Refactor and rename project to yawaflua.Discord.Net; add core entities and interfaces for Discord OAuth2 integration

Entities/OAuthToken.cs

@@ -1,16 +1,69 @@
-using Newtonsoft.Json;
+using System.Net.Http.Headers;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using yawaflua.Discord.Net.Interfaces.Models;
 
-namespace x3rt.DiscordOAuth2.Entities;
+namespace yawaflua.Discord.Net.Entities;
 
-public class OAuthToken
+internal class OAuthToken (HttpClient client, ulong ClientId, string ClientSecret) : IToken
 {
-    [JsonProperty("access_token")] public string AccessToken { get; set; }
+    [JsonPropertyName("access_token")] public string AccessToken { get; set; }
 
-    [JsonProperty("expires_in")] public int ExpiresIn { get; set; }
+    [JsonPropertyName("expires_in")] public int ExpiresIn { get; set; }
 
-    [JsonProperty("refresh_token")] public string RefreshToken { get; set; }
+    [JsonPropertyName("refresh_token")] public string RefreshToken { get; set; }
 
-    [JsonProperty("scope")] public string Scope { get; set; }
+    [JsonPropertyName("scope")] public string Scope { get; set; }
 
-    [JsonProperty("token_type")] public string TokenType { get; set; }
+    [JsonPropertyName("token_type")] public string TokenType { get; set; }
+    public Task RevokeAsync(CancellationToken cancellationToken = default)
+    {
+        using var request = new HttpRequestMessage(HttpMethod.Post, "https://discord.com/api/oauth2/token/revoke")
+        {
+            Content = new FormUrlEncodedContent(new Dictionary<string, string>
+            {
+                { "token", AccessToken },
+                { "client_id", ClientId.ToString() },
+                { "client_secret", ClientSecret }
+            })
+        };
+        return client.SendAsync(request, cancellationToken)
+            .ContinueWith(task =>
+            {
+                if (!task.Result.IsSuccessStatusCode)
+                {
+                    throw new Exception("Failed to revoke token.");
+                }
+            }, cancellationToken);
+    }
+
+    public async Task RefreshAsync(CancellationToken cancellationToken = default)
+    {
+        using var request = new HttpRequestMessage(HttpMethod.Post, "https://discord.com/api/oauth2/token")
+        {
+            Content = new FormUrlEncodedContent(new Dictionary<string, string>
+            {
+                { "grant_type", "refresh_token" },
+                { "refresh_token", RefreshToken },
+            })
+        };
+        var byteArray = System.Text.Encoding.ASCII.GetBytes($"{ClientId}:{ClientSecret}");
+        request.Headers.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));
+        var req = await client.SendAsync(request, cancellationToken);
+        if (!req.IsSuccessStatusCode)
+        {
+            throw new Exception("Failed to refresh token.");
+        }
+        var responseString = await req.Content.ReadAsStringAsync();
+        var newToken = JsonSerializer.Deserialize<OAuthToken>(responseString);
+        if (newToken is null)
+        {
+            throw new Exception("Failed to deserialize token.");
+        }
+        AccessToken = newToken.AccessToken;
+        ExpiresIn = newToken.ExpiresIn;
+        RefreshToken = newToken.RefreshToken;
+        Scope = newToken.Scope;
+        TokenType = newToken.TokenType;
+    }
 }