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actions.php
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<?php
include("functions.php");
if ($_GET['action'] == "loginSignup") {
$error = "";
if (!$_POST['email']) {
$error = "An email address is required.";
} else if (!$_POST['password']) {
$error = "A password is required";
} else if (filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) === false) {
$error = "Please enter a valid email address.";
}
if ($error != "") {
echo $error;
exit();
}
if ($_POST['loginActive'] == "0") {
$query = "SELECT * FROM users WHERE email = '". mysqli_real_escape_string($link, $_POST['email'])."' LIMIT 1";
$result = mysqli_query($link, $query);
if (mysqli_num_rows($result) > 0) $error = "That email address is already taken.";
else {
$query = "INSERT INTO users (`email`, `password`) VALUES ('". mysqli_real_escape_string($link, $_POST['email'])."', '". mysqli_real_escape_string($link, $_POST['password'])."')";
if (mysqli_query($link, $query)) {
$_SESSION['id'] = mysqli_insert_id($link);
$query = "UPDATE users SET password = '". md5(md5($_SESSION['id']).$_POST['password']) ."' WHERE id = ".$_SESSION['id']." LIMIT 1";
mysqli_query($link, $query);
echo 1;
} else {
$error = "Couldn't create user - please try again later";
}
}
} else {
$query = "SELECT * FROM users WHERE email = '". mysqli_real_escape_string($link, $_POST['email'])."' LIMIT 1";
$result = mysqli_query($link, $query);
$row = mysqli_fetch_assoc($result);
if ($row['password'] == md5(md5($row['id']).$_POST['password'])) {
echo 1;
$_SESSION['id'] = $row['id'];
} else {
$error = "Could not find that username/password combination. Please try again.";
}
}
if ($error != "") {
echo $error;
exit();
}
}
if ($_GET['action'] == 'toggleFollow') {
$query = "SELECT * FROM isFollowing WHERE follower = ". mysqli_real_escape_string($link, $_SESSION['id'])." AND isFollowing = ". mysqli_real_escape_string($link, $_POST['userId'])." LIMIT 1";
$result = mysqli_query($link, $query);
if (mysqli_num_rows($result) > 0) {
$row = mysqli_fetch_assoc($result);
mysqli_query($link, "DELETE FROM isFollowing WHERE id = ". mysqli_real_escape_string($link, $row['id'])." LIMIT 1");
echo "1";
} else {
mysqli_query($link, "INSERT INTO isFollowing (follower, isFollowing) VALUES (". mysqli_real_escape_string($link, $_SESSION['id']).", ". mysqli_real_escape_string($link, $_POST['userId']).")");
echo "2";
}
}
if ($_GET['action'] == 'postTweet') {
if (!$_POST['tweetContent']) {
echo "Your tweet is empty!";
} else if (strlen($_POST['tweetContent']) > 140) {
echo "Your tweet is too long!";
} else {
mysqli_query($link, "INSERT INTO tweets (`tweet`, `userid`, `date`) VALUES ('". mysqli_real_escape_string($link, $_POST['tweetContent'])."', ". mysqli_real_escape_string($link, $_SESSION['id']).", NOW())");
echo "1";
}
}
?>