();

fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts

@@ -8,7 +8,7 @@ import { FlapConf } from '@fmgc/guidance/vnav/common';
 import { SpeedLimit } from '@fmgc/guidance/vnav/SpeedLimit';
 import { FmgcFlightPhase } from '@shared/flightphase';
 import { FmcWindVector, FmcWinds } from '@fmgc/guidance/vnav/wind/types';
-import { MappedSubject, Subject } from '@microsoft/msfs-sdk';
+import { MappedSubject, Subject, SubscribableUtils } from '@microsoft/msfs-sdk';
 import { FlightPlanIndex } from '@fmgc/flightplanning/FlightPlanManager';
 import { Arinc429Word, Runway, Units } from '@flybywiresim/fbw-sdk';
 import { Feet } from 'msfs-geo';
@@ -303,6 +303,24 @@ export class FmgcData {
    * Estimated take-off time, in seconds. Displays as HH:mm:ss. Null if not set
    */
   public readonly estimatedTakeoffTime = Subject.create<number | null>(null);
+
+  private readonly defaults = new Map<Extract<keyof FmgcData, string>, any>();
+
+  constructor() {
+    for (const prop in this) {
+      if (SubscribableUtils.isMutableSubscribable(this[prop])) {
+        this.defaults.set(prop as keyof FmgcData, this[prop].get());
+      }
+    }
+  }
+
+  public reset(): void {
+    for (const prop of this.defaults.keys()) {
+      if (SubscribableUtils.isMutableSubscribable(this[prop])) {
+        this[prop].set(this.defaults.get(prop));
+      }
+    }
+  }
 }
 
 /**