feat: add database and table types for TypeScript

types/alasql.d.ts

@@ -82,6 +82,62 @@ declare module 'alasql' {
 		[x: string]: userFromFunction;
 	}
 
+	/**
+	* AlaSQL database object. This is a lightweight implimentation
+	*
+	* @interface database
+	*/
+	interface database {
+		/**
+		* The database ID.
+		*
+		* @type {string}
+		* @memberof database
+		*/
+		databaseid: string;
+
+		/**
+		* The collection of tables in the database.
+		*
+		* @type {tableLookUp}
+		* @memberof database
+		*/		
+		tables:  tableLookUp;
+	}
+
+	/**
+	* AlaSQL table object. This is a lightweight implimentation
+	*
+	* @interface table
+	*/
+	interface table {
+		/**
+		* The array of data stored in the table which can be queried
+		*
+		* @type {any[]}
+		* @memberof table
+		*/
+		data: any[];
+	}
+
+	/**
+	* AlaSQL database dictionary
+	*
+	* @interface databaseLookUp
+	*/	
+	interface databaseLookUp {
+		[databaseName: string]: database;
+	}
+
+	/**
+	* AlaSQL table dictionary
+	*
+	* @interface tableLookUp
+	*/
+	interface tableLookUp {	
+		[tableName: string]: table;
+	}	
+
 	interface AlaSQL {
 		options: AlaSQLOptions;
 		error: Error;
@@ -94,6 +150,43 @@ declare module 'alasql' {
 		autoval(tablename: string, colname: string, getNext?: boolean): number;
 		yy: {};
 		setXLSX(xlsxlib: typeof xlsx): void;
+
+		/**
+		* Array of databases in the AlaSQL object.
+		*
+		* @type {databaseLookUp}
+		* @memberof AlaSQL
+		*/		
+		databases: databaseLookUp;
+
+		/**
+		* Equivalent to alasql('USE '+databaseid). This will change the current
+		* database to the one specified. This will update the useid property and
+		* the tables property.
+		*
+		* @param {string} databaseid
+		* @memberof AlaSQL
+		*/
+		use (databaseid: string): void; 
+
+		/**
+		* The current database ID. If no database is selected, this is the
+		* default database ID (called alasql).
+		*
+		* @type {string}
+		* @memberof AlaSQL
+		*/		
+		useid: string;
+
+		/**
+		* Array of the tables in the default database (called alasql). If
+		* the database is changes via a USE statement or the use method, this
+		* becomes the tables in the new database.
+		*
+		* @type {tableLookUp}
+		* @memberof AlaSQL
+		*/		
+		tables: tableLookUp; 
 	}
 
 	const alasql: AlaSQL;