Add signin

2 files changed, 78 insertions, 8 deletions

diff --git a/php/header.php b/php/header.php
index 3f7279b..8648b2a 100755
--- a/php/header.php
+++ b/php/header.php
@@ -18,9 +18,22 @@
  */
 
 require_once ROOT . '/php/replace.php';
+require_once ROOT . '/php/session.php';
+
+$username = get_username();
+
+if ($username === null) {
+    $account = import(ROOT . '/html/guest.html');
+} else {
+    $account = replace(ROOT . '/html/account.html', [
+        '{{username}}' => htmlspecialchars($username, ENT_QUOTES, 'UTF-8')
+    ]);
+}
 
 $targets = [
-    '{{navbar}}' => import(ROOT . '/html/navbar.html')
+    '{{navbar}}' => replace(ROOT . '/html/navbar.html', [
+        '{{account}}' => $account
+    ])
 ];
 
 $html = replace(ROOT . '/html/header.html', $targets);
diff --git a/php/session.php b/php/session.php
index 7895dfb..acb2df3 100755
--- a/php/session.php
+++ b/php/session.php
@@ -17,20 +17,63 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-function start_session(): void {
-    if (session_status() === PHP_SESSION_ACTIVE) {
-        return;
-    }
+const SESSION_LIFETIME = 60 * 60 * 24 * 365;
 
-    session_set_cookie_params([
-        'lifetime' => 0,
+function session_cookie(int $lifetime): array {
+    return [
+        'lifetime' => $lifetime,
         'path'     => '/',
         'secure'   => true,
         'httponly' => true,
         'samesite' => 'Strict'
-    ]);
+    ];
+}
+
+function has_session(): bool {
+    if (session_status() === PHP_SESSION_ACTIVE) {
+        return true;
+    }
+
+    return isset($_COOKIE[session_name()]);
+}
+
+function start_session(): void {
+    if (session_status() === PHP_SESSION_ACTIVE) {
+        return;
+    }
+
+    ini_set('session.gc_maxlifetime', (string)SESSION_LIFETIME);
+
+    session_set_cookie_params(session_cookie(0));
 
     session_start();
+
+    if (!empty($_SESSION['remember'])) {
+        remember_session();
+    }
+}
+
+function remember_session(): void {
+    $parameters            = session_cookie(SESSION_LIFETIME);
+    $parameters['expires'] = time() + $parameters['lifetime'];
+
+    unset($parameters['lifetime']);
+
+    setcookie(session_name(), session_id(), $parameters);
+}
+
+function sign_in(int $user_id, string $username, bool $remember): void {
+    start_session();
+
+    session_regenerate_id(true);
+
+    $_SESSION['user_id']  = $user_id;
+    $_SESSION['username'] = $username;
+    $_SESSION['remember'] = $remember;
+
+    if ($remember) {
+        remember_session();
+    }
 }
 
 function set_user_id(int $user_id): void {
@@ -42,9 +85,23 @@ function set_user_id(int $user_id): void {
 }
 
 function get_user_id(): ?int {
+    if (!has_session()) {
+        return null;
+    }
+
     start_session();
 
     return isset($_SESSION['user_id']) ? (int)$_SESSION['user_id'] : null;
 }
 
+function get_username(): ?string {
+    if (!has_session()) {
+        return null;
+    }
+
+    start_session();
+
+    return isset($_SESSION['username']) ? (string)$_SESSION['username'] : null;
+}
+
 ?>