Improved substitution page

BetterIServ.Backend/Controllers/IServController.cs

@@ -0,0 +1,75 @@
+using BetterIServ.Backend.Entities;
+using HtmlAgilityPack;
+using Microsoft.AspNetCore.Mvc;
+using PuppeteerSharp;
+using Credentials = BetterIServ.Backend.Entities.Credentials;
+
+namespace BetterIServ.Backend.Controllers; 
+
+[ApiController]
+[Route("iserv")]
+public class AuthController : ControllerBase {
+    
+    [HttpPost("login")]
+    public async Task<ActionResult<AuthKeys>> GetAuthKeysV2([FromBody] Credentials credentials) {
+        await using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });
+        await using var page = await browser.NewPageAsync();
+        await page.GoToAsync($"https://{credentials.Domain}/iserv/auth/login");
+
+        await page.WaitForSelectorAsync("#form-username > input");
+        await page.Keyboard.TypeAsync(credentials.Username);
+        await page.Keyboard.PressAsync("Tab");
+        await page.Keyboard.TypeAsync(credentials.Password);
+        await page.ClickAsync("body > div > main > div > div.panel-body > form > div.row > div:nth-child(1) > button");
+        await Task.Delay(500);
+
+        var authKeys = new AuthKeys();
+        var cookies = await page.GetCookiesAsync();
+        foreach (var cookie in cookies) {
+            switch (cookie.Name) {
+                case "IServSession":
+                    authKeys.Session = cookie.Value;
+                    break;
+                case "IServSAT":
+                    authKeys.Sat = cookie.Value;
+                    break;
+                case "IServAuthSID":
+                    authKeys.AuthSid = cookie.Value;
+                    break;
+                case "IServSATId":
+                    authKeys.SatId = cookie.Value;
+                    break;
+                case "IServAuthSession":
+                    authKeys.AuthSession = cookie.Value;
+                    break;
+            }
+        }
+
+        return authKeys;
+    }
+
+    [HttpPost("groups")]
+    public async Task<ActionResult<SingleResult<string[]>>> GetCourses([FromBody] AuthKeys keys, [FromQuery] string domain) {
+        var client = new HttpClient();
+        var request = new HttpRequestMessage {
+            Method = HttpMethod.Get,
+            RequestUri = new Uri($"https://{domain}/iserv/profile"),
+            Headers = {
+                { "cookie", keys.ToCookieString() }
+            }
+        };
+        var raw = await (await client.SendAsync(request)).Content.ReadAsStringAsync();
+        var html = new HtmlDocument();
+        html.LoadHtml(raw);
+
+        var list = html.DocumentNode.SelectSingleNode("//body/div/div[2]/div[3]/div/div/div[2]/div/div/div/div/ul[1]");
+        var courses = new List<string>();
+        foreach (var child in list.ChildNodes) {
+            if (child.ChildNodes.Count < 1) continue;
+            courses.Add(child.ChildNodes[0].InnerText);
+        }
+        
+        return new SingleResult<string[]> { Value = courses.ToArray() };
+    }
+
+}