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<?php
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// $Id: contentblocker.module,v 1.15 2008/04/24 18:40:27 nedjo Exp $
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/**
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* Implementation of hook_boot().
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*/
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function contentblocker_init() {
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contentblocker_load_modules();
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}
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/**
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* Implementation of hook_help().
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*/
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function contentblocker_help($path, $arg) {
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switch ($path) {
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case 'admin/settings/contentblocker':
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return t('To enable users to filter or block content, visit the access control page after selecting which modules to enable filtering for.');
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}
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if (strpos($path, 'contentblocker/') === 0) {
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return t('Here is a list of the content filters you have registered.');
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}
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}
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/**
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* Implementation of hook_menu().
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*/
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function contentblocker_menu() {
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$items = array();
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// Add a settings menu item.
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$items['admin/settings/contentblocker'] = array(
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'title' => 'Content blocker',
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'description' => 'Select which data types to offer for blocking.',
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'access arguments' => array('administer site configuration'),
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'type' => MENU_NORMAL_ITEM,
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'page callback' => 'drupal_get_form',
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'page arguments' => array('contentblocker_settings_form'),
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);
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$types = contentblocker_get_data();
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if (!empty($types)) {
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$items['contentblocker'] = array(
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'title' => 'Content blocker',
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'description' => 'Administer content filters',
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'type' => MENU_NORMAL_ITEM,
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'access arguments' => TRUE,
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'position' => 'right',
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'weight' => -5,
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'page callback' => 'system_admin_menu_block_page',
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);
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foreach ($types as $type => $data) {
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if (!isset($data['save_type'])) {
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// Add a settings menu item.
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$items['contentblocker/'. $type] = array(
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'title' => filter_xss_admin($data['type_title']),
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'description' => 'Administer @type filters', array('@type' => $data['type_title']),
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'type' => MENU_NORMAL_ITEM,
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'access arguments' => TRUE,
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'page callback' => 'drupal_get_form',
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'page arguments' => array('contentblocker_admin', $type),
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);
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}
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}
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}
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}
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/**
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* Implementation of hook_theme().
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*/
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function contentblocker_theme() {
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return array(
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'contentblocker_admin' => array(
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'file' => 'contentblocker.module',
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'arguments' => array(
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'form' => NULL,
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),
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),
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);
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}
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/**
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* Settings form.
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*
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* Select components to share with the hub site.
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*/
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function contentblocker_settings_form() {
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$form = array();
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// Scan for available modules.
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$options = array();
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$path = drupal_get_path('module', 'contentblocker') .'/modules';
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$files = file_scan_directory($path, '\.inc$');
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foreach ($files as $file) {
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// The system module is a special case. It will be used in all cases.
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if (module_exists($file->name)) {
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// Grab the .info file and set name.
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$options[$file->name] = _contentblocker_get_module_name($file->name);
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}
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}
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$form['contentblocker_modules'] = array(
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'#type' => 'checkboxes',
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'#options' => $options,
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'#default_value' => variable_get('contentblocker_modules', array()),
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'#title' => t('Enabled filters'),
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'#description' => t('Select the types of filters you wish to enable.'),
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);
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return system_settings_form($form);
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}
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/**
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* Implementation of hook_perm().
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*/
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function contentblocker_perm() {
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$modules = contentblocker_load_modules();
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foreach ($modules as $module) {
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$perms[] = _contentblocker_get_perm($module);
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}
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return $perms;
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}
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/**
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* Return the permission to block content for a given module.
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*/
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function _contentblocker_get_perm($module) {
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return 'block content by '. $module;
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}
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/**
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* Implementation of hook_nodeapi().
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*
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* Load and save contentblocker properties on nodes.
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*/
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function contentblocker_nodeapi($node, $op, $arg = 0) {
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return contentblocker_object_api('node', $node, $op);
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}
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/**
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* Implementation of hook_comment().
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*
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* Load and save contentblocker properties on comments.
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*/
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function contentblocker_comment($comment, $op) {
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return contentblocker_object_api('comment', $comment, $op);
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}
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/**
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* Cross-object-type API functions.
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*
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* Load and save contentblocker properties on objects.
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*/
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function contentblocker_object_api($object_type, $object, $op) {
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global $user;
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// Only block content for logged in users.
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if ($user->uid) {
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switch ($op) {
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case 'load':
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$properties = array();
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$types = contentblocker_get_block_types();
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if (!empty($types)) {
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foreach ($types as $type) {
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$properties['contentblocker_'. $type] = $properties['contentblocker_original_'. $type] = contentblocker_has_block($type, (object) $object);
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}
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}
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return $properties;
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// We don't need an insert, because it's not possible to block on object creation.
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case 'update':
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// E.g. commments are received as an array.
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$object = (object) $object;
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$types = contentblocker_get_block_types();
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if (!empty($types)) {
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foreach ($types as $type) {
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$type_key = 'contentblocker_'. $type;
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$original_type_key = 'contentblocker_original_'. $type;
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if (isset($object->$type_key) && isset($object->$original_type_key) && $object->$type_key != $object->$original_type_key) {
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contentblocker_save_block($type, $object);
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}
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}
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}
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break;
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}
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}
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}
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/**
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* Determine whether a block of a given type exists on a given object.
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*/
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function contentblocker_has_block($type, $object) {
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global $user;
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$data = contentblocker_get_data($type);
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$object_field = $data['object_field'];
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// If the join field is also the primary field, we filter by the object field.
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if ($data['primary_join_field'] == $date['primary_id_field']) {
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$and = 'cb.id = %d';
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}
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// Otherwise, we filter by the join field.
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else {
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$and = $data['primary_table_alias'] .'.'. $data['primary_join_field'] .' = %d';
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}
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$result = db_query("SELECT cb.* FROM {contentblocker} cb INNER JOIN {". $data['primary_table'] ."} ". $data['primary_table_alias'] ." ON cb.id = ". $data['primary_table_alias'] .".". $data['primary_id_field'] ." WHERE cb.uid = %d and cb.type = '%s' AND ". $and, $user->uid, isset($data['save_type']) ? $data['save_type'] : $type, $object->$object_field);
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return db_num_rows($result) ? 1 : 0;
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}
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/**
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* Save blocking information for a node.
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*/
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function contentblocker_save_block($type, $object) {
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global $user;
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$data = contentblocker_get_data($type);
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// Determine value of join field.
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$data = contentblocker_get_data($type);
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$field = $data['object_field'];
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if ($id = db_result(db_query("SELECT ". $data['primary_table_alias'] .".". $data['primary_id_field'] ." FROM {". $data['primary_table'] ."} ". $data['primary_table_alias'] ." INNER JOIN {". $data['object_table'] ."} ". $data['object_table_alias'] ." ON ". $data['primary_table_alias'] .".". $data['primary_join_field'] ." = ". $data['object_table_alias'] .".". $data['object_field'] ." WHERE ". $data['object_table_alias'] .".". $data['object_field'] ." = %d", $object->$field))) {
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$has_block = contentblocker_has_block($type, $object);
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$property = 'contentblocker_'. $type;
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switch ($object->$property) {
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// Delete existing block.
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case 0:
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if ($has_block) {
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db_query("DELETE FROM {contentblocker} WHERE uid = %d AND type = '%s' AND id = %d", $user->uid, isset($data['save_type']) ? $data['save_type'] : $type, $id);
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}
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break;
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// Insert a new block.
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case 1:
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if (!$has_block) {
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db_query("INSERT INTO {contentblocker} (uid, type, id) VALUES (%d, '%s', %d)", $user->uid, isset($data['save_type']) ? $data['save_type'] : $type, $id);
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}
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break;
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}
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// Menus need to reflect the current state of the users' registered content blocks.
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menu_rebuild();
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}
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}
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/**
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* Return data used to determine blocking behaviour.
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*/
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function contentblocker_get_data($type = NULL) {
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static $data;
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if ($data == NULL) {
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$data = array();
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foreach (module_implements('contentblocker_data') as $module) {
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// Test for access. We won't need to test for access again
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// on data loaded from this function, since we already know the
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// user has access.
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if (user_access(_contentblocker_get_perm($module))) {
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$data = array_merge($data, module_invoke($module, 'contentblocker_data'));
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}
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}
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}
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return $type ? ($data[$type] ? $data[$type] : FALSE) : $data;
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}
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/**
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* Return data used to determine blocking behaviour.
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*/
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function contentblocker_get_options($obj_type, $obj) {
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$data = array();
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foreach (module_implements('contentblocker_options') as $module) {
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// Test for access. We won't need to test for access again
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// on data loaded from this function, since we already know the
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// user has access.
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if (user_access(_contentblocker_get_perm($module))) {
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$data = array_merge($data, module_invoke($module, 'contentblocker_options', $obj_type, $obj));
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}
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}
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return $data;
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}
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/**
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* Implementation of hook_db_rewrite_sql().
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*/
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function contentblocker_db_rewrite_sql($query, $primary_table, $primary_field) {
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global $user;
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$return = array();
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// Only block content for logged in users. Act on nodes.
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if ($user->uid && $primary_field == 'nid') {
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$return = contentblocker_node_sql($user->uid, $primary_table);
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}
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return $return;
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}
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/**
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* Return SQL fragments for blocking nodes.
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*/
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function contentblocker_node_sql($uid = NULL, $primary_table = 'n') {
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global $user;
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$return = array();
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$uid = ($uid == NULL) ? $user->uid : $uid;
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$join = array();
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// If altering a query on other than the node table, join on node
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// and use it instead as the primary table.
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if (!($primary_table == 'n' || $primary_table == 'node')) {
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$join[] = "LEFT JOIN {node} n ON $primary_table.nid = n.nid";
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$primary_table = 'n';
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}
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$where = array();
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$types = contentblocker_get_block_types($uid);
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if (!empty($types)) {
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foreach($types as $index => $type) {
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$sql = contentblocker_node_sql_type($type, $index, $uid, $primary_table);
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if (isset($sql['join'])) {
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$join[] = $sql['join'];
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}
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$where[] = $sql['where'];
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}
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if (!empty($join)) {
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$return['join'] = implode(' ', $join);
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}
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if (!empty($where)) {
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$return['where'] = implode(' AND ', $where);
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}
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}
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return $return;
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}
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/**
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* Return SQL fragments for blocking nodes.
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*/
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function contentblocker_node_sql_type($type, $index, $uid, $primary_table = 'n') {
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$return = array();
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$data = contentblocker_get_data($type);
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// If this type doesn't save its own data, return.
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if (isset($data['save_type']) && !empty($data['save_type'])) {
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return array();
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}
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if ($data['block_table'] != 'node') {
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$return['join'] = "LEFT JOIN {". $data['block_table'] ."} ". $data['block_table_alias'] ." ON ". $primary_table .".". $data['primary_join_field'] ." = ". $data['block_table_alias'] .".". $data['block_field'];
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}
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else {
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$data['block_table_alias'] = $primary_table;
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}
|
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// MySQL didn't support subqueries before 4.1.
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if ($GLOBALS['db_type'] == 'mysql' && version_compare(mysql_get_server_info($GLOBALS['active_db']), '4.1.0', '<')) {
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$ids = array();
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$result = db_query("SELECT id FROM {contentblocker} WHERE type = '%s' AND uid = %d", $type, $uid);
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while ($row = db_fetch_array($result)) {
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$ids[] = $row['id'];
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}
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$return['where'] = "(". $data['block_table_alias'] ."." .$data['block_field'] ." NOT IN(". implode(',', $ids) .") OR ". $data['block_table_alias'] ."." .$data['block_field'] ." IS NULL)";
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}
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else {
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// $type is potentially user input, so escape it.
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$return['where'] = "(". $data['block_table_alias'] ."." .$data['block_field'] ." NOT IN(SELECT id FROM {contentblocker} WHERE type = '". db_escape_string($type) ."' AND uid = ". $uid .") OR ". $data['block_table_alias'] ."." .$data['block_field'] ." IS NULL)";
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}
|
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return $return;
|
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}
|
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|
| 362 |
/**
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| 363 |
* Return the list of registered block types.
|
| 364 |
*/
|
| 365 |
function contentblocker_get_block_types($uid = NULL) {
|
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| 367 |
if ($uid) {
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$types = array();
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$result = db_query("SELECT DISTINCT(type) FROM {contentblocker} WHERE uid = %d", $uid);
|
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while ($type = db_fetch_array($result)) {
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$types[] = $type['type'];
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}
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return $types;
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}
|
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else {
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| 376 |
return array_keys(contentblocker_get_data());
|
| 377 |
}
|
| 378 |
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| 379 |
}
|
| 380 |
|
| 381 |
/**
|
| 382 |
* Load the include files used by this module.
|
| 383 |
*/
|
| 384 |
function contentblocker_load_modules() {
|
| 385 |
static $modules;
|
| 386 |
if ($modules == NULL) {
|
| 387 |
$modules = variable_get('contentblocker_modules', array());
|
| 388 |
if (!empty($modules)) {
|
| 389 |
$path = drupal_get_path('module', 'contentblocker');
|
| 390 |
foreach ($modules as $module) {
|
| 391 |
if (module_exists($module)) {
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| 392 |
module_load_include('inc', 'contentblocker', 'modules/' . $module);
|
| 393 |
}
|
| 394 |
else {
|
| 395 |
unset($modules[$module]);
|
| 396 |
}
|
| 397 |
}
|
| 398 |
}
|
| 399 |
}
|
| 400 |
return $modules;
|
| 401 |
}
|
| 402 |
|
| 403 |
/**
|
| 404 |
* Read and return the name defined in a module's .info file.
|
| 405 |
*/
|
| 406 |
function _contentblocker_get_module_name($module) {
|
| 407 |
static $names = array();
|
| 408 |
if (!isset($names[$module])) {
|
| 409 |
$info = _module_parse_info_file(drupal_get_path('module', $module) .'/'. $module .'.info');
|
| 410 |
$names[$module] = $info['name'] ? $info['name'] : $module;
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| 411 |
}
|
| 412 |
return $names[$module];
|
| 413 |
}
|
| 414 |
|
| 415 |
/**
|
| 416 |
* Implementation of hook_fasttoggle_options().
|
| 417 |
*/
|
| 418 |
function contentblocker_fasttoggle_options($type, $obj) {
|
| 419 |
$return = array();
|
| 420 |
switch ($type) {
|
| 421 |
case 'node':
|
| 422 |
case 'comment':
|
| 423 |
$data = contentblocker_get_options($type, $obj);
|
| 424 |
$options = array();
|
| 425 |
foreach (array_keys($data) as $cb_type) {
|
| 426 |
$options['contentblocker_'. $cb_type] = $data[$cb_type];
|
| 427 |
}
|
| 428 |
return $options;
|
| 429 |
}
|
| 430 |
}
|
| 431 |
|
| 432 |
/**
|
| 433 |
* Menu callback. Provide administration for content filters.
|
| 434 |
*/
|
| 435 |
function contentblocker_admin($type) {
|
| 436 |
global $user;
|
| 437 |
$data = contentblocker_get_data($type);
|
| 438 |
$form = array();
|
| 439 |
$form['title'] = array();
|
| 440 |
$items = array();
|
| 441 |
|
| 442 |
$result = pager_query("SELECT cb.id, ". $data['title_table_alias'] .".". $data['title_field'] ." FROM {contentblocker} cb INNER JOIN {". $data['title_table'] ."} ". $data['title_table_alias'] ." ON cb.id = ". $data['title_table_alias']. ".". $data['title_id_field'] ." WHERE cb.type = '%s' AND cb.uid = %d ORDER BY ". $data['title_table_alias'] .".". $data['title_field'], 50, 0, NULL, $type, $user->uid);
|
| 443 |
|
| 444 |
while ($item = db_fetch_array($result)) {
|
| 445 |
$items[$item['id']] = '';
|
| 446 |
$title_property = $data['title_property'];
|
| 447 |
$form['title'][$item['id']] = array('#value' => l($item[$data['title_field']], $data['title_path_prefix'] .'/'. $item['id']));
|
| 448 |
}
|
| 449 |
$form['items'] = array('#type' => 'checkboxes', '#options' => $items);
|
| 450 |
$form['pager'] = array('#value' => theme('pager', NULL, 50, 0));
|
| 451 |
$form['uid'] = array('#type' => 'value', '#value' => $user->uid);
|
| 452 |
$form['contentblocker_type'] = array('#type' => 'value', '#value' => $type);
|
| 453 |
$form['options']['submit'] = array('#type' => 'submit', '#value' => t('Delete selected filters'));
|
| 454 |
return $form;
|
| 455 |
}
|
| 456 |
|
| 457 |
/**
|
| 458 |
* Theme contentblocker administration overview.
|
| 459 |
*/
|
| 460 |
function theme_contentblocker_admin($form) {
|
| 461 |
// Overview table:
|
| 462 |
$header = array(theme('table_select_header_cell'), t('Title'));
|
| 463 |
|
| 464 |
if (count(element_children($form['title']))) {
|
| 465 |
foreach (element_children($form['title']) as $key) {
|
| 466 |
$row = array();
|
| 467 |
$row[] = drupal_render($form['items'][$key]);
|
| 468 |
$row[] = drupal_render($form['title'][$key]);
|
| 469 |
$rows[] = $row;
|
| 470 |
}
|
| 471 |
|
| 472 |
}
|
| 473 |
else {
|
| 474 |
$rows[] = array(array('data' => t('No content filters available.'), 'colspan' => '2'));
|
| 475 |
}
|
| 476 |
|
| 477 |
$output .= theme('table', $header, $rows);
|
| 478 |
if ($form['pager']['#value']) {
|
| 479 |
$output .= drupal_render($form['pager']);
|
| 480 |
}
|
| 481 |
|
| 482 |
$output .= drupal_render($form);
|
| 483 |
|
| 484 |
return $output;
|
| 485 |
}
|
| 486 |
|
| 487 |
/**
|
| 488 |
* Submit the contentblocker administration form.
|
| 489 |
*/
|
| 490 |
function contentblocker_admin_submit($form, &$form_state) {
|
| 491 |
// Filter out unchecked nodes
|
| 492 |
$items = array_filter($form_state['values']['items']);
|
| 493 |
$count = 0;
|
| 494 |
foreach ($items as $id) {
|
| 495 |
db_query("DELETE FROM {contentblocker} WHERE uid = %d AND type = '%s' AND id = %d", $form_state['values']['uid'], $form_state['values']['contentblocker_type'], $id);
|
| 496 |
$count ++;
|
| 497 |
}
|
| 498 |
drupal_set_message(format_plural($count, '1 filter deleted', '@count filters deleted'));
|
| 499 |
}
|
| 500 |
|
| 501 |
/**
|
| 502 |
* Validate the contentblocker administration form.
|
| 503 |
*/
|
| 504 |
function contentblocker_admin_validate($form, &$form_state) {
|
| 505 |
$items = array_filter($form_state['values']['items']);
|
| 506 |
if (count($items) == 0) {
|
| 507 |
form_set_error('', t('No items selected.'));
|
| 508 |
}
|
| 509 |
}
|
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