dblang/src/query.ts

import { Attribute, DB } from "./db";
import { BooleanModifier, Modifier } from "./dbStructure";
import { Handler } from "./defaultHandler";
import { primaryData, selectElements, selectFromElements, serializeReturn } from "./types";


export class Query {
    sql: string;
    values: primaryData[];
    constructor(sql: string, values: primaryData[]) {
        this.sql = sql;
        this.values = values;
    }
}

export class selectQuery {
    attr: selectElements[] = [];
    from: selectFromElements;
    constructor(a: selectElements[], from: selectFromElements) {
        this.attr.push(...a.flat(Infinity));
        this.from = from ? from : null;
    }
    whereD: BooleanModifier | null = null;
    where(m: BooleanModifier) {
        this.whereD = m;
        return this;
    }
    groupByD: Attribute[] = [];
    groupBy(a: Attribute[]) {
        this.groupByD = a;
        return this;
    }
    havingD: Modifier | null = null;
    having(m: Modifier) {
        this.havingD = m;
        return this;
    }
    limitD: number | null = null;
    limit(i: number) {
        this.limitD = i;
        return this;
    }

    serialize(handler = Handler): serializeReturn {
        return handler.querys.select(this);
    }

    query(db: DB) {
        const s = this.serialize(db.getHandler());
        return new Query(s[0], s[1]);
    }
}