<?php

function sendmessage($message_content, $message_by, $message_to) {
    global $db;
    $req = $db->prepare('INSERT INTO `messages` (message_content, message_by, message_to, message_datetime) VALUES (:message_content, :message_by, :message_to, NOW())');
    $req->execute(array(
        "message_content"=>$message_content,
        "message_by"=>$message_by,
        "message_to"=>$message_to
    ));
}


session_reset();
session_start();
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$root = realpath($_SERVER["DOCUMENT_ROOT"]);
require "$root/database/credentials.php";
// Connect the database
try {
	$db = new PDO("mysql:host=$host;dbname=$database;charset=utf8", 
		$user, 
		$password, 
		array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
		));
} catch (Exception $e) {
	die("Error : ".$e->getMessage());
}
$_SESSION['error_msg'] = "";
if (isset($_POST['submit'])) {
    if (isset($_POST['message_by'])) {
        $message_by = $_POST['message_by'];
    } else {
        $_SESSION['error_msg'] .= "Error: No message author.\n";
    }
    if (isset($_POST['message_to'])) {
        $message_to = $_POST['message_to'];
    } else {
        $_SESSION['error_msg'] .= "Error: No message destinator.\n";
    } if (isset($_POST['message_content'])) {
        $message_content = $_POST['message_content'];
    } else {
        $_SESSION['error_msg'] .= "Error: No message content.\n";
    }

    if (isset($_SESSION['error_msg']) and $_SESSION['error_msg'] != "") {
        header('Location: /discussion');
    } else {
        sendmessage($message_content, $message_by, $message_to);
        header('Location: /discussion/messages/?author='.$message_to);
    }
}