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<?php | |
/** | |
* @file | |
* Contains administrative screens for the access control plugins. | |
* | |
* Access control can be implemented by creating a list of 0 or more access | |
* plugins, each with settings. This list can be ANDed together or ORed | |
* together. When testing access, each plugin is tested until success | |
* or failure can be determined. We use short circuiting techniques to | |
* ensure we are as efficient as possible. | |
* | |
* Access plugins are part of the context system, and as such can require | |
* contexts to work. That allows the use of access based upon visibility | |
* of an object, or even more esoteric things such as node type, node language | |
* etc. Since a lot of access depends on the logged in user, the logged in | |
* user should always be provided as a context. | |
* | |
* In the UI, the user is presented with a table and a 'add access method' select. | |
* When added, the user will be presented with the config wizard and, when | |
* confirmed, table will be refreshed via AJAX to show the new access method. | |
* Each item in the table will have controls to change the settings or remove | |
* the item. Changing the settings will invoke the modal for update. | |
* | |
* Currently the modal is not degradable, but it could be with only a small | |
* amount of work. | |
* | |
* A simple radio | |
* control is used to let the user pick the and/or logic. | |
* | |
* Access control is stored in an array: | |
* @code | |
* array( | |
* 'plugins' => array( | |
* 0 => array( | |
* 'name' => 'name of access plugin', | |
* 'settings' => array(), // These will be set by the form | |
* ), | |
* // ... as many as needed | |
* ), | |
* 'logic' => 'AND', // or 'OR', | |
* ), | |
* @endcode | |
* | |
* To add this widget to your UI, you need to do a little bit of setup. | |
* | |
* The form will utilize two callbacks, one to get the cached version | |
* of the access settings, and one to store the cached version of the | |
* access settings. These will be used from AJAX forms, so they will | |
* be completely out of the context of this page load and will not have | |
* knowledge of anything sent to this form (the 'module' and 'argument' | |
* will be preserved through the URL only). | |
* | |
* The 'module' is used to determine the location of the callback. It | |
* does not strictly need to be a module, so that if your module defines | |
* multiple systems that use this callback, it can use anything within the | |
* module's namespace it likes. | |
* | |
* When retrieving the cache, the cache may not have already been set up; | |
* In order to efficiently use cache space, we want to cache the stored | |
* settings *only* when they have changed. Therefore, the get access cache | |
* callback should first look for cache, and if it finds nothing, return | |
* the original settings. | |
* | |
* The callbacks: | |
* - $module . _ctools_access_get($argument) -- get the 'access' settings | |
* from cache. Must return array($access, $contexts); This callback can | |
* perform access checking to make sure this URL is not being gamed. | |
* - $module . _ctools_access_set($argument, $access) -- set the 'access' | |
* settings in cache. | |
* - $module . _ctools_access_clear($argument) -- clear the cache. | |
* | |
* The ctools_object_cache is recommended for this purpose, but you can use | |
* any caching mechanism you like. An example: | |
* | |
* @code{ | |
* ctools_include('object-cache'); | |
* ctools_object_cache_set("$module:argument", $access); | |
* } | |
* | |
* To utilize this form: | |
* @code | |
* ctools_include('context-access-admin'); | |
* $form_state = array( | |
* 'access' => $access, | |
* 'module' => 'module name', | |
* 'callback argument' => 'some string', | |
* 'contexts' => $contexts, // an array of contexts. Optional if no contexts. | |
* // 'logged-in-user' will be added if not present as the access system | |
* // requires this context. | |
* ), | |
* $output = drupal_build_form('ctools_access_admin_form', $form_state); | |
* if (!empty($form_state['executed'])) { | |
* // save $form_state['access'] however you like. | |
* } | |
* @endcode | |
* | |
* Additionally, you may add 'no buttons' => TRUE if you wish to embed this | |
* form into your own, and instead call | |
* | |
* @code{ | |
* $form = ctools_access_admin_form($form, $form_state); | |
* } | |
* | |
* You'll be responsible for adding a submit button. | |
* | |
* You may use ctools_access($access, $contexts) which will return | |
* TRUE if access is passed or FALSE if access is not passed. | |
*/ | |
/** | |
* Administrative form for access control. | |
*/ | |
function ctools_access_admin_form($form, &$form_state) { | |
ctools_include('context'); | |
$argument = isset($form_state['callback argument']) ? $form_state['callback argument'] : ''; | |
$fragment = $form_state['module']; | |
if ($argument) { | |
$fragment .= '-' . $argument; | |
} | |
$contexts = isset($form_state['contexts']) ? $form_state['contexts'] : array(); | |
$form['access_table'] = array( | |
'#markup' => ctools_access_admin_render_table($form_state['access'], $fragment, $contexts), | |
); | |
$form['add-button'] = array( | |
'#theme' => 'ctools_access_admin_add', | |
); | |
// This sets up the URL for the add access modal. | |
$form['add-button']['add-url'] = array( | |
'#attributes' => array('class' => array("ctools-access-add-url")), | |
'#type' => 'hidden', | |
'#value' => url("ctools/context/ajax/access/add/$fragment", array('absolute' => TRUE)), | |
); | |
$plugins = ctools_get_relevant_access_plugins($contexts); | |
$options = array(); | |
foreach ($plugins as $id => $plugin) { | |
$options[$id] = $plugin['title']; | |
} | |
asort($options); | |
$form['add-button']['type'] = array( | |
// This ensures that the form item is added to the URL. | |
'#attributes' => array('class' => array("ctools-access-add-url")), | |
'#type' => 'select', | |
'#options' => $options, | |
'#required' => FALSE, | |
); | |
$form['add-button']['add'] = array( | |
'#type' => 'submit', | |
'#attributes' => array('class' => array('ctools-use-modal')), | |
'#id' => "ctools-access-add", | |
'#value' => t('Add'), | |
); | |
$form['logic'] = array( | |
'#type' => 'radios', | |
'#options' => array( | |
'and' => t('All criteria must pass.'), | |
'or' => t('Only one criteria must pass.'), | |
), | |
'#default_value' => isset($form_state['access']['logic']) ? $form_state['access']['logic'] : 'and', | |
); | |
if (empty($form_state['no buttons'])) { | |
$form['buttons']['save'] = array( | |
'#type' => 'submit', | |
'#value' => t('Save'), | |
'#submit' => array('ctools_access_admin_form_submit'), | |
); | |
} | |
return $form; | |
} | |
/** | |
* Render the table. This is used both to render it initially and to rerender | |
* it upon ajax response. | |
*/ | |
function ctools_access_admin_render_table($access, $fragment, $contexts) { | |
ctools_include('ajax'); | |
ctools_include('modal'); | |
$rows = array(); | |
if (empty($access['plugins'])) { | |
$access['plugins'] = array(); | |
} | |
foreach ($access['plugins'] as $id => $test) { | |
$row = array(); | |
$plugin = ctools_get_access_plugin($test['name']); | |
$title = isset($plugin['title']) ? $plugin['title'] : t('Broken/missing access plugin %plugin', array('%plugin' => $test['name'])); | |
$row[] = array('data' => $title, 'class' => array('ctools-access-title')); | |
$description = ctools_access_summary($plugin, $contexts, $test); | |
$row[] = array('data' => $description, 'class' => array('ctools-access-description')); | |
$operations = ctools_modal_image_button(ctools_image_path('icon-configure.png'), "ctools/context/ajax/access/configure/$fragment/$id", t('Configure settings for this item.')); | |
$operations .= ctools_ajax_image_button(ctools_image_path('icon-delete.png'), "ctools/context/ajax/access/delete/$fragment/$id", t('Remove this item.')); | |
$row[] = array('data' => $operations, 'class' => array('ctools-access-operations'), 'align' => 'right'); | |
$rows[] = $row; | |
} | |
$header = array( | |
array('data' => t('Title'), 'class' => array('ctools-access-title')), | |
array('data' => t('Description'), 'class' => array('ctools-access-description')), | |
array('data' => '', 'class' => array('ctools-access-operations'), 'align' => 'right'), | |
); | |
if (empty($rows)) { | |
$rows[] = array(array('data' => t('No criteria selected, this test will pass.'), 'colspan' => count($header))); | |
} | |
ctools_modal_add_js(); | |
return theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'ctools-access-table'))); | |
} | |
/** | |
* Theme the 'add' portion of the access form into a table. | |
*/ | |
function theme_ctools_access_admin_add($vars) { | |
$rows = array(array(drupal_render_children($vars['form']))); | |
$output = '<div class="container-inline">'; | |
$output .= theme('table', array('rows' => $rows)); | |
$output .= '</div>'; | |
return $output; | |
} | |
function ctools_access_admin_form_submit($form, &$form_state) { | |
$form_state['access']['logic'] = $form_state['values']['logic']; | |
$function = $form_state['module'] . '_ctools_access_clear'; | |
if (function_exists($function)) { | |
$function($form_state['callback argument']); | |
} | |
} | |
// -------------------------------------------------------------------------- | |
// AJAX menu entry points. | |
/** | |
* AJAX callback to add a new access test to the list. | |
*/ | |
function ctools_access_ajax_add($fragment = NULL, $name = NULL) { | |
ctools_include('ajax'); | |
ctools_include('modal'); | |
ctools_include('context'); | |
if (empty($fragment) || empty($name)) { | |
ctools_ajax_render_error(); | |
} | |
$plugin = ctools_get_access_plugin($name); | |
if (empty($plugin)) { | |
ctools_ajax_render_error(); | |
} | |
// Separate the fragment into 'module' and 'argument' | |
if (strpos($fragment, '-') === FALSE) { | |
$module = $fragment; | |
$argument = NULL; | |
} | |
else { | |
list($module, $argument) = explode('-', $fragment, 2); | |
} | |
$function = $module . '_ctools_access_get'; | |
if (!function_exists($function)) { | |
ctools_ajax_render_error(t('Missing callback hooks.')); | |
} | |
list($access, $contexts) = $function($argument); | |
// Make sure we have the logged in user context | |
if (!isset($contexts['logged-in-user'])) { | |
$contexts['logged-in-user'] = ctools_access_get_loggedin_context(); | |
} | |
if (empty($access['plugins'])) { | |
$access['plugins'] = array(); | |
} | |
$test = ctools_access_new_test($plugin); | |
$id = $access['plugins'] ? max(array_keys($access['plugins'])) + 1 : 0; | |
$access['plugins'][$id] = $test; | |
$form_state = array( | |
'plugin' => $plugin, | |
'id' => $id, | |
'test' => &$access['plugins'][$id], | |
'access' => &$access, | |
'contexts' => $contexts, | |
'title' => t('Add criteria'), | |
'ajax' => TRUE, | |
'modal' => TRUE, | |
'modal return' => TRUE, | |
); | |
$output = ctools_modal_form_wrapper('ctools_access_ajax_edit_item', $form_state); | |
if (!isset($output[0])) { | |
$function = $module . '_ctools_access_set'; | |
if (function_exists($function)) { | |
$function($argument, $access); | |
} | |
$table = ctools_access_admin_render_table($access, $fragment, $contexts); | |
$output = array(); | |
$output[] = ajax_command_replace('table#ctools-access-table', $table); | |
$output[] = ctools_modal_command_dismiss(); | |
} | |
print ajax_render($output); | |
} | |
/** | |
* AJAX callback to edit an access test in the list. | |
*/ | |
function ctools_access_ajax_edit($fragment = NULL, $id = NULL) { | |
ctools_include('ajax'); | |
ctools_include('modal'); | |
ctools_include('context'); | |
if (empty($fragment) || !isset($id)) { | |
ctools_ajax_render_error(); | |
} | |
// Separate the fragment into 'module' and 'argument' | |
if (strpos($fragment, '-') === FALSE) { | |
$module = $fragment; | |
$argument = NULL; | |
} | |
else { | |
list($module, $argument) = explode('-', $fragment, 2); | |
} | |
$function = $module . '_ctools_access_get'; | |
if (!function_exists($function)) { | |
ctools_ajax_render_error(t('Missing callback hooks.')); | |
} | |
list($access, $contexts) = $function($argument); | |
if (empty($access['plugins'][$id])) { | |
ctools_ajax_render_error(); | |
} | |
// Make sure we have the logged in user context | |
if (!isset($contexts['logged-in-user'])) { | |
$contexts['logged-in-user'] = ctools_access_get_loggedin_context(); | |
} | |
$plugin = ctools_get_access_plugin($access['plugins'][$id]['name']); | |
$form_state = array( | |
'plugin' => $plugin, | |
'id' => $id, | |
'test' => &$access['plugins'][$id], | |
'access' => &$access, | |
'contexts' => $contexts, | |
'title' => t('Edit criteria'), | |
'ajax' => TRUE, | |
'ajax' => TRUE, | |
'modal' => TRUE, | |
'modal return' => TRUE, | |
); | |
$output = ctools_modal_form_wrapper('ctools_access_ajax_edit_item', $form_state); | |
if (!isset($output[0])) { | |
$function = $module . '_ctools_access_set'; | |
if (function_exists($function)) { | |
$function($argument, $access); | |
} | |
$table = ctools_access_admin_render_table($access, $fragment, $contexts); | |
$output = array(); | |
$output[] = ajax_command_replace('table#ctools-access-table', $table); | |
$output[] = ctools_modal_command_dismiss(); | |
} | |
print ajax_render($output); | |
} | |
/** | |
* Form to edit the settings of an access test. | |
*/ | |
function ctools_access_ajax_edit_item($form, &$form_state) { | |
$test = &$form_state['test']; | |
$plugin = &$form_state['plugin']; | |
if (isset($plugin['required context'])) { | |
$form['context'] = ctools_context_selector($form_state['contexts'], $plugin['required context'], $test['context']); | |
} | |
$form['settings'] = array('#tree' => TRUE); | |
if ($function = ctools_plugin_get_function($plugin, 'settings form')) { | |
$form = $function($form, $form_state, $test['settings']); | |
} | |
$form['not'] = array( | |
'#type' => 'checkbox', | |
'#title' => t('Reverse (NOT)'), | |
'#default_value' => !empty($test['not']), | |
); | |
$form['save'] = array( | |
'#type' => 'submit', | |
'#value' => t('Save'), | |
); | |
return $form; | |
} | |
/** | |
* Validate handler for argument settings. | |
*/ | |
function ctools_access_ajax_edit_item_validate($form, &$form_state) { | |
if ($function = ctools_plugin_get_function($form_state['plugin'], 'settings form validate')) { | |
$function($form, $form_state); | |
} | |
} | |
/** | |
* Submit handler for argument settings. | |
*/ | |
function ctools_access_ajax_edit_item_submit($form, &$form_state) { | |
if ($function = ctools_plugin_get_function($form_state['plugin'], 'settings form submit')) { | |
$function($form, $form_state); | |
} | |
$form_state['test']['settings'] = $form_state['values']['settings']; | |
if (isset($form_state['values']['context'])) { | |
$form_state['test']['context'] = $form_state['values']['context']; | |
} | |
$form_state['test']['not'] = !empty($form_state['values']['not']); | |
} | |
/** | |
* AJAX command to remove an access control item. | |
*/ | |
function ctools_access_ajax_delete($fragment = NULL, $id = NULL) { | |
ctools_include('ajax'); | |
ctools_include('modal'); | |
ctools_include('context'); | |
if (empty($fragment) || !isset($id)) { | |
ajax_render_error(); | |
} | |
// Separate the fragment into 'module' and 'argument' | |
if (strpos($fragment, '-') === FALSE) { | |
$module = $fragment; | |
$argument = NULL; | |
} | |
else { | |
list($module, $argument) = explode('-', $fragment, 2); | |
} | |
$function = $module . '_ctools_access_get'; | |
if (!function_exists($function)) { | |
ajax_render_error(t('Missing callback hooks.')); | |
} | |
list($access, $contexts) = $function($argument); | |
if (isset($access['plugins'][$id])) { | |
unset($access['plugins'][$id]); | |
} | |
// re-cache | |
$function = $module . '_ctools_access_set'; | |
if (function_exists($function)) { | |
$function($argument, $access); | |
} | |
$table = ctools_access_admin_render_table($access, $fragment, $contexts); | |
$output = array(); | |
$output[] = ajax_command_replace('table#ctools-access-table', $table); | |
print ajax_render($output); | |
} |