Implements some necessary code for the scrapper

Implements ignored salvage
Implements salvage-able items
Adds some TODOs
Implements salvage fail chance
Moves several methods to ItemHelper
Adds option for allowing extended salvage

src/main/resources/config.yml

@@ -122,6 +122,13 @@ scrapper:
     
     # Whether enchanted salvaged items should return some amount of exp upon salvage
     giveExperience: true
+    
+    # Items ignored during salvage calculation. This follows the format: "MATERIAL[,MATERIAL2][,MATERIAL3]:IGNORED", so 
+    # the material or materials listed will ignore the material specified after the ":" when calculating salvage 
+    # (* matches any character). This causes the player to lose some items during salvaging, but can prevent cases 
+    # where a diamond pickaxe is salvaged and only sticks are returned.
+    ignoredSalvage:
+      - "*_SHOVEL,*_PICKAXE,*_AXE,*_HOE,*_SWORD:STICK"
   
   # The settings which are set to any new scrapper NPC. To change any of these settings for an existing NPC, you must 
   # change the Citizens NPC file, or use the /scrapper command
@@ -150,6 +157,9 @@ scrapper:
     # The title describing the scrapper's usage/speciality (e.x armor-scrapper, tool-scrapper, weapon-scrapper)
     scrapperTitle: "scrapper"
     
+    # Whether to enable salvaging of non-repairable items, such as planks
+    extendedSalvageEnabled: false
+    
     # Default values for messages used by NPCs
     messages:
       # The message to display when another player is using the scrapper
@@ -177,4 +187,7 @@ scrapper:
       itemChangedMessage: "&cThat's not the item you wanted to salvage before!"
       
       # The message to display once the scrapper starts salvaging
-      startSalvageMessage: "&eOk, let's see what I can do..."
+      startSalvageMessage: "&eOk, let's see what I can do..."
+      
+      # The message to display when holding an item the blacksmith is unable to reforge
+      invalidItemMessage: "&cI'm sorry, but I'm a/an {title}, I don't know how to salvage that!"