FM/Assets/Scripts/Runtime/Printer/HanYin/HanYinPrinterManager.cs

using System;
using System.Collections.Generic;
using UnityEngine;

namespace Runtime.Printer
{
    public class HanYinPrinterManager : MonoBehaviour
    {
        public Texture2D logo;
        
        private static string GetTime()
        {
            string time = DateTime.Now.ToString("h:mm");
            if (DateTime.Now.Hour < 12)
                time += "am";
            else
                time += "pm";
            return time;
        }

        public void PrintTestPaper()
        {
            PrintLogo("192.168.0.126", "123fdsa1",
                "\"NOTEBOOK LG DOT HYDRANGEA BLUE HARD COVER,1,338,,Large Customization Front or Back,1,0,5577000008701,NOTEBOOK PK DOT MYRTLE GREEN HARD COVER,1,258,,Pocket Customization Front or Back,1,0,5577000008718\"",
                123, "abc1243", "test", "12345678");
        }

        void PrintText(AndroidJavaClass printClass, string s)
        {
            printClass.CallStatic<int>("PrintText", s, 0, 0, 0);
        }

        void PrintLine(AndroidJavaClass printClass)
        {
            printClass.CallStatic<int>("PrintText", "                                        ", 0, 4, 0);
        }

        void PrintNewLine(AndroidJavaClass printClass)
        {
            printClass.CallStatic<int>("PrintAndLineFeed");
        }

        /// <summary>
        /// 打印
        /// </summary>
        /// <param name="printer_ip">打印机IP地址</param>
        /// <param name="backend_order_id">这个应该就是orderID</param>
        /// <param name="json">打印的主体内容</param>
        /// <param name="totalPrice">价钱</param>
        /// <param name="order_id">orderID</param>
        /// <param name="customer_name">顾客姓名：指购买商品或服务的人的名字。</param>
        /// <param name="customer_phone">顾客电话</param>
        public void PrintLogo(string printer_ip, string backend_order_id, string json, decimal totalPrice,
            string order_id, string customer_name, string customer_phone)
        {
            if (Application.platform == RuntimePlatform.Android)
            {
                try
                {
                    // Get Android Context
                    using (AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
                    using (AndroidJavaObject currentActivity =
                           unityPlayer.GetStatic<AndroidJavaObject>("currentActivity"))
                    {
                        // Call Print.PortOpen(Context, String)
                        using (AndroidJavaClass printClass = new AndroidJavaClass("print.Print"))
                        {
                            string port = $"WiFi,{printer_ip},9100"; // Change to your printer's connection type
                            int result = printClass.CallStatic<int>("PortOpen", currentActivity, port);
                            Debug.Log($"connect result: {result}");
                        }
                    }


                    using (AndroidJavaClass printClass = new AndroidJavaClass("print.Print"))
                    {
                        printClass.CallStatic<int>("PrintText", " \n", 1, 1, 0);


                        using (AndroidJavaClass wrapperClass = new AndroidJavaClass("PrinterWrapper"))
                        {
                            // Call PrintImage(String path, byte var1, byte var2, int var3)
                            byte[] array = logo.EncodeToPNG();
                            int result = wrapperClass.CallStatic<int>("PrintImageFromString", array, 0, 0);

                            Debug.Log(result != -1 ? "Print logo success" : "Print logo failed");
                        }

                        PrintNewLine(printClass);
                        PrintNewLine(printClass);
                        PrintText(printClass, "Code no. " + backend_order_id);
                        PrintText(printClass,
                            "Date: " + DateTime.Now.ToString("yyyy/MM/dd") + "          " + "Time: " + GetTime());
                        PrintLine(printClass);
                        PrintNewLine(printClass);

                        json = json.Trim('\"');
                        string[] words = json.Split(',');
                        List<string> productNames = new List<string>();
                        List<string> productQuantity = new List<string>();
                        List<string> productPrice = new List<string>();
                        List<string> productBarcode = new List<string>();
                        for (int i = 0; i < words.Length; i++)
                        {
                            if (i % 4 == 0)
                            {
                                productNames.Add(words[i]);
                            }
                            else if (i % 4 == 1)
                            {
                                productQuantity.Add(words[i]);
                            }
                            else if (i % 4 == 2)
                            {
                                productPrice.Add(words[i]);
                            }
                            else if (i % 4 == 3)
                            {
                                productBarcode.Add(words[i]);
                            }
                        }

                        int frontLimit = 30;
                        for (int i = 0; i < productNames.Count; i++)
                        {
                            string productName = productNames[i];
                            int productLength = productName.Length;
                            int head = 0; // Tracks current position in productName

                            while (productLength > 0)
                            {
                                int printLength = Math.Min(frontLimit, productLength);
                                string partToPrint;

                                // Check if we are in the middle of a word
                                if (head + printLength < productName.Length &&
                                    !char.IsWhiteSpace(productName[head + printLength]))
                                {
                                    int lastSpace = productName.LastIndexOf(' ', head + printLength, printLength);
                                    if (lastSpace > head)
                                    {
                                        printLength = lastSpace - head; // Adjust to break at the last space
                                    }
                                }

                                partToPrint = productName.Substring(head, printLength).Trim();

                                // If it's the first line, append quantity and price
                                if (head == 0)
                                {
                                    partToPrint = partToPrint.PadRight(frontLimit, ' ') +
                                                  ("x" + productQuantity[i]).PadLeft(3, ' ') +
                                                  ("SGD" + productPrice[i]).PadLeft(10, ' ');
                                }
                                else
                                {
                                    partToPrint = partToPrint.PadRight(frontLimit, ' '); // Pad remaining space
                                }

                                PrintText(printClass, partToPrint);

                                // Move to the next part
                                head += printLength + 1; // Skip the space
                                productLength -= printLength + 1;
                            }

                            printClass.CallStatic<int>("PrintBarCode", 69, productBarcode[i], 2, 60, 0, 1);
                            PrintNewLine(printClass);
                        }

                        PrintLine(printClass);
                        PrintNewLine(printClass);

                        PrintText(printClass,
                            "Total:".PadRight(frontLimit, ' ') + ("SGD" + totalPrice).PadLeft(13, ' '));

                        PrintNewLine(printClass);

                        printClass.CallStatic<int>("PrintText",
                            "\nThank you! Please show this\nticket to the staff at the counter.\n\n", 1, 0, 0);

                        printClass.CallStatic<int>("PrintText", order_id, 1, 0, 32);
                        PrintNewLine(printClass);
                        PrintNewLine(printClass);

                        printClass.CallStatic<int>("PrintText", customer_name + "  " + customer_phone + "\n\n", 1, 0,
                            0);

                        PrintNewLine(printClass);
                        PrintNewLine(printClass);
                        PrintNewLine(printClass);
                        PrintNewLine(printClass);

                        printClass.CallStatic<int>("CutPaper", 1);
                        printClass.CallStatic<bool>("PortClose");
                    }
                }
                catch (Exception e)
                {
                    Debug.LogError("Error calling PrintImage: " + e.Message);
                }
            }
        }
    }
}