Добавлен NotePadManager

src/tse/lr4/NotePad.java

@@ -1,5 +1,6 @@
 package tse.lr4;
 
+import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
@@ -54,6 +55,18 @@ public class NotePad {
         this.important = important;
     }
     
+    public static NotePad readFromCsvLine(String line) throws ParseException {
+        if (line.isEmpty()) throw new RuntimeException("Пустая строка");
+        String[] params = line.split(",");
+        if (params.length != 4) throw new RuntimeException("Неверное количество параметров");
+
+        String name = params[0];
+        String description = params[1];
+        Date data = new SimpleDateFormat(DATE_PATTERN).parse(params[2]);
+        boolean important = Boolean.parseBoolean(params[3]);
+        
+        return new NotePad(name, description, data, important);
+    }
     
     public String storeToCsvLine() {
         final char SEPARATOR = ',';

src/tse/lr4/NotePadManager.java

@@ -0,0 +1,107 @@
+package tse.lr4;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * Менеджер записей ежедневника.
+ * @author aNNiMON
+ */
+public class NotePadManager {
+    
+    private static final String FILENAME = "dailypad.csv";
+
+    private static NotePadManager instance;
+
+    public static NotePadManager getInstance() {
+        if (instance == null) {
+            instance = new NotePadManager();
+        }
+        return instance;
+    }
+
+    private ArrayList<NotePad> notepads;
+    
+    public NotePadManager() {
+        notepads = (ArrayList<NotePad>) readFromCSV(FILENAME);
+        if (notepads == null) notepads = new ArrayList<>();
+    }
+    
+    public ArrayList<NotePad> getNotepads() {
+        return notepads;
+    }
+    
+    public boolean isNotePadExists(String name) {
+        for (NotePad pad : notepads) {
+            if (name.equals(pad.getName())) return true;
+        }
+        return false;
+    }
+    
+    public void createNewEntry(String name, String desc, Date date, boolean important) {
+        notepads.add(new NotePad(name, desc, date, important));
+        saveToCSV(FILENAME, notepads);
+    }
+    
+    public void updateEntry(String name, String desc, Date date, boolean important) {
+        for (NotePad pad : notepads) {
+            if (name.equals(pad.getName())) {
+                pad.setDescription(desc);
+                pad.setDate(date);
+                pad.setImportant(important);
+            }
+        }
+        saveToCSV(FILENAME, notepads);
+    }
+    
+    private void saveToCSV(String filename, ArrayList<NotePad> list) {
+        try {
+            BufferedWriter writer = new BufferedWriter(
+                    new OutputStreamWriter(new FileOutputStream(filename), "UTF-8")
+            );
+            writer.write("Имя,Описание,Дата,Важное");
+            for (NotePad pad : list) {
+                writer.newLine();
+                writer.write(pad.storeToCsvLine());
+            }
+            writer.flush();
+            writer.close();
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+    }
+    
+    private Object readFromCSV(String filename) {
+        try {
+            List<NotePad> list = new ArrayList<>();
+            BufferedReader reader = new BufferedReader(
+                new InputStreamReader( new FileInputStream(filename), "UTF-8" )
+            );
+            reader.readLine(); // Имя,Описание,Дата,Важное
+            String line;
+            while ( (line = reader.readLine()) != null ) {
+                NotePad pad = null;
+                try {
+                    pad = NotePad.readFromCsvLine(line);
+                } catch (RuntimeException | ParseException ex) {
+                    System.out.println(ex.toString());
+                }
+                if (pad != null) list.add(pad);
+            }
+            reader.close();
+            return list;
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
+}