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-rw-r--r--mod/blog/lib/blog.php478
1 files changed, 478 insertions, 0 deletions
diff --git a/mod/blog/lib/blog.php b/mod/blog/lib/blog.php
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+<?php
+/**
+ * Blog helper functions
+ *
+ * @package Blog
+ */
+
+
+/**
+ * Get page components to view a blog post.
+ *
+ * @param int $guid GUID of a blog entity.
+ * @return array
+ */
+function blog_get_page_content_read($guid = NULL) {
+
+ $return = array();
+
+ $blog = get_entity($guid);
+
+ // no header or tabs for viewing an individual blog
+ $return['filter'] = '';
+
+ if (!elgg_instanceof($blog, 'object', 'blog')) {
+ register_error(elgg_echo('noaccess'));
+ $_SESSION['last_forward_from'] = current_page_url();
+ forward('');
+ }
+
+ $return['title'] = $blog->title;
+
+ $container = $blog->getContainerEntity();
+ $crumbs_title = $container->name;
+ if (elgg_instanceof($container, 'group')) {
+ elgg_push_breadcrumb($crumbs_title, "blog/group/$container->guid/all");
+ } else {
+ elgg_push_breadcrumb($crumbs_title, "blog/owner/$container->username");
+ }
+
+ elgg_push_breadcrumb($blog->title);
+ $return['content'] = elgg_view_entity($blog, array('full_view' => true));
+ // check to see if we should allow comments
+ if ($blog->comments_on != 'Off' && $blog->status == 'published') {
+ $return['content'] .= elgg_view_comments($blog);
+ }
+
+ return $return;
+}
+
+/**
+ * Get page components to list a user's or all blogs.
+ *
+ * @param int $container_guid The GUID of the page owner or NULL for all blogs
+ * @return array
+ */
+function blog_get_page_content_list($container_guid = NULL) {
+
+ $return = array();
+
+ $return['filter_context'] = $container_guid ? 'mine' : 'all';
+
+ $options = array(
+ 'type' => 'object',
+ 'subtype' => 'blog',
+ 'full_view' => false,
+ );
+
+ $current_user = elgg_get_logged_in_user_entity();
+
+ if ($container_guid) {
+ // access check for closed groups
+ group_gatekeeper();
+
+ $options['container_guid'] = $container_guid;
+ $container = get_entity($container_guid);
+ if (!$container) {
+
+ }
+ $return['title'] = elgg_echo('blog:title:user_blogs', array($container->name));
+
+ $crumbs_title = $container->name;
+ elgg_push_breadcrumb($crumbs_title);
+
+ if ($current_user && ($container_guid == $current_user->guid)) {
+ $return['filter_context'] = 'mine';
+ } else if (elgg_instanceof($container, 'group')) {
+ $return['filter'] = false;
+ } else {
+ // do not show button or select a tab when viewing someone else's posts
+ $return['filter_context'] = 'none';
+ }
+ } else {
+ $return['filter_context'] = 'all';
+ $return['title'] = elgg_echo('blog:title:all_blogs');
+ elgg_pop_breadcrumb();
+ elgg_push_breadcrumb(elgg_echo('blog:blogs'));
+ }
+
+ elgg_register_title_button();
+
+ // show all posts for admin or users looking at their own blogs
+ // show only published posts for other users.
+ $show_only_published = true;
+ if ($current_user) {
+ if (($current_user->guid == $container_guid) || $current_user->isAdmin()) {
+ $show_only_published = false;
+ }
+ }
+ if ($show_only_published) {
+ $options['metadata_name_value_pairs'] = array(
+ array('name' => 'status', 'value' => 'published'),
+ );
+ }
+
+ $list = elgg_list_entities_from_metadata($options);
+ if (!$list) {
+ $return['content'] = elgg_echo('blog:none');
+ } else {
+ $return['content'] = $list;
+ }
+
+ return $return;
+}
+
+/**
+ * Get page components to list of the user's friends' posts.
+ *
+ * @param int $user_guid
+ * @return array
+ */
+function blog_get_page_content_friends($user_guid) {
+
+ $user = get_user($user_guid);
+ if (!$user) {
+ forward('blog/all');
+ }
+
+ $return = array();
+
+ $return['filter_context'] = 'friends';
+ $return['title'] = elgg_echo('blog:title:friends');
+
+ $crumbs_title = $user->name;
+ elgg_push_breadcrumb($crumbs_title, "blog/owner/{$user->username}");
+ elgg_push_breadcrumb(elgg_echo('friends'));
+
+ elgg_register_title_button();
+
+ if (!$friends = get_user_friends($user_guid, ELGG_ENTITIES_ANY_VALUE, 0)) {
+ $return['content'] .= elgg_echo('friends:none:you');
+ return $return;
+ } else {
+ $options = array(
+ 'type' => 'object',
+ 'subtype' => 'blog',
+ 'full_view' => FALSE,
+ );
+
+ foreach ($friends as $friend) {
+ $options['container_guids'][] = $friend->getGUID();
+ }
+
+ // admin / owners can see any posts
+ // everyone else can only see published posts
+ $show_only_published = true;
+ $current_user = elgg_get_logged_in_user_entity();
+ if ($current_user) {
+ if (($user_guid == $current_user->guid) || $current_user->isAdmin()) {
+ $show_only_published = false;
+ }
+ }
+ if ($show_only_published) {
+ $options['metadata_name_value_pairs'][] = array(
+ array('name' => 'status', 'value' => 'published')
+ );
+ }
+
+ $list = elgg_list_entities_from_metadata($options);
+ if (!$list) {
+ $return['content'] = elgg_echo('blog:none');
+ } else {
+ $return['content'] = $list;
+ }
+ }
+
+ return $return;
+}
+
+/**
+ * Get page components to show blogs with publish dates between $lower and $upper
+ *
+ * @param int $owner_guid The GUID of the owner of this page
+ * @param int $lower Unix timestamp
+ * @param int $upper Unix timestamp
+ * @return array
+ */
+function blog_get_page_content_archive($owner_guid, $lower = 0, $upper = 0) {
+
+ $now = time();
+
+ $owner = get_entity($owner_guid);
+ elgg_set_page_owner_guid($owner_guid);
+
+ $crumbs_title = $owner->name;
+ if (elgg_instanceof($owner, 'user')) {
+ $url = "blog/owner/{$owner->username}";
+ } else {
+ $url = "blog/group/$owner->guid/all";
+ }
+ elgg_push_breadcrumb($crumbs_title, $url);
+ elgg_push_breadcrumb(elgg_echo('blog:archives'));
+
+ if ($lower) {
+ $lower = (int)$lower;
+ }
+
+ if ($upper) {
+ $upper = (int)$upper;
+ }
+
+ $options = array(
+ 'type' => 'object',
+ 'subtype' => 'blog',
+ 'full_view' => FALSE,
+ );
+
+ if ($owner_guid) {
+ $options['container_guid'] = $owner_guid;
+ }
+
+ // admin / owners can see any posts
+ // everyone else can only see published posts
+ if (!(elgg_is_admin_logged_in() || (elgg_is_logged_in() && $owner_guid == elgg_get_logged_in_user_guid()))) {
+ if ($upper > $now) {
+ $upper = $now;
+ }
+
+ $options['metadata_name_value_pairs'] = array(
+ array('name' => 'status', 'value' => 'published')
+ );
+ }
+
+ if ($lower) {
+ $options['created_time_lower'] = $lower;
+ }
+
+ if ($upper) {
+ $options['created_time_upper'] = $upper;
+ }
+
+ $list = elgg_list_entities_from_metadata($options);
+ if (!$list) {
+ $content = elgg_echo('blog:none');
+ } else {
+ $content = $list;
+ }
+
+ $title = elgg_echo('date:month:' . date('m', $lower), array(date('Y', $lower)));
+
+ return array(
+ 'content' => $content,
+ 'title' => $title,
+ 'filter' => '',
+ );
+}
+
+/**
+ * Get page components to edit/create a blog post.
+ *
+ * @param string $page 'edit' or 'new'
+ * @param int $guid GUID of blog post or container
+ * @param int $revision Annotation id for revision to edit (optional)
+ * @return array
+ */
+function blog_get_page_content_edit($page, $guid = 0, $revision = NULL) {
+
+ elgg_load_js('elgg.blog');
+
+ $return = array(
+ 'filter' => '',
+ );
+
+ $vars = array();
+ $vars['id'] = 'blog-post-edit';
+ $vars['class'] = 'elgg-form-alt';
+
+ $sidebar = '';
+ if ($page == 'edit') {
+ $blog = get_entity((int)$guid);
+
+ $title = elgg_echo('blog:edit');
+
+ if (elgg_instanceof($blog, 'object', 'blog') && $blog->canEdit()) {
+ $vars['entity'] = $blog;
+
+ $title .= ": \"$blog->title\"";
+
+ if ($revision) {
+ $revision = elgg_get_annotation_from_id((int)$revision);
+ $vars['revision'] = $revision;
+ $title .= ' ' . elgg_echo('blog:edit_revision_notice');
+
+ if (!$revision || !($revision->entity_guid == $guid)) {
+ $content = elgg_echo('blog:error:revision_not_found');
+ $return['content'] = $content;
+ $return['title'] = $title;
+ return $return;
+ }
+ }
+
+ $body_vars = blog_prepare_form_vars($blog, $revision);
+
+ elgg_push_breadcrumb($blog->title, $blog->getURL());
+ elgg_push_breadcrumb(elgg_echo('edit'));
+
+ elgg_load_js('elgg.blog');
+
+ $content = elgg_view_form('blog/save', $vars, $body_vars);
+ $sidebar = elgg_view('blog/sidebar/revisions', $vars);
+ } else {
+ $content = elgg_echo('blog:error:cannot_edit_post');
+ }
+ } else {
+ elgg_push_breadcrumb(elgg_echo('blog:add'));
+ $body_vars = blog_prepare_form_vars(null);
+
+ $title = elgg_echo('blog:add');
+ $content = elgg_view_form('blog/save', $vars, $body_vars);
+ }
+
+ $return['title'] = $title;
+ $return['content'] = $content;
+ $return['sidebar'] = $sidebar;
+ return $return;
+}
+
+/**
+ * Pull together blog variables for the save form
+ *
+ * @param ElggBlog $post
+ * @param ElggAnnotation $revision
+ * @return array
+ */
+function blog_prepare_form_vars($post = NULL, $revision = NULL) {
+
+ // input names => defaults
+ $values = array(
+ 'title' => NULL,
+ 'description' => NULL,
+ 'status' => 'published',
+ 'access_id' => ACCESS_DEFAULT,
+ 'comments_on' => 'On',
+ 'excerpt' => NULL,
+ 'tags' => NULL,
+ 'container_guid' => NULL,
+ 'guid' => NULL,
+ 'draft_warning' => '',
+ );
+
+ if ($post) {
+ foreach (array_keys($values) as $field) {
+ if (isset($post->$field)) {
+ $values[$field] = $post->$field;
+ }
+ }
+
+ if ($post->status == 'draft') {
+ $values['access_id'] = $post->future_access;
+ }
+ }
+
+ if (elgg_is_sticky_form('blog')) {
+ $sticky_values = elgg_get_sticky_values('blog');
+ foreach ($sticky_values as $key => $value) {
+ $values[$key] = $value;
+ }
+ }
+
+ elgg_clear_sticky_form('blog');
+
+ if (!$post) {
+ return $values;
+ }
+
+ // load the revision annotation if requested
+ if ($revision instanceof ElggAnnotation && $revision->entity_guid == $post->getGUID()) {
+ $values['revision'] = $revision;
+ $values['description'] = $revision->value;
+ }
+
+ // display a notice if there's an autosaved annotation
+ // and we're not editing it.
+ if ($auto_save_annotations = $post->getAnnotations('blog_auto_save', 1)) {
+ $auto_save = $auto_save_annotations[0];
+ } else {
+ $auto_save = false;
+ }
+
+ if ($auto_save && $auto_save->id != $revision->id) {
+ $values['draft_warning'] = elgg_echo('blog:messages:warning:draft');
+ }
+
+ return $values;
+}
+
+/**
+ * Forward to the new style of URLs
+ *
+ * Pre-1.7.5
+ * Group blogs page: /blog/group:<container_guid>/
+ * Group blog view: /blog/group:<container_guid>/read/<guid>/<title>
+ * 1.7.5-1.8
+ * Group blogs page: /blog/owner/group:<container_guid>/
+ * Group blog view: /blog/read/<guid>
+ *
+ *
+ * @param string $page
+ */
+function blog_url_forwarder($page) {
+
+ $viewtype = elgg_get_viewtype();
+ $qs = ($viewtype === 'default') ? "" : "?view=$viewtype";
+
+ $url = "blog/all";
+
+ // easier to work with & no notices
+ $page = array_pad($page, 4, "");
+
+ // group usernames
+ if (preg_match('~/group\:([0-9]+)/~', "/{$page[0]}/{$page[1]}/", $matches)) {
+ $guid = $matches[1];
+ $entity = get_entity($guid);
+ if (elgg_instanceof($entity, 'group')) {
+ if (!empty($page[2])) {
+ $url = "blog/view/$page[2]/";
+ } else {
+ $url = "blog/group/$guid/all";
+ }
+ register_error(elgg_echo("changebookmark"));
+ forward($url . $qs);
+ }
+ }
+
+ if (empty($page[0])) {
+ return;
+ }
+
+ // user usernames
+ $user = get_user_by_username($page[0]);
+ if (!$user) {
+ return;
+ }
+
+ if (empty($page[1])) {
+ $page[1] = 'owner';
+ }
+
+ switch ($page[1]) {
+ case "read":
+ $url = "blog/view/{$page[2]}/{$page[3]}";
+ break;
+ case "archive":
+ $url = "blog/archive/{$page[0]}/{$page[2]}/{$page[3]}";
+ break;
+ case "friends":
+ $url = "blog/friends/{$page[0]}";
+ break;
+ case "new":
+ $url = "blog/add/$user->guid";
+ break;
+ case "owner":
+ $url = "blog/owner/{$page[0]}";
+ break;
+ }
+
+ register_error(elgg_echo("changebookmark"));
+ forward($url . $qs);
+}