1 files changed, 83 insertions, 0 deletions
diff --git a/src/api/util/handlers/Oauth.ts b/src/api/util/handlers/Oauth.ts
new file mode 100644
index 00000000..cc662161
--- /dev/null
+++ b/src/api/util/handlers/Oauth.ts
@@ -0,0 +1,83 @@
+// TODO: Puyo's connections PR would replace this file
+
+import { Config } from "@fosscord/util";
+import fetch from "node-fetch";
+
+export interface OauthAccessToken {
+	access_token: string;
+	token_type: string;
+	expires_in: string;
+	refresh_token: string;
+	scope: string;
+};
+
+export interface OauthUserDetails {
+	id: string;
+	email: string;
+	username: string;
+	avatar_url: string | null;
+}
+
+interface Connection {
+	getAccessToken: (code: string) => Promise<OauthAccessToken>;
+	getUserDetals: (token: string) => Promise<OauthUserDetails>;
+}
+
+const DiscordConnection: Connection = {
+	getAccessToken: async (code) => {
+		const { external } = Config.get();
+		const { discord } = external;
+
+		if (!discord.id || !discord.secret || !discord.redirect)
+			throw new Error("Discord Oauth has not been configured.")
+
+		const body = new URLSearchParams(
+			Object.entries({
+				client_id: discord.id as string,
+				client_secret: discord.secret as string,
+				redirect_uri: discord.redirect as string,
+				code: code as string,
+				grant_type: "authorization_code",
+			})
+		).toString();
+
+		const resp = await fetch("https://discord.com/api/oauth2/token", {
+			method: "POST",
+			headers: {
+				"Content-Type": "application/x-www-form-urlencoded",
+			},
+			body: body,
+		});
+		if (resp.status !== 200) throw new Error(`Failed to get access token.`,);
+
+		const json = await resp.json();
+
+		return json;
+	},
+
+	getUserDetals: async (token) => {
+		const resp = await fetch("https://discord.com/api/users/@me", {
+			headers: {
+				Authorization: `Bearer ${token}`
+			},
+		});
+
+		const json = await resp.json();
+		if (!json.username || !json.email) throw new Error("Failed to get user details via oauth");
+
+		return {
+			id: json.id,
+			email: json.email,
+			username: json.username,
+			avatar_url: json.avatar
+				? `https://cdn.discordapp.com/avatars/${json.id}/${json.avatar}?size=2048`
+				: null,
+		};
+	}
+};
+
+const OauthCallbackHandlers: { [key: string]: Connection; } = {
+	discord: DiscordConnection
+};
+
+export { OauthCallbackHandlers };
\ No newline at end of file