feat: improve error handling

.gitignore

@@ -19,3 +19,4 @@ doc/api/
 *.js_
 *.js.deps
 *.js.map
+.flutter-plugins-dependencies

bin/config/web_scraping_config.dart

@@ -0,0 +1,54 @@
+/// Configuration for web scraping operations
+class WebScrapingConfig {
+  /// Maximum number of retry attempts for web scraping operations
+  static const int maxRetries = 3;
+
+  /// Base delay between retries (will be exponentially increased)
+  static const Duration baseRetryDelay = Duration(seconds: 2);
+
+  /// Rate limiting delay between requests to avoid being blocked
+  static const Duration rateLimitDelay = Duration(seconds: 10);
+
+  /// Timeout for web scraping operations
+  static const Duration timeout = Duration(seconds: 30);
+
+  /// User agent string to use for requests - looks like a regular browser
+  static const String userAgent =
+      'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36';
+
+  /// Maximum number of concurrent scraping operations
+  static const int maxConcurrentOperations = 2;
+
+  /// Whether to enable detailed logging
+  static const bool enableDetailedLogging = true;
+
+  /// Retry delays for different types of failures
+  static const Map<String, Duration> retryDelays = {
+    'network': Duration(seconds: 5),
+    'rate_limit': Duration(seconds: 30),
+    'server_error': Duration(seconds: 10),
+    'timeout': Duration(seconds: 15),
+  };
+
+  /// URLs that should be treated as rate-limited
+  static const List<String> rateLimitedDomains = [
+    'untappd.com',
+    'beerizer.com',
+  ];
+
+  /// Custom delays for specific domains
+  static const Map<String, Duration> domainDelays = {
+    'untappd.com': Duration(seconds: 15),
+    'beerizer.com': Duration(seconds: 10),
+  };
+
+  /// Get delay for a specific domain
+  static Duration getDelayForDomain(String domain) {
+    return domainDelays[domain] ?? rateLimitDelay;
+  }
+
+  /// Check if a domain should be rate-limited
+  static bool isRateLimitedDomain(String domain) {
+    return rateLimitedDomains.contains(domain);
+  }
+}

bin/main.dart

@@ -1,10 +1,17 @@
 import 'dart:io';
 
+import 'package:sentry/sentry.dart';
+
 import 'beer_bot.dart';
 
 String BOT_TOKEN = Platform.environment['DISCORD_TOKEN'] ?? '';
+String SENTRY_DSN = Platform.environment['SENTRY_DSN'] ?? '';
 
-void main(List<String> arguments) async {
-  // Initialize the bot
-  BeerBot().init(BOT_TOKEN);
+Future<void> main(List<String> arguments) async {
+  await Sentry.init(
+    (options) {
+      options.dsn = SENTRY_DSN;
+    },
+    appRunner: () => BeerBot().init(BOT_TOKEN),
+  );
 }