<?php
/*
+--------------------------------------------------------------------+
| Copyright CiviCRM LLC. All rights reserved. |
| |
| This work is published under the GNU AGPLv3 license with some |
| permitted exceptions and without any warranty. For full license |
| and copyright information, see https://civicrm.org/licensing |
+--------------------------------------------------------------------+
*/
/**
*
* @package CRM
* @copyright CiviCRM LLC https://civicrm.org/licensing
*
*/
// This file must not accessed directly.
if (!defined('ABSPATH')) {
exit;
}
/**
* Define CiviCRM_For_WordPress_Basepage Class.
*
* @since 4.6
*/
class CiviCRM_For_WordPress_Basepage {
/**
* @var object
* Plugin object reference.
* @since 4.6
* @access public
*/
public $civi;
/**
* Instance constructor.
*
* @since 4.6
*/
public function __construct() {
// Store reference to CiviCRM plugin object.
$this->civi = civi_wp();
// Always listen for activation action.
add_action('civicrm_activation', [$this, 'activate']);
// Always listen for deactivation action.
add_action('civicrm_deactivation', [$this, 'deactivate']);
// Always check if the basepage needs to be created.
add_action('civicrm_instance_loaded', [$this, 'maybe_create_basepage']);
}
/**
* Register hooks to handle CiviCRM in a WordPress wpBasePage context.
*
* @since 4.6
*/
public function register_hooks() {
// Kick out if not CiviCRM.
if (!$this->civi->initialize()) {
return;
}
// Cache CiviCRM base page markup.
add_action('wp', [$this, 'basepage_handler'], 10, 1);
}
/**
* Trigger the process whereby the WordPress basepage is created.
*
* Sets a one-time-only option to flag that we need to create a basepage -
* it will not update the option once it has been set to another value nor
* create a new option with the same name.
*
* As a result of doing this, we know that a basepage needs to be created, but
* the moment to do so is once CiviCRM has been successfully installed.
*
* @see do_basepage_creation()
*
* @since 5.6
*/
public function activate() {
// Save option.
add_option('civicrm_activation_create_basepage', 'true');
}
/**
* Plugin deactivation.
*
* @since 5.6
*/
public function deactivate() {
// Delete option.
delete_option('civicrm_activation_create_basepage');
}
/**
* Register the hook to create the WordPress basepage, if necessary.
*
* Changes the one-time-only option so that the basepage can only be created
* once. Thereafter, we're on our own until there's a 'delete_post' callback
* to prevent the basepage from being deleted.
*
* @since 5.6
*/
public function maybe_create_basepage() {
// Bail if CiviCRM not installed.
if (!CIVICRM_INSTALLED) {
return;
}
// Bail if not installing.
if (get_option('civicrm_activation_create_basepage') !== 'true') {
return;
}
// Bail if not WordPress admin.
if (!is_admin()) {
return;
}
// Create basepage.
add_action('wp_loaded', [$this, 'create_wp_basepage']);
// Change option so the callback above never runs again.
update_option('civicrm_activation_create_basepage', 'done');
}
/**
* Create WordPress basepage and save setting.
*
* @since 4.6
* @since 5.6 Relocated from CiviCRM_For_WordPress to here.
*/
public function create_wp_basepage() {
if (!$this->civi->initialize()) {
return;
}
$config = CRM_Core_Config::singleton();
// Bail if we already have a basepage setting.
if (!empty($config->wpBasePage)) {
return;
}
/**
* Filter the default page slug.
*
* @since 4.6
*
* @param str The default basepage slug.
* @return str The modified basepage slug.
*/
$slug = apply_filters('civicrm_basepage_slug', 'civicrm');
// Get existing page with that slug.
$page = get_page_by_path($slug);
// Does it exist?
if ($page) {
// We already have a basepage.
$result = $page->ID;
}
else {
// Create the basepage.
$result = $this->create_basepage($slug);
}
// Were we successful?
if ($result !== 0 && !is_wp_error($result)) {
// Get the post object.
$post = get_post($result);
$params = [
'version' => 3,
'wpBasePage' => $post->post_name,
];
// Save the setting.
civicrm_api3('setting', 'create', $params);
}
}
/**
* Create a WordPress page to act as the CiviCRM base page.
*
* @since 4.6
* @since 5.6 Relocated from CiviCRM_For_WordPress to here.
*
* @param string $slug The unique slug for the page - same as wpBasePage setting.
* @return int|WP_Error The page ID on success. The value 0 or WP_Error on failure.
*/
private function create_basepage($slug) {
// If multisite, switch to main site.
if (is_multisite() && !is_main_site()) {
// Store this site.
$original_site = get_current_blog_id();
// Switch.
global $current_site;
switch_to_blog($current_site->blog_id);
}
// Define basepage.
$page = [
'post_status' => 'publish',
'post_type' => 'page',
'post_parent' => 0,
'comment_status' => 'closed',
'ping_status' => 'closed',
// Quick fix for Windows.
'to_ping' => '',
// Quick fix for Windows.
'pinged' => '',
// Quick fix for Windows.
'post_content_filtered' => '',
// Quick fix for Windows.
'post_excerpt' => '',
'menu_order' => 0,
'post_name' => $slug,
];
/**
* Filter the default page title.
*
* @since 4.6
*
* @param str The default base page title.
* @return str The modified base page title.
*/
$page['post_title'] = apply_filters('civicrm_basepage_title', __('CiviCRM', 'civicrm'));
// Default content.
$content = __('Do not delete this page. Page content is generated by CiviCRM.', 'civicrm');
/**
* Filter the default page content.
*
* @since 4.6
*
* @param str $content The default base page content.
* @return str $content The modified base page content.
*/
$page['post_content'] = apply_filters('civicrm_basepage_content', $content);
// Insert the post into the database.
$page_id = wp_insert_post($page);
// Switch back if we've switched.
if (isset($original_site)) {
restore_current_blog();
}
// Make sure Rewrite Rules are flushed.
delete_option('civicrm_rules_flushed');
return $page_id;
}
/**
* Build CiviCRM base page content.
*
* Callback method for 'wp' hook, always called from WordPress front-end.
*
* @since 4.6
*
* @param object $wp The WordPress object, present but not used.
*/
public function basepage_handler($wp) {
/*
* At this point, all conditional tags are available.
* @see https://codex.wordpress.org/Conditional_Tags
*/
// Bail if this is a 404.
if (is_404()) {
return;
}
// Bail if this is a Favicon request.
if (is_favicon()) {
return;
}
// Do not proceed without the presence of the CiviCRM query var.
$civicrm_in_wordpress = $this->civi->civicrm_in_wordpress();
if (!$civicrm_in_wordpress) {
return;
}
// Kick out if not CiviCRM.
if (!$this->civi->initialize()) {
return;
}
// Get the current Base Page and set a "found" flag.
$basepage = $this->basepage_get();
$basepage_found = FALSE;
// Get the Shortcode Mode setting.
$shortcode_mode = $this->civi->admin->get_shortcode_mode();
/*
* Let's do the_loop.
* This has the effect of bypassing the logic in:
* @see https://github.com/civicrm/civicrm-wordpress/pull/36
*/
if (have_posts()) {
while (have_posts()) {
the_post();
global $post;
/**
* Allow "Base Page mode" to be forced.
*
* Return TRUE to force CiviCRM to render a Post/Page as if on the Base Page.
*
* @since 5.44
*
* @param bool By default "Base Page mode" should not be triggered.
* @param WP_Post $post The current WordPress Post object.
* @return bool Whether or not to force "Base Page mode" - FALSE by default.
*/
$basepage_mode = (bool) apply_filters('civicrm_force_basepage_mode', FALSE, $post);
// Skip when this is not the Base Page or when "Base Page mode" is not forced or not in "legacy mode".
if ($basepage->ID === $post->ID || $basepage_mode || $shortcode_mode === 'legacy') {
// Set context.
$this->civi->civicrm_context_set('basepage');
// Start buffering.
ob_start();
// Now, instead of echoing, base page output ends up in buffer.
$this->civi->invoke();
// Save the output and flush the buffer.
$this->basepage_markup = ob_get_clean();
/*
* The following logic is in response to some of the complexities of how
* titles are handled in WordPress, particularly when there are SEO
* plugins present that modify the title for Open Graph purposes. There
* have also been issues with the default WordPress themes, which modify
* the title using the 'wp_title' filter.
*
* First, we try and set the title of the page object, which will work
* if the loop is not run subsequently and if there are no additional
* filters on the title.
*
* Second, we store the CiviCRM title so that we can construct the base
* page title if other plugins modify it.
*/
// Override post title.
global $civicrm_wp_title;
$post->post_title = $civicrm_wp_title;
// Because the above seems unreliable, store title for later use.
$this->basepage_title = $civicrm_wp_title;
// Disallow commenting.
$post->comment_status = 'closed';
// Put CiviCRM into "Base Page mode".
$basepage_found = TRUE;
}
}
}
// Reset loop.
rewind_posts();
// Bail if the Base Page has not been processed.
if (!$basepage_found) {
return;
}
// Hide the edit link.
add_action('edit_post_link', [$this, 'clear_edit_post_link']);
// Tweak admin bar.
add_action('wp_before_admin_bar_render', [$this, 'clear_edit_post_menu_item']);
// Add body classes for easier styling.
add_filter('body_class', [$this, 'add_body_classes']);
// In WordPress 4.6.0+, tell it URL params are part of canonical URL.
add_filter('get_canonical_url', [$this, 'basepage_canonical_url'], 999);
// Yoast SEO has separate way of establishing canonical URL.
add_filter('wpseo_canonical', [$this, 'basepage_canonical_url'], 999);
// And also for All in One SEO to handle canonical URL.
add_filter('aioseop_canonical_url', [$this, 'basepage_canonical_url'], 999);
// Override page title with high priority.
add_filter('wp_title', [$this, 'wp_page_title'], 100, 3);
add_filter('document_title_parts', [$this, 'wp_page_title_parts'], 100, 1);
// Add compatibility with Yoast SEO plugin's Open Graph title.
add_filter('wpseo_opengraph_title', [$this, 'wpseo_page_title'], 100, 1);
// Don't let the Yoast SEO plugin parse the basepage title.
if (class_exists('WPSEO_Frontend')) {
$frontend = WPSEO_Frontend::get_instance();
remove_filter('pre_get_document_title', [$frontend, 'title'], 15);
}
// Regardless of URL, load page template.
add_filter('template_include', [$this, 'basepage_template'], 999);
// Check permission.
$argdata = $this->civi->get_request_args();
if (!$this->civi->users->check_permission($argdata['args'])) {
// Do not show content.
add_filter('the_content', [$this->civi->users, 'get_permission_denied']);
}
else {
// Add core resources for front end.
add_action('wp', [$this->civi, 'front_end_page_load'], 100);
// Include this content when Base Page is rendered.
add_filter('the_content', [$this, 'basepage_render']);
}
// Flag that we have parsed the base page.
$this->basepage_parsed = TRUE;
/**
* Broadcast that the base page is parsed.
*
* @since 4.4
*/
do_action('civicrm_basepage_parsed');
}
/**
* Get CiviCRM basepage title for <title> element.
*
* Callback method for 'wp_title' hook, called at the end of function wp_title.
*
* @since 4.6
*
* @param string $title Title that might have already been set.
* @param string $separator Separator determined in theme (but defaults to WordPress default).
* @param string $separator_location Whether the separator should be left or right.
*/
public function wp_page_title($title, $separator = '»', $separator_location = '') {
// If feed, return just the title.
if (is_feed()) {
return $this->basepage_title;
}
// Set default separator location, if it isn't defined.
if ('' === trim($separator_location)) {
$separator_location = (is_rtl()) ? 'left' : 'right';
}
// If we have WP SEO present, use its separator.
if (class_exists('WPSEO_Options')) {
$separator_code = WPSEO_Options::get_default('wpseo_titles', 'separator');
$separator_array = WPSEO_Option_Titles::get_instance()->get_separator_options();
if (array_key_exists($separator_code, $separator_array)) {
$separator = $separator_array[$separator_code];
}
}
// Construct title depending on separator location.
if ($separator_location == 'right') {
$title = $this->basepage_title . " $separator " . get_bloginfo('name', 'display');
}
else {
$title = get_bloginfo('name', 'display') . " $separator " . $this->basepage_title;
}
// Return modified title.
return $title;
}
/**
* Get CiviCRM basepage title for <title> element.
*
* Callback method for 'document_title_parts' hook. This filter was introduced
* in WordPress 3.8 but it depends on whether the theme has implemented that
* method for generating the title or not.
*
* @since 5.14
*
* @param array $parts The existing title parts.
* @return array $parts The modified title parts.
*/
public function wp_page_title_parts($parts) {
// Override with CiviCRM's title.
if (isset($parts['title'])) {
$parts['title'] = $this->basepage_title;
}
// Return modified title parts.
return $parts;
}
/**
* Get CiviCRM base page title for Open Graph elements.
*
* Callback method for 'wpseo_opengraph_title' hook, to provide compatibility
* with the WordPress SEO plugin.
*
* @since 4.6.4
*
* @param string $post_title The title of the WordPress page or post.
* @return string $basepage_title The title of the CiviCRM entity.
*/
public function wpseo_page_title($post_title) {
// Hand back our base page title.
return $this->basepage_title;
}
/**
* Get CiviCRM base page content.
*
* Callback method for 'the_content' hook, always called from WordPress
* front-end.
*
* @since 4.6
*
* @return str $basepage_markup The base page markup.
*/
public function basepage_render() {
// Hand back our base page markup.
return $this->basepage_markup;
}
/**
* Provide the canonical URL for a page accessed through a basepage.
*
* WordPress will default to saying the canonical URL is the URL of the base
* page itself, but we need to indicate that in this case, the whole thing
* matters.
*
* Note: this function is used for three different but similar hooks:
* - `get_canonical_url` (WordPress 4.6.0+)
* - `aioseop_canonical_url` (All in One SEO)
* - `wpseo_canonical` (Yoast WordPress SEO)
*
* The native WordPress one passes the page object, while the other two do
* not. We don't actually need the page object, so the argument is omitted
* here.
*
* @since 4.6
*
* @param string $canonical The canonical URL.
* @return string The complete URL to the page as it should be accessed.
*/
public function basepage_canonical_url($canonical) {
// Access CiviCRM config object.
$config = CRM_Core_Config::singleton();
// Retain old logic when not using clean URLs.
if (!$config->cleanURL) {
/*
* It would be better to specify which params are okay to accept as the
* canonical URLs, but this will work for the time being.
*/
if (empty($_GET['civiwp'])
|| empty($_GET['q'])
|| 'CiviCRM' !== $_GET['civiwp']) {
return $canonical;
}
$path = $_GET['q'];
unset($_GET['q']);
unset($_GET['civiwp']);
$query = http_build_query($_GET);
}
else {
$argdata = $this->civi->get_request_args();
$path = $argdata['argString'];
$query = http_build_query($_GET);
}
/*
* We should, however, build the URL the way that CiviCRM expects it to be
* (rather than through some other funny base page).
*/
return CRM_Utils_System::url($path, $query);
}
/**
* Get CiviCRM base page template.
*
* Callback method for 'template_include' hook, always called from WordPress
* front-end.
*
* @since 4.6
*
* @param string $template The path to the existing template.
* @return string $template The modified path to the desired template.
*/
public function basepage_template($template) {
// Get template path relative to the theme's root directory.
$template_name = str_replace(trailingslashit(get_stylesheet_directory()), '', $template);
// If the above fails, try parent theme.
if ($template_name == $template) {
$template_name = str_replace(trailingslashit(get_template_directory()), '', $template);
}
// Bail in the unlikely event that the template name has not been found.
if ($template_name == $template) {
return $template;
}
/**
* Allow base page template to be overridden.
*
* In most cases, the logic will not progress beyond here. Shortcodes in
* posts and pages will have a template set, so we leave them alone unless
* specifically overridden by the filter.
*
* @since 4.6
*
* @param string $template_name The provided template name.
* @return string The overridden template name.
*/
$basepage_template = apply_filters('civicrm_basepage_template', $template_name);
// Find the base page template.
$page_template = locate_template([$basepage_template]);
// If not homepage and template is found.
if ('' != $page_template && !is_front_page()) {
return $page_template;
}
/**
* Override the template, but allow plugins to amend.
*
* This filter handles the scenario where no basepage has been set, in
* which case CiviCRM will try to load its content in the site's homepage.
* Many themes, however, do not have a call to "the_content()" on the
* homepage - it is often used as a gateway page to display widgets,
* archives and so forth.
*
* Be aware that if the homepage is set to show latest posts, then this
* template override will not have the desired effect. A basepage *must*
* be set if this is the case.
*
* @since 4.6
*
* @param string The template name (set to the default page template).
* @return string The overridden template name.
*/
$home_template_name = apply_filters('civicrm_basepage_home_template', 'page.php');
// Find the homepage template.
$home_template = locate_template([$home_template_name]);
// Use it if found.
if ('' != $home_template) {
return $home_template;
}
// Fall back to provided template.
return $template;
}
/**
* Add classes to body element when on basepage.
*
* This allows selectors to be written for particular CiviCRM "pages" despite
* them all being rendered on the one WordPress basepage.
*
* @since 4.7.18
*
* @param array $classes The existing body classes.
* @return array $classes The modified body classes.
*/
public function add_body_classes($classes) {
$args = $this->civi->get_request_args();
// Bail if we don't have any.
if (is_null($args['argString'])) {
return $classes;
}
// Check for top level - it can be assumed this always 'civicrm'.
if (isset($args['args'][0]) && !empty($args['args'][0])) {
$classes[] = $args['args'][0];
}
// Check for second level - the component.
if (isset($args['args'][1]) && !empty($args['args'][1])) {
$classes[] = $args['args'][0] . '-' . $args['args'][1];
}
// Check for third level - the component's configuration.
if (isset($args['args'][2]) && !empty($args['args'][2])) {
$classes[] = $args['args'][0] . '-' . $args['args'][1] . '-' . $args['args'][2];
}
// Check for fourth level - because well, why not?
if (isset($args['args'][3]) && !empty($args['args'][3])) {
$classes[] = $args['args'][0] . '-' . $args['args'][1] . '-' . $args['args'][2] . '-' . $args['args'][3];
}
return $classes;
}
/**
* Remove edit link from page content.
*
* Callback from 'edit_post_link' hook.
*
* @since 4.6
* @since 5.33 Moved to this class.
*
* @return string Always empty.
*/
public function clear_edit_post_link() {
return '';
}
/**
* Remove edit link in WordPress Admin Bar.
*
* Callback from 'wp_before_admin_bar_render' hook.
*
* @since 4.6
*/
public function clear_edit_post_menu_item() {
// Access object.
global $wp_admin_bar;
// Bail if in admin.
if (is_admin()) {
return;
}
// Remove the menu item from front end.
$wp_admin_bar->remove_menu('edit');
}
/**
* Gets the current Base Page object.
*
* @since 5.44
*
* @return WP_Post|bool The Base Page object or FALSE on failure.
*/
public function basepage_get() {
// Kick out if not CiviCRM.
if (!$this->civi->initialize()) {
return FALSE;
}
// Get the setting.
$basepage_slug = civicrm_api3('Setting', 'getvalue', [
'name' => 'wpBasePage',
'group' => 'CiviCRM Preferences',
]);
// Did we get a value?
if (!empty($basepage_slug)) {
// Define the query for our Base Page.
$args = [
'post_type' => 'page',
'name' => strtolower($basepage_slug),
'post_status' => 'publish',
'posts_per_page' => 1,
];
// Do the query.
$pages = get_posts($args);
}
// Find the Base Page object.
$basepage = FALSE;
if (!empty($pages) && is_array($pages)) {
$basepage = array_pop($pages);
}
return $basepage;
}
}