Rest API groundworks

Discord.API/Rest/GetGatewayResponse.cs

@@ -0,0 +1,6 @@
+namespace Discord.API.Rest;
+
+public readonly struct GetGatewayResponse
+{
+    public required string Url {get; init;}
+}

Discord.API/Rest/RestClient.cs

@@ -0,0 +1,39 @@
+using System.Text.Json;
+
+namespace Discord.API.Rest;
+
+internal class RestClient{
+
+    private HttpClient httpClient;
+
+    public RestClient(string base_url, string api_key){
+        httpClient = new HttpClient(){
+            BaseAddress=new Uri(base_url)
+        };
+        httpClient.DefaultRequestHeaders.Add("Authorization", $"Bot {api_key}");
+        httpClient.DefaultRequestHeaders.Add("User-Agent", $"DiscordBot ({Discord.API.StaticProperties.LibraryWebsite}, {Discord.API.StaticProperties.LibraryVersion})");
+    }
+
+    public async Task<RestResponse<GetGatewayResponse>> GetGateway() =>
+        await Get("gateway", s => JsonSerializer.Deserialize(s, SourceGenerationContext.Default.GetGatewayResponse));
+
+    private async Task<RestResponse<T>> Get<T>(string url, Func<string, T> deserializer){
+        try{
+            HttpResponseMessage resp = await httpClient.GetAsync(url);
+            if(resp.IsSuccessStatusCode){
+                return new RestSuccessResponse<T>(
+                    deserializer.Invoke(await resp.Content.ReadAsStringAsync()),
+                    resp.StatusCode
+                );
+            }else{
+                return new RestErrorResponse<T>(
+                    JsonSerializer.Deserialize(await resp.Content.ReadAsStringAsync(), SourceGenerationContext.Default.RestError),
+                    resp.StatusCode
+                );
+            }
+        }catch (Exception ex){
+            return new RestFailResponse<T>(ex);
+        }
+    }
+
+}

Discord.API/Rest/RestError.cs

@@ -0,0 +1,7 @@
+namespace Discord.API.Rest;
+
+public readonly struct RestError
+{
+    public required int Code {get; init;}
+    public required string Message {get; init;}
+}

Discord.API/Rest/RestErrorResponse.cs

@@ -0,0 +1,12 @@
+using System.Net;
+using Discord.API.Rest;
+
+namespace Discord.API;
+
+public class RestErrorResponse<T>(RestError error, HttpStatusCode code) : RestResponse<T>
+{
+    public override T Value => throw new InvalidOperationException();
+    public override HttpStatusCode StatusCode => code;
+    public override bool Success => false;
+    public override RestError Error => error;
+}

Discord.API/Rest/RestFailResponse.cs

@@ -0,0 +1,13 @@
+using System.Net;
+using Discord.API.Rest;
+
+namespace Discord.API;
+
+public class RestFailResponse<T>(Exception? ex) : RestResponse<T>
+{
+    public override T Value => throw new InvalidOperationException();
+    public override HttpStatusCode StatusCode => throw new InvalidOperationException();
+    public override bool Success => false;
+    public override RestError Error => throw new InvalidOperationException();
+    public Exception? Exception => ex;
+}

Discord.API/Rest/RestResponse.cs

@@ -0,0 +1,12 @@
+using System.Net;
+using Discord.API.Rest;
+
+namespace Discord.API;
+
+public abstract class RestResponse<T>
+{
+    public abstract T Value {get;}
+    public abstract HttpStatusCode StatusCode {get;}
+    public abstract bool Success {get;}
+    public abstract RestError Error {get;}
+}

Discord.API/Rest/RestSuccessResponse.cs

@@ -0,0 +1,11 @@
+using System.Net;
+
+namespace Discord.API.Rest;
+
+public class RestSuccessResponse<T>(T response, HttpStatusCode code) : RestResponse<T>
+{
+    public override T Value => response;
+    public override bool Success => true;
+    public override HttpStatusCode StatusCode => code;
+    public override RestError Error => throw new InvalidOperationException();
+}

Discord.API/SourceGenerationContext.cs

@@ -14,12 +14,8 @@ namespace Discord.API;
     NumberHandling = JsonNumberHandling.AllowReadingFromString
     )]
 [JsonSerializable(typeof(GatewayPacket))]
-[JsonSerializable(typeof(IdentifyPacket))]
-[JsonSerializable(typeof(ChannelCreatePacket))]
-[JsonSerializable(typeof(ChannelUpdatePacket))]
-[JsonSerializable(typeof(ChannelDeletePacket))]
-[JsonSerializable(typeof(DispatchPacket))]
-[JsonSerializable(typeof(ReadyPacket))]
+[JsonSerializable(typeof(Rest.GetGatewayResponse))]
+[JsonSerializable(typeof(Rest.RestError))]
 internal partial class SourceGenerationContext : JsonSerializerContext
 {
 }

discord_api.sln

@@ -3,7 +3,7 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "model", "model\model.csproj", "{2FA8D012-CC43-4FBC-9520-CF627AB4BBEA}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Discord.Model", "model\Discord.Model.csproj", "{2FA8D012-CC43-4FBC-9520-CF627AB4BBEA}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Discord.API", "Discord.API\Discord.API.csproj", "{5C77661B-670F-400B-AF77-E3EC062B673D}"
 EndProject
@@ -16,9 +16,6 @@ Global
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{2FA8D012-CC43-4FBC-9520-CF627AB4BBEA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{2FA8D012-CC43-4FBC-9520-CF627AB4BBEA}.Debug|Any CPU.Build.0 = Debug|Any CPU
@@ -37,4 +34,7 @@ Global
 		{E89333A2-11C4-4CFF-9F45-32D951E871CA}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E89333A2-11C4-4CFF-9F45-32D951E871CA}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
 EndGlobal