types.d.ts

/**
 * This is an adaptation of https://github.com/doxout/anydb-sql/blob/4e4c0ff4a7f2efb7f820baaafea1f624f1ae0399/d.ts/anydb-sql.d.ts
 * Whole project is MIT licensed, so, we can use it. We also feed back any
 * improvements, questions, concerns.
 */
declare module "sql" {

	type SQLDialects =
		| "mssql"
		| "mysql"
		| "oracle"
		| "postgres"
		| "sqlite"
		;

	interface OrderByValueNode {}

	interface Named<Name extends string> {
		name?: Name;
	}
	interface ColumnDefinition<Name extends string, Type> extends Named<Name> {
		jsType?: Type;
		dataType: string;
		primaryKey?: boolean;
		references?: {
			table:string;
			column: string;
			onDelete?: 'restrict' | 'cascade' | 'no action' | 'set null' | 'set default';
			onUpdate?: 'restrict' | 'cascade' | 'no action' | 'set null' | 'set default';
		};
		notNull?: boolean;
		unique?: boolean;
		defaultValue?: Type;
	}

	interface TableDefinition<Name extends string, Row> {
		name: Name;
		schema: string;
		columns: {[CName in keyof Row]: ColumnDefinition<CName, Row[CName]>};
		dialect?: SQLDialects;
		isTemporary?: boolean;
		foreignKeys?: {
			table: string,
			columns: (keyof Row)[],
			refColumns: string[],
			onDelete?: 'restrict' | 'cascade' | 'no action' | 'set null' | 'set default';
			onUpdate?: 'restrict' | 'cascade' | 'no action' | 'set null' | 'set default';
		}
	}

	interface QueryLike {
		values: any[]
		text:string
	}

	interface Executable {
		toQuery():QueryLike;
	}

	interface Queryable<T> extends Executable {
		where(...nodes:any[]):Query<T>
		delete():ModifyingQuery
		select(star: Column<void, void>): Query<T>;
		select<N1 extends string, T1>(n1: Column<N1, T1>):Query<{[N in N1]: T1}>;
		select<N1 extends string, T1, N2 extends string, T2>(
				n1: Column<N1, T1>,
				n2: Column<N2, T2>):Query<{[N in N1]: T1} & {[N in N2]: T2}>
		select<N1 extends string, T1, N2 extends string, T2, N3 extends string, T3>(
				n1: Column<N1, T1>,
				n2: Column<N2, T2>,
				n3: Column<N3, T3>):Query<{[N in N1]: T1} & {[N in N2]: T2} & {[N in N3]: T3}>
		select<U>(...nodesOrTables:any[]):Query<U>

	}

	interface Query<T> extends Executable, Queryable<T> {
		resultType: T;

		from(table:TableNode):Query<T>
		from(statement:string):Query<T>
		update(o:{[key: string]:any}):ModifyingQuery
		update(o:{}):ModifyingQuery
		group(...nodes:any[]):Query<T>
		order(...criteria:OrderByValueNode[]):Query<T>
		limit(l:number):Query<T>
		offset(o:number):Query<T>
	}

	interface SubQuery<T> {
		select<Name>(node:Column<Name, T>):SubQuery<T>
		select(...nodes: any[]):SubQuery<T>
		where(...nodes:any[]):SubQuery<T>
		from(table:TableNode):SubQuery<T>
		from(statement:string):SubQuery<T>
		group(...nodes:any[]):SubQuery<T>
		order(criteria:OrderByValueNode):SubQuery<T>
		exists():BinaryNode
		notExists(): BinaryNode;
		notExists(subQuery:SubQuery<any>):BinaryNode
	}


	interface ModifyingQuery extends Executable {
		returning<U>(...nodes:any[]):Query<U>
		where(...nodes:any[]):ModifyingQuery
	}

	interface TableNode {
		join(table:TableNode):JoinTableNode
		leftJoin(table:TableNode):JoinTableNode
	}

	interface JoinTableNode extends TableNode {
		on(filter:BinaryNode):TableNode
		on(filter:string):TableNode
	}

	interface CreateQuery extends Executable {
		ifNotExists():Executable
	}
	interface DropQuery extends Executable {
		ifExists():Executable
	}

	type Columns<T> = {
		[Name in keyof T]: Column<Name, T[Name]>
	}
	type Table<Name extends string, T> = TableNode & Queryable<T> & Named<Name> & Columns<T> & {
		getName(): string;
		getSchema(): string;

		literal(statement: string): any;

		create():CreateQuery
		drop():DropQuery
		as<OtherName extends string>(name:OtherName):Table<OtherName, T>
		update(o: Partial<T>):ModifyingQuery
		insert(row:T):ModifyingQuery
		insert(rows:T[]):ModifyingQuery
		select():Query<T>
		select<U>(...nodes:any[]):Query<U>
		from<U>(table:TableNode):Query<U>
		from<U>(statement:string):Query<U>
		star({prefix: string}?):Column<void, void>
		subQuery<U>():SubQuery<U>
		columns:Column<void, void>[]
		sql: SQL;
		alter():AlterQuery<T>;
		indexes(): IndexQuery;
	}

	interface AlterQuery<T> extends Executable {
		addColumn(column:Column<any, any>): AlterQuery<T>;
		addColumn(name: string, options:string): AlterQuery<T>;
		dropColumn(column: Column<any, any>|string): AlterQuery<T>;
		renameColumn(column: Column<any, any>, newColumn: Column<any, any>):AlterQuery<T>;
		renameColumn(column: Column<any, any>, newName: string):AlterQuery<T>;
		renameColumn(name: string, newName: string):AlterQuery<T>;
		rename(newName: string): AlterQuery<T>
	}
	interface IndexQuery {
		create(): IndexCreationQuery;
		create(indexName: string): IndexCreationQuery;
		drop(indexName: string): Executable;
		drop(...columns: Column<any, any>[]): Executable
	}
	interface IndexCreationQuery extends Executable {
		unique(): IndexCreationQuery;
		using(name: string): IndexCreationQuery;
		on(...columns: (Column<any, any>|OrderByValueNode)[]): IndexCreationQuery;
		withParser(parserName: string): IndexCreationQuery;
		fulltext(): IndexCreationQuery;
		spatial(): IndexCreationQuery;
	}

	interface SQL {
		functions: {
				LOWER<Name>(c:Column<Name, string>):Column<Name, string>
		}
	}

	interface BinaryNode {
		and(node:BinaryNode):BinaryNode
		or(node:BinaryNode):BinaryNode
	}

	interface Column<Name, T> {
		name: Name
		in(arr:T[]):BinaryNode
		in(subQuery:SubQuery<T>):BinaryNode
		notIn(arr:T[]):BinaryNode
		equals(node: T|Column<any, T>):BinaryNode
		notEquals(node: T|Column<any, T>):BinaryNode
		gte(node: T|Column<any, T>):BinaryNode
		lte(node: T|Column<any, T>):BinaryNode
		gt(node:T|Column<any, T>):BinaryNode
		lt(node: T|Column<any, T>):BinaryNode
		like(str:string):BinaryNode
		multiply:{
				(node:Column<any, T>):Column<any, T>
				(n:number):Column<any, number> //todo check column names
		}
		isNull():BinaryNode
		isNotNull():BinaryNode
		//todo check column names
		sum():Column<any, number>
		count():Column<any, number>
		count(name:string):Column<any, number>
		distinct():Column<Name, T>
		as<OtherName>(name:OtherName):Column<OtherName, T>
		ascending:OrderByValueNode
		descending:OrderByValueNode
		asc:OrderByValueNode
		desc:OrderByValueNode
	}

	function define<Name extends string, T>(map:TableDefinition<Name, T>): Table<Name, T>;
	function setDialect(dialect: SQLDialects): void;

}