Add ResetIgnitions() method to MERF

Source/Engines/ModuleEngineConfigs.cs

@@ -219,6 +219,8 @@ public class ModuleEngineConfigsBase : PartModule, IPartCostModifier, IPartMassM
         public float origMass = -1;
         protected float massDelta = 0;
 
+        public int? Ignitions { get; protected set; }
+
         [KSPField]
         public string gimbalTransform = string.Empty;
         [KSPField]
@@ -824,15 +826,18 @@ protected void SetConfiguration(ConfigNode newConfig, bool resetTechLevels)
                 DoConfig(config);
 
                 HandleEngineIgnitor(config);
+
+                Ignitions = null;
                 if (config.HasValue("ignitions"))
                 {
-                    if (HighLogic.LoadedSceneIsFlight && vessel?.situation != Vessel.Situations.PRELAUNCH)
-                        config.RemoveValue("ignitions");
-                    else if (int.TryParse(config.GetValue("ignitions"), out int ignitions))
+                    if (int.TryParse(config.GetValue("ignitions"), out int tmpIgnitions))
                     {
-                        ignitions = ConfigIgnitions(ignitions);
-                        config.SetValue("ignitions", ignitions);
+                        Ignitions = ConfigIgnitions(tmpIgnitions);
+                        config.SetValue("ignitions", Ignitions.Value);
                     }
+
+                    if (HighLogic.LoadedSceneIsFlight && vessel?.situation != Vessel.Situations.PRELAUNCH)
+                        config.RemoveValue("ignitions");
                 }
 
                 // Trigger re-computation of the response rate if one is not set explicitly.

Source/Engines/ModuleEnginesRF.cs

@@ -756,6 +756,25 @@ public void SetScale(double newScale)
             scale = newScale;
             rfSolver?.SetScale(scale);
         }
+
+        /// <summary>
+        /// Used by the engine repair feature in RP-1.
+        /// </summary>
+        public void ResetIgnitions()
+        {
+            List<ModuleEngineConfigs> mecs = part.FindModulesImplementing<ModuleEngineConfigs>();
+            ModuleEngineConfigs matchingMEC = mecs.Find(m => m.pModule == this);
+            if (matchingMEC != null && matchingMEC.Ignitions.HasValue)
+            {
+                ignitions = matchingMEC.Ignitions.Value;
+            }
+            else
+            {
+                ModuleEnginesRF merf = part.FetchModuleFromPrefab(this);
+                if (merf != null)
+                    ignitions = merf.ignitions;
+            }
+        }
         #endregion
 
         #region Info

Source/Tanks/ModuleFuelTanks.cs

@@ -130,15 +130,7 @@ public override void OnAwake()
                 unmanagedResources = new Dictionary<string, UnmanagedResource>();
             else if (HighLogic.LoadedSceneIsFlight || HighLogic.LoadedSceneIsEditor)
             {
-                int index = part.Modules.IndexOf(this);
-                if (index < 0)
-                    index = part.Modules.Count;
-                Part prefab = part.partInfo.partPrefab;
-                ModuleFuelTanks mft;
-                if (prefab.Modules.Count > index && prefab.Modules[index] is ModuleFuelTanks m)
-                    mft = m;
-                else
-                    mft = prefab.FindModuleImplementing<ModuleFuelTanks>();
+                ModuleFuelTanks mft = part.FetchModuleFromPrefab(this);
                 unmanagedResources = mft.unmanagedResources;
                 typesAvailable = new List<TankDefinition>(mft.typesAvailable);  // Copy so any changes don't impact the prefab
                 allPossibleTypes = mft.allPossibleTypes;

Source/Utilities/Utilities.cs

@@ -275,5 +275,18 @@ public static void ResolveAndAddUnique(this IList<TankDefinition> defs, IEnumera
                 ResolveAndAddUnique(defs, name);
             }
         }
+
+        public static T FetchModuleFromPrefab<T>(this Part part, T pm)
+            where T : PartModule
+        {
+            int index = part.Modules.IndexOf(pm);
+            if (index < 0)
+                index = part.Modules.Count;    // during instantiation (OnAwake), when we are addcomponenting this module, we may not have added it to the Modules list
+            Part prefab = part.partInfo.partPrefab;
+            if (prefab.Modules.Count > index && prefab.Modules[index] is T m)
+                return m;
+            else
+                return prefab.FindModuleImplementing<T>();
+        }
     }
 }