01da007045
Add starters/php/ with complete starter kit for AI Code Battle: - index.php: HTTP server with HMAC verification, routing for /turn and /health - strategy.php: Stub compute_moves() function with example energy-seeking logic - game.php: Game state types (GameState, Position, VisibleBot, etc.) and grid utilities (toroidal_manhattan, toroidal_chebyshev, bfs, neighbors, cardinal_steps) - Dockerfile: Alpine-based PHP 8.4 container - README.md: Quickstart documentation with local/Docker run instructions - composer.json: Minimal composer config (no external dependencies) Follows same contract as other starters: - Listens on port 8080 (BOT_PORT env var) - POST /turn: Receives game state JSON, returns moves JSON - GET /health: Health check endpoint - HMAC-SHA256 signature verification on requests/responses Reference implementation: bots/guardian/ (GuardianBot in PHP) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
62 lines
1.9 KiB
PHP
62 lines
1.9 KiB
PHP
<?php
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/**
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* Strategy implementation for AI Code Battle.
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*
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* This file contains the compute_moves() function which is called each turn.
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* Implement your bot logic here.
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*
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* Available helpers from game.php:
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* - toroidal_manhattan(Position $a, Position $b, int $rows, int $cols): int
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* - toroidal_chebyshev(Position $a, Position $b, int $rows, int $cols): int
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* - bfs(Position $start, Position $goal, callable $passable, int $rows, int $cols): ?array
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* - cardinal_steps(Position $p, int $rows, int $cols): array
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*/
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/**
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* Compute moves for all owned bots.
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*
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* @param GameState $state The current game state
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* @return Move[] Array of move commands (bots not included stay in place)
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*/
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function compute_moves(GameState $state): array {
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$myId = $state->you->id;
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$config = $state->config;
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$rows = $config->rows;
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$cols = $config->cols;
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$moves = [];
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foreach ($state->bots as $bot) {
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if ($bot->owner !== $myId) {
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continue;
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}
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// Example: Find nearest energy and move toward it
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if (!empty($state->energy)) {
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$bestDist = PHP_INT_MAX;
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$bestDir = null;
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foreach (cardinal_steps($bot->position, $rows, $cols) as $step) {
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foreach ($state->energy as $energy) {
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$dist = toroidal_manhattan($step['pos'], $energy, $rows, $cols);
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if ($dist < $bestDist) {
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$bestDist = $dist;
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$bestDir = $step['dir'];
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}
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}
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}
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if ($bestDir) {
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$moves[] = new Move($bot->position, $bestDir);
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continue;
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}
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}
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// Default: hold position (don't add a move)
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// Or move randomly:
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// $directions = ['N', 'E', 'S', 'W'];
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// $moves[] = new Move($bot->position, $directions[array_rand($directions)]);
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}
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return $moves;
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}
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