<?php
/*
*  PDO DATABASE CLASS
*  Connects Database Using PDO
 *  Creates Prepeared Statements
 *  Binds params to values
 *  Returns rows and results
*/
class Database {
    private $host = DB_HOST;
    private $user = DB_USER;
    private $pass = DB_PASS;
    private $dbname = DB_NAME;

    private $dbh;
    private $error;
    private $stmt;

    public function __construct() {
        // Set DSN
        $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
        $options = array (
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );
        // Create a new PDO instanace
        try {
            $this->dbh = new PDO ($dsn, $this->user, $this->pass, $options);
        }       // Catch any errors
        catch ( PDOException $e ) {
            $this->error = $e->getMessage();
        }
    }

    // Prepare statement with query
    public function query($query) {
        $this->stmt = $this->dbh->prepare($query);
    }

    // Bind values
    public function bind($param, $value, $type = null) {
        if (is_null ($type)) {
            switch (true) {
                case is_int ($value) :
                    $type = PDO::PARAM_INT;
                    break;
                case is_bool ($value) :
                    $type = PDO::PARAM_BOOL;
                    break;
                case is_null ($value) :
                    $type = PDO::PARAM_NULL;
                    break;
                default :
                    $type = PDO::PARAM_STR;
            }
        }
        $this->stmt->bindValue($param, $value, $type);
    }

    // Execute the prepared statement
    public function execute(){
        return $this->stmt->execute();
    }

    // Get result set as array of objects
    public function resultset(){
        $this->execute();
        return $this->stmt->fetchAll(PDO::FETCH_OBJ);
    }

    // Get single record as object
    public function single(){
        $this->execute();
        return $this->stmt->fetch(PDO::FETCH_OBJ);
    }

    // Get record row count
    public function rowCount(){
        return $this->stmt->rowCount();
    }

    // Returns the last inserted ID
    public function lastInsertId(){
        return $this->dbh->lastInsertId();
    }