3 files changed, 164 insertions, 7 deletions

diff --git a/src/util/Config.ts b/src/util/Config.ts
index 5886b268..91ffda01 100644
--- a/src/util/Config.ts
+++ b/src/util/Config.ts
@@ -5,6 +5,7 @@ var Config: ProviderCache;
 
 export default {
 	init: async function init(opts: DefaultOptions = DefaultOptions) {
+		await db.collection("config").findOne({});
 		Config = await db.data.config({}).cache();
 		await Config.init();
 		await Config.set(opts.merge(Config.cache || {}));
diff --git a/src/util/Database.ts b/src/util/Database.ts
index ed45a9ad..56f53f9a 100644
--- a/src/util/Database.ts
+++ b/src/util/Database.ts
@@ -1,9 +1,89 @@
-import { MongoDatabase } from "lambert-db";
+import "./MongoBigInt";
+import mongoose, { Collection } from "mongoose";
+import { ChangeStream, ChangeEvent, Long } from "mongodb";
+import EventEmitter from "events";
+const uri = process.env.MONGO_URL || "mongodb://localhost:27017/fosscord?readPreference=secondaryPreferred";
 
-// TODO: load url from config
-const db = new MongoDatabase("mongodb://127.0.0.1:27017/lambert?readPreference=secondaryPreferred", {
-	useNewUrlParser: true,
-	useUnifiedTopology: false,
-});
+const connection = mongoose.createConnection(uri, { autoIndex: true });
 
-export default db;
+export default connection;
+
+export interface MongooseCache {
+	on(event: "delete", listener: (id: string) => void): this;
+	on(event: "change", listener: (data: any) => void): this;
+	on(event: "insert", listener: (data: any) => void): this;
+	on(event: "close", listener: () => void): this;
+}
+
+export class MongooseCache extends EventEmitter {
+	public stream: ChangeStream;
+	public data: any;
+
+	constructor(
+		public collection: Collection,
+		public pipeline: Array<Record<string, unknown>>,
+		public opts: {
+			onlyEvents: boolean;
+		}
+	) {
+		super();
+	}
+
+	async init() {
+		this.stream = this.collection.watch(this.pipeline, { fullDocument: "updateLookup" });
+
+		this.stream.on("change", this.change);
+		this.stream.on("close", this.destroy);
+		this.stream.on("error", console.error);
+
+		if (!this.opts.onlyEvents) {
+			this.data = await this.collection.aggregate(this.pipeline).toArray();
+		}
+	}
+
+	convertResult(obj: any) {
+		if (obj instanceof Long) return BigInt(obj.toString());
+		if (typeof obj === "object") {
+			Object.keys(obj).forEach((key) => {
+				obj[key] = this.convertResult(obj[key]);
+			});
+		}
+
+		return obj;
+	}
+
+	change = (doc: ChangeEvent) => {
+		// @ts-ignore
+		if (doc.fullDocument) {
+			// @ts-ignore
+			if (!this.opts.onlyEvents) this.data = doc.fullDocument;
+		}
+
+		switch (doc.operationType) {
+			case "dropDatabase":
+				return this.destroy();
+			case "drop":
+				return this.destroy();
+			case "delete":
+				return this.emit("delete", doc.documentKey._id.toHexString());
+			case "insert":
+				return this.emit("insert", doc.fullDocument);
+			case "update":
+			case "replace":
+				return this.emit("change", doc.fullDocument);
+			case "invalidate":
+				return this.destroy();
+			default:
+				return;
+		}
+	};
+
+	destroy() {
+		this.stream.off("change", this.change);
+		this.emit("close");
+
+		if (this.stream.isClosed()) return;
+
+		return this.stream.close();
+	}
+}
diff --git a/src/util/MongoBigInt.ts b/src/util/MongoBigInt.ts
new file mode 100644
index 00000000..cc185bed
--- /dev/null
+++ b/src/util/MongoBigInt.ts
@@ -0,0 +1,76 @@
+import mongoose from "mongoose";
+
+class LongSchema extends mongoose.SchemaType {
+	public $conditionalHandlers = {
+		$lt: this.handleSingle,
+		$lte: this.handleSingle,
+		$gt: this.handleSingle,
+		$gte: this.handleSingle,
+		$ne: this.handleSingle,
+		$in: this.handleArray,
+		$nin: this.handleArray,
+		$mod: this.handleArray,
+		$all: this.handleArray,
+		$bitsAnySet: this.handleArray,
+		$bitsAllSet: this.handleArray,
+	};
+
+	handleSingle(val: any) {
+		return this.cast(val);
+	}
+
+	handleArray(val: any) {
+		var self = this;
+		return val.map(function (m: any) {
+			return self.cast(m);
+		});
+	}
+
+	checkRequired(val: any) {
+		return null != val;
+	}
+
+	cast(val: any, scope?: any, init?: any) {
+		if (null === val) return val;
+		if ("" === val) return null;
+
+		if (val instanceof mongoose.mongo.Long) return BigInt(val.toString());
+		if (val instanceof Number || "number" == typeof val) return BigInt(val);
+		if (!Array.isArray(val) && val.toString) return BigInt(val.toString());
+
+		// @ts-ignore
+		throw new SchemaType.CastError("Long", val);
+	}
+
+	castForQuery($conditional: string, value: any) {
+		var handler;
+		if (2 === arguments.length) {
+			// @ts-ignore
+			handler = this.$conditionalHandlers[$conditional];
+			if (!handler) {
+				throw new Error("Can't use " + $conditional + " with Long.");
+			}
+			return handler.call(this, value);
+		} else {
+			return this.cast($conditional);
+		}
+	}
+}
+
+LongSchema.cast = mongoose.SchemaType.cast;
+LongSchema.set = mongoose.SchemaType.set;
+LongSchema.get = mongoose.SchemaType.get;
+
+declare module "mongoose" {
+	namespace Types {
+		class Long extends mongoose.mongo.Long {}
+	}
+	namespace Schema {
+		namespace Types {
+			class Long extends LongSchema {}
+		}
+	}
+}
+
+mongoose.Schema.Types.Long = LongSchema;
+mongoose.Types.Long = mongoose.mongo.Long;