Web/chat/php/model.php

<?php
class Connection {
	private $charset= 'utf8mb4';
	protected function connect (){
		include "../../creds.php";
		$dsn= "mysql:host=$sqlserver;charset=$this->charset";
			try {
					$pdo= new pdo ($dsn,$sqluser,$sqlpass); 
					$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
					$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false );
					$pdo->setattribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
					$pdo->exec('USE '.$dbname.'_chat');
					return $pdo;
				}
			 catch (Exception $e) {
					echo 'Error: '.$e->getMessage();
			}
	}
}

class Model extends Connection {
	public function getUsers($id){
		include "../../creds.php";
		//$sql="SELECT * FROM users WHERE user_id != ?";
		$pdo = $this->connect();
		$pdo->exec('USE '.$dbname);
		$sql = "SELECT * FROM `auth` WHERE `id` != ?";
		$stmt=$pdo->prepare($sql);
		$stmt->execute([$id]);
		//$result=$stmt->fetchAll();
		$result = array();
		$fetch = $stmt->fetchAll();
		for($i = 0; $i<count($fetch); $i++){
			$sndarray = array();
			$sndarray["id"] = $fetch[$i]["id"];
			if($fetch[$i]["fullname"] != ""){
				$sndarray["name"] = $fetch[$i]["fullname"];
			}else{
				$sndarray["name"] = $fetch[$i]["username"];
			}
			$sndarray["userimg"] = $siteurl."/API/request.php?type=image&subtype=user&id=".$fetch[$i]["id"];

			$pdo->exec('USE '.$dbname."_chat");
			$sql = "SELECT * FROM notifications WHERE userid = ? AND fromuserid = ?; ";
			$stmtcheck=$pdo->prepare($sql);
			$stmtcheck->execute([$id, $fetch[$i]["id"]]);
			$resultcheck = $stmtcheck->fetchAll(); 
			if($stmtcheck && $stmtcheck->rowCount() > 0){
				$sndarray["unread"] = $resultcheck[0]["unread"];
			}else{
				$sndarray["unread"] = 0;
			}

			$result[$i] = $sndarray;
		}
		return $result;
	}

	public function insertChat($id,$user2_id, $message, $time){
		$conn = $this->connect();
		$sql = "SELECT * FROM notifications WHERE userid = ? AND fromuserid = ?; ";
		$stmtcheck=$conn->prepare($sql);
		$stmtcheck->execute([$user2_id, $id]);
		$result = $stmtcheck->fetchAll(); 
		if($stmtcheck && $stmtcheck->rowCount() > 0){
			$unread = $result[0]["unread"];
		}

		if(isset($unread)){
			$sql = "UPDATE notifications SET unread = ? WHERE userid = ? AND fromuserid = ?;";
			$stmtinsert=$conn->prepare($sql);
			$stmtinsert->execute([($unread+1), $user2_id, $id]);
		}else{
			$sql="INSERT INTO notifications (userid, fromuserid, unread) VALUES (?, ?, 1);";
			$stmtinsert=$conn->prepare($sql);
			$stmtinsert->execute([$user2_id, $id]);
		}

		$sql="INSERT INTO chats (chat_user_id, chat_user2_id, chat_message, chat_sent_by, chat_date) VALUES(?,?,?,?,?)";
		$stmt=$conn->prepare($sql);
		$stmt->execute([$id,$user2_id, $message, $id, $time]);
		$result= $stmt->fetchAll();
		return $result;
	}

	public function thisUser($user_name, $pass){
		$sql="SELECT * From users WHERE user_name =? AND users_pass= ?";
		$stmt= $this->connect()->prepare($sql);
		$stmt->execute([$user_name, $pass]);
		$result=$stmt->fetchAll();
		return $result;
	}

	public function getChats($id1, $id2){
		$conn = $this->connect();
		$sql = "SELECT * FROM notifications WHERE userid = ? AND fromuserid = ?";
		$stmtcheck=$conn->prepare($sql);
		$stmtcheck->execute([$id1, $id2]);
		$result = $stmtcheck->fetchAll(); 
		if($stmtcheck->rowCount() > 0){
			$sql = "DELETE FROM notifications WHERE userid = ? AND fromuserid = ?";
			$stmtinsert=$conn->prepare($sql);
			$stmtinsert->execute([$id1, $id2]);
		}

		$sql="SELECT * FROM chats WHERE chat_user_id = ? and chat_user2_id=? OR chat_user_id=? and chat_user2_id=?";
		$stmt=$conn->prepare($sql);
		$stmt->execute([$id1, $id2, $id2, $id1]);
		$result=$stmt->fetchAll();
		return $result;
	}
}

?>