| | | 1 | | /******************************************************************************** |
| | | 2 | | * RouterBuilder.cs * |
| | | 3 | | * * |
| | | 4 | | * Author: Denes Solti * |
| | | 5 | | ********************************************************************************/ |
| | | 6 | | using System; |
| | | 7 | | |
| | | 8 | | namespace NanoRoute |
| | | 9 | | { |
| | | 10 | | using Internals; |
| | | 11 | | |
| | | 12 | | /// <summary> |
| | | 13 | | /// Builds a concrete <see cref="Router"/> type together with its strongly typed configuration object. |
| | | 14 | | /// </summary> |
| | | 15 | | /// <typeparam name="TRouter">The router type produced by <see cref="CreateRouter"/>.</typeparam> |
| | | 16 | | /// <typeparam name="TConfig">The configuration type exposed by <see cref="RouterConfig"/>.</typeparam> |
| | | 17 | | /// <example> |
| | | 18 | | /// <code> |
| | | 19 | | /// MyRouter router = MyRouter |
| | | 20 | | /// .CreateBuilder() |
| | | 21 | | /// .AddDefaultValueParsers() |
| | | 22 | | /// .AddHandler("GET", "/health/", (context, _) => Results.Ok()) |
| | | 23 | | /// .CreateRouter(); |
| | | 24 | | /// </code> |
| | | 25 | | /// </example> |
| | | 26 | | public sealed class RouterBuilder<TRouter, TConfig> : RouteScopeBuilder where TRouter : Router where TConfig : Route |
| | | 27 | | { |
| | | 28 | | private readonly RouterFactoryDelegate<TRouter, TConfig> _routerFactory; |
| | | 29 | | |
| | | 30 | | /// <summary> |
| | | 31 | | /// Creates a builder that can produce <typeparamref name="TRouter"/> instances. |
| | | 32 | | /// </summary> |
| | | 33 | | /// <param name="routerFactory"> |
| | | 34 | | /// A factory that receives this builder and returns a router backed by its current route snapshot. |
| | | 35 | | /// </param> |
| | | 36 | | /// <exception cref="ArgumentNullException">Thrown when <paramref name="routerFactory"/> is <see langword="null" |
| | 2 | 37 | | public RouterBuilder(RouterFactoryDelegate<TRouter, TConfig> routerFactory) : base() |
| | 2 | 38 | | { |
| | 2 | 39 | | Ensure.NotNull(routerFactory); |
| | | 40 | | |
| | 2 | 41 | | _routerFactory = routerFactory; |
| | 2 | 42 | | } |
| | | 43 | | |
| | | 44 | | /// <summary> |
| | | 45 | | /// Registers a parser that can convert a route segment into a typed value and bind parser arguments once during |
| | | 46 | | /// </summary> |
| | | 47 | | /// <param name="parserName">The name used in route patterns such as <c>{id:int(min=1)}</c>.</param> |
| | | 48 | | /// <param name="bindArguments">Converts raw parser arguments into typed values once per route-template branch.< |
| | | 49 | | /// <param name="tryParseDelegate">The delegate that validates and parses a single path segment.</param> |
| | | 50 | | /// <returns>The current <see cref="RouterBuilder{TRouter, TConfig}"/> instance.</returns> |
| | | 51 | | /// <exception cref="ArgumentNullException"> |
| | | 52 | | /// Thrown when <paramref name="parserName"/>, <paramref name="bindArguments"/>, or |
| | | 53 | | /// <paramref name="tryParseDelegate"/> is <see langword="null"/>. |
| | | 54 | | /// </exception> |
| | | 55 | | /// <example> |
| | | 56 | | /// <code> |
| | | 57 | | /// builder.AddValueParser("slug", static rawArgs => null, static context => |
| | | 58 | | /// ValueTask.FromResult(new ValueParseResult(context.Segment.Length > 0, context.Segment.ToString()))); |
| | | 59 | | /// </code> |
| | | 60 | | /// </example> |
| | | 61 | | public new RouterBuilder<TRouter, TConfig> AddValueParser(string parserName, BindArgumentsDelegate bindArguments |
| | 1 | 62 | | { |
| | 1 | 63 | | base.AddValueParser(parserName, bindArguments, tryParseDelegate); |
| | 1 | 64 | | return this; |
| | 1 | 65 | | } |
| | | 66 | | |
| | | 67 | | /// <summary> |
| | | 68 | | /// Registers a handler for a single HTTP method. |
| | | 69 | | /// </summary> |
| | | 70 | | /// <param name="verb">The HTTP method that activates the handler.</param> |
| | | 71 | | /// <param name="pattern"> |
| | | 72 | | /// The route pattern to match. Literal segments are matched case-insensitively, parameter segments use |
| | | 73 | | /// registered parsers in the form <c>{parameterName:parserName}</c>. Exact patterns must end with |
| | | 74 | | /// <c>/</c>, and prefix patterns must end with <c>/*</c>. |
| | | 75 | | /// </param> |
| | | 76 | | /// <param name="handler"> |
| | | 77 | | /// The handler to execute. If several handlers match, calling the supplied <c>next</c> delegate continues |
| | | 78 | | /// the pipeline with the next compatible handler from the already selected route branch. |
| | | 79 | | /// </param> |
| | | 80 | | /// <returns>The current router instance.</returns> |
| | | 81 | | /// <exception cref="ArgumentNullException"> |
| | | 82 | | /// Thrown when <paramref name="verb"/>, <paramref name="pattern"/>, or <paramref name="handler"/> is |
| | | 83 | | /// <see langword="null"/>. |
| | | 84 | | /// </exception> |
| | | 85 | | /// <exception cref="ArgumentException">Thrown when <paramref name="verb"/> is not a supported HTTP method.</exc |
| | | 86 | | /// <exception cref="ArgumentException">Thrown when <paramref name="pattern"/> has invalid route-template syntax |
| | | 87 | | /// <exception cref="InvalidOperationException"> |
| | | 88 | | /// Thrown when <paramref name="pattern"/> uses an unsupported optional parameter or list parser, references |
| | | 89 | | /// a value parser that has not been registered yet, or reuses a parser-backed branch with a different |
| | | 90 | | /// parameter name. |
| | | 91 | | /// </exception> |
| | | 92 | | /// <example> |
| | | 93 | | /// <code> |
| | | 94 | | /// builder.AddHandler("GET", "/files/{path:any}/*", (context, next) => |
| | | 95 | | /// { |
| | | 96 | | /// string path = (string) context.Parameters["path"]!; |
| | | 97 | | /// return ServeFile(path); |
| | | 98 | | /// }); |
| | | 99 | | /// </code> |
| | | 100 | | /// </example> |
| | | 101 | | public new RouterBuilder<TRouter, TConfig> AddHandler(string verb, string pattern, RequestHandlerDelegate handle |
| | 2 | 102 | | { |
| | 2 | 103 | | base.AddHandler(verb, pattern, handler); |
| | 2 | 104 | | return this; |
| | 2 | 105 | | } |
| | | 106 | | |
| | | 107 | | /// <summary> |
| | | 108 | | /// Updates the router configuration object that will be used by future router instances. |
| | | 109 | | /// </summary> |
| | | 110 | | /// <param name="updateConfig">A callback that returns the updated <see cref="RouterConfig"/> instance.</param> |
| | | 111 | | /// <returns>The current builder.</returns> |
| | | 112 | | /// <exception cref="ArgumentNullException"> |
| | | 113 | | /// Thrown when <paramref name="updateConfig"/> is <see langword="null"/> or returns <see langword="null"/>. |
| | | 114 | | /// </exception> |
| | | 115 | | /// <example> |
| | | 116 | | /// <code> |
| | | 117 | | /// builder.ConfigureRouting(config => config with |
| | | 118 | | /// { |
| | | 119 | | /// MatchingPrecedence = MatchingPrecedence.ParameterizedFirst |
| | | 120 | | /// }); |
| | | 121 | | /// </code> |
| | | 122 | | /// </example> |
| | | 123 | | public RouterBuilder<TRouter, TConfig> ConfigureRouting(ConfigureBuilderDelegate<TConfig> updateConfig) |
| | 2 | 124 | | { |
| | 2 | 125 | | Ensure.NotNull(updateConfig); |
| | | 126 | | |
| | 2 | 127 | | RouterConfig = updateConfig(RouterConfig); |
| | 2 | 128 | | Ensure.NotNull(RouterConfig); |
| | | 129 | | |
| | 2 | 130 | | return this; |
| | 2 | 131 | | } |
| | | 132 | | |
| | | 133 | | /// <summary> |
| | | 134 | | /// Gets the configuration object applied when <see cref="CreateRouter"/> is called. |
| | | 135 | | /// </summary> |
| | 2 | 136 | | public TConfig RouterConfig { get; private set; } = new(); |
| | | 137 | | |
| | | 138 | | /// <summary> |
| | | 139 | | /// Creates a router from the builder's current routes, parser registrations, and configuration. |
| | | 140 | | /// </summary> |
| | | 141 | | /// <returns>A new <typeparamref name="TRouter"/> instance.</returns> |
| | | 142 | | /// <remarks> |
| | | 143 | | /// The created router is an immutable snapshot. Later changes to the builder or its configuration do not |
| | | 144 | | /// affect routers that have already been created. |
| | | 145 | | /// </remarks> |
| | | 146 | | /// <example> |
| | | 147 | | /// <code> |
| | | 148 | | /// MyRouter router = builder.CreateRouter(); |
| | | 149 | | /// </code> |
| | | 150 | | /// </example> |
| | 2 | 151 | | public TRouter CreateRouter() => _routerFactory(this); |
| | | 152 | | } |
| | | 153 | | } |
| | | 154 | | |