Gracefully handle invalid boosters in database (both itemIDs that don't exist as well as non-booster items). Implants need a little more work

eos/effectHandlerHelpers.py

@@ -233,10 +233,14 @@ class HandledImplantBoosterList(HandledList):
         self.__slotCache = {}
 
     def append(self, implant):
-        if self.__slotCache.has_key(implant.slot):
-            raise ValueError("Implant/Booster slot already in use, remove the old one first or set replace = True")
-        self.__slotCache[implant.slot] = implant
-        HandledList.append(self, implant)
+        try:
+            if self.__slotCache.has_key(implant.slot):
+                raise ValueError("Implant/Booster slot already in use, remove the old one first or set replace = True")
+            self.__slotCache[implant.slot] = implant
+            HandledList.append(self, implant)
+        except:
+            # if anything goes wrong, simply remove the item
+            eos.db.remove(implant)
 
     def remove(self, implant):
         HandledList.remove(self, implant)

eos/saveddata/booster.py

@@ -46,9 +46,13 @@ class Booster(HandledItem, ItemAttrShortcut):
 
     def __fetchItemInfo(self):
         import eos.db
-        self.__item = eos.db.getItem(self.itemID)
-        self.__slot = self.__calculateSlot(self.__item)
-        self.build()
+        item = eos.db.getItem(self.itemID)
+        if item:
+            self.__item = item
+            self.__slot = self.__calculateSlot(self.__item)
+            self.build()
+        else:
+            raise ValueError("Invalid item as Booster:", self.itemID)
 
     def iterSideEffects(self):
         return self.__sideEffects.__iter__()