dblang/src/alias.ts

import { Attribute, DB, Table } from "./db"
import { Handler } from "./defaultHandler";

export class AttributeAlias {
    name: string;
    nameO: string;
    table: TableAlias;
    attr: Attribute;
    constructor(attr: Attribute, table: TableAlias) {
        this.name = attr.name;
        this.nameO = attr.nameO;
        this.attr = attr;
        this.table = table;
    }
    serialize(handler: Handler) {
        return handler.builders.escapeID(this.name);
    }
    toString(handler: Handler = this.table.dbLangDatabaseInstance.getHandler()) {
        return this.table.serialize(handler) + "." + this.serialize(handler);
    }
    toStringFunc(handler: Handler) {
        return this.table.serialize(handler) + "(" + this.serialize(handler) + ")";
    }
}

export class TableAlias {
    dbLangTableName: string;
    dbLangTableAttributes: { [key: string]: AttributeAlias; } = {};
    dbLangDatabaseInstance: DB;
    dbLangTableInstance: Table;
    [key: string]: AttributeAlias | any;
    constructor(name: string, table: Table) {
        this.dbLangTableName = name;
        this.dbLangTableInstance = table;
        this.dbLangDatabaseInstance = table.dbLangDatabaseInstance;
        let keys = Object.keys(table.dbLangTableAttributes);
        for (let i = 0; i < keys.length; i++) {
            const a = table.dbLangTableAttributes[keys[i]];
            let attrAlias = new AttributeAlias(a, this);
            this[a.name] = attrAlias;
            this[a.nameO] = attrAlias;
            this.dbLangTableAttributes[a.name] = attrAlias;
        }
    }
    serialize(handler: Handler) {
        return this.toString(handler);
    }
    toString(handler: Handler = this.dbLangDatabaseInstance.getHandler()) {
        return handler.builders.escapeID(this.dbLangTableName);
    }
}