JournalEntry.java

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class JournalEntry {
    private final int id;
    private String title;
    private String content;
    private final LocalDateTime createdAt;

    public JournalEntry(int id, String title, String content, LocalDateTime createdAt) {
        this.id = id;
        this.title = title;
        this.content = content;
        this.createdAt = createdAt;
    }

    public int getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }

    public String getContent() {
        return content;
    }

    public LocalDateTime getCreatedAt() {
        return createdAt;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String serialize() {
        return id + "||" + escape(title) + "||" + escape(content) + "||" +
            createdAt.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
    }

    public static JournalEntry deserialize(String line) {
        String[] parts = line.split("\\|\\|", 4);
        if (parts.length != 4) return null;
        int id = Integer.parseInt(parts[0]);
        String title = unescape(parts[1]);
        String content = unescape(parts[2]);
        LocalDateTime createdAt = LocalDateTime.parse(parts[3], DateTimeFormatter.ISO_LOCAL_DATE_TIME);
        return new JournalEntry(id, title, content, createdAt);
    }

    private static String escape(String text) {
        return text.replace("\\", "\\\\").replace("||", "\\|\\|");
    }

    private static String unescape(String text) {
        return text.replace("\\|\\|", "||").replace("\\\\", "\\");
    }

    @Override
    public String toString() {
        return "[" + id + "] " + title + " (" + createdAt.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm")) + ")";
    }
}