From 9b556e9fde7e1d1d48d3d75aca748753ed6074d6 Mon Sep 17 00:00:00 2001
From: tomivt <nguyentommy0708@icloud.com>
Date: Tue, 15 Oct 2024 12:14:38 +0200
Subject: [PATCH] Add questionGateway.php

---
 src/questionGateway.php | 152 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 src/questionGateway.php

diff --git a/src/questionGateway.php b/src/questionGateway.php
new file mode 100644
index 0000000..77d964e
--- /dev/null
+++ b/src/questionGateway.php
@@ -0,0 +1,152 @@
+<?php
+
+require_once("../script/Connection.php");
+require_once("questionEntity.php");
+
+class QuestionGateway
+{
+    private Connection $co;
+
+    public function __construct(Connection $co)
+    {
+        $this -> co = $co;
+    }
+
+    /**
+     * Inserts a new question into the database
+     *
+     * @param QuestionEntity $q The `Question` object to insert
+     * @return bool True if the question was successfully inserted, false otherwise
+     */
+    public function create(QuestionEntity $q) : bool
+    {
+        $query = "
+            INSERT INTO Question 
+            VALUES(:id_q, :question, :answerA, :answerB, :answerC, :answerD, :cAnswer)
+        ";
+        $stmt = $this -> co -> prepare($query);
+
+        return $stmt -> execute([
+            ':id_q' => $q -> getIdquestion(),
+            ':question' => $q -> getQuestion(),
+            ':answerA' => $q -> getAnswerA(),
+            ':answerB' => $q -> getAnswerB(),
+            ':answerC' => $q -> getAnswerC(),
+            ':answerD' => $q -> getAnswerD(),
+            ':cAnswer' => $q -> getCAnswer()
+        ]);
+    }
+
+    /**
+     * Retrieves a question from the database by its ID
+     *
+     * @param int $id The ID of the question to retrieve
+     * @return QuestionEntity|null The `Question` object if found, null otherwise
+     */
+    public function findById(int $id) : ?QuestionEntity
+    {
+        $query = "SELECT * FROM Question WHERE id_question = :id_q";
+        $stmt = $this -> co -> prepare($query);
+        $stmt -> execute([':id' => $id]);
+        $res = $stmt -> fetch(PDO::FETCH_ASSOC);
+
+        if ($res)
+            return new QuestionEntity(
+                $res['id_q'],
+                $res['question'],
+                $res['answerA'],
+                $res['answerB'],
+                $res['answerC'],
+                $res['answerD'],
+                $res['cAnswer'],
+            );
+        return null;
+    }
+
+    /**
+     * Updates the text of and an existing question in the database
+     *
+     * @param QuestionEntity $q The `Question` object with updated information
+     * @return bool True if the text of the question was successfully updated, false otherwise
+     */
+    public function updateText(QuestionEntity $q) : bool
+    {
+        $query = "
+            UPDATE Question
+            SET question = :question
+            WHERE id_question = :id_q
+        ";
+        $stmt = $this -> co -> prepare($query);
+
+        return $stmt -> execute([':question' => $q -> getQuestion()]);
+    }
+
+    /**
+     * Updates the answers of an existing question in the database
+     *
+     * @param QuestionEntity $q The `Question` object with updated information
+     * @return bool True if the answers of the question was successfully updated, false otherwise
+     */
+    public function updateAnswers(QuestionEntity $q) : bool
+    {
+        $query = "
+            UPDATE Question
+            SET answerA = :answerA, answerB = :answerB, 
+                answerC = :answerC, answerD = :answerD, cAnswer = :cAnswer
+            WHERE id_question = :id_q
+        ";
+        $stmt = $this -> co -> prepare($query);
+
+        return $stmt -> execute([
+            ':id_q' => $q -> getIdQuestion(),
+            ':answerA' => $q -> getAnswerA(),
+            ':answerB' => $q -> getAnswerB(),
+            ':answerC' => $q -> getAnswerC(),
+            ':answerD' => $q -> getAnswerD(),
+            ':cAnswer' => $q -> getCAnswer(),
+        ]);
+    }
+
+    /**
+     * Deletes a question from the database by its ID
+     *
+     * @param int $id The ID of the question
+     * @return bool
+     */
+    public function delete(int $id) : bool
+    {
+        $query = "DELETE FROM Question WHERE id_question = :id_q";
+        $stmt = $this -> co -> prepare($query);
+
+        return $stmt -> execute([':id_q' => $id]);
+    }
+
+    /**
+     * Retrieves all quizzes from the database
+     *
+     * @return QuestionEntity[] An array of `Question` objects
+     */
+    public function findAll() : array
+    {
+        $query = "SELECT * FROM Question";
+        $stmt = $this -> co -> prepare($query);
+        $stmt->execute();
+        $res = $stmt -> fetchAll(PDO::FETCH_ASSOC);
+
+        $questions = [];
+
+        foreach ($res as $q)
+            $questions[] = new QuestionEntity(
+                $q['id_question'],
+                $q['question'],
+                $q['answerA'],
+                $q['answerB'],
+                $q['answerC'],
+                $q['answerD'],
+                $q['cAnswer']
+            );
+
+        return $questions;
+    }
+
+}
\ No newline at end of file