An action to delete your own account

The new DeleteaccountAction lets a user delete their own account
(subject to global rights set by the admin). It presents a form to
delete the account, with an "I am sure." text entry box.

It then schedules the account for deletion and logs the user out.

2 files changed, 328 insertions, 0 deletions

diff --git a/actions/deleteaccount.php b/actions/deleteaccount.php
new file mode 100644
index 000000000..c7dfa570c
--- /dev/null
+++ b/actions/deleteaccount.php
@@ -0,0 +1,319 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * Delete your own account
+ * 
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Account
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    // This check helps protect against security problems;
+    // your code file can't be executed directly from the web.
+    exit(1);
+}
+
+/**
+ * Action to delete your own account
+ * 
+ * Note that this is distinct from DeleteuserAction, which see. I thought
+ * that making that action do both things (delete another user and delete the
+ * current user) would open a lot of holes. I'm open to refactoring, however.
+ *
+ * @category  Account
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+class DeleteaccountAction extends Action
+{
+    private $_complete = false;
+    private $_error    = null;
+
+    /**
+     * For initializing members of the class.
+     *
+     * @param array $argarray misc. arguments
+     *
+     * @return boolean true
+     */
+
+    function prepare($argarray)
+    {
+        parent::prepare($argarray);
+        
+        $cur = common_current_user();
+
+        if (empty($cur)) {
+            throw new ClientException(_("Only logged-in users ".
+                                        "can delete their account."), 403);
+        }
+
+        if (!$cur->hasRight(Right::DELETEACCOUNT)) {
+            throw new ClientException(_("You cannot delete your account."), 403);
+        }
+
+        return true;
+    }
+
+    /**
+     * Handler method
+     *
+     * @param array $argarray is ignored since it's now passed in in prepare()
+     *
+     * @return void
+     */
+
+    function handle($argarray=null)
+    {
+        parent::handle($argarray);
+
+        if ($this->isPost()) {
+            $this->deleteAccount();
+        } else {
+            $this->showPage();
+        }
+        return;
+    }
+
+    /**
+     * Return true if read only.
+     *
+     * MAY override
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean is read only action?
+     */
+
+    function isReadOnly($args)
+    {
+        return false;
+    }
+
+    /**
+     * Return last modified, if applicable.
+     *
+     * MAY override
+     *
+     * @return string last modified http header
+     */
+
+    function lastModified()
+    {
+        // For comparison with If-Last-Modified
+        // If not applicable, return null
+        return null;
+    }
+
+    /**
+     * Return etag, if applicable.
+     *
+     * MAY override
+     *
+     * @return string etag http header
+     */
+
+    function etag()
+    {
+        return null;
+    }
+
+    /**
+     * Delete the current user's account
+     * 
+     * Checks for the "I am sure." string to make sure the user really
+     * wants to delete their account.
+     *
+     * Then, marks the account as deleted and begins the deletion process
+     * (actually done by a back-end handler).
+     *
+     * If successful it logs the user out, and shows a brief completion message.
+     *
+     * @return void
+     */
+
+    function deleteAccount()
+    {
+        $this->checkSessionToken();
+
+        if ($this->trimmed('iamsure') != _('I am sure.')) {
+            $this->_error = _('You must write  "I am sure." exactly in the box.');
+            $this->showPage();
+            return;
+        }
+
+        $cur = common_current_user();
+
+        // Mark the account as deleted and shove low-level deletion tasks
+        // to background queues. Removing a lot of posts can take a while...
+
+        if (!$cur->hasRole(Profile_role::DELETED)) {
+            $cur->grantRole(Profile_role::DELETED);
+        }
+
+        $qm = QueueManager::get();
+        $qm->enqueue($cur, 'deluser');
+
+        // The user is really-truly logged out
+
+        common_set_user(null);
+        common_real_login(false); // not logged in
+        common_forgetme(); // don't log back in!
+
+        $this->_complete = true;
+        $this->showPage();
+    }
+
+    /**
+     * Shows the page content.
+     * 
+     * If the deletion is complete, just shows a completion message.
+     *
+     * Otherwise, shows the deletion form.
+     *
+     * @return void
+     *
+     */
+
+    function showContent()
+    {
+        if ($this->_complete) {
+            $this->element('p', 'confirmation', 
+                           _('Account deleted.'));
+            return;
+        }
+
+        if (!empty($this->_error)) {
+            $this->element('p', 'error', $this->_error);
+            $this->_error = null;
+        }
+
+        $form = new DeleteAccountForm($this);
+        $form->show();
+    }
+    
+    /**
+     * Show the title of the page
+     *
+     * @return string title
+     */
+
+    function title()
+    {
+        return _('Delete account');
+    }
+}
+
+/**
+ * Form for deleting your account
+ * 
+ * Note that this mostly is here to keep you from accidentally deleting your
+ * account.
+ *
+ * @category  Account
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+class DeleteAccountForm extends Form
+{
+    /**
+     * Class of the form.
+     *
+     * @return string the form's class
+     */
+
+    function formClass()
+    {
+        return 'form_profile_delete';
+    }
+
+    /**
+     * URL the form posts to
+     *
+     * @return string the form's action URL
+     */
+
+    function action()
+    {
+        return common_local_url('deleteaccount');
+    }
+
+    /**
+     * Output form data
+     * 
+     * Instructions plus an 'i am sure' entry box.
+     *
+     * @return void
+     */
+
+    function formData()
+    {
+        $cur = common_current_user();
+
+        $msg = _('<p>This will <strong>permanently delete</strong> '.
+                 'your account data from this server. </p>');
+
+        if ($cur->hasRight(Right::BACKUPACCOUNT)) {
+            $msg .= sprintf(_('<p>You are strongly advised to '.
+                              '<a href="%s">back up your data</a>'
+                              ' before deletion.</p>'),
+                           common_local_url('backupaccount'));
+        }
+
+        $this->out->elementStart('p');
+        $this->out->raw($msg);
+        $this->out->elementEnd('p');
+
+        $this->out->input('iamsure',
+                          _('Confirm'),
+                          null,
+                          _('Enter "I am sure." to confirm that '.
+                            'you want to delete your account.'));
+    }
+
+    /**
+     * Buttons for the form
+     * 
+     * In this case, a single submit button
+     *
+     * @return void
+     */
+
+    function formActions()
+    {
+        $this->out->submit('submit',
+                           _m('BUTTON', 'Delete'),
+                           'submit',
+                           null,
+                           _('Permanently your account'));
+    }
+}
diff --git a/actions/profilesettings.php b/actions/profilesettings.php
index 4890a575b..0226e1dd4 100644
--- a/actions/profilesettings.php
+++ b/actions/profilesettings.php
@@ -459,9 +459,18 @@ class ProfilesettingsAction extends AccountSettingsAction
         $this->elementStart('div', array('id' => 'aside_primary',
                                          'class' => 'aside'));
         if ($user->hasRight(Right::BACKUPACCOUNT)) {
+            $this->elementStart('li');
             $this->element('a',
                            array('href' => common_local_url('backupaccount')),
                            _('Backup account'));
+            $this->elementEnd('li');
+        }
+        if ($user->hasRight(Right::DELETEACCOUNT)) {
+            $this->elementStart('li');
+            $this->element('a',
+                           array('href' => common_local_url('deleteaccount')),
+                           _('Delete account'));
+            $this->elementEnd('li');
         }
         $this->elementEnd('div');
     }