5 files changed, 225 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;
+	}
+}
diff --git a/src/util/connections/ConnectionConfig.ts b/src/util/connections/ConnectionConfig.ts
new file mode 100644
index 00000000..9b120c93
--- /dev/null
+++ b/src/util/connections/ConnectionConfig.ts
@@ -0,0 +1,79 @@
+import { ConnectionConfigEntity } from "../entities/ConnectionConfigEntity";
+
+let config: any;
+let pairs: ConnectionConfigEntity[];
+
+export const ConnectionConfig = {
+	init: async function init() {
+		if (config) return config;
+		console.log("[ConnectionConfig] Loading configuration...");
+		pairs = await ConnectionConfigEntity.find();
+		config = pairsToConfig(pairs);
+
+		return this.set(config);
+	},
+	get: function get() {
+		if (!config) {
+			return {};
+		}
+		return config;
+	},
+	set: function set(val: Partial<any>) {
+		if (!config || !val) return;
+		config = val.merge(config);
+		console.debug("config", config); // TODO: if no more issues with sql, remove this or find the reason why it's happening
+
+		return applyConfig(config);
+	},
+};
+
+function applyConfig(val: any) {
+	async function apply(obj: any, key = ""): Promise<any> {
+		if (typeof obj === "object" && obj !== null && !(obj instanceof Date))
+			return Promise.all(
+				Object.keys(obj).map((k) =>
+					apply(obj[k], key ? `${key}_${k}` : k),
+				),
+			);
+
+		let pair = pairs.find((x) => x.key === key);
+		if (!pair) pair = new ConnectionConfigEntity();
+
+		pair.key = key;
+
+		if (pair.value !== obj) {
+			pair.value = obj;
+			if (!pair.key || pair.key == null) {
+				console.log(`[ConnectionConfig] WARN: Empty key`);
+				console.log(pair);
+			} else return pair.save();
+		}
+	}
+
+	return apply(val);
+}
+
+function pairsToConfig(pairs: ConnectionConfigEntity[]) {
+	let value: any = {};
+
+	pairs.forEach((p) => {
+		const keys = p.key.split("_");
+		let obj = value;
+		let prev = "";
+		let prevObj = obj;
+		let i = 0;
+
+		for (const key of keys) {
+			if (!isNaN(Number(key)) && !prevObj[prev]?.length)
+				prevObj[prev] = obj = [];
+			if (i++ === keys.length - 1) obj[key] = p.value;
+			else if (!obj[key]) obj[key] = {};
+
+			prev = key;
+			prevObj = obj;
+			obj = obj[key];
+		}
+	});
+
+	return value;
+}
diff --git a/src/util/connections/ConnectionLoader.ts b/src/util/connections/ConnectionLoader.ts
new file mode 100644
index 00000000..d06a6446
--- /dev/null
+++ b/src/util/connections/ConnectionLoader.ts
@@ -0,0 +1,65 @@
+import fs from "fs";
+import path from "path";
+import { OrmUtils } from "../imports";
+import Connection from "./Connection";
+import { ConnectionConfig } from "./ConnectionConfig";
+import { ConnectionStore } from "./ConnectionStore";
+
+const root = "dist/connections";
+let connectionsLoaded = false;
+
+export class ConnectionLoader {
+	public static async loadConnections() {
+		if (connectionsLoaded) return;
+		ConnectionConfig.init();
+		const dirs = fs.readdirSync(root).filter((x) => {
+			try {
+				fs.readdirSync(path.join(root, x));
+				return true;
+			} catch (e) {
+				return false;
+			}
+		});
+
+		dirs.forEach(async (x) => {
+			let modPath = path.resolve(path.join(root, x));
+			console.log(`Loading connection: ${modPath}`);
+			const mod = new (require(modPath).default)() as Connection;
+			ConnectionStore.connections.set(mod.id, mod);
+
+			mod.init();
+			console.log(`[Connections] Loaded connection '${mod.id}'`);
+		});
+	}
+
+	public static getConnectionConfig(id: string, defaults?: any): any {
+		let cfg = ConnectionConfig.get()[id];
+		if (defaults) {
+			if (cfg) cfg = OrmUtils.mergeDeep(defaults, cfg);
+			else cfg = defaults;
+			this.setConnectionConfig(id, cfg);
+		}
+
+		if (!cfg)
+			console.log(
+				`[ConnectionConfig/WARN] Getting connection settings for '${id}' returned null! (Did you forget to add settings?)`,
+			);
+		return cfg;
+	}
+
+	public static async setConnectionConfig(
+		id: string,
+		config: Partial<any>,
+	): Promise<void> {
+		if (!config)
+			console.log(
+				`[ConnectionConfig/WARN] ${id} tried to set config=null!`,
+			);
+		await ConnectionConfig.set({
+			[id]: OrmUtils.mergeDeep(
+				ConnectionLoader.getConnectionConfig(id) || {},
+				config,
+			),
+		});
+	}
+}
diff --git a/src/util/connections/ConnectionStore.ts b/src/util/connections/ConnectionStore.ts
new file mode 100644
index 00000000..406e8232
--- /dev/null
+++ b/src/util/connections/ConnectionStore.ts
@@ -0,0 +1,5 @@
+import Connection from "./Connection";
+
+export class ConnectionStore {
+	public static connections: Map<string, Connection> = new Map();
+}
diff --git a/src/util/connections/index.ts b/src/util/connections/index.ts
new file mode 100644
index 00000000..e15d0c8c
--- /dev/null
+++ b/src/util/connections/index.ts
@@ -0,0 +1,4 @@
+export * from "./Connection";
+export * from "./ConnectionConfig";
+export * from "./ConnectionLoader";
+export * from "./ConnectionStore";