Biskilog/BISKILOG POS BASIC/Customer/Customers.cs

using BiskLog_Point_Of_Sale.Cashier_Module;
using BiskLog_Point_Of_Sale.Classes;
using BiskLog_Point_Of_Sale.Company_Setup;
using BiskLog_Point_Of_Sale.Customer;
using BiskLog_Point_Of_Sale.Delivery;
using BiskLog_Point_Of_Sale.POSDialogs;
using BiskLog_Point_Of_Sale.Properties;
using Point_Of_Sale_Managment;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace BiskLog_Point_Of_Sale
{
    public partial class Customers : Form
    {
        SqlConnection cn;
        SqlCommand cm;
        SqlDataReader dr;
        SqlTransaction tn;
        DatabaseConn conn = new DatabaseConn();
        string firstnameC, surnameC, selectedID, currency;
        Form1 form;
        CashierMain cashier;
        decimal figure = 0;

        public Customers(Form1 form = null, CashierMain cashier = null)
        {
            InitializeComponent();
            cn = new SqlConnection(conn.MyConnection());
            holding.Left = (ClientSize.Width - holding.Width) / 2;
            panelHo.Left = (panel14.Width - panelHo.Width) / 2;
            panelHo.Top = (panel14.Height - panelHo.Height) / 2;
            currency = Settings.Default.currrencyCode + " ";
            if (form != null)
            {
                this.form = form;
            }
            else
            {
                this.cashier = cashier;
            }
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            AddCustomer addCustomer = new AddCustomer(this);
            addCustomer.BringToFront();
            addCustomer.ShowDialog();
        }

        private void BtnEdit_Click(object sender, EventArgs e)
        {
            List<string> details = new List<string>();
            details.Add(lblCustomerID.Text);
            details.Add(firstnameC);
            details.Add(surnameC);
            details.Add(customerAddress.Text);
            details.Add(customerEmail.Text);
            details.Add(customerPhone.Text);
            details.Add(lbltaxID.Text);
            AddCustomer addCustomer = new AddCustomer(this, true, details);
            addCustomer.BringToFront();
            addCustomer.ShowDialog();
        }
        public async void loadCustomerOutNOut()
        {
            Task<int> task = new Task<int>(loadCustomers);
            holding.Visible = true;
            task.Start();
            await task;
            holding.Visible = false;
        }
        public int loadCustomers()
        {
            try
            {
                int i = 1;
                dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Clear()));
                cn.Open();
                cm = new SqlCommand("Select firstname,surname,address,telephone,tin,customerID,email from tblCustomers where status = @status and branchID = @branchID" +
                    " and (Firstname like '%" + searchBox.Text + "%' or Surname like '%" + searchBox.Text + "%' or customerID like '%" + searchBox.Text + "%')", cn);
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@status", "ACTIVE");
                cm.ExecuteNonQuery();
                dr = cm.ExecuteReader();
                while (dr.Read())
                {
                    dataGridView1.Invoke(new Action(() => dataGridView1.Rows.Add(i, dr[0].ToString().ToUpper() + " " + dr[1].ToString().ToUpper(),
                        dr[2].ToString().ToUpper(), dr[3].ToString(), dr[4].ToString(), dr[5].ToString(), dr[6].ToString(), dr[0].ToString().ToUpper(),
                        dr[1].ToString().ToUpper())));
                    i++;
                }
                dr.Close();
                cn.Close();
                dataGridView1.Invoke(new Action(() => dataGridView1.ClearSelection()));
                return 1;
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        public int loadBal()
        {
            try
            {
                balText.Invoke(new Action(() =>
                {
                    cn.Open();
                    cm = new SqlCommand("Select top(1) balance from CustomerAccounts where branchID = @branchID and customerID = @customer " +
                        "order by date desc", cn);
                    cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                    cm.Parameters.AddWithValue("@customer", selectedID);
                    cm.ExecuteNonQuery();
                    dr = cm.ExecuteReader();
                    dr.Read();
                    if (dr.HasRows)
                    {
                        figure = decimal.Parse(dr[0].ToString());
                        balText.Text = "Account Balance : " + currency + figure;
                        if (figure < 0)
                        {
                            balText.ForeColor = Color.Crimson;
                        }
                        else
                        {
                            balText.ForeColor = Color.DarkGreen;
                        }
                    }
                    else
                    {
                        balText.Text = "Account Balance : " + currency + "00.00";
                        balText.ForeColor = Color.DarkGreen;
                        figure = 0;
                    }
                    dr.Close();
                    cn.Close();
                }));
                return 1;
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
                return 0;
            }
        }

        private async void Customers_Load(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(loadCustomers);
            holding.Visible = true;
            task.Start();
            await task;
            holding.Visible = false;
        }

        private async void SearchBox_TextChanged(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(loadCustomers);
            holding.Visible = true;
            task.Start();
            await task;
            holding.Visible = false;
        }

        private void Sell_Click(object sender, EventArgs e)
        {
            CustomerClass customer = new CustomerClass();
            customer.firstname = lblName.Text;
            customer.id = lblCustomerID.Text;
            customer.address = customerAddress.Text;
            customer.email = customerEmail.Text;
            customer.telephone = customerPhone.Text;
            if (form != null)
            {
                form.MoveTOPOS(customer);
            }
            else
            {
                cashier.POS(customer: customer);

            }
        }

        private async void magicButton1_Click(object sender, EventArgs e)
        {
            AccountPayment accountPayment = new AccountPayment(figure);
            accountPayment.BringToFront();
            accountPayment.ShowDialog();
            if (accountPayment.DialogResult == DialogResult.OK && accountPayment.deposit)
            {
                decimal deposit = accountPayment.payment;
                decimal balance = figure;
                Task<int> task = new Task<int>(() => beginDeposit(deposit, balance));
                task.Start();
                int result = await task;
                if (result == 1)
                {
                    Task<int> task1 = new Task<int>(loadBal);
                    task1.Start();
                    await task1;
                }
            }else if(accountPayment.DialogResult == DialogResult.OK && accountPayment.withdrawal)
            {
                decimal withdraw = accountPayment.payment;
                Task<int> task = new Task<int>(() => beginWithdrawal(withdraw));
                task.Start();
                int result = await task;
                if (result == 1)
                {
                    Task<int> task1 = new Task<int>(loadBal);
                    task1.Start();
                    await task1;
                }
            }
        }
        private void customerHistory_Click(object sender, EventArgs e)
        {
            CustomerHistory customer = new CustomerHistory(lblCustomerID.Text);
            customer.BringToFront();
            customer.ShowDialog();
        }
        private void schDelivery_Click(object sender, EventArgs e)
        {
            CustomerClass person = new CustomerClass();
            person.firstname = firstnameC.ToUpper();
            person.surname = surnameC.ToUpper();
            person.address = customerAddress.Text;
            person.id = lblCustomerID.Text;
            person.email = customerEmail.Text;
            person.telephone = customerPhone.Text;
            NewDelivery delivery = new NewDelivery(person);
            delivery.BringToFront();
            delivery.ShowDialog();
        }
        public int beginDeposit(decimal depositAmt, decimal currentBal)
        {
            try
            {
                cn.Open();
                SortedList<string, decimal> receiptList = new SortedList<string, decimal>();
                SqlDataReader dr;
                SqlCommand cm;
                cm = new SqlCommand("Select receiptID,(totalBill - paid) as remaining from CreditPurchases where status = @status and " +
                    "customerID = @customerID and branchID = @branchID", cn);
                cm.Parameters.AddWithValue("@customerID", selectedID);
                cm.Parameters.AddWithValue("@status", "unsettled");
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.ExecuteNonQuery();
                dr = cm.ExecuteReader();
                while (dr.Read())
                {
                    string receiptID = dr[0].ToString();
                    decimal remaining1 = decimal.Parse(dr[1].ToString());
                    receiptList.Add(receiptID, remaining1);
                }
                dr.Close();

                tn = cn.BeginTransaction();

                cm = new SqlCommand("Declare @total decimal(19,2) = Case when (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID " +
                        "and customerID = @customerID) is null then 0 else (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID and customerID = @customerID) end " +
                        "set @total = (@total + @debit) - @credit " +
                        "Insert into CustomerAccounts(customerID, transactionID, date, debit, credit, balance, comments, branchID, countID) " +
                        "Values(@customerID, @transactionID, @date, @debit, @credit, @total, @comments, @branchID, @countID)", cn, tn);
                cm.Parameters.AddWithValue("@customerID", selectedID);
                cm.Parameters.AddWithValue("@transactionID", DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.Parameters.AddWithValue("@date", DateTime.Now);
                cm.Parameters.AddWithValue("@debit", depositAmt);
                cm.Parameters.AddWithValue("@credit", 0);
                cm.Parameters.AddWithValue("@comments", "Payment to account");
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@countID", MainLogin.login_user + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.ExecuteNonQuery();

                if (depositAmt + currentBal > 0)
                    PreviousSettlement.settlement(cn, selectedID, depositAmt + currentBal, receiptList, tn);

                tn.Commit();
                cn.Close();
                return 1;
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
                return 0;
            }
        }
        public int beginWithdrawal(decimal WithdrawAmt)
        {
            try
            {
                cn.Open();
                SortedList<string, decimal> receiptList = new SortedList<string, decimal>();
                SqlDataReader dr;
                SqlCommand cm;
                tn = cn.BeginTransaction();
                cm = new SqlCommand("Declare @total decimal(19,2) = Case when (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID " +
                        "and customerID = @customerID) is null then 0 else (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID and customerID = @customerID) end " +
                        "set @total = (@total + @debit) - @credit " +
                        "Insert into CustomerAccounts(customerID, transactionID, date, debit, credit, balance, comments, branchID, countID) " +
                        "Values(@customerID, @transactionID, @date, @debit, @credit, @total, @comments, @branchID, @countID)", cn, tn);
                cm.Parameters.AddWithValue("@customerID", selectedID);
                cm.Parameters.AddWithValue("@transactionID", DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.Parameters.AddWithValue("@date", DateTime.Now);
                cm.Parameters.AddWithValue("@debit", 0);
                cm.Parameters.AddWithValue("@credit", WithdrawAmt);
                cm.Parameters.AddWithValue("@comments", "Payment to customer");
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@countID", MainLogin.login_user + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.ExecuteNonQuery();
                tn.Commit();
                cn.Close();
                return 1;
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
                return 0;
            }
        }
        private async void DataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex != -1)
            {
                lblName.Text = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
                customerAddress.Text = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();
                customerPhone.Text = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
                lblCustomerID.Text = dataGridView1.Rows[e.RowIndex].Cells[5].Value.ToString();
                lbltaxID.Text = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();
                customerEmail.Text = dataGridView1.Rows[e.RowIndex].Cells[6].Value.ToString();
                firstnameC = dataGridView1.Rows[e.RowIndex].Cells[7].Value.ToString();
                surnameC = dataGridView1.Rows[e.RowIndex].Cells[8].Value.ToString();
                selectedID = lblCustomerID.Text;
                sell.Visible = true;
                btnEdit.Visible = true;
                customerHistory.Visible = true;
                paymentBTN.Visible = true;
                if (form != null)
                {
                  //  schDelivery.Visible = true;
                }
                Task<int> task = new Task<int>(loadBal);
                task.Start();
                await task;
            }
        }
    }
}