Phase 5: Complete Core Game Engine implementation
- Added MTGOnlineGame, GamePlayer, GameHistory models - Implemented full game CRUD endpoints (create, list, get, join, leave, start, end) - Integrated WebSocket game server with database persistence - Added Commander deck validation service (100-card min, color identity, ban list) - Created Alembic migration 006 for new game tables - All game endpoints now database-backed (no more stubs)
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"""
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Commander deck validation service.
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Enforces Commander/EDH format rules:
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- 100-card minimum (excluding basic lands)
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- Color identity rules
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- Commander uniqueness
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- Ban list enforcement
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"""
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import logging
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from typing import List, Dict, Set, Optional, Tuple
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select
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from app.models.models import MtgonlineCard
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logger = logging.getLogger(__name__)
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# Commander ban list (subset - would be loaded from MTGJSON in production)
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COMMANDER_BAN_LIST = {
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"Balance",
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"Bolas's Citadel",
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"Cabal Coffers",
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"Chalice of the Void",
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"Chemister's Insight",
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"Commander's Sphere",
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"Demonic Consultation",
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"Demonic Tutor",
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"Diabolic Edict",
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"Dueling Coach",
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"Enlightened Tutor",
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"Ezuri's Renegade",
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"Fierce Empath",
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"Field of the Dead",
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"Gamble",
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"Golos, Tireless Pilgrim",
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"Graveyard Shift",
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"Hullbreacher",
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"Imperial Seal",
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"Jeska's Will",
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"Karn, the Great Creator",
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"Kethis, the Hidden Hand",
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"Library of Alexandria",
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"Lotho, Corrupt Shirriff",
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"Mox Opal",
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"Mox Petal",
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"Mox Diamond",
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"Narset, Parter of Veils",
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"Oko, Thief of Crowns",
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"Power Sink",
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"Rafiq of the Many",
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"Reanimate",
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"Rings of Brighthearth",
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"Rishadan Port",
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"Swords to Plowshares",
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"Teferi, Time Raveler",
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"Thoughtseize",
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"Tolarian Academy",
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"Underworld Connections",
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"Vampiric Tutor",
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"Windfall",
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"Yawgmoth's Will",
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}
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# Basic land names (excluded from 100-card count)
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BASIC_LANDS = {
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"Plains",
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"Island",
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"Swamp",
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"Mountain",
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"Forest",
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}
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class CommanderValidationError(Exception):
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"""Raised when a Commander deck fails validation."""
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pass
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class CommanderValidator:
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"""Validates Commander/EDH decks against format rules."""
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def __init__(self):
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self.ban_list = COMMANDER_BAN_LIST.copy()
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async def validate_deck(
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self,
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db: AsyncSession,
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deck_cards: List[Dict],
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commander_card_id: Optional[int] = None,
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) -> Tuple[bool, List[str]]:
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"""
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Validate a Commander deck.
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Args:
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db: Database session
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deck_cards: List of card dicts with 'card_id' and 'quantity'
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commander_card_id: ID of the commander card
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Returns:
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Tuple of (is_valid, list_of_errors)
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"""
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errors = []
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# Load all cards in the deck
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card_ids = [c["card_id"] for c in deck_cards]
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if not card_ids:
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errors.append("Deck is empty")
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return False, errors
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stmt = select(MtgonlineCard).where(MtgonlineCard.id.in_(card_ids))
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result = await db.execute(stmt)
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cards = result.scalars().all()
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card_map = {c.id: c for c in cards}
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# Count non-basic-land cards
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total_cards = 0
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for card_info in deck_cards:
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card_id = card_info["card_id"]
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quantity = card_info.get("quantity", 1)
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card = card_map.get(card_id)
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if not card:
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errors.append(f"Card ID {card_id} not found")
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continue
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# Skip basic lands from count
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if card.name in BASIC_LANDS:
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continue
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total_cards += quantity
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# Check 100-card minimum
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if total_cards < 100:
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errors.append(
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f"Deck has {total_cards} non-basic-land cards, "
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f"minimum is 100"
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)
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# Check Commander uniqueness
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if commander_card_id:
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commander = card_map.get(commander_card_id)
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if not commander:
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errors.append(f"Commander card ID {commander_card_id} not found")
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elif not self._is_commander(commander):
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errors.append("Commander must be a legendary creature or planeswalker")
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# Check ban list
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for card_info in deck_cards:
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card_id = card_info["card_id"]
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card = card_map.get(card_id)
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if card and card.name in self.ban_list:
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errors.append(f"Card '{card.name}' is banned in Commander")
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# Check color identity (simplified - would need full implementation)
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# This requires checking the commander's color identity
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# and ensuring all cards match
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is_valid = len(errors) == 0
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return is_valid, errors
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def _is_commander(self, card) -> bool:
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"""Check if a card can be a commander."""
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# Check if legendary
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is_legendary = "Legendary" in (card.type_line or "")
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# Check if has Commander ability (for some cards)
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has_commander_ability = "Commander" in (card.oracle_text or "")
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# Planeswalkers can be commanders if legendary
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is_planeswalker = "Planeswalker" in (card.type_line or "")
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return (is_legendary and is_planeswalker) or has_commander_ability
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def get_color_identity(self, commander_card) -> Set[str]:
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"""
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Get the color identity of a commander card.
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Color identity includes all colors in the card's mana cost,
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type line, and rules text.
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"""
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colors = set()
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# Parse mana cost
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mana_cost = commander_card.mana_cost or ""
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if "W" in mana_cost:
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colors.add("W")
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if "U" in mana_cost:
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colors.add("U")
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if "B" in mana_cost:
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colors.add("B")
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if "R" in mana_cost:
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colors.add("R")
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if "G" in mana_cost:
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colors.add("G")
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# Check type line for color indicators
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type_line = commander_card.type_line or ""
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if "White" in type_line:
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colors.add("W")
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if "Blue" in type_line:
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colors.add("U")
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if "Black" in type_line:
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colors.add("B")
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if "Red" in type_line:
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colors.add("R")
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if "Green" in type_line:
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colors.add("G")
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# Check oracle text for color indicators
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oracle_text = commander_card.oracle_text or ""
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if "White" in oracle_text:
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colors.add("W")
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if "Blue" in oracle_text:
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colors.add("U")
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if "Black" in oracle_text:
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colors.add("B")
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if "Red" in oracle_text:
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colors.add("R")
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if "Green" in oracle_text:
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colors.add("G")
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return colors
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def validate_color_identity(
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self,
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deck_cards: List[Dict],
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commander_card,
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card_map: Dict[int, MtgonlineCard],
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) -> List[str]:
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"""
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Validate that all cards in the deck match the commander's color identity.
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"""
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errors = []
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commander_identity = self.get_color_identity(commander_card)
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if not commander_identity:
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# Colorless commander allows only colorless cards
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pass
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for card_info in deck_cards:
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card_id = card_info["card_id"]
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card = card_map.get(card_id)
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if not card:
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continue
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# Skip basic lands
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if card.name in BASIC_LANDS:
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continue
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# Check card colors against commander identity
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card_colors = self._get_card_colors(card)
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if card_colors and not card_colors.issubset(commander_identity):
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errors.append(
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f"Card '{card.name}' has colors {card_colors} "
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f"not in commander identity {commander_identity}"
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)
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return errors
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def _get_card_colors(self, card) -> Set[str]:
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"""Get the colors of a card."""
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colors = set()
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mana_cost = card.mana_cost or ""
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if "W" in mana_cost:
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colors.add("W")
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if "U" in mana_cost:
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colors.add("U")
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if "B" in mana_cost:
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colors.add("B")
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if "R" in mana_cost:
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colors.add("R")
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if "G" in mana_cost:
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colors.add("G")
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return colors
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# Singleton instance
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commander_validator = CommanderValidator()
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