ERPNext Random Data Generator

package main

import (
	"encoding/csv"
	"fmt"
	"math/rand"
	"net/http"
	"os"
	"strings"
)

func readCsv(filename string) ([][]string, error) {

	f, err := os.Open(filename)
	if err != nil {
		return [][]string{}, err
	}
	defer f.Close()

	lines, err := csv.NewReader(f).ReadAll()
	if err != nil {
		return [][]string{}, err
	}

	return lines, nil
}

func createCustomer(response chan<- bool, name string) {
	url := "http://erp.integrated.ee/api/resource/Customer"

	payload := strings.NewReader(fmt.Sprintf(`{"customer_name":"%s"}`, name))

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("authorization", "Basic xxx==")
	req.Header.Add("accept", "application/json")
	req.Header.Add("content-type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()

	response <- true
}

func createSalesOrder(response chan<- bool, customerName string, service string) {

	url := "http://erp.integrated.ee/api/resource/Sales%20Order"

	randomMonth := rand.Intn(12-1) + 1
	randomDate := rand.Intn(28-1) + 1
	randomPrice := rand.Intn(12003121-2121212) + 1

	payload := strings.NewReader(fmt.Sprintf(
		`{"owner":"Administrator",
	"creation":"2020-01-02",
	"title":"%s",
	"customer":"%s",
	"order_type":"Sales",
	"delivery_date":"2020-%v-%v",
	"customer_group":"All Customer Groups",
	"conversion_rate": 1,
	"selling_price_list":"Standard Selling",
	"price_list_currency":"EUR",
	"items": [{ "item_code":"100", 
	"item_name":"%s", 
	"ensure_delivery_based_on_produced_serial_no": 0, 
	"delivery_date":"2020-02-01", 
	"qty": 1, "uom":"Nos", 
	"conversion_factor": 1, 
	"rate": %v}] }`, service, customerName, randomMonth, randomDate, service, randomPrice))

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("authorization", "Basic xx==")
	req.Header.Add("accept", "application/json")
	req.Header.Add("content-type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()

	response <- true

}

func main() {

	lines, err := readCsv("MOCK_DATA.csv")
	if err != nil {
		panic(err)
	}

	for _, line := range lines {

		nameCreated := make(chan bool)
		orderCreated := make(chan bool)
		var fullName = line[1]
		var serviceName = line[2]

		go createCustomer(nameCreated, fullName)

		<-nameCreated

		go createSalesOrder(orderCreated, fullName, serviceName)

		fmt.Println(<-orderCreated)
	}
}