Added configuration option to only allow OpenID logins.

If $config['site']['openidonly'] is set to true:
* the Login/Register pages will be removed from the navigation;
* directly accesses to the Login/Register pages will redirect to the
  OpenID login page;
* most links to the Login/Register pages will link to the OpenID login
  page instead.

The user will still need to set a password to access the API and RSS
feeds.

24 files changed, 108 insertions, 44 deletions

diff --git a/README b/README
index 12c465869..e37934aaa 100644
--- a/README
+++ b/README
@@ -940,6 +940,8 @@ closed: If set to 'true', will disallow registration on your site.
 	the service, *then* set this variable to 'true'.
 inviteonly: If set to 'true', will only allow registration if the user
 	    was invited by an existing user.
+openidonly: If set to 'true', will only allow registrations and logins
+	    through OpenID.
 private: If set to 'true', anonymous users will be redirected to the
          'login' page. Also, API methods that normally require no
          authentication will require it. Note that this does not turn
diff --git a/actions/all.php b/actions/all.php
index f06ead2a8..5db09a0e6 100644
--- a/actions/all.php
+++ b/actions/all.php
@@ -88,7 +88,9 @@ class AllAction extends ProfileAction
             }
         }
         else {
-            $message .= sprintf(_('Why not [register an account](%%%%action.register%%%%) and then nudge %s or post a notice to his or her attention.'), $this->user->nickname);
+            $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and then nudge %s or post a notice to his or her attention.'),
+                                (!common_config('site','openidonly')) ? 'register' : 'openidlogin',
+                                $this->user->nickname);
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/confirmaddress.php b/actions/confirmaddress.php
index 725c1f1e3..3c41a5c70 100644
--- a/actions/confirmaddress.php
+++ b/actions/confirmaddress.php
@@ -67,7 +67,11 @@ class ConfirmaddressAction extends Action
         parent::handle($args);
         if (!common_logged_in()) {
             common_set_returnto($this->selfUrl());
-            common_redirect(common_local_url('login'));
+            if (!common_config('site', 'openidonly')) {
+                common_redirect(common_local_url('login'));
+            } else {
+                common_redirect(common_local_url('openidlogin'));
+            }
             return;
         }
         $code = $this->trimmed('code');
diff --git a/actions/favorited.php b/actions/favorited.php
index 156c7a700..a3d1a5e20 100644
--- a/actions/favorited.php
+++ b/actions/favorited.php
@@ -153,7 +153,8 @@ class FavoritedAction extends Action
             $message .= _('Be the first to add a notice to your favorites by clicking the fave button next to any notice you like.');
         }
         else {
-            $message .= _('Why not [register an account](%%action.register%%) and be the first to add a notice to your favorites!');
+            $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and be the first to add a notice to your favorites!'),
+                                (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/groupsearch.php b/actions/groupsearch.php
index c50466ce6..7437166e6 100644
--- a/actions/groupsearch.php
+++ b/actions/groupsearch.php
@@ -82,7 +82,8 @@ class GroupsearchAction extends SearchAction
                 $message = _('If you can\'t find the group you\'re looking for, you can [create it](%%action.newgroup%%) yourself.');
             }
             else {
-                $message = _('Why not [register an account](%%action.register%%) and [create the group](%%action.newgroup%%) yourself!');
+                $message = sprintf(_('Why not [register an account](%%%%action.%s%%%%) and [create the group](%%%%action.newgroup%%%%) yourself!'),
+                                   (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
             }
             $this->elementStart('div', 'guide');
             $this->raw(common_markup_to_html($message));
diff --git a/actions/invite.php b/actions/invite.php
index 26c951ed2..bdc0d34cb 100644
--- a/actions/invite.php
+++ b/actions/invite.php
@@ -235,7 +235,7 @@ class InviteAction extends CurrentUserDesignAction
                         common_root_url(),
                         $personal,
                         common_local_url('showstream', array('nickname' => $user->nickname)),
-                        common_local_url('register', array('code' => $invite->code)));
+                        common_local_url((!common_config('site', 'openidonly')) ? 'register' : 'openidlogin', array('code' => $invite->code)));
 
         mail_send($recipients, $headers, $body);
     }
diff --git a/actions/login.php b/actions/login.php
index 50de83f6f..c20854f15 100644
--- a/actions/login.php
+++ b/actions/login.php
@@ -65,6 +65,8 @@ class LoginAction extends Action
      *
      * Switches on request method; either shows the form or handles its input.
      *
+     * Checks if only OpenID is allowed and redirects to openidlogin if so.
+     *
      * @param array $args $_REQUEST data
      *
      * @return void
@@ -73,7 +75,9 @@ class LoginAction extends Action
     function handle($args)
     {
         parent::handle($args);
-        if (common_is_real_login()) {
+        if (common_config('site', 'openidonly')) {
+            common_redirect(common_local_url('openidlogin'));
+        } else if (common_is_real_login()) {
             $this->clientError(_('Already logged in.'));
         } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
             $this->checkLogin();
diff --git a/actions/noticesearch.php b/actions/noticesearch.php
index 49b473d9e..90b3309cf 100644
--- a/actions/noticesearch.php
+++ b/actions/noticesearch.php
@@ -121,7 +121,9 @@ class NoticesearchAction extends SearchAction
                 $message = sprintf(_('Be the first to [post on this topic](%%%%action.newnotice%%%%?status_textarea=%s)!'), urlencode($q));
             }
             else {
-                $message = sprintf(_('Why not [register an account](%%%%action.register%%%%) and be the first to  [post on this topic](%%%%action.newnotice%%%%?status_textarea=%s)!'), urlencode($q));
+                $message = sprintf(_('Why not [register an account](%%%%action.%s%%%%) and be the first to [post on this topic](%%%%action.newnotice%%%%?status_textarea=%s)!'),
+                                   (!common_config('site','openidonly')) ? 'register' : 'openidlogin',
+                                   urlencode($q));
             }
 
             $this->elementStart('div', 'guide');
diff --git a/actions/public.php b/actions/public.php
index d0317ac70..dd128925b 100644
--- a/actions/public.php
+++ b/actions/public.php
@@ -183,7 +183,8 @@ class PublicAction extends Action
         }
         else {
             if (! (common_config('site','closed') || common_config('site','inviteonly'))) {
-                $message .= _('Why not [register an account](%%action.register%%) and be the first to post!');
+                $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and be the first to post!'),
+                                    (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
             }
 	}
 
@@ -238,9 +239,11 @@ class PublicAction extends Action
     function showAnonymousMessage()
     {
         if (! (common_config('site','closed') || common_config('site','inviteonly'))) {
-	    $m = _('This is %%site.name%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
-                  'based on the Free Software [Laconica](http://laconi.ca/) tool. ' .
-                  '[Join now](%%action.register%%) to share notices about yourself with friends, family, and colleagues! ([Read more](%%doc.help%%))');
+            $m = sprintf(_('This is %%%%site.name%%%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
+                           'based on the Free Software [Laconica](http://laconi.ca/) tool. ' .
+                           '[Join now](%%%%action.%s%%%%) to share notices about yourself with friends, family, and colleagues! ' .
+                           '([Read more](%%%%doc.help%%%%))'),
+                         (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         } else {
             $m = _('This is %%site.name%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
                    'based on the Free Software [Laconica](http://laconi.ca/) tool.');
diff --git a/actions/publictagcloud.php b/actions/publictagcloud.php
index e9f33d58b..a2772869d 100644
--- a/actions/publictagcloud.php
+++ b/actions/publictagcloud.php
@@ -72,7 +72,8 @@ class PublictagcloudAction extends Action
             $message .= _('Be the first to post one!');
         }
         else {
-            $message .= _('Why not [register an account](%%action.register%%) and be the first to post one!');
+            $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and be the first to post one!'),
+                                (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/register.php b/actions/register.php
index dcbbbdb6a..046a76b80 100644
--- a/actions/register.php
+++ b/actions/register.php
@@ -116,6 +116,8 @@ class RegisterAction extends Action
      *
      * Checks if registration is closed and shows an error if so.
      *
+     * Checks if only OpenID is allowed and redirects to openidlogin if so.
+     *
      * @param array $args $_REQUEST data
      *
      * @return void
@@ -127,6 +129,8 @@ class RegisterAction extends Action
 
         if (common_config('site', 'closed')) {
             $this->clientError(_('Registration not allowed.'));
+        } else if (common_config('site', 'openidonly')) {
+            common_redirect(common_local_url('openidlogin'));
         } else if (common_logged_in()) {
             $this->clientError(_('Already logged in.'));
         } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
diff --git a/actions/remotesubscribe.php b/actions/remotesubscribe.php
index e658f8d37..7323103fc 100644
--- a/actions/remotesubscribe.php
+++ b/actions/remotesubscribe.php
@@ -71,11 +71,13 @@ class RemotesubscribeAction extends Action
         if ($this->err) {
             $this->element('div', 'error', $this->err);
         } else {
-            $inst = _('To subscribe, you can [login](%%action.login%%),' .
-                      ' or [register](%%action.register%%) a new ' .
-                      ' account. If you already have an account ' .
-                      ' on a [compatible microblogging site](%%doc.openmublog%%), ' .
-                      ' enter your profile URL below.');
+            $inst = sprintf(_('To subscribe, you can [login](%%%%action.%s%%%%),' .
+                              ' or [register](%%%%action.%s%%%%) a new ' .
+                              ' account. If you already have an account ' .
+                              ' on a [compatible microblogging site](%%doc.openmublog%%), ' .
+                              ' enter your profile URL below.'),
+                            (!common_config('site','openidonly')) ? 'login' : 'openidlogin',
+                            (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
             $output = common_markup_to_html($inst);
             $this->elementStart('div', 'instructions');
             $this->raw($output);
diff --git a/actions/replies.php b/actions/replies.php
index d7ed440e9..f14383d33 100644
--- a/actions/replies.php
+++ b/actions/replies.php
@@ -187,7 +187,9 @@ class RepliesAction extends OwnerDesignAction
             }
         }
         else {
-            $message .= sprintf(_('Why not [register an account](%%%%action.register%%%%) and then nudge %s or post a notice to his or her attention.'), $this->user->nickname);
+            $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and then nudge %s or post a notice to his or her attention.'),
+                                (!common_config('site','openidonly')) ? 'register' : 'openidlogin',
+                                $this->user->nickname);
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/showfavorites.php b/actions/showfavorites.php
index 8b4926f01..9f549baf2 100644
--- a/actions/showfavorites.php
+++ b/actions/showfavorites.php
@@ -173,7 +173,9 @@ class ShowfavoritesAction extends OwnerDesignAction
             }
         }
         else {
-            $message = sprintf(_('%s hasn\'t added any notices to his favorites yet. Why not [register an account](%%%%action.register%%%%) and then post something interesting they would add to their favorites :)'), $this->user->nickname);
+            $message = sprintf(_('%s hasn\'t added any notices to his favorites yet. Why not [register an account](%%%%action.%s%%%%) and then post something interesting they would add to their favorites :)'),
+                               $this->user->nickname,
+                               (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/showgroup.php b/actions/showgroup.php
index 32ec674a9..4d8ba5fa8 100644
--- a/actions/showgroup.php
+++ b/actions/showgroup.php
@@ -440,8 +440,9 @@ class ShowgroupAction extends GroupDesignAction
             $m = sprintf(_('**%s** is a user group on %%%%site.name%%%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
                 'based on the Free Software [Laconica](http://laconi.ca/) tool. Its members share ' .
                 'short messages about their life and interests. '.
-                '[Join now](%%%%action.register%%%%) to become part of this group and many more! ([Read more](%%%%doc.help%%%%))'),
-                     $this->group->nickname);
+                '[Join now](%%%%action.%s%%%%) to become part of this group and many more! ([Read more](%%%%doc.help%%%%))'),
+                     $this->group->nickname,
+                     (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         } else {
             $m = sprintf(_('**%s** is a user group on %%%%site.name%%%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
                 'based on the Free Software [Laconica](http://laconi.ca/) tool. Its members share ' .
diff --git a/actions/showstream.php b/actions/showstream.php
index cd5d4bb70..3f603d64f 100644
--- a/actions/showstream.php
+++ b/actions/showstream.php
@@ -358,7 +358,9 @@ class ShowstreamAction extends ProfileAction
             }
         }
         else {
-            $message .= sprintf(_('Why not [register an account](%%%%action.register%%%%) and then nudge %s or post a notice to his or her attention.'), $this->user->nickname);
+            $message .= sprintf(_('Why not [register an account](%%%%action.%s%%%%) and then nudge %s or post a notice to his or her attention.'),
+                                (!common_config('site','openidonly')) ? 'register' : 'openidlogin',
+                                $this->user->nickname);
         }
 
         $this->elementStart('div', 'guide');
@@ -387,8 +389,10 @@ class ShowstreamAction extends ProfileAction
         if (!(common_config('site','closed') || common_config('site','inviteonly'))) {
             $m = sprintf(_('**%s** has an account on %%%%site.name%%%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
                  'based on the Free Software [Laconica](http://laconi.ca/) tool. ' .
-                 '[Join now](%%%%action.register%%%%) to follow **%s**\'s notices and many more! ([Read more](%%%%doc.help%%%%))'),
-                 $this->user->nickname, $this->user->nickname);
+                 '[Join now](%%%%action.%s%%%%) to follow **%s**\'s notices and many more! ([Read more](%%%%doc.help%%%%))'),
+                 $this->user->nickname,
+                 (!common_config('site','openidonly')) ? 'register' : 'openidlogin',
+                 $this->user->nickname);
         } else {
             $m = sprintf(_('**%s** has an account on %%%%site.name%%%%, a [micro-blogging](http://en.wikipedia.org/wiki/Micro-blogging) service ' .
                  'based on the Free Software [Laconica](http://laconi.ca/) tool. '),
diff --git a/actions/subscribers.php b/actions/subscribers.php
index 66ac00fb1..404738012 100644
--- a/actions/subscribers.php
+++ b/actions/subscribers.php
@@ -111,7 +111,9 @@ class SubscribersAction extends GalleryAction
             }
         }
         else {
-            $message = sprintf(_('%s has no subscribers. Why not [register an account](%%%%action.register%%%%) and be the first?'), $this->user->nickname);
+            $message = sprintf(_('%s has no subscribers. Why not [register an account](%%%%action.%s%%%%) and be the first?'),
+                               $this->user->nickname,
+                               (!common_config('site','openidonly')) ? 'register' : 'openidlogin');
         }
 
         $this->elementStart('div', 'guide');
diff --git a/actions/userauthorization.php b/actions/userauthorization.php
index 00903ae01..7e397e888 100644
--- a/actions/userauthorization.php
+++ b/actions/userauthorization.php
@@ -47,7 +47,11 @@ class UserauthorizationAction extends Action
                 # Go log in, and then come back
                 common_set_returnto($_SERVER['REQUEST_URI']);
 
-                common_redirect(common_local_url('login'));
+                if (!common_config('site', 'openidonly')) {
+                    common_redirect(common_local_url('login'));
+                } else {
+                    common_redirect(common_local_url('openidlogin'));
+                }
                 return;
             }
 
diff --git a/config.php.sample b/config.php.sample
index 21b6865e1..42d42cf86 100644
--- a/config.php.sample
+++ b/config.php.sample
@@ -38,6 +38,8 @@ $config['site']['path'] = 'laconica';
 // $config['site']['closed'] = true;
 // Only allow registration for people invited by another user
 // $config['site']['inviteonly'] = true;
+// Only allow registrations and logins through OpenID
+// $config['site']['openidonly'] = true;
 // Make the site invisible to  non-logged-in users
 // $config['site']['private'] = true;
 
diff --git a/index.php b/index.php
index 2e74d38fb..980b9881b 100644
--- a/index.php
+++ b/index.php
@@ -182,12 +182,20 @@ function main()
     // If the site is private, and they're not on one of the "public"
     // parts of the site, redirect to login
 
-    if (!$user && common_config('site', 'private') &&
-        !in_array($action, array('login', 'openidlogin', 'finishopenidlogin',
-                                 'recoverpassword', 'api', 'doc', 'register')) &&
-        !preg_match('/rss$/', $action)) {
-        common_redirect(common_local_url('login'));
-        return;
+    if (!$user && common_config('site', 'private')) {
+        $public_actions = array('openidlogin', 'finishopenidlogin',
+                                'recoverpassword', 'api', 'doc');
+        $login_action = 'openidlogin';
+        if (!common_config('site', 'openidonly')) {
+            $public_actions[] = 'login';
+            $public_actions[] = 'register';
+            $login_action = 'login';
+        }
+        if (!in_array($action, $public_actions) &&
+            !preg_match('/rss$/', $action)) {
+            common_redirect(common_local_url($login_action));
+            return;
+        }
     }
 
     $action_class = ucfirst($action).'Action';
diff --git a/lib/action.php b/lib/action.php
index 326edf3a0..6da9adab5 100644
--- a/lib/action.php
+++ b/lib/action.php
@@ -436,12 +436,17 @@ class Action extends HTMLOutputter // lawsuit
                                 _('Logout'), _('Logout from the site'), false, 'nav_logout');
             }
             else {
-                if (!common_config('site', 'closed')) {
-                    $this->menuItem(common_local_url('register'),
-                                    _('Register'), _('Create an account'), false, 'nav_register');
+                if (!common_config('site', 'openidonly')) {
+                    if (!common_config('site', 'closed')) {
+                        $this->menuItem(common_local_url('register'),
+                                        _('Register'), _('Create an account'), false, 'nav_register');
+                    }
+                    $this->menuItem(common_local_url('login'),
+                                    _('Login'), _('Login to the site'), false, 'nav_login');
+                } else {
+                    $this->menuItem(common_local_url('openidlogin'),
+                                    _('OpenID'), _('Login with OpenID'), false, 'nav_openid');
                 }
-                $this->menuItem(common_local_url('login'),
-                                _('Login'), _('Login to the site'), false, 'nav_login');
             }
             $this->menuItem(common_local_url('doc', array('title' => 'help')),
                             _('Help'), _('Help me!'), false, 'nav_help');
diff --git a/lib/common.php b/lib/common.php
index be30519f4..bf078378d 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -109,6 +109,7 @@ $config =
               'broughtbyurl' => null,
               'closed' => false,
               'inviteonly' => false,
+              'openidonly' => false,
               'private' => false,
               'ssl' => 'never',
               'sslserver' => null,
diff --git a/lib/facebookaction.php b/lib/facebookaction.php
index ab11b613e..289e702c6 100644
--- a/lib/facebookaction.php
+++ b/lib/facebookaction.php
@@ -256,8 +256,13 @@ class FacebookAction extends Action
         $this->elementStart('dd');
         $this->elementStart('p');
         $this->text(sprintf($loginmsg_part1, common_config('site', 'name')));
-        $this->element('a',
-            array('href' => common_local_url('register')), _('Register'));
+        if (!common_config('site', 'openidonly')) {
+            $this->element('a',
+                array('href' => common_local_url('register')), _('Register'));
+        } else {
+            $this->element('a',
+                array('href' => common_local_url('openidlogin')), _('Register'));
+        }
         $this->text($loginmsg_part2);
     $this->elementEnd('p');
         $this->elementEnd('dd');
diff --git a/lib/logingroupnav.php b/lib/logingroupnav.php
index f23985f3a..919fd3db9 100644
--- a/lib/logingroupnav.php
+++ b/lib/logingroupnav.php
@@ -72,11 +72,13 @@ class LoginGroupNav extends Widget
         // action => array('prompt', 'title')
         $menu = array();
 
-        $menu['login'] = array(_('Login'),
-                         _('Login with a username and password'));
-        if (!(common_config('site','closed') || common_config('site','inviteonly'))) {
-            $menu['register'] = array(_('Register'),
-                                _('Sign up for a new account'));
+        if (!common_config('site','openidonly')) {
+            $menu['login'] = array(_('Login'),
+                             _('Login with a username and password'));
+            if (!(common_config('site','closed') || common_config('site','inviteonly'))) {
+                $menu['register'] = array(_('Register'),
+                                    _('Sign up for a new account'));
+            }
         }
         $menu['openidlogin'] = array(_('OpenID'),
                                _('Login or register with OpenID'));