feat: Implement consumable item effects (Pineapple, Honeycomb) and consumption logic with error handling

Items/all_items.asm

@@ -1,4 +1,6 @@
 ; Inherits Free Space from Bank07
+org $07FA80
+!RAM_MAGIC = $7EF36E
 incsrc "Items/bottle_net.asm"
 
 ; Starts Expanded Bank 0x2B
@@ -42,36 +44,44 @@ Link_ConsumeMagicBagItem:
 
   Link_Banana:
   {
-    LDA.l CURHP : CMP.w MAXHP : BCS +
+    LDA.l CURHP : CMP.w MAXHP : BCS .full
       LDA.l CURHP : CLC : ADC.b #$10 : STA.l CURHP
-      LDA.b #$0D : STA.w $012F ; HUD Heart SFX
-    +
-    RTS
+      SEC : RTS
+    .full
+    CLC : RTS
   }
 
   Link_Pineapple:
   {
-    RTS
+    LDA.l !RAM_MAGIC : CMP.b #$80 : BCS .full
+      LDA.b #$80 : STA.l !RAM_MAGIC
+      SEC : RTS
+    .full
+    CLC : RTS
   }
 
   Link_RockMeat:
   {
-    RTS
+    CLC : RTS
   }
 
   Link_Seashells:
   {
-    RTS
+    CLC : RTS
   }
 
   Link_Honeycombs:
   {
-    RTS
+    LDA.l CURHP : CMP.w MAXHP : BCS .full
+      LDA.l CURHP : CLC : ADC.b #$10 : STA.l CURHP
+      SEC : RTS
+    .full
+    CLC : RTS
   }
 
   Link_DekuSticks:
   {
-    RTS
+    CLC : RTS
   }
 
 }

Menu/menu.asm

@@ -499,6 +499,7 @@ Menu_MagicBag:
   REP #$10
   LDX.w Menu_MagicBagCursorPositions, Y
   JSR Menu_DrawCursor
+  JSR MagicBag_ConsumeItem
   JSR Submenu_Return
 
   LDA.b #$22 : STA.w $0116
@@ -515,6 +516,53 @@ Menu_MagicBagCursorPositions:
   dw menu_offset(12,10) ; honeycombs
   dw menu_offset(12,14) ; deku sticks
 
+MagicBag_ConsumeItem:
+{
+    ; Check for A button press
+    LDA.b $F6 : BIT.b #$80 : BEQ .exit
+    
+    REP #$30
+    ; Calculate SRAM address for current item (4 bytes per entry)
+    LDA.w $020B : ASL #2 : TAX
+    LDA.l .sram_addresses, X : STA $00
+    LDA.l .sram_addresses+2, X : STA $02
+    SEP #$30
+
+    ; Handle Consumption
+    PHB : LDA $02 : PHA : PLB
+    LDA ($00) : BEQ .error_dbr
+    
+    ; Call Handler
+    JSL Link_ConsumeMagicBagItem
+    BCC .failed_use_dbr
+    
+    ; Success -> Decrement
+    LDA ($00) : DEC A : STA ($00)
+    PLB
+    
+    ; Sound
+    LDA.b #$35 : STA.w $012F
+    BRA .exit
+
+.failed_use_dbr
+    PLB
+.error_dbr
+    ; Error Sound
+    LDA.b #$3C : STA.w $012E
+    BRA .exit
+
+.exit
+    RTS
+
+.sram_addresses
+    dd Bananas
+    dd Pineapples
+    dd RockMeat
+    dd Seashells
+    dd Honeycomb
+    dd DekuSticks
+}
+
 ; =========================================================
 ; 0D MENU SONG MENU