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manabrew_engine/staticability/
static_ability_cant_transform.rs

1use crate::card::{valid_filter, Card};
2use crate::spellability::SpellAbility;
3use crate::staticability::StaticMode;
4
5pub fn cant_transform(cards: &[Card], card: &Card, cause: Option<&SpellAbility>) -> bool {
6    for source in cards.iter().filter(|c| c.zone.is_static_ability_source()) {
7        for st_ab in source
8            .static_abilities
9            .iter()
10            .filter(|sa| sa.check_mode(&StaticMode::CantTransform) && sa.zones_check(source.zone))
11        {
12            if apply_cant_transform_ability(st_ab, card, source, cause) {
13                return true;
14            }
15        }
16    }
17    false
18}
19
20pub fn apply_cant_transform_ability(
21    st_ab: &crate::staticability::StaticAbility,
22    card: &Card,
23    source: &Card,
24    cause: Option<&SpellAbility>,
25) -> bool {
26    if !valid_filter::matches_valid_card_selector_opt(st_ab.ir.valid_card.as_ref(), card, source) {
27        return false;
28    }
29    // Java: if stAb.hasParam("ExceptCause") { if stAb.matchesValidParam("ExceptCause", cause) return false }
30    if let Some(except_cause) = st_ab.ir.except_cause_text.as_deref() {
31        if let Some(cause) = cause {
32            if matches_except_cause(except_cause, cause) {
33                return false;
34            }
35        }
36    }
37    true
38}
39
40/// Checks if the cause matches the ExceptCause filter.
41/// In Java, `matchesValidParam("ExceptCause", cause)` delegates to the same
42/// CardTraitBase validation used elsewhere. Here we reuse `matches_valid_cause`
43/// with the same token grammar (SpellAbility, Spell, Activated, etc.).
44fn matches_except_cause(except_cause: &str, cause: &SpellAbility) -> bool {
45    super::static_ability_cant_sacrifice::matches_valid_cause(Some(except_cause), Some(cause))
46}