Working migrations script from resources

src/main/java/datamodel/Database.java

@@ -50,6 +50,28 @@ public class Database {
         return true;
     }
 
+    // Reads a file from the resources folder and returns the content as a string
+    private String readResourceFile(String fileName) {
+        String content = "";
+        try {
+            content = new String(getClass().getResourceAsStream(fileName).readAllBytes());
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return content;
+    }
+
+    public void runMigration() {
+        // This path needs to start with a /
+        String migration = readResourceFile("/migration.sql");
+        try {
+            Statement stmt = conn.createStatement();
+            stmt.execute(migration);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+        
     /**
      * Close the connection to the database.
      */

src/main/java/gui/MainApplication.java

@@ -48,6 +48,7 @@ public class MainApplication extends Application {
 	            alert.setContentText("Could not connect to the database! Check console for details.");
 	            alert.showAndWait();
 	        }
+			db.runMigration();
 		} catch(Exception e) {
 			e.printStackTrace();
 		}

src/main/resources/migration.sql

@@ -0,0 +1,50 @@
+PRAGMA foreign_keys = OFF;
+
+DROP TABLE IF EXISTS Tickets;
+DROP TABLE IF EXISTS Reservations;
+DROP TABLE IF EXISTS Showings;
+DROP TABLE IF EXISTS Movies;
+DROP TABLE IF EXISTS Theaters;
+
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS Users (
+    username VARCHAR(50) PRIMARY KEY,
+    name VARCHAR(100),
+    address VARCHAR(255),
+    telephone VARCHAR(20)
+);
+
+CREATE TABLE IF NOT EXISTS Theaters (
+    theater_id SERIAL PRIMARY KEY,
+    name VARCHAR(100) UNIQUE,
+    total_seats INTEGER
+);
+
+CREATE TABLE IF NOT EXISTS Movies (
+    movie_id SERIAL PRIMARY KEY,
+    name VARCHAR(255) UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS Showings (
+    showing_id SERIAL PRIMARY KEY,
+    movie_id INTEGER REFERENCES Movies(movie_id),
+    theater_id INTEGER REFERENCES Theaters(theater_id),
+    show_date DATE,
+    UNIQUE(movie_id, show_date)
+);
+
+CREATE TABLE IF NOT EXISTS Reservations (
+    reservation_id SERIAL PRIMARY KEY,
+    username VARCHAR(50) REFERENCES Users(username),
+    showing_id INTEGER REFERENCES Showings(showing_id),
+    reservation_number VARCHAR(50),
+    FOREIGN KEY (showing_id, reservation_number) REFERENCES Tickets(showing_id, reservation_number)
+);
+
+CREATE TABLE IF NOT EXISTS Tickets (
+    showing_id INTEGER REFERENCES Showings(showing_id),
+    reservation_number VARCHAR(50),
+    PRIMARY KEY (showing_id, reservation_number),
+    FOREIGN KEY (showing_id, reservation_number) REFERENCES Reservations(showing_id, reservation_number)
+);