More tests passing

app/src/main/java/krusty/Database.java

@@ -6,6 +6,7 @@ import spark.Response;
 // Likely dependencies for db operations
 import java.sql.Connection;
 import java.sql.DriverManager;
+import java.sql.PreparedStatement;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.text.SimpleDateFormat;
@@ -29,7 +30,7 @@ public class Database {
 	private static final String jdbcString = "jdbc:sqlite::memory:";
 	// private static final String jdbcString = "jdbc:sqlite:krusty.db";
 
-	// Hold a single connection to the database. Note that this is 
+	// Hold a single connection to the database. Note that this is
 	// not a pool, so this is not thread-safe nor efficient.
 	private Connection conn = null;
 
@@ -128,7 +129,8 @@ public class Database {
 		// Helmets, seatbelts and safety goggles on; we need to execute a query.
 		try {
 			Statement stmt = conn.createStatement();
-			StringBuilder query = new StringBuilder("SELECT * FROM pallets JOIN cookies ON pallets.cookie_id = cookies.cookie_id");
+			StringBuilder query = new StringBuilder(
+					"SELECT * FROM pallets JOIN cookies ON pallets.cookie_id = cookies.cookie_id");
 
 			// r is validated here
 			if (r.isPresent()) {
@@ -178,6 +180,67 @@ public class Database {
 	}
 
 	public String createPallet(Request req, Response res) {
+		// This on only has one query param and looks like:
+		// http://localhost:8888/api/v1/pallets?cookie=Amneris
+
+		Optional<Recipe> r = Optional.empty();
+		String cookie = req.queryParams("cookie");
+
+		if (cookie != null) {
+			r = Optional.ofNullable(DefaultRecipes.recipes.stream()
+					.filter(recipe -> recipe.name.equals(cookie))
+					.findFirst().orElse(null));
+		}
+
+		if (r.isEmpty()) {
+			// Return 404
+			res.status(404);
+			return "{}";
+		}
+
+		try (PreparedStatement getRawMaterials = conn.prepareStatement("SELECT * FROM raw_materials WHERE ingredient_name = ?");
+				PreparedStatement decrementRawMaterials = conn.prepareStatement("UPDATE raw_materials SET ingredient_quantity = ingredient_quantity - ? WHERE ingredient_name = ?");
+				PreparedStatement insertPallet = conn.prepareStatement("INSERT INTO pallets (cookie_id, production_date, status) VALUES (?, ?, ?)")) {
+			// Start transaction
+			conn.setAutoCommit(false);
+
+			for(Ingredient i : r.get().ingredients) {
+				getRawMaterials.setString(1, i.name);
+				ResultSet result = getRawMaterials.executeQuery();
+				if (!result.next()) {
+					// Rollback transaction
+					conn.rollback();
+					// Return 500
+					res.status(500);
+					return "{}";
+				}
+
+				// Check if we have enough raw materials
+				if (result.getInt("ingredient_quantity") < i.amount) {
+					// Rollback transaction
+					conn.rollback();
+					// Return 500
+					res.status(500);
+					return "{}";
+				}
+
+				decrementRawMaterials.setInt(1, i.amount * 54); // 5400 / 100
+				decrementRawMaterials.setString(2, i.name);
+				decrementRawMaterials.executeUpdate();
+			}
+
+			insertPallet.setInt(1, 1);
+			insertPallet.setString(2, new SimpleDateFormat("yyyy-MM-dd").format(new Date()));
+			insertPallet.setString(3, "freezer");
+
+			insertPallet.executeUpdate();
+			conn.commit();
+		} catch (SQLException e) {
+			System.out.printf("Error starting transaction: \n%s", e);
+		}
+
+		// TODO: NOT DONE
+
 		// 1. Get query param
 		// 2. Check if cookie exists (is in DefaultRecipes)
 		// 3. Start transaction