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database.php
62
database.php
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@ -3,7 +3,6 @@
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use PDO;
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Class Database{
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global $db_config;
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private $pdo;
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private $type;
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private $table;
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@ -12,35 +11,69 @@ Class Database{
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private $limit;
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private $query;
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/**
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* Constructor method to initialize the PDO instance
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*/
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public function __construct(){
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$this->pdo = new PDO('mysql:host=' . $db_config['host'] . ';dbname=' . $db_config['database'] . ';charset=utf8mb4', $db_config['username'], $db_config['password']);
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}
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/**
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* Method to start a SELECT query and specify columns
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*/
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public function select($columns = "*"){
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$this->type = "SELECT";
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$this->columns = $columns;
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}
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/**
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* Method to specify the table to query
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*/
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public function from($table){
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$this->table = $table;
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}
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public function where($key, value){
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/**
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* Method to add a WHERE clause to the query
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*/
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public function where($key, $value){
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$this->where = array($key, $value);
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}
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public function andWhere($key, value){
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/**
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* Method to add additional conditions to the WHERE clause
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*/
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public function andWhere($key, $value){
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if(!$this->where) $this->where = array();
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$this->where[$key] = $value;
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}
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/**
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* Method to add a LIMIT clause to the query
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*/
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public function limit($number){
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$this->limit = $number;
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}
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/**
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* Method to execute the query and return all results
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*/
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public function all(){
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$this->query = $this->type . ' ' . $this->columns . ' FROM ' . $this->table;
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/**
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* Check if a WHERE clause is set, if so, then append it to the query.
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* Then construct WHERE conditions using placeholders for prepared statements and
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* join the WHERE conditions with AND and append them to the query
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*/
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if(!empty($this->where)){
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$whereClauses = [];
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foreach($this->where as $condition){
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@ -54,6 +87,11 @@ Class Database{
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}
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$results = $this->pdo->prepare($Query);
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/**
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* Bind the values from the WHERE clause to the prepared statement
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*/
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foreach($this->where as $condition){
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$results->bindValue(':' . $condition[0], $condition[1]);
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}
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@ -62,9 +100,19 @@ Class Database{
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return $results->fetchAll();
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}
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/**
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* Method to execute the query and return a single result
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*/
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public function one(){
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$this->query = $this->type . ' ' . $this->columns . ' FROM ' . $this->table;
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/**
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* Check if a WHERE clause is set, if so, then append it to the query.
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* Then construct WHERE conditions using placeholders for prepared statements and
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* join the WHERE conditions with AND and append them to the query
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*/
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if(!empty($this->where)){
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$whereClauses = [];
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foreach($this->where as $condition){
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@ -73,9 +121,13 @@ Class Database{
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$this->query .= ' WHERE ' . implode(' AND ', $whereClauses);
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}
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$this->query .= " LIMIT " . $this->limit;
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$this->query .= " LIMIT 1";
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$results = $this->pdo->prepare($Query);
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/**
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* Bind the values from the WHERE clause to the prepared statement
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*/
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foreach($this->where as $condition){
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$results->bindValue(':' . $condition[0], $condition[1]);
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}
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@ -53,6 +53,6 @@ class Router{
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// '/contact' => 'controllers/contact.php',
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// ];
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// $router = (new Router)->routeToController($routes);
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// $router = Router::routeToController($routes);
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?>
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@ -20,6 +20,6 @@ class Template{
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}
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// $templ = (new Template)->render('about', '['title' => 'About']');
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// $templ = Template::render('about', '['title' => 'About']');
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?>
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