process-share.php

<?php
require "./helpers/heading.php";
require_once "./helpers/db.php";
$target_dir = "images/";

if (!file_exists($target_dir)) {
    mkdir($target_dir, 0777, true);

}
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Check if user is logged in
    loginGated();
    
    // Check if file is uploaded
    if (isset($_POST['img'])) {
        // Check file size (the value is in bytes, so 2MB is 2097152 bytes)
        if ($_FILES['img']['size'] > 2097152) {
            echo "Sorry, your file is too large. It should be less than 2MB.";
            http_response_code(400);
            exit;
        }

        // // Check if it's an image file
        // $check = getimagesize($_FILES['img']['tmp_name']);
        // if($check === false) {
        //     echo "File is not an image.";
        //     exit;
        // } 
        $dataURL = $_POST['img'];
        $alt_text = htmlspecialchars(trim($_POST['alt_text']));
        $caption = htmlspecialchars(trim($_POST['caption']));

        list($type, $dataURL) = explode(';', $dataURL);
        list(, $dataURL) = explode(',', $dataURL);
        $data = base64_decode($dataURL);

        $filename = uniqid() . '.png';
        $target_file = $target_dir . $filename;

        // Additional validations or processing can be added here

        // Move uploaded file to a designated directory (optional)
        if (file_put_contents($target_file, $data)) {
            $author_id = $_SESSION['userId'];
            $image_url = $target_file;

            $stmt = $db->prepare("INSERT INTO posts (image_url, author_id, alt_text, caption) VALUES (:imageURL, :authorId, :altText, :caption)");
            $stmt->execute(['imageURL' => $image_url, 'authorId' => $author_id, 'altText' => $alt_text, 'caption' => $caption]);
            $stmt->closeCursor();
            $postId = $db->lastInsertId();
            echo "$postId";
        } else {
            echo "Sorry, there was an error uploading your file.";
            http_response_code(400);
        }
    } else {
        echo "No file was uploaded or there was an error in the upload.";
        http_response_code(400);
    }
}
?>