Add engine/events/mom_phone.asm and engine/link/mystery_gift_3.asm.

1 files changed, 231 insertions, 0 deletions

diff --git a/engine/events/mom_phone.asm b/engine/events/mom_phone.asm
new file mode 100644
index 00000000..cbd91327
--- /dev/null
+++ b/engine/events/mom_phone.asm
@@ -0,0 +1,231 @@
+NUM_MOM_ITEMS_1 EQUS "((MomItems_1.End - MomItems_1) / 8)"
+NUM_MOM_ITEMS_2 EQUS "((MomItems_2.End - MomItems_2) / 8)"
+
+	const_def 1
+	const MOM_ITEM
+	const MOM_DOLL
+
+MomTriesToBuySomething::
+	ld a, [wMapReentryScriptQueueFlag]
+	and a
+	ret nz
+	call GetMapPhoneService
+	and a
+	ret nz
+	xor a
+	ld [wWhichMomItemSet], a
+	call CheckBalance_MomItem2
+	ret nc
+	call Mom_GiveItemOrDoll
+	ret nc
+	ld b, BANK(.Script)
+	ld de, .Script
+	farcall LoadScriptBDE
+	scf
+	ret
+
+.Script:
+	callasm .ASMFunction
+	farsjump Script_ReceivePhoneCall
+
+.ASMFunction:
+	call MomBuysItem_DeductFunds
+	call Mom_GetScriptPointer
+	ld a, [wWhichMomItemSet]
+	and a
+	jr nz, .ok
+	ld hl, wWhichMomItem
+	inc [hl]
+.ok
+	ld a, PHONE_MOM
+	ld [wCurCaller], a
+	ld bc, wCallerContact
+	ld hl, PHONE_CONTACT_TRAINER_CLASS
+	add hl, bc
+	ld [hl], TRAINER_NONE
+	inc hl
+	ld [hl], PHONE_MOM
+	ld hl, PHONE_CONTACT_SCRIPT2_BANK
+	add hl, bc
+	ld a, BANK(Mom_GetScriptPointer)
+	ld [hli], a
+	ld a, e
+	ld [hli], a
+	ld a, d
+	ld [hl], a
+	ret
+
+CheckBalance_MomItem2:
+	ld a, [wWhichMomItem]
+	cp NUM_MOM_ITEMS_2
+	jr nc, .nope
+	call GetItemFromMom
+	ld a, [hli]
+	ldh [hMoneyTemp], a
+	ld a, [hli]
+	ldh [hMoneyTemp + 1], a
+	ld a, [hli]
+	ldh [hMoneyTemp + 2], a
+	ld de, wMomsMoney
+	ld bc, hMoneyTemp
+	farcall CompareMoney
+	jr nc, .have_enough_money
+
+.nope
+	jr .check_have_2300
+
+.have_enough_money
+	scf
+	ret
+
+.check_have_2300
+	ld hl, hMoneyTemp
+	ld [hl], HIGH(MOM_MONEY >> 8)
+	inc hl
+	ld [hl], HIGH(MOM_MONEY) ; mid
+	inc hl
+	ld [hl], LOW(MOM_MONEY)
+.loop
+	ld de, wMomItemTriggerBalance
+	ld bc, wMomsMoney
+	farcall CompareMoney
+	jr z, .exact
+	jr nc, .less_than
+	call .AddMoney
+	jr .loop
+
+.less_than
+	xor a
+	ret
+
+.exact
+	call .AddMoney
+	ld a, NUM_MOM_ITEMS_1
+	call RandomRange
+	inc a
+	ld [wWhichMomItemSet], a
+	scf
+	ret
+
+.AddMoney:
+	ld de, wMomItemTriggerBalance
+	ld bc, hMoneyTemp
+	farcall AddMoney
+	ret
+
+MomBuysItem_DeductFunds:
+	call GetItemFromMom
+	ld de, 3 ; cost
+	add hl, de
+	ld a, [hli]
+	ldh [hMoneyTemp], a
+	ld a, [hli]
+	ldh [hMoneyTemp + 1], a
+	ld a, [hli]
+	ldh [hMoneyTemp + 2], a
+	ld de, wMomsMoney
+	ld bc, hMoneyTemp
+	farcall TakeMoney
+	ret
+
+Mom_GiveItemOrDoll:
+	call GetItemFromMom
+	ld de, 6 ; item type
+	add hl, de
+	ld a, [hli]
+	cp MOM_ITEM
+	jr z, .not_doll
+	ld a, [hl]
+	ld c, a
+	ld b, 1
+	farcall DecorationFlagAction_c
+	scf
+	ret
+
+.not_doll
+	ld a, [hl]
+	ld [wCurItem], a
+	ld a, 1
+	ld [wItemQuantityChangeBuffer], a
+	ld hl, wNumPCItems
+	call ReceiveItem
+	ret
+
+Mom_GetScriptPointer:
+	call GetItemFromMom
+	ld de, 6 ; item type
+	add hl, de
+	ld a, [hli]
+	ld de, .ItemScript
+	cp MOM_ITEM
+	ret z
+	ld de, .DollScript
+	ret
+
+.ItemScript:
+	writetext MomHiHowAreYouText
+	writetext MomFoundAnItemText
+	writetext MomBoughtWithYourMoneyText
+	writetext MomItsInPCText
+	end
+
+.DollScript:
+	writetext MomHiHowAreYouText
+	writetext MomFoundADollText
+	writetext MomBoughtWithYourMoneyText
+	writetext MomItsInYourRoomText
+	end
+
+GetItemFromMom:
+	ld a, [wWhichMomItemSet]
+	and a
+	jr z, .zero
+	dec a
+	ld de, MomItems_1
+	jr .GetFromList1
+
+.zero
+	ld a, [wWhichMomItem]
+	cp NUM_MOM_ITEMS_2
+	jr c, .ok
+	xor a
+
+.ok
+	ld de, MomItems_2
+
+.GetFromList1:
+	ld l, a
+	ld h, 0
+rept 3 ; multiply hl by 8
+	add hl, hl
+endr
+	add hl, de
+	ret
+
+INCLUDE "data/items/mom_phone.asm"
+
+	db 0, 0, 0 ; unused
+
+MomHiHowAreYouText:
+	text_far _MomHiHowAreYouText
+	text_end
+
+MomFoundAnItemText:
+	text_far _MomFoundAnItemText
+	text_end
+
+MomBoughtWithYourMoneyText:
+	text_far _MomBoughtWithYourMoneyText
+	text_end
+
+MomItsInPCText:
+	text_far _MomItsInPCText
+	text_end
+
+MomFoundADollText:
+	text_far _MomFoundADollText
+	text_end
+
+MomItsInYourRoomText:
+	text_far _MomItsInYourRoomText
+	text_end