update_task_process.php

<?php
session_start();
if (!isset($_SESSION['user']) || $_SESSION['user']['role'] !== 'Team Member') {
    header('Location: login.php');
    exit();
}

require 'db.php.inc';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $taskId = $_POST['task_id'];
    $progress = $_POST['progress'];
    $status = $_POST['status'];

    $errors = [];
    if ($progress == 100 && $status !== 'Completed') {
        $errors[] = "Status must be 'Completed' when progress is 100%.";
    } elseif ($progress > 0 && $progress < 100 && $status !== 'In Progress') {
        $errors[] = "Status must be 'In Progress' when progress is between 1% and 99%.";
    } elseif ($progress == 0 && $status !== 'Pending') {
        $errors[] = "Status must be 'Pending' when progress is 0%.";
    }

    if (!empty($errors)) {
        header("Location: update_task.php?task_id=$taskId&error=" . urlencode(implode(', ', $errors)));
        exit();
    }

    try {
        $stmt = $pdo->prepare("
            UPDATE tasks
            SET progress = :progress, status = :status
            WHERE task_id = :task_id
        ");
        $stmt->execute([
            ':progress' => $progress,
            ':status' => $status,
            ':task_id' => $taskId
        ]);

        header("Location: update_task.php?task_id=$taskId&message=Task updated successfully.");
        exit();
    } catch (PDOException $e) {
        die("Database error: " . $e->getMessage());
    }
}
?>