First Commit

3 files changed, 362 insertions, 0 deletions

diff --git a/src/Store/Book.java b/src/Store/Book.java
new file mode 100644
index 0000000..4232d77
--- /dev/null
+++ b/src/Store/Book.java
@@ -0,0 +1,214 @@
+package Store;
+
+import Server.JSONMessage;
+import Server.SocketServer;
+import UI.MainWindow;
+import com.corundumstudio.socketio.listener.DataListener;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.Map;
+
+public class Book {
+    private int id;
+    private String title;
+    private String author;
+    private int issuedBy;
+    private String issuedByName = "";
+
+    public Book(int id) {
+        this.id = id;
+    }
+
+    public Book(String title, String author) {
+        this.title = title;
+        this.author = author;
+        this.issuedBy = 0; // 0 means available since IDs start with 1
+    }
+
+    public Book(int id, String title, String author, int issuedBy, String issuedByName) {
+        this.id = id;
+        this.title = title;
+        this.author = author;
+        this.issuedBy = issuedBy;
+        this.issuedByName = issuedByName;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+
+    public String getAuthor() {
+        return this.author;
+    }
+
+    public int getIssuedBy() {
+        return this.issuedBy;
+    }
+
+    public int getId() {
+        return this.id;
+    }
+
+    public String getIssuedByName() {
+        return issuedByName;
+    }
+
+    public int bookIssuedBy() throws SQLException {
+        String sql = "SELECT issuedBy from Book where ID = " + this.id;
+        Statement statement = ConnectionHandler.connection.createStatement();
+
+        ResultSet response = statement.executeQuery(sql);
+        while (response.next()) {
+            return response.getInt("issuedBy");
+        }
+
+        return 0;
+    }
+
+    public boolean issue(int userId) throws SQLException {
+        if (bookIssuedBy() == 0) {
+            String sql = "UPDATE Book SET issuedBy = ? where ID = ?";
+            PreparedStatement statement = ConnectionHandler.connection.prepareStatement(sql);
+
+            statement.setInt(1, userId);
+            statement.setInt(2, this.id);
+
+            statement.executeUpdate();
+
+            ArrayList<Book> allBooks = Book.getAll(false);
+            UI.Components.BooksList.refreshBooks(allBooks);
+            if (MainWindow.serverStarted) {
+                SocketServer.server.getBroadcastOperations().sendEvent("booksUpdated", allBooks);
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    public boolean returnBook(int userId) throws SQLException {
+        if (bookIssuedBy() == userId) {
+            String sql = "UPDATE Book SET issuedBy = 0 where ID = ?";
+            PreparedStatement statement = ConnectionHandler.connection.prepareStatement(sql);
+
+            statement.setInt(1, this.id);
+
+            statement.executeUpdate();
+
+            ArrayList<Book> allBooks = Book.getAll(false);
+            UI.Components.BooksList.refreshBooks(allBooks);
+            if (MainWindow.serverStarted) {
+                SocketServer.server.getBroadcastOperations().sendEvent("booksUpdated", allBooks);
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    public void save() throws SQLException {
+        String sql = "INSERT INTO Book (title, author, issuedBy) VALUES (?, ?, ?)";
+
+        PreparedStatement statement = ConnectionHandler.connection.prepareStatement(sql);
+
+        statement.setString(1, title);
+        statement.setString(2, author);
+        statement.setInt(3, issuedBy);
+
+        statement.executeUpdate();
+
+        ArrayList<Book> allBooks = Book.getAll(false);
+        UI.Components.BooksList.refreshBooks(allBooks);
+        if (MainWindow.serverStarted) {
+            SocketServer.server.getBroadcastOperations().sendEvent("booksUpdated", allBooks);
+        }
+    }
+
+    public void delete() throws SQLException {
+        String sql = "DELETE FROM Book WHERE ID = ?";
+        PreparedStatement statement = ConnectionHandler.connection.prepareStatement(sql);
+
+        statement.setInt(1, this.id);
+
+        statement.executeUpdate();
+
+        ArrayList<Book> allBooks = Book.getAll(false);
+        UI.Components.BooksList.refreshBooks(allBooks);
+        if (MainWindow.serverStarted) {
+            SocketServer.server.getBroadcastOperations().sendEvent("booksUpdated", allBooks);
+        }
+    }
+
+    public static ArrayList<Book> getAll(boolean availableOnly) throws SQLException {
+        ArrayList<Book> books = new ArrayList<>();
+
+        String sql;
+        if (availableOnly) {
+            sql = "SELECT * FROM Book WHERE issuedBy = 0";
+        } else {
+            sql = "SELECT Book.ID, Book.title, Book.issuedBy, Book.author, " +
+                    "User.userName FROM Book LEFT JOIN User ON User.ID = Book.issuedBy";
+        }
+        Statement statement = ConnectionHandler.connection.createStatement();
+
+        ResultSet response = statement.executeQuery(sql);
+        while (response.next()) {
+            books.add(new Book(response.getInt("ID"), response.getString("title"), response.getString("author"), response.getInt("issuedBy"), response.getString("userName")));
+        }
+
+        return books;
+    }
+
+    public static DataListener<JSONMessage> getListHandler(boolean availableOnly) {
+        return ((client, data, ackSender) -> {
+            ArrayList<Book> books = getAll(availableOnly);
+            client.sendEvent(availableOnly ? "availableBooksList" : "allBooksList", books);
+        });
+    }
+
+    public static DataListener<JSONMessage> issueHandler() {
+        return ((client, data, ackSender) -> {
+            Map d = data.getData();
+
+            int userId = (int) d.get("id");
+            Book b = new Book((int) d.get("bookId"));
+
+            if (b.issue(userId)) {
+                client.sendEvent("issued");
+            } else {
+                client.sendEvent("alreadyIssued");
+            }
+        });
+    }
+
+    public static DataListener<JSONMessage> returnHandler() {
+        return ((client, data, ackSender) -> {
+            Map d = data.getData();
+
+            int userId = (int) d.get("id");
+            Book b = new Book((int) d.get("bookId"));
+
+            if (b.returnBook(userId)) {
+                client.sendEvent("returned");
+            } else {
+                client.sendEvent("returnFailed");
+            }
+        });
+    }
+
+    public static void createTable() throws SQLException {
+        String sql = "CREATE TABLE IF NOT EXISTS Book (" +
+                "ID INTEGER NOT NULL PRIMARY KEY, " +
+                "title TEXT NOT NULL, " +
+                "author text NOT NULL, " +
+                "issuedBy INTEGER NOT NULL," +
+                "FOREIGN KEY(issuedBy) REFERENCES User(ID)" +
+                ");";
+
+        Statement statement = ConnectionHandler.connection.createStatement();
+        statement.execute(sql);
+    }
+}
diff --git a/src/Store/ConnectionHandler.java b/src/Store/ConnectionHandler.java
new file mode 100644
index 0000000..45d4446
--- /dev/null
+++ b/src/Store/ConnectionHandler.java
@@ -0,0 +1,28 @@
+package Store;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public class ConnectionHandler {
+    String address;
+    public static Connection connection;
+
+    public ConnectionHandler(String address) {
+        this.address = address;
+    }
+
+    public void connect() {
+        try {
+            connection = DriverManager.getConnection(this.address);
+
+            // create tables if they don't exist
+            Book.createTable();
+            User.createTable();
+        } catch (SQLException e) {
+            System.err.println(e.getMessage());
+        }
+    }
+
+    // TODO: disconnect
+}
diff --git a/src/Store/User.java b/src/Store/User.java
new file mode 100644
index 0000000..e414520
--- /dev/null
+++ b/src/Store/User.java
@@ -0,0 +1,120 @@
+package Store;
+
+import Server.JSONMessage;
+import com.corundumstudio.socketio.listener.DataListener;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Map;
+
+public class User {
+    private int id;
+    private final String userName;
+    private final String password;
+
+    public User(String userName, String password) {
+        this.userName = userName;
+        this.password = password;
+    }
+
+    public boolean save() throws SQLException {
+        if (!checkUniqueUsername(userName)) {
+            return false;
+        }
+
+        String sql = "INSERT INTO User (userName, password) VALUES (?, ?)";
+        PreparedStatement statement = ConnectionHandler.connection.prepareStatement(sql);
+
+        statement.setString(1, userName);
+        statement.setString(2, password);
+
+        statement.executeUpdate();
+
+        return true;
+    }
+
+    private boolean checkUniqueUsername(String userName) throws SQLException {
+        String sql = "SELECT * FROM User WHERE userName = '" + userName + "'";
+        Statement statement = ConnectionHandler.connection.createStatement();
+
+        ResultSet response = statement.executeQuery(sql);
+        while (response.next()) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public boolean login() throws SQLException {
+        String sql = "SELECT * FROM User WHERE userName = '" + this.userName + "' AND password = '" + this.password + "'";
+        Statement statement = ConnectionHandler.connection.createStatement();
+
+        boolean loggedIn = false;
+        ResultSet response = statement.executeQuery(sql);
+        while (response.next()) {
+            this.id = response.getInt("ID");
+            loggedIn = true;
+        }
+
+        return loggedIn;
+    }
+
+    public static void createTable() throws SQLException {
+        String sql = "CREATE TABLE IF NOT EXISTS User (" +
+                "ID INTEGER NOT NULL PRIMARY KEY," +
+                "userName TEXT NOT NULL," +
+                "password text NOT NULL" +
+                ");";
+
+        Statement statement = ConnectionHandler.connection.createStatement();
+        statement.execute(sql);
+    }
+
+    public static DataListener<JSONMessage> signUpHandler() {
+        return ((client, data, ackSender) -> {
+            Map<String,String> d = data.getData();
+
+            User user = new User(d.get("userName"), d.get("password"));
+            try {
+                if (user.save()) {
+                    client.sendEvent("signedUp");
+                } else {
+                    client.sendEvent("usernameTaken");
+                    client.sendEvent("signUpFailed");
+                }
+            } catch (SQLException e) {
+                client.sendEvent("signUpFailed");
+                System.out.println(e.getMessage());
+            }
+        });
+    }
+
+    public static DataListener<JSONMessage> loginHandler() {
+        return ((client, data, ackSender) -> {
+            Map<String,String> d = data.getData();
+
+            User user = new User(d.get("userName"), d.get("password"));
+            try {
+                user.login();
+            } catch (SQLException e) {
+                System.out.println(e.getMessage());
+            }
+
+            if (user.login()) {
+                client.sendEvent("loggedIn", user.id);
+            } else {
+                client.sendEvent("loginFailed");
+            }
+        });
+    }
+
+    public String toJSON() {
+        return "{" +
+                "\"id\": "       + id       + "," +
+                "\"userName\": " + userName + "," +
+                "\"password\": " + password +
+                " }";
+    }
+}
\ No newline at end of file