<?php
/*
* Created on Tue Oct 31 2023
* Copyright (c) 2023 BitsHost
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* Here you may host your app for free:
* https://bitshost.biz/
*/
namespace Common\Bmvc;
use upMVC\Database;
use PDO;
/**
* BaseModel
*/
class BaseModel
{
/**
* @var PDO
*/
protected $conn;
/**
* Constructor.
*/
public function __construct()
{
$this->conn = (new Database())->getConnection();
}
/**
* Creates a new record in the database.
*
* @param array $data The data to be inserted.
* @param string $table The table name.
* @return int|false The last inserted ID or false on failure.
*/
public function create(array $data, string $table)
{
if (empty($data)) {
return false;
}
$sanitizedData = array_map([$this, 'sanitize'], $data);
$placeholders = implode(', ', array_fill(0, count($sanitizedData), '?'));
$columns = implode(', ', array_keys($sanitizedData));
$stmt = $this->conn->prepare("INSERT INTO $table ($columns) VALUES ($placeholders)");
if (!$stmt) {
return false;
}
// Bind parameter with value
$i = 1;
foreach ($sanitizedData as $value) {
$stmt->bindValue($i++, $value);
}
$success = $stmt->execute();
if ($success) {
return $this->conn->lastInsertId();
} else {
return false;
}
}
/**
* Reads a record from the database.
*
* @param int $id The record ID.
* @param string $table The table name.
* @return array|null The record data or null on failure.
*/
public function read(int $id, string $table)
{
$sanitizedId = $this->sanitize($id);
$stmt = $this->conn->prepare("SELECT * FROM $table WHERE id = :id");
if (!$stmt) {
return null;
}
$stmt->bindParam(':id', $sanitizedId);
$stmt->execute();
return $stmt->fetch();
}
/**
* Reads all records from the database.
*
* @param string $table The table name.
* @return array The records data.
*/
public function readAll(string $table)
{
$stmt = $this->conn->prepare("SELECT * FROM $table");
if (!$stmt) {
return [];
}
$stmt->execute();
return $stmt->fetchAll(PDO::FETCH_ASSOC);
}
/**
* Reads records from the database with pagination.
*
* @param string $table The table name.
* @param int $page The current page.
* @param int $pageSize The number of records per page.
* @return array The records data.
*/
public function readWithPagination(string $table, int $page, int $pageSize)
{
$offset = ($page - 1) * $pageSize;
$stmt = $this->conn->prepare("SELECT * FROM $table LIMIT :offset, :pageSize");
if (!$stmt) {
return [];
}
$stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
$stmt->bindParam(':pageSize', $pageSize, PDO::PARAM_INT);
$stmt->execute();
return $stmt->fetchAll(PDO::FETCH_ASSOC);
}
/**
* Updates a record in the database.
*
* @param int $id The record ID.
* @param array $data The data to be updated.
* @param string $table The table name.
* @return bool True on success, false on failure.
*/
public function update(int $id, array $data, string $table)
{
if (empty($data)) {
return false;
}
$sanitizedId = $this->sanitize($id);
$sanitizedData = array_map([$this, 'sanitize'], $data);
$setClause = implode(', ', array_map(fn($key) => "$key = :$key", array_keys($sanitizedData)));
$stmt = $this->conn->prepare("UPDATE $table SET $setClause WHERE id = :id");
if (!$stmt) {
return false;
}
$stmt->bindParam(':id', $sanitizedId);
foreach ($sanitizedData as $key => $value) {
$stmt->bindValue(":$key", $value);
}
$success = $stmt->execute();
$rowCount = $stmt->rowCount();
return $rowCount > 0 ? $success : false;
}
/**
* Deletes a record from the database.
*
* @param int $id The record ID.
* @param string $table The table name.
* @return bool True on success, false on failure.
*/
public function delete(int $id, string $table)
{
$sanitizedId = $this->sanitize($id);
$stmt = $this->conn->prepare("DELETE FROM $table WHERE id = :id");
if (!$stmt) {
return false;
}
$stmt->bindParam(':id', $sanitizedId);
$success = $stmt->execute();
$rowCount = $stmt->rowCount();
return $rowCount > 0 ? $success : false;
}
/**
* Destructor.
*/
public function __destruct()
{
$this->conn = null;
}
/**
* Sanitizes the input data to prevent SQL injection and XSS attacks.
*
* @param mixed $input The input data to be sanitized.
* @return string The sanitized input.
*/
private function sanitize($input)
{
if (is_string($input)) {
// Sanitize string input
$sanitizedInput = filter_var($input, FILTER_SANITIZE_STRING, FILTER_FLAG_NO_ENCODE_QUOTES);
if ($sanitizedInput === false) {
return "Error during sanitization.";
}
// Escape special characters to prevent XSS
return htmlspecialchars($sanitizedInput, ENT_QUOTES | ENT_HTML5, 'UTF-8');
} elseif (is_array($input)) {
// Recursively sanitize array elements
return array_map([$this, 'sanitize'], $input);
} else {
// Return non-string input as is
return $input;
}
}
}
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