1 files changed, 72 insertions, 0 deletions
diff --git a/src/util/connections/Connection.ts b/src/util/connections/Connection.ts
new file mode 100644
index 00000000..02104d39
--- /dev/null
+++ b/src/util/connections/Connection.ts
@@ -0,0 +1,72 @@
+import crypto from "crypto";
+import { ConnectedAccount } from "../entities";
+import { OrmUtils } from "../imports";
+import { ConnectionCallbackSchema } from "../schemas";
+import { DiscordApiErrors } from "../util";
+
+export default abstract class Connection {
+	id: string;
+	settings: { enabled: boolean };
+	states: Map<string, string> = new Map();
+
+	abstract init(): void;
+
+	/**
+	 * Generates an authorization url for the connection.
+	 * @param args
+	 */
+	abstract getAuthorizationUrl(userId: string): string;
+
+	/**
+	 * Processes the callback
+	 * @param args Callback arguments
+	 */
+	abstract handleCallback(params: ConnectionCallbackSchema): Promise<boolean>;
+
+	/**
+	 * Gets a user id from state
+	 * @param state the state to get the user id from
+	 * @returns the user id associated with the state
+	 */
+	getUserId(state: string): string {
+		if (!this.states.has(state)) throw DiscordApiErrors.INVALID_OAUTH_STATE;
+		return this.states.get(state) as string;
+	}
+
+	/**
+	 * Generates a state
+	 * @param user_id The user id to generate a state for.
+	 * @returns a new state
+	 */
+	createState(userId: string): string {
+		const state = crypto.randomBytes(16).toString("hex");
+		this.states.set(state, userId);
+
+		return state;
+	}
+
+	/**
+	 * Takes a state and checks if it is valid, and deletes it.
+	 * @param state The state to check.
+	 */
+	validateState(state: string): void {
+		if (!this.states.has(state)) throw DiscordApiErrors.INVALID_OAUTH_STATE;
+		this.states.delete(state);
+	}
+
+	async createConnection(data: any): Promise<void> {
+		const ca = OrmUtils.mergeDeep(new ConnectedAccount(), data);
+		await ca.save();
+	}
+
+	async hasConnection(userId: string, externalId: string): Promise<boolean> {
+		const existing = await ConnectedAccount.findOne({
+			where: {
+				user_id: userId,
+				external_id: externalId,
+			},
+		});
+
+		return !!existing;
+	}
+}