91 lines
4.3 KiB
C#
91 lines
4.3 KiB
C#
using Microsoft.Extensions.Hosting;
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using RazorLight;
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using System;
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using System.Collections.Generic;
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using System.Dynamic;
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using System.Net;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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using WebServer.Models;
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namespace WebServer {
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public abstract class AreaBase { // Formally `HttpEndpointHandler`
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// Provides razor pages, resources and relevent db tables and entities
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public readonly HttpServer Server;
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public readonly RazorLightEngine RazorEngine;
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public readonly string Hostname;
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public readonly string AreaPath;
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public readonly AreaBase? ParentArea;
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public AreaBase(HttpServer server, string host) : this(server, host, string.Empty) { }
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public AreaBase(HttpServer server, string host, string areaPath) {
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if (server == null) throw new ArgumentNullException(nameof(server));
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if (string.IsNullOrEmpty(host)) throw new ArgumentNullException(nameof(host));
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Server = server;
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RazorEngine = server.GetOrCreateRazorEngine(host);
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Hostname = host;
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AreaPath = areaPath ?? string.Empty;
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}
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public AreaBase(AreaBase parentArea, string relativeAreaPath) { // So you can build on top of other areas
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ParentArea = parentArea;
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Server = parentArea.Server;
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RazorEngine = parentArea.RazorEngine;
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Hostname = parentArea.Hostname;
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AreaPath = $"{parentArea.AreaPath}/{relativeAreaPath.Trim(' ', '/', '\\')}";
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}
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public static Uri BuildUri(HttpListenerRequest request, string path) {
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string uriString = $"{(request.IsSecureConnection ? "https" : "http")}://{request.UserHostName}/";
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if (string.IsNullOrEmpty(path))
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return new Uri(uriString);
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path = path.Replace('\\', '/');
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if (path[0] == '/')
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path = path.Substring(1);
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uriString += path;
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return new Uri(uriString);
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}
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#region Razor Stuff
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public async Task<HttpResponse> GetGenericStatusPageAsync(StatusPageModel model, ExpandoObject? viewBag = null) {
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return await Server.GetGenericStatusPageAsync(model, Hostname, viewBag);
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}
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public async Task<HttpResponse> GetGenericStatusPageAsync(HttpStatusCode statusCode, ExpandoObject? viewBag = null)
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=> await GetGenericStatusPageAsync(new StatusPageModel(statusCode), viewBag);
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/// <summary>Renders a View with a T model</summary>
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/// <typeparam name="T">Type of the model</typeparam>
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/// <param name="viewPath">The view path relative to the AreaName, keep in mind that prepending a '/' (or '\') will go to root of the top-most area</param>
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/// <param name="model">The model supplied to the view</param>
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/// <returns>A string of the compiled view</returns>
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public async Task<string> RenderAsync<T>(string viewPath, T model, ExpandoObject viewBag = null) { // Formally Try/GetTemplate
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viewPath = viewPath.Trim().Replace('\\', '/');
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string root = viewPath[0] == '/' ? "" : AreaPath;
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return await RazorEngine.CompileRenderAsync<T>($"{root}{viewPath}", model, viewBag);
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}
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#endregion
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#region Event Binds
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public Regex GetRegex(string regex) => new Regex(regex, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.CultureInvariant);
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public bool TryAddEventCallback(Regex regex, HttpServer.Callback callback)
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=> Server.TryAddEventCallback(Hostname, regex, callback);
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public void AddEventCallback(Regex regex, HttpServer.Callback callback) {
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if (!TryAddEventCallback(regex, callback))
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throw new Exception($"Error in Area '{AreaPath}'! Failed to bind event callback to `{callback.Method.Name}`");
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}
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public bool TryAddEventCallback(string regexPattern, HttpServer.Callback callback)
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=> TryAddEventCallback(GetRegex(regexPattern), callback);
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public void AddEventCallback(string regexPattern, HttpServer.Callback callback) {
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if (!TryAddEventCallback(regexPattern, callback))
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throw new Exception($"Error in Area '{AreaPath}'! Failed to bind event callback to `{callback.Method.Name}`");
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}
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#endregion
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}
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}
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