From 081dd661214de32fed6570591ba7bc68846f7a94 Mon Sep 17 00:00:00 2001
From: KoalaTrapLord <265133236+KoalaTrapLord@users.noreply.github.com>
Date: Fri, 3 Apr 2026 11:17:27 -0400
Subject: [PATCH] fix: add startGameWithDecks() and loadPreconDeckFromDck() for
precon .dck loading into simulator
---
lan-client/precon-loader.js | 167 ++++++++++++++++++++++++++++++++++++
1 file changed, 167 insertions(+)
create mode 100644 lan-client/precon-loader.js
diff --git a/lan-client/precon-loader.js b/lan-client/precon-loader.js
new file mode 100644
index 0000000..cbffdb6
--- /dev/null
+++ b/lan-client/precon-loader.js
@@ -0,0 +1,167 @@
+/**
+ * precon-loader.js
+ * Handles loading precon .dck files from the backend into the lan-client simulator.
+ * Depends on: engine.js (gameState, initGame, drawCard, addLogEntry, renderPlayerPanels)
+ * ai-bridge.js (AIBridge.deckSource.fetchPreconDeck)
+ * ui.js (setupDeckChoices, setupPlayerCount, setupStartingLife)
+ */
+
+'use strict';
+
+// ============================================================
+// startGameWithDecks
+// Called by ui.js startGame() when players have selected precon decks.
+// Initialises the game state first, then async-loads each player's deck.
+// ============================================================
+async function startGameWithDecks() {
+ // Collect player names from the setup form
+ const playerNames = [];
+ for (let i = 0; i < (setupPlayerCount || 4); i++) {
+ const inp = document.getElementById('player-name-' + i);
+ playerNames.push(inp && inp.value.trim() ? inp.value.trim() : 'Player ' + (i + 1));
+ }
+
+ // Boot the game with empty zones first so the battlefield renders immediately
+ initGame(setupPlayerCount || 4, playerNames, setupStartingLife || 40);
+
+ // Now async-fill each player's zones from their chosen precon
+ const choices = typeof setupDeckChoices !== 'undefined' ? setupDeckChoices : {};
+ const loadPromises = Object.entries(choices).map(async ([idxStr, choice]) => {
+ const playerIdx = parseInt(idxStr, 10);
+ if (choice.type !== 'precon' || !choice.preconId) return;
+
+ try {
+ // Ensure fileName always ends with .dck
+ const fileName = choice.preconId.endsWith('.dck')
+ ? choice.preconId
+ : choice.preconId + '.dck';
+
+ const data = await AIBridge.deckSource.fetchPreconDeck(fileName);
+ if (!data || !data.decklist) {
+ addLogEntry('\u26A0 Could not load deck for Player ' + (playerIdx + 1) + ' (no decklist returned)');
+ return;
+ }
+
+ loadPreconDeckFromDck(playerIdx, data.decklist, choice.preconId);
+ } catch (e) {
+ console.warn('[precon-loader] Failed to load deck for player', playerIdx, e);
+ addLogEntry('\u26A0 Deck load failed for Player ' + (playerIdx + 1) + ': ' + e.message);
+ }
+ });
+
+ await Promise.all(loadPromises);
+
+ // Refresh the full UI after all decks are loaded
+ if (typeof renderPlayerPanels === 'function') renderPlayerPanels();
+ if (typeof updateActivePlayerHighlight === 'function') updateActivePlayerHighlight();
+}
+
+
+// ============================================================
+// loadPreconDeckFromDck
+// Parses a Forge-format .dck file string and populates a player's zones.
+//
+// Forge .dck format:
+// [metadata]
+// Name=Deck Name
+// [Commander]
+// 1 Lathril, Blade of the Elves
+// [Main]
+// 1 Sol Ring
+// ...
+// ============================================================
+function loadPreconDeckFromDck(playerIdx, dckContent, deckLabel) {
+ if (!gameState) return;
+ const player = gameState.players[playerIdx];
+ if (!player) return;
+
+ let commander = '';
+ let section = '';
+ const mainCards = [];
+
+ for (const rawLine of dckContent.split('\n')) {
+ const line = rawLine.trim();
+ if (!line || line.startsWith('//')) continue;
+
+ // Section headers: [Commander], [Main], [Sideboard], [metadata]
+ if (line.startsWith('[') && line.endsWith(']')) {
+ section = line.slice(1, -1);
+ continue;
+ }
+
+ // Skip metadata key=value lines
+ if (line.includes('=') && !line.match(/^\d/)) continue;
+
+ // Card lines: "1 Sol Ring" or "1 Sol Ring|ELD"
+ const m = line.match(/^(\d+)\s+(.+?)(?:\|.*)?$/);
+ if (!m) continue;
+
+ const qty = parseInt(m[1], 10);
+ const name = m[2].trim();
+
+ if (section === 'Commander') {
+ commander = name;
+ } else if (section === 'Main') {
+ for (let q = 0; q < qty; q++) {
+ mainCards.push(name);
+ }
+ }
+ // Sideboard is ignored for Commander
+ }
+
+ // Clear existing zones before populating
+ player.zones.command = [];
+ player.zones.library = [];
+ player.zones.hand = [];
+ player.zones.graveyard = [];
+ player.zones.exile = [];
+
+ // Populate command zone
+ if (commander) {
+ player.zones.command.push({
+ id: 'cmd-' + playerIdx + '-' + Date.now(),
+ name: commander,
+ imageUrl: '', // Scryfall fetch can enrich this later
+ typeLine: 'Legendary Creature',
+ oracleText: '',
+ manaCost: '',
+ });
+ player.commanderCardName = commander;
+ }
+
+ // Populate library
+ for (const cardName of mainCards) {
+ player.zones.library.push({
+ id: 'lib-' + playerIdx + '-' + cardName + '-' + Math.random().toString(36).slice(2, 6),
+ name: cardName,
+ imageUrl: '',
+ typeLine: '',
+ oracleText: '',
+ manaCost: '',
+ });
+ }
+
+ // Shuffle library (Fisher-Yates)
+ const lib = player.zones.library;
+ for (let i = lib.length - 1; i > 0; i--) {
+ const j = Math.floor(Math.random() * (i + 1));
+ [lib[i], lib[j]] = [lib[j], lib[i]];
+ }
+
+ // Draw opening hand (7 cards)
+ for (let d = 0; d < 7 && lib.length > 0; d++) {
+ player.zones.hand.push(lib.shift());
+ }
+
+ // Update UI for this player
+ if (typeof updateZoneCountsForPlayer === 'function') updateZoneCountsForPlayer(playerIdx);
+ if (typeof renderCommanderZone === 'function') renderCommanderZone(playerIdx);
+ if (typeof renderHandZone === 'function') renderHandZone(playerIdx);
+
+ const label = deckLabel ? deckLabel.replace('.dck', '') : 'Unknown Deck';
+ addLogEntry(
+ '\uD83C\uDCCF ' + player.name + ' loaded: ' + label + '' +
+ (commander ? ' — Commander: ' + commander + '' : '') +
+ ' (' + lib.length + ' in library, 7 in hand)'
+ );
+}