vendaweb-api/src/shared/services/shared.service.ts

/*
https://docs.nestjs.com/providers#services
*/

import { Injectable } from '@nestjs/common';
import { connectionOptions } from 'src/configs/typeorm.config';
import { Pcclient } from 'src/domain/entity/tables/pcclient.entity';
import { Store } from 'src/domain/entity/tables/pcfilial.entity';
import { Pctabtrib } from 'src/domain/entity/tables/pctabtrib.entity';
import { Connection } from 'typeorm';
//import { DataSource } from 'typeorm';
import { EntityManager } from 'typeorm';


@Injectable()
export class SharedService { 

    async generateIdCustomer() {
        console.log("Gerando idcustomer");
        const connection = new Connection(connectionOptions);
        await connection.connect();
        const queryRunner = connection.createQueryRunner();
        await queryRunner.connect();

        // lets now open a new transaction:
        await queryRunner.startTransaction();

        try {

            let sql = 'SELECT PROXNUMCLI as "proxnumcli" FROM PCCONSUM WHERE 1 = 1 FOR UPDATE';
            const param = await queryRunner.query(sql);
            // const param = await queryRunner.manager
            //     .getRepository(Pcconsum)
            //     .createQueryBuilder('pcconsum')
            //     .setLock("dirty_read")
            //     .getOne();

            const idCustomer = param[0].proxnumcli;
            console.log(idCustomer);

            sql = "UPDATE PCCONSUM SET  PROXNUMCLI = NVL(PROXNUMCLI,0) + 1 WHERE 1 = 1"
            await queryRunner.query(sql, []);    
            // commit transaction now:
            await queryRunner.commitTransaction();
            return idCustomer;

        } catch (err) {
            // since we have errors let's rollback changes we made
            await queryRunner.rollbackTransaction();
            return -1;

        } finally {
            // you need to release query runner which is manually created:
            await queryRunner.release();
            await connection.close();
        }
    }

    async generateIdPreOrder(idSeller: number) {
        const connection = new Connection(connectionOptions);
        await connection.connect();
        const queryRunner = connection.createQueryRunner();
        await queryRunner.connect();

        // lets now open a new transaction:
        await queryRunner.startTransaction();

        try {

            let sql = `SELECT PROXNUMPED as "proxnumped" FROM PCUSUARI WHERE CODUSUR = :1 FOR UPDATE`;
            const seller = await queryRunner.query(sql, [idSeller] );

            // const seller = await queryRunner.manager
            //     .getRepository(Pcusuari)
            //     .createQueryBuilder('pcusuari')
            //     .where('pcusuari.codusur = :idSeller', {idSeller: idSeller})
            //     .setLock("dirty_read")
            //     .getOne();

            const idPreOrder = seller[0].proxnumped;
            // await getConnection()
            //     .createQueryBuilder()
            //     .update(Pcusuari)
            //     .set({ proxnumped: idPreOrder + 1 })
            //     .where('pcusuari.codusur = :idSeller', {idSeller: idSeller})
            //     .execute();
            // commit transaction now:
            sql = `UPDATE PCUSUARI SET PROXNUMPED = NVL(PROXNUMPED,0) + 1 WHERE CODUSUR = :1`;
            await queryRunner.query(sql, [idSeller] );
            await queryRunner.commitTransaction();
            return idPreOrder;
        } catch (err) {
            // since we have errors let's rollback changes we made
            await queryRunner.rollbackTransaction();
            console.log(err);
            throw err;
        } finally {
            // you need to release query runner which is manually created:
            await queryRunner.release();
            await connection.close();
        }
    }

    async getCustomer(idCustomer: number) {
        const connection = new Connection(connectionOptions);
        await connection.connect();
        const queryRunner = connection.createQueryRunner();
        await queryRunner.connect();
        try {
            const customer = await queryRunner.manager
                .getRepository(Pcclient)
                .createQueryBuilder('pcclient')
                .where("\"pcclient\".codcli = :idCustomer", { idCustomer })
                .getOne();
            return customer;
        } catch (error) {
            throw error;
        } finally {
            await queryRunner.release();
            await connection.close();
        }
    }

    async getTaxId(productId: number, stockId: string, state: string) {
        const connection = new Connection(connectionOptions);
        await connection.connect();
        const queryRunner = connection.createQueryRunner();
        await queryRunner.connect();
        try {
            const tax = await queryRunner.manager
                .getRepository(Pctabtrib)
                .createQueryBuilder('pctabtrib')
                .where("pctabtrib.codprod = :codprod and pctabtrib.codfilialnf = :codfilialnf and ufdestino = :ufdestino",
                         { codprod: productId, codfilialnf: stockId, ufdestino: state })
                .getOne();
            return tax != null ? tax.codst : 0;
        } catch (error) {
            throw error;
        } finally {
            await queryRunner.release();
            await connection.close();
        }
    }

    async getStores(storeId: string) {
        const connection = new Connection(connectionOptions);
        await connection.connect();
        const queryRunner = connection.createQueryRunner();
        await queryRunner.connect();
        try {
            let where = "1=1";
            if (storeId != null){
                where = `ID = ${storeId}`;
            }
            const stores = await queryRunner.manager
                .getRepository(Store)
                .createQueryBuilder('pcfilial')
                .select(['storeId', 'name', 'shortName'])
                .where(where)
                .getMany();
            return stores;
        } catch (error) {
            throw error;
        } finally {
            await queryRunner.release();
            await connection.close();
        }
    }

}