feat[DbWrapper]: add methods for connecting to database

pom.xml

@@ -62,6 +62,12 @@
           <artifactId>slf4j-simple</artifactId>
           <version>2.0.9</version>
       </dependency>
+      <dependency>
+          <groupId>com.h2database</groupId>
+          <artifactId>h2</artifactId>
+          <version>2.2.224</version>
+          <scope>runtime</scope>
+      </dependency>
   </dependencies>
 
     <build>

src/main/java/edu/group5/app/App.java

@@ -1,10 +1,17 @@
 package edu.group5.app;
 
+import edu.group5.app.control.DbWrapper;
+
 /**
  * Hello world!
  */
 public class App {
   public static void main(String[] args) throws InterruptedException {
-    System.out.println("Hello World!");
+    DbWrapper db = new DbWrapper("test_init.sql");
+    try {
+      System.out.println(db.connect());
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
   }
 }

src/main/java/edu/group5/app/control/DbWrapper.java

@@ -0,0 +1,30 @@
+package edu.group5.app.control;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public class DbWrapper {
+  protected Connection connection;
+  private static final String CONNECTION_TYPE = "jdbc:h2:";
+  private static final String DB_SCRIPT = "INIT=RUNSCRIPT FROM 'classpath:";
+  private String connectionString;
+
+  public DbWrapper(String script) {
+    this(script, "mem:test;");
+  }
+
+  public DbWrapper(String script, String dbPath) {
+    this.connectionString = CONNECTION_TYPE + dbPath + DB_SCRIPT + script + "'";
+  }
+
+  public boolean connect() throws SQLException {
+    try {
+      this.connection = DriverManager.getConnection(this.connectionString);
+    } catch (SQLException SQLe) {
+      SQLe.printStackTrace();
+    }
+    return connection.isValid(0);
+  }
+
+}

src/main/resources/init.sql

@@ -0,0 +1,23 @@
+CREATE TABLE IF NOT EXISTS
+users (
+  user_id int PRIMARY KEY,
+  first_name varchar(20),
+  last_name varchar(20),
+  email varchar(20),
+  password_hash varchar(72)
+);
+
+CREATE TABLE IF NOT EXISTS
+donations (
+  donation_id int PRIMARY KEY,
+  user_id int NOT NULL,
+  organization_id int NOT NULL,
+  amount double NOT NULL,
+  dating timestamp NOT NULL,
+  payment_method varchar(20),
+  CONSTRAINT fk_user
+  FOREIGN KEY (user_id)
+  REFERENCES users(user_id)
+);
+
+

src/main/resources/test_init.sql

@@ -0,0 +1,23 @@
+DROP TABLE IF EXISTS users, donations;
+
+CREATE TABLE IF NOT EXISTS
+users (
+  user_id int PRIMARY KEY,
+  first_name varchar(20),
+  last_name varchar(20),
+  email varchar(20),
+  password_hash varchar(72)
+);
+
+CREATE TABLE IF NOT EXISTS
+donations (
+  donation_id int PRIMARY KEY,
+  user_id int NOT NULL,
+  organization_id int NOT NULL,
+  amount double NOT NULL,
+  dating timestamp NOT NULL,
+  payment_method varchar(20),
+  CONSTRAINT fk_user
+  FOREIGN KEY (user_id)
+  REFERENCES users(user_id)
+);