// 用RMS記錄個人信息
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.rms.*;
import java.util.Enumeration;
import java.util.*;

public class PersonalInfo extends MIDlet implements CommandListener {
	RecordStore recordStore =null;
	Display display = null;  // 設備的顯示器
	List list = null;	
	TextField nameField;  // 姓名文本域
	TextField phoneField;  //電話號碼文本域
	TextField emailField;  //電子郵件文本域
	
	String name, phone, email;
	private int[] recID;
	boolean isAdd;  // 值為true時為增加記錄，否則為修改記錄
	
	Ticker ticker = new Ticker("個人信息  ");  //實例化Ticker對象
	static final Command EXIT = new Command("退出",Command.STOP,1); //實例化命令
	static final Command BACK = new Command("返回",Command.BACK,2);
	static final Command VIEW = new Command("查看和修改記錄",Command.OK,3);
	static final Command ADD = new Command("添加新記錄",Command.OK,3);
	static final Command DEL = new Command("刪除當前記錄",Command.OK,3);
	static final Command DEL_ALL = new Command("刪除所有記錄",Command.OK,3);
	static final Command SAVE = new Command("保存",Command.OK,3);
	
	public PersonalInfo() {
	}

	// 重載抽象類MIDlet的抽象方法startApp()
	public void startApp() {
		display = Display.getDisplay(this); //獲取顯示器
		try {
			recordStore = RecordStore.openRecordStore("PersonalInfo", true); //實例化記錄存儲區
		} catch(Exception e) {
		}
        list = new List("個人信息",Choice.IMPLICIT); //實例化列表
		list.addCommand(EXIT); //增加控制命令
		list.addCommand(ADD);
		list.setCommandListener(this);
		list.setTicker(ticker);        
        list.setCommandListener(this);
		listRec();
	}
	
	// 重載抽象類MIDlet的方法pauseApp()
	public void pauseApp() {
	}
	
	// 重載抽象類MIDlet的方法destroyApp()
	public void destroyApp(boolean unconditional) {
		
	}

	public void listRec() {
        list.deleteAll(); //刪除列表元素
        try {
			int numRec = recordStore.getNumRecords(); //獲取記錄數
			if(numRec > 0) {
				list.addCommand(VIEW);
				list.addCommand(DEL);
				list.addCommand(DEL_ALL);
				recID = new int [numRec];
				RecordEnumeration re = recordStore.enumerateRecords(null,null,true); //記錄枚舉對象
				int i = 0;
				while(re.hasNextElement()) { //遍歷記錄
					recID[i] = re.nextRecordId();
					name = PersonalRecord.getName(recordStore.getRecord(recID[i]));  //獲取名稱
					list.append(name,null); //增加列表元素
					i++;
				}
			} else {
				list.removeCommand(VIEW);
				list.removeCommand(DEL);
				list.removeCommand(DEL_ALL);				
			}
        } catch (RecordStoreException rse) {
        }
		display.setCurrent(list);
	 }
	
	public void viewRecScreen() {  //顯示記錄信息
		Form view = new Form("個人信息"); //創建表單 
        nameField = new TextField("姓名:",name,20,TextField.ANY);  //創建文本域
        phoneField = new TextField("電話:",phone,20,TextField.NUMERIC);
        emailField = new TextField("E-Mail:",email,20,TextField.EMAILADDR);
        view.append(nameField);  //增加文本域到表單
        view.append(phoneField); 
        view.append(emailField);
        view.addCommand(BACK);
        view.addCommand(SAVE);
        view.setCommandListener(this);
        display.setCurrent(view); //設置當前顯示屏幕
	}
	
	public void viewRec() {
    	isAdd = false;
    	try {
    		byte[] b = recordStore.getRecord(recID[list.getSelectedIndex()]);
	    	name = PersonalRecord.getName(b); //獲取名稱
	        phone = PersonalRecord.getPhone(b); //獲取電話
	        email = PersonalRecord.getEmail(b); //獲取電子郵件
	    } catch(Exception e) {
	    } 
	    viewRecScreen(); //顯示信息
	}
	
	public void addRec() {  //增加記錄
    	isAdd = true;
    	name = null;
        phone = null;
        email = null;
	    viewRecScreen();
	}
	
	public void saveRec() { //存儲記錄
		name = nameField.getString();  //獲取用戶輸入 
		phone = phoneField.getString();
		email = emailField.getString();
       	if (!(name.trim().equals(""))) {       		
	       	byte[] b = PersonalRecord.createRecord(name,phone,email); //創建一條記錄
	    	try {
	    		if(isAdd) {
	    			recordStore.addRecord(b,0,b.length); //增加記錄
		    	} else {
	        		recordStore.setRecord(recID[list.getSelectedIndex()],b,0,b.length); //修改記錄
	        	}
		    } catch(Exception e) {
		    }
		 }
	}
	
	public void delRec(int i) { 
    	try{
	        recordStore.deleteRecord(i); //刪除記錄
    	} catch(Exception e) {
    	}		
	}
	
	public void delAllRec() {  //刪除所有記錄
        try {
            String dbName = recordStore.getName();
            recordStore.closeRecordStore();  //關閉記錄存儲區
            RecordStore.deleteRecordStore(dbName); //刪除記錄存儲區
        } catch (RecordStoreException rsnoe) {
        }
	}
	
	// 實現接口CommandListener的方法
	public void commandAction(Command c, Displayable d) {
        if (c == ADD) {
        	addRec();
        } else if (c == List.SELECT_COMMAND || c == VIEW) {
			viewRec();
        } else if(c == DEL) {
        	delRec(recID[list.getSelectedIndex()]);
        	listRec();
        } else if (c == DEL_ALL) {
	        delAllRec();
        	startApp();
		} else if (c == EXIT) {
        	destroyApp(false);
        	notifyDestroyed();
        } else if (c == BACK) {
            display.setCurrent(list);
        } else if (c == SAVE) { 
        	saveRec();
        	listRec();
        }  
	}	
}