Installer: configurable videos folder

install.php now takes the videos path (form field / --videos= CLI flag),
persists it into config.php, and creates the directory if missing.
config.example.php default changed from a dev path to /srv/courses.

config.example.php

@@ -5,7 +5,7 @@
 //   /srv/media/courses/
 //     Course 1/Intro/Video1.mp4
 //     Course 2/Module 3/Advanced/lesson.mp4
-define('VIDEOS_ROOT', '/home/harwinder/Development/coursehub/videos');
+define('VIDEOS_ROOT', '/srv/courses');
 
 define('DB_HOST', '127.0.0.1');
 define('DB_PORT', 3306);

install.php

@@ -2,7 +2,7 @@
 // CourseHub installer — sets up the database and schema.
 //
 // Browser:  open install.php and fill in the form.
-// CLI:      php install.php [db_admin_user] [db_admin_pass]
+// CLI:      php install.php [db_admin_user] [db_admin_pass] [--videos=/path/to/courses]
 //
 // Steps performed:
 //   1. Creates config.php from config.example.php if missing (edit it, re-run).
@@ -51,8 +51,17 @@ require_once __DIR__ . '/config.php';
 
 // -- Collect input -----------------------------------------------------------
 if ($isCli) {
-    $adminUser = $_SERVER['argv'][1] ?? '';
+    $args = array_slice($_SERVER['argv'], 1);
-    $adminPass = $_SERVER['argv'][2] ?? '';
+    $videosRoot = '';
+    foreach ($args as $i => $a) {
+        if (str_starts_with($a, '--videos=')) {
+            $videosRoot = substr($a, strlen('--videos='));
+            unset($args[$i]);
+        }
+    }
+    $args      = array_values($args);
+    $adminUser = $args[0] ?? '';
+    $adminPass = $args[1] ?? '';
     $appUser   = '';
     $appPass   = '';
     $run       = true;
@@ -61,6 +70,7 @@ if ($isCli) {
     $adminPass  = $_POST['admin_pass'] ?? '';
     $appUser    = trim($_POST['app_user'] ?? '');
     $appPass    = $_POST['app_pass'] ?? '';
+    $videosRoot = trim($_POST['videos_root'] ?? '');
     $run        = $_SERVER['REQUEST_METHOD'] === 'POST';
 }
 
@@ -70,7 +80,7 @@ if (!$run) {
 }
 
 // -- Run the installation ----------------------------------------------------
-[$done, $steps, $notice] = performInstall($adminUser, $adminPass, $appUser, $appPass);
+[$done, $steps, $notice] = performInstall($adminUser, $adminPass, $appUser, $appPass, $videosRoot);
 if ($done && @file_put_contents($lockFile, date('c') . "\n") === false) {
     $steps[] = [false, 'Could not write .install.lock — the installer will stay re-runnable. '
         . 'Delete or protect install.php on a production server.'];
@@ -80,7 +90,7 @@ respond($steps, $done, $notice);
 // -----------------------------------------------------------------------------
 
 function performInstall(string $adminUser, string $adminPass,
-                        string $appUser, string $appPass): array
+                        string $appUser, string $appPass, string $videosRoot): array
 {
     $steps  = [];
     $notice = '';
@@ -162,9 +172,33 @@ function performInstall(string $adminUser, string $adminPass,
             }
         }
 
-        if (!is_dir(VIDEOS_ROOT)) {
+        // Videos folder: optionally persist a new path into config.php, then
-            $steps[] = [false, 'Warning: VIDEOS_ROOT (' . VIDEOS_ROOT . ') does not exist yet — '
+        // make sure the effective path exists.
-                . 'set it in config.php before scanning.'];
+        $effectiveRoot = VIDEOS_ROOT;
+        if ($videosRoot !== '' && $videosRoot !== VIDEOS_ROOT) {
+            $cfgFile = __DIR__ . '/config.php';
+            $cfg = file_get_contents($cfgFile);
+            $new = preg_replace(
+                "/define\('VIDEOS_ROOT',\s*'[^']*'\);/",
+                "define('VIDEOS_ROOT', '" . addslashes($videosRoot) . "');",
+                $cfg, 1, $replaced
+            );
+            if ($replaced === 1 && @file_put_contents($cfgFile, $new) !== false) {
+                $effectiveRoot = $videosRoot;
+                $steps[] = [true, 'Set VIDEOS_ROOT in config.php to ' . $videosRoot . '.'];
+            } else {
+                $steps[] = [false, 'Could not update config.php — set VIDEOS_ROOT to '
+                    . $videosRoot . ' manually.'];
+            }
+        }
+        if (!is_dir($effectiveRoot)) {
+            if (@mkdir($effectiveRoot, 0755, true)) {
+                $steps[] = [true, 'Created videos folder ' . $effectiveRoot . '.'];
+            } else {
+                $steps[] = [false, 'Warning: videos folder ' . $effectiveRoot . ' does not exist '
+                    . 'and could not be created — create it (or fix VIDEOS_ROOT in config.php) '
+                    . 'before scanning.'];
+            }
         }
 
         $notice = 'Installation complete. Open the app, log in, and use "Rescan library" '
@@ -237,6 +271,16 @@ function renderPage(?array $steps, bool $done, string $notice): void
             <div class="col"><input class="form-control" type="password" name="admin_pass" placeholder="password"></div>
           </div>
         </div>
+        <div>
+          <div class="fw-semibold mb-1">Videos folder</div>
+          <div class="form-text mb-2">
+            Absolute path on this server containing your course folders.
+            Saved to config.php; created if it doesn't exist.
+          </div>
+          <input class="form-control" name="videos_root"
+                 value="<?= $e($_POST['videos_root'] ?? (defined('VIDEOS_ROOT') ? VIDEOS_ROOT : '')) ?>"
+                 placeholder="/srv/courses">
+        </div>
         <div>
           <div class="fw-semibold mb-1">First login account <span class="text-secondary fw-normal">(optional)</span></div>
           <div class="row g-2">