Missing Gwent Cards Tracker (Next-Gen Update) question

// https://www.nexusmods.com/witcher3/mods/7179?
// Missing Gwent Cards Tracker (Next-Gen Update)

// Diffs from modMissingCardTracker-7179-5-0-1671052024 vs stock patch 4.03.

// What dose these extra code-bits have to do with this Gwent mod, if anything?

// Note: I've removed some spacing that was added into the modded file, so the line numbers
// of the original mod @ Nexus may be a little off when searching your copy of the
// inventoryComponent.ws file.

// Line 312 of mod.
        var quality : int;

// Stock patch 4.03 @ line 312 is empty.

//-------------------------------------------

// Line 324 of mod.
		quality = RoundMath(CalculateAttributeValue( GetItemAttributeValue(item, 'quality' ) ) );
		if ( quality == 5 ) isWitcherGear = true;
		if ( quality == 4 ) isRelicGear = true;

// Stock patch 4.03 @ line 324.
		if ( RoundMath(CalculateAttributeValue( GetItemAttributeValue(item, 'quality' ) )) == 5 ) isWitcherGear = true;
		if ( RoundMath(CalculateAttributeValue( GetItemAttributeValue(item, 'quality' ) )) == 4 ) isRelicGear = true;

//-------------------------------------------

// Line 362 of mod.
			case 'bolt' :
				itemAttributes.PushBack( GetItemAttributeValue(item, 'SilverDamage') );
				break;

// Stock patch 4.03 @ line 351 is empty.

//-------------------------------------------

// Line 382 of mod.
		if ( itemCategory == 'bolt' )
		{
			if 		( quality == 5 ) level = level - 14;
			else if ( quality == 4 ) level = level - 10;
			else if ( quality == 3 ) level = level - 6;
			else if ( quality == 2 ) level = level - 4;
		}

		else if ( isWitcherGear ) level = level - 2;
		else if ( isRelicGear ) level = level - 1;

// Stock patch 4.03 @ line 366.
		if ( isWitcherGear ) level = level - 2;
		if ( isRelicGear ) level = level - 1;

//-------------------------------------------

// Line 775 of mod (added below stock code line 349).
				GetWitcherPlayer().DisplayHudMessage(GetLocStringByKeyExt("panel_alchemy_exception_already_cooked"));

// Stock patch 4.03 @ line 349.
				LogAssert(false, "CInventoryComponent.GiveItemTo: cannot add singleton item as player already has this item!");

//-------------------------------------------

// Line 1655 of mod.
			player.AddCraftingSchematic( itemName, player.GetInventory().ItemHasTag(item, 'NoNotification') );

// Stock patch 4.03 @ line 1629.
            player.AddCraftingSchematic( itemName );

//-------------------------------------------

// Line 2586 of mod.
				theGame.GetDefinitionsManager().GetAbilityAttributeValue( 'Runeword 10 _Stats', 'stamina_runeword_gain', min, max );

// Stock patch 4.03 @ line 2560.
				theGame.GetDefinitionsManager().GetAbilityAttributeValue( 'Runeword 10 _Stats', 'stamina', min, max );

//-------------------------------------------

// Line 2594 of mod.
				theGame.GetDefinitionsManager().GetAbilityAttributeValue( 'Runeword 12 _Stats', 'focus_runeword_gain', min, max );

// Stock patch 4.03 @ line 2568.
				theGame.GetDefinitionsManager().GetAbilityAttributeValue( 'Runeword 12 _Stats', 'focus', min, max );

//-------------------------------------------

// Line 2730 of mod.
			else if(buffType == EET_Cat && attrs[j] == 'critical_hit_chance')
			{
				newAttr.value = val.valueAdditive;
				newAttr.percentageValue = true;
			}

// Stock patch 4.03 @ line 2702.
			}

//-------------------------------------------

// Line 3885 of mod.
		if ( RoundMath( CalculateAttributeValue( GetItemAttributeValue( item, 'quality' ) ) ) == 5 && !ItemHasTag(item, 'noDye') )

// Stock patch 4.03 @ line 3852.
		if ( RoundMath( CalculateAttributeValue( GetItemAttributeValue( item, 'quality' ) ) ) == 5 )

//-------------------------------------------

// Line 3901 of mod.
			ItemHasTag(item, theGame.params.ITEM_SET_TAG_VIPER) ||
			ItemHasTag(item, theGame.params.ITEM_SET_TAG_NETFLIX);
	}

	public final function DetectTagOfASet(item : SItemUniqueId) : name
	{
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_BEAR) )
			return theGame.params.ITEM_SET_TAG_BEAR;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_GRYPHON) )
			return theGame.params.ITEM_SET_TAG_GRYPHON;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_LYNX) )
			return theGame.params.ITEM_SET_TAG_LYNX;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_WOLF) )
			return theGame.params.ITEM_SET_TAG_WOLF;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_RED_WOLF) )
			return theGame.params.ITEM_SET_TAG_RED_WOLF;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_VAMPIRE) )
			return theGame.params.ITEM_SET_TAG_VAMPIRE;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_VIPER) )
			return theGame.params.ITEM_SET_TAG_VIPER;
		if (ItemHasTag(item, theGame.params.ITEM_SET_TAG_NETFLIX) )
			return theGame.params.ITEM_SET_TAG_NETFLIX;

		return '';

// Stock patch 4.03 @ line 3868.
			ItemHasTag(item, theGame.params.ITEM_SET_TAG_VIPER);

//-------------------------------------------

// Line 4084 of mod.
		if(IsItemMask( item ))
			slot = EES_Quickslot2;

		if(slot == EES_Petard2)
			slot == EES_Petard1;

// Stock patch 4.03 @ line 4026 is empty.

//-------------------------------------------

// Line 4323 of mod.
			lvl = RoundF( playerLevel + RandRangeF( 3, 1 ) );

// Stock patch 4.03 @ line 4259.
			lvl = RoundF( playerLevel + RandRangeF( 1, 0 ) );

//-------------------------------------------

// Line 4667 of mod.
else
						{
							theGame.GetGamerProfile().NoticeAchievementProgress(EA_GwintCollector, foundCardsStringNames.Size(), allStringNamesOfCards.Size());
						}

// Stock patch 4.03 @ line 4602.
						}

//-------------------------------------------

// Line 5449 of mod (OKAY HERE'S THE MOD).
	//modMissingCardTracker start

// Line 5930 of mod (OKAY HERE'S THE MOD).
	//modMissingCardTracker stop

// So what's with those other codes added into the inventoryComponent.ws file that aren't stock patch 4.03 code?
// Maybe - weapon, armor, stats, crafting, etc. mods, that the Modder' had installed, before making this mod public?

// Can we just add the "commented" //modMissingCardTracker code and forget the rest of the additional "code changes"?

// I manually "diff" to add script mods myself, I'd like to know what code is truly required for "this" mod to work.

// Thanks!