Can provide an alternate page for the login form.

The page must contain a form with an action field set to /login/index.php
and return fields username and password

TODO
It may be worth checking the URL when it's entered at admin/auth.php
to ensure it is at least pointing to a valid page as an incorrect URL
could potentially lock all users out of a site.

admin/auth.php

@@ -61,6 +61,9 @@
     if (! isset($config->guestloginbutton)) {
         $config->guestloginbutton = 1;
     }
+    if (! isset($config->alternateloginurl)) {
+        $config->alternateloginurl = '';
+    }
     if (! isset($config->auth_instructions)) {
         $config->auth_instructions = "";
     }
@@ -160,6 +163,22 @@
         echo "</td></tr>";
     }
 
+
+/// An alternate url for the login form. It means we can use login forms that are integrated
+/// into non-moodle pages
+    echo '<tr valign="top">';
+    echo '<td algin="right" nowrap="nowrap">';
+    print_string('alternateloginurl', 'auth');
+    echo '</td>';
+    echo '<td>';
+    echo '<input type="text" size="40" name="alternateloginurl" alt="'.get_string('alternateloginurl', 'auth').'" value="'.$config->alternateloginurl.'" />';
+    echo '</td>';
+    echo '<td>';
+    print_string('alternatelogin', 'auth', htmlspecialchars($CFG->wwwroot.'/login/index.php'));
+    echo '</td>';
+    echo '</tr>';
+
+
     echo '</table>';
     echo '<p align="center"><input type="submit" value="'.get_string('savechanges').'"></p>';
     echo '</form>';

lang/en/auth.php

@@ -2,6 +2,8 @@
       // auth.php - created with Moodle 1.5 UNSTABLE DEVELOPMENT (2005010100)
 
 
+$string['alternatelogin'] = 'If you enter a URL here, it will be used as the login page for this site. The page should contain a form which has the action property set to <strong>\'$a\'</strong> and return fields <strong>username</strong> and <strong>password</strong>.<br />Be careful not to enter an incorrect URL as you may lock yourself out of this site.<br />Leave this setting blank to use the default login page.';
+$string['alternateloginurl'] = 'Alternate Login URL';
 $string['auth_cas_logincas'] = 'Secure connection access';
 $string['auth_cas_invalidcaslogin'] = 'Sorry, your login has failed - you could not be authorised';
 $string['auth_cas_server_settings'] = 'CAS server configuration';

lib/defaults.php

@@ -10,6 +10,7 @@
        'allowuserthemes'          =>  false,
        'allowuserblockhiding'     =>  true,
        'allusersaresitestudents'  =>  true,
+       'alternateloginurl'        => '',
        'aspellpath'               => '',
        'auth'                     => 'email',
        'auth_pop3mailbox'         => 'INBOX',

login/index.php

@@ -61,10 +61,10 @@
         if ($user) {
         	$frm->username = $user->username;
         } else {
-            $frm = data_submitted();
+            $frm = data_submitted($CFG->alternateloginurl);
         }
     } else {
-        $frm = data_submitted();
+        $frm = data_submitted($CFG->alternateloginurl);
     }
 
     if ($frm and (get_moodle_cookie() == '')) {    // Login without cookie
@@ -219,6 +219,11 @@
         $show_instructions = false;
     }
 
+    if (!empty($CFG->alternateloginurl)) {
+        redirect($CFG->alternateloginurl);
+        exit;
+    }
+    
     print_header("$site->fullname: $loginsite", "$site->fullname", $loginsite, $focus, "", true, "<div align=\"right\">$langmenu</div>"); 
     include("index_form.html");
     print_footer();