Add an abstract Database class

module/utils/databases/Database.mjs

@@ -0,0 +1,89 @@
+/* eslint-disable no-unused-vars */
+
+export class Database {
+	// MARK: Table Ops
+	static createTable(tableConfig) {
+		throw new Error(`createTable() must be defined`);
+	};
+
+	/** @returns {Array<Table>} */
+	static getTables() {
+		const tables = game.settings.get(__ID__, `tables`);
+		return Object.values(tables) ?? [];
+	};
+
+	static getTable(tableID) {
+		const tables = game.settings.get(__ID__, `tables`);
+		if (!tables[tableID]) { return };
+		return tables[tableID];
+	};
+
+	static deleteTable(tableID) {
+		throw new Error(`deleteTable() must be defined`);
+	};
+
+	// MARK: Row Ops
+	static createRow(table, userID, row) {
+		throw new Error(`createRow() must be implemented`);
+	};
+
+	static getRows(tableID, userIDs, privacy = `none`) {
+		throw new Error(`getRows() must be implemented`);
+	};
+
+	static updateRow(table, userID, rowID, changes) {
+		throw new Error(`updateRow() must be implemented`);
+	};
+
+	static deleteRow(table, userID, rowID) {
+		throw new Error(`deleteRow() must be implemented`);
+	};
+
+	// MARK: Applications
+	static _apps = new Map();
+
+	/**
+	 * Adds an application into the registry so that when a data update
+	 * is received, we can re-render the sheets.
+	 *
+	 * @param app an ApplicationV2 instance
+	 */
+	static addApp(app) {
+		this._apps.set(app.id, app);
+		this.registerListeners();
+	};
+
+	/**
+	 * Adds an application into the registry so that when a data update
+	 * is received, we can re-render the sheets.
+	 *
+	 * @param app an ApplicationV2 instance
+	 */
+	static removeApp(app) {
+		this._apps.delete(app.id);
+		if (this._apps.size === 0) {
+			this.unregisterListeners();
+		};
+	};
+
+	/**
+	 * Rerenders all of the applications that are displaying data from
+	 * this database
+	 */
+	static render() {
+		for (const app of Object.values(this.apps)) {
+			app.render();
+		};
+	};
+
+	// MARK: Listeners
+	/**
+	 * Used to listen for changes from other clients and rerender the apps
+	 * as required in order to keep the data as up-to-date as possible.
+	 */
+	static registerListeners() {};
+
+	static unregisterListeners() {};
+};
+
+/* eslint-enable no-unused-vars */

module/utils/databases/Memory.mjs

@@ -1,9 +1,9 @@
-/* eslint-disable no-unused-vars */
+import { Database } from "./Database.mjs";
 import { filterPrivateRows } from "../filterPrivateRows.mjs";
 
 const { randomID, mergeObject } = foundry.utils;
 
-export class MemoryDatabase {
+export class MemoryDatabase extends Database {
 	static #tables = {
 		"Dice/d10": {
 			name: `Dice/d10`,
@@ -14,7 +14,8 @@ export class MemoryDatabase {
 				max: 10,
 				step: 1,
 			},
-			config: {
+			graph: {
+				type: `bar`,
 				stacked: true,
 			},
 		},
@@ -74,8 +75,8 @@ export class MemoryDatabase {
 
 	static #rows = {};
 
+	/** @returns {Array<Table>} */
 	static getTables() {
-		/** @type {Array<{ name: string; }>} */
 		return Object.values(this.#tables);
 	};
 
@@ -146,5 +147,3 @@ export class MemoryDatabase {
 
 	static unregisterListeners() {};
 };
-
-/* eslint-enable no-unused-vars */