| | | 1 | | namespace TeleFlow.Telegram.Internal.Handlers; |
| | | 2 | | |
| | | 3 | | /// <summary> |
| | | 4 | | /// Pre-indexes Telegram error handlers so exception dispatch does not rebuild candidate groups per failure. |
| | | 5 | | /// </summary> |
| | | 6 | | internal sealed class TelegramErrorHandlerIndex |
| | | 7 | | { |
| | | 8 | | private readonly Dictionary<string, TelegramErrorHandlerGroup> _moduleGroups; |
| | | 9 | | private readonly TelegramErrorHandlerGroup _globalGroup; |
| | | 10 | | |
| | | 11 | | public TelegramErrorHandlerIndex(IEnumerable<TelegramErrorHandlerDescriptor> errorHandlers) |
| | | 12 | | { |
| | 201 | 13 | | ArgumentNullException.ThrowIfNull(errorHandlers); |
| | | 14 | | |
| | 201 | 15 | | var moduleGroups = new Dictionary<string, List<TelegramErrorHandlerDescriptor>>(StringComparer.Ordinal); |
| | 201 | 16 | | var globalHandlers = new List<TelegramErrorHandlerDescriptor>(); |
| | | 17 | | |
| | 644 | 18 | | foreach (var handler in errorHandlers) |
| | | 19 | | { |
| | 121 | 20 | | if (handler.ModuleName is null) |
| | | 21 | | { |
| | 70 | 22 | | globalHandlers.Add(handler); |
| | 70 | 23 | | continue; |
| | | 24 | | } |
| | | 25 | | |
| | 51 | 26 | | if (!moduleGroups.TryGetValue(handler.ModuleName, out var handlers)) |
| | | 27 | | { |
| | 51 | 28 | | handlers = []; |
| | 51 | 29 | | moduleGroups.Add(handler.ModuleName, handlers); |
| | | 30 | | } |
| | | 31 | | |
| | 51 | 32 | | handlers.Add(handler); |
| | | 33 | | } |
| | | 34 | | |
| | 201 | 35 | | _moduleGroups = new Dictionary<string, TelegramErrorHandlerGroup>(moduleGroups.Count, StringComparer.Ordinal); |
| | | 36 | | |
| | 504 | 37 | | foreach (var (moduleName, handlers) in moduleGroups) |
| | | 38 | | { |
| | 51 | 39 | | _moduleGroups.Add(moduleName, new TelegramErrorHandlerGroup(handlers)); |
| | | 40 | | } |
| | | 41 | | |
| | 201 | 42 | | _globalGroup = new TelegramErrorHandlerGroup(globalHandlers); |
| | 201 | 43 | | HasHandlers = _moduleGroups.Count > 0 || _globalGroup.HasHandlers; |
| | 201 | 44 | | } |
| | | 45 | | |
| | | 46 | | /// <summary> |
| | | 47 | | /// Gets whether the index contains at least one error handler. |
| | | 48 | | /// </summary> |
| | | 49 | | public bool HasHandlers { get; } |
| | | 50 | | |
| | | 51 | | /// <summary> |
| | | 52 | | /// Enumerates compatible error handlers in dispatcher invocation order. |
| | | 53 | | /// </summary> |
| | | 54 | | public IEnumerable<TelegramErrorHandlerDescriptor> GetCandidates( |
| | | 55 | | TelegramRouteSelection selection, |
| | | 56 | | TelegramUpdateContext telegramContext, |
| | | 57 | | Exception exception) |
| | | 58 | | { |
| | 21 | 59 | | ArgumentNullException.ThrowIfNull(selection); |
| | 21 | 60 | | ArgumentNullException.ThrowIfNull(telegramContext); |
| | 21 | 61 | | ArgumentNullException.ThrowIfNull(exception); |
| | | 62 | | |
| | 21 | 63 | | if (selection.Handler.ModuleName is { } moduleName && |
| | 21 | 64 | | _moduleGroups.TryGetValue(moduleName, out var moduleGroup)) |
| | | 65 | | { |
| | 12 | 66 | | foreach (var candidate in moduleGroup.GetCandidates(selection.RouteValues, telegramContext, exception)) |
| | | 67 | | { |
| | 4 | 68 | | yield return candidate; |
| | | 69 | | } |
| | | 70 | | } |
| | | 71 | | |
| | 55 | 72 | | foreach (var candidate in _globalGroup.GetCandidates(selection.RouteValues, telegramContext, exception)) |
| | | 73 | | { |
| | 18 | 74 | | yield return candidate; |
| | | 75 | | } |
| | 2 | 76 | | } |
| | | 77 | | |
| | | 78 | | private sealed class TelegramErrorHandlerGroup |
| | | 79 | | { |
| | | 80 | | private readonly Dictionary<Type, TelegramErrorHandlerDescriptor[]> _typedHandlers; |
| | | 81 | | private readonly TelegramErrorHandlerDescriptor[] _catchAllHandlers; |
| | | 82 | | |
| | | 83 | | public TelegramErrorHandlerGroup(IEnumerable<TelegramErrorHandlerDescriptor> handlers) |
| | | 84 | | { |
| | 252 | 85 | | ArgumentNullException.ThrowIfNull(handlers); |
| | | 86 | | |
| | 252 | 87 | | var typedHandlers = new Dictionary<Type, List<TelegramErrorHandlerDescriptor>>(); |
| | 252 | 88 | | var catchAllHandlers = new List<TelegramErrorHandlerDescriptor>(); |
| | | 89 | | |
| | 867 | 90 | | foreach (var handler in handlers.OrderBy(static handler => handler.RegistrationOrder)) |
| | | 91 | | { |
| | 121 | 92 | | if (handler.ExceptionType is null) |
| | | 93 | | { |
| | 29 | 94 | | catchAllHandlers.Add(handler); |
| | 29 | 95 | | continue; |
| | | 96 | | } |
| | | 97 | | |
| | 92 | 98 | | if (!typedHandlers.TryGetValue(handler.ExceptionType, out var typedGroup)) |
| | | 99 | | { |
| | 90 | 100 | | typedGroup = []; |
| | 90 | 101 | | typedHandlers.Add(handler.ExceptionType, typedGroup); |
| | | 102 | | } |
| | | 103 | | |
| | 92 | 104 | | typedGroup.Add(handler); |
| | | 105 | | } |
| | | 106 | | |
| | 252 | 107 | | _typedHandlers = new Dictionary<Type, TelegramErrorHandlerDescriptor[]>(typedHandlers.Count); |
| | | 108 | | |
| | 684 | 109 | | foreach (var (exceptionType, typedGroup) in typedHandlers) |
| | | 110 | | { |
| | 90 | 111 | | _typedHandlers.Add(exceptionType, typedGroup.ToArray()); |
| | | 112 | | } |
| | | 113 | | |
| | 252 | 114 | | _catchAllHandlers = catchAllHandlers.ToArray(); |
| | 252 | 115 | | HasHandlers = _typedHandlers.Count > 0 || _catchAllHandlers.Length > 0; |
| | 252 | 116 | | } |
| | | 117 | | |
| | | 118 | | public bool HasHandlers { get; } |
| | | 119 | | |
| | | 120 | | public IEnumerable<TelegramErrorHandlerDescriptor> GetCandidates( |
| | | 121 | | IReadOnlyDictionary<string, object?> routeValues, |
| | | 122 | | TelegramUpdateContext telegramContext, |
| | | 123 | | Exception exception) |
| | | 124 | | { |
| | 21 | 125 | | var exceptionType = exception.GetType(); |
| | | 126 | | |
| | 56 | 127 | | while (exceptionType is not null) |
| | | 128 | | { |
| | 48 | 129 | | if (_typedHandlers.TryGetValue(exceptionType, out var typedHandlers)) |
| | | 130 | | { |
| | 51 | 131 | | foreach (var handler in typedHandlers) |
| | | 132 | | { |
| | 17 | 133 | | if (IsCompatibleErrorHandler(handler, routeValues, telegramContext)) |
| | | 134 | | { |
| | 16 | 135 | | yield return handler; |
| | | 136 | | } |
| | | 137 | | } |
| | | 138 | | } |
| | | 139 | | |
| | 35 | 140 | | exceptionType = exceptionType.BaseType; |
| | | 141 | | } |
| | | 142 | | |
| | 22 | 143 | | foreach (var handler in _catchAllHandlers) |
| | | 144 | | { |
| | 6 | 145 | | if (IsCompatibleErrorHandler(handler, routeValues, telegramContext)) |
| | | 146 | | { |
| | 6 | 147 | | yield return handler; |
| | | 148 | | } |
| | | 149 | | } |
| | 2 | 150 | | } |
| | | 151 | | } |
| | | 152 | | |
| | | 153 | | private static bool IsCompatibleErrorHandler( |
| | | 154 | | TelegramErrorHandlerDescriptor handler, |
| | | 155 | | IReadOnlyDictionary<string, object?> routeValues, |
| | | 156 | | TelegramUpdateContext telegramContext) |
| | | 157 | | { |
| | 23 | 158 | | if (handler.TelegramContextType is not null && |
| | 23 | 159 | | !handler.TelegramContextType.IsInstanceOfType(telegramContext)) |
| | | 160 | | { |
| | 0 | 161 | | return false; |
| | | 162 | | } |
| | | 163 | | |
| | 23 | 164 | | if (!HasCompatibleRouteValues(handler, routeValues)) |
| | | 165 | | { |
| | 1 | 166 | | return false; |
| | | 167 | | } |
| | | 168 | | |
| | 22 | 169 | | return true; |
| | | 170 | | } |
| | | 171 | | |
| | | 172 | | private static bool HasCompatibleRouteValues( |
| | | 173 | | TelegramErrorHandlerDescriptor handler, |
| | | 174 | | IReadOnlyDictionary<string, object?> routeValues) |
| | | 175 | | { |
| | 161 | 176 | | foreach (var parameter in handler.Parameters) |
| | | 177 | | { |
| | 58 | 178 | | if (parameter.Kind != TelegramErrorHandlerParameterKind.RouteValue) |
| | | 179 | | { |
| | | 180 | | continue; |
| | | 181 | | } |
| | | 182 | | |
| | 3 | 183 | | if (!HasCompatibleRouteValue(parameter, routeValues)) |
| | | 184 | | { |
| | 1 | 185 | | return false; |
| | | 186 | | } |
| | | 187 | | } |
| | | 188 | | |
| | 22 | 189 | | return true; |
| | 1 | 190 | | } |
| | | 191 | | |
| | | 192 | | private static bool HasCompatibleRouteValue( |
| | | 193 | | TelegramErrorHandlerParameterDescriptor parameter, |
| | | 194 | | IReadOnlyDictionary<string, object?> routeValues) |
| | | 195 | | { |
| | 3 | 196 | | return TryGetRouteValue(parameter, routeValues, out var value) && |
| | 3 | 197 | | IsRouteValueAssignable(parameter.ParameterType, value); |
| | | 198 | | } |
| | | 199 | | |
| | | 200 | | private static bool TryGetRouteValue( |
| | | 201 | | TelegramErrorHandlerParameterDescriptor parameter, |
| | | 202 | | IReadOnlyDictionary<string, object?> routeValues, |
| | | 203 | | out object? value) |
| | | 204 | | { |
| | 3 | 205 | | value = null; |
| | | 206 | | |
| | 3 | 207 | | return !string.IsNullOrWhiteSpace(parameter.Name) && |
| | 3 | 208 | | routeValues.TryGetValue(parameter.Name, out value); |
| | | 209 | | } |
| | | 210 | | |
| | | 211 | | private static bool IsRouteValueAssignable(Type parameterType, object? value) |
| | | 212 | | { |
| | 3 | 213 | | if (value is null) |
| | | 214 | | { |
| | 0 | 215 | | return IsNullableRouteValue(parameterType); |
| | | 216 | | } |
| | | 217 | | |
| | 3 | 218 | | var targetType = Nullable.GetUnderlyingType(parameterType) ?? parameterType; |
| | | 219 | | |
| | 3 | 220 | | return targetType.IsInstanceOfType(value); |
| | | 221 | | } |
| | | 222 | | |
| | | 223 | | private static bool IsNullableRouteValue(Type parameterType) |
| | | 224 | | { |
| | 0 | 225 | | return !parameterType.IsValueType || |
| | 0 | 226 | | Nullable.GetUnderlyingType(parameterType) is not null; |
| | | 227 | | } |
| | | 228 | | } |