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<?php
/**
* Elgg river.
* Activity stream functions.
*
* @package Elgg.Core
* @subpackage SocialModel.River
*/
/**
* Adds an item to the river.
*
* @param string $view The view that will handle the river item (must exist)
* @param string $action_type An arbitrary string to define the action (eg 'comment', 'create')
* @param int $subject_guid The GUID of the entity doing the action
* @param int $object_guid The GUID of the entity being acted upon
* @param int $access_id The access ID of the river item (default: same as the object)
* @param int $posted The UNIX epoch timestamp of the river item (default: now)
* @param int $annotation_id The annotation ID associated with this river entry
*
* @return bool Depending on success
*/
function add_to_river($view, $action_type, $subject_guid, $object_guid, $access_id = "",
$posted = 0, $annotation_id = 0) {
// use default viewtype for when called from REST api
if (!elgg_view_exists($view, 'default')) {
return false;
}
if (!($subject = get_entity($subject_guid))) {
return false;
}
if (!($object = get_entity($object_guid))) {
return false;
}
if (empty($action_type)) {
return false;
}
if ($posted == 0) {
$posted = time();
}
if ($access_id === "") {
$access_id = $object->access_id;
}
$annotation_id = (int)$annotation_id;
$type = $object->getType();
$subtype = $object->getSubtype();
$action_type = sanitise_string($action_type);
// Load config
global $CONFIG;
// Attempt to save river item; return success status
$insert_data = insert_data("insert into {$CONFIG->dbprefix}river " .
" set type = '{$type}', " .
" subtype = '{$subtype}', " .
" action_type = '{$action_type}', " .
" access_id = {$access_id}, " .
" view = '{$view}', " .
" subject_guid = {$subject_guid}, " .
" object_guid = {$object_guid}, " .
" annotation_id = {$annotation_id}, " .
" posted = {$posted} ");
//update the entities which had the action carried out on it
if ($insert_data) {
update_entity_last_action($object_guid, $posted);
return $insert_data;
}
}
/**
* Removes all items relating to a particular acting entity from the river
*
* @param int $subject_guid The GUID of the entity
*
* @return bool Depending on success
*/
function remove_from_river_by_subject($subject_guid) {
// Sanitise
$subject_guid = (int) $subject_guid;
// Load config
global $CONFIG;
// Remove
return delete_data("delete from {$CONFIG->dbprefix}river where subject_guid = {$subject_guid}");
}
/**
* Removes all items relating to a particular entity being acted upon from the river
*
* @param int $object_guid The GUID of the entity
*
* @return bool Depending on success
*/
function remove_from_river_by_object($object_guid) {
// Sanitise
$object_guid = (int) $object_guid;
// Load config
global $CONFIG;
// Remove
return delete_data("delete from {$CONFIG->dbprefix}river where object_guid = {$object_guid}");
}
/**
* Removes all items relating to a particular annotation being acted upon from the river
*
* @param int $annotation_id The ID of the annotation
*
* @return bool Depending on success
* @since 1.7.0
*/
function remove_from_river_by_annotation($annotation_id) {
// Sanitise
$annotation_id = (int) $annotation_id;
// Load config
global $CONFIG;
// Remove
return delete_data("delete from {$CONFIG->dbprefix}river where annotation_id = {$annotation_id}");
}
/**
* Removes a single river entry
*
* @param int $id The ID of the river entry
*
* @return bool Depending on success
* @since 1.7.2
*/
function remove_from_river_by_id($id) {
global $CONFIG;
// Sanitise
$id = (int) $id;
return delete_data("delete from {$CONFIG->dbprefix}river where id = {$id}");
}
/**
* Get river items
*
* @param array $options
* subject_guids => INT|ARR Subject guid(s)
* object_guids => INT|ARR Object guid(s)
* annotation_ids => INT|ARR The identifier of the annotation(s)
* action_types => STR|ARR The river action type(s) identifier
* posted_time_lower => INT The lower bound on the time posted
* posted_time_upper => INT The upper bound on the time posted
*
* types => STR|ARR Entity type string(s)
* subtypes => STR|ARR Entity subtype string(s)
* type_subtype_pairs => ARR Array of type => subtype pairs where subtype
* can be an array of subtype strings
*
* relationship => STR Relationship identifier
* relationship_guid => INT|ARR Entity guid(s)
* inverse_relationship => BOOL Subject or object of the relationship (false)
*
* limit => INT Number to show per page (20)
* offset => INT Offset in list (0)
* count => BOOL Count the river items? (false)
* order_by => STR Order by clause (rv.posted desc)
* group_by => STR Group by clause
*
* @return array|int
* @since 1.8.0
*/
function elgg_get_river(array $options = array()) {
global $CONFIG;
$defaults = array(
'subject_guids' => ELGG_ENTITIES_ANY_VALUE,
'object_guids' => ELGG_ENTITIES_ANY_VALUE,
'annotation_ids' => ELGG_ENTITIES_ANY_VALUE,
'action_types' => ELGG_ENTITIES_ANY_VALUE,
'relationship' => NULL,
'relationship_guid' => NULL,
'inverse_relationship' => FALSE,
'types' => ELGG_ENTITIES_ANY_VALUE,
'subtypes' => ELGG_ENTITIES_ANY_VALUE,
'type_subtype_pairs' => ELGG_ENTITIES_ANY_VALUE,
'posted_time_lower' => ELGG_ENTITIES_ANY_VALUE,
'posted_time_upper' => ELGG_ENTITIES_ANY_VALUE,
'limit' => 20,
'offset' => 0,
'count' => FALSE,
'order_by' => 'rv.posted desc',
'group_by' => ELGG_ENTITIES_ANY_VALUE,
'wheres' => array(),
'joins' => array(),
);
$options = array_merge($defaults, $options);
$singulars = array('subject_guid', 'object_guid', 'annotation_id', 'action_type', 'type', 'subtype');
$options = elgg_normalise_plural_options_array($options, $singulars);
$wheres = $options['wheres'];
$wheres[] = elgg_get_guid_based_where_sql('rv.subject_guid', $options['subject_guids']);
$wheres[] = elgg_get_guid_based_where_sql('rv.object_guid', $options['object_guids']);
$wheres[] = elgg_get_guid_based_where_sql('rv.annotation_id', $options['annotation_ids']);
$wheres[] = elgg_river_get_action_where_sql($options['action_types']);
$wheres[] = elgg_get_river_type_subtype_where_sql('rv', $options['types'],
$options['subtypes'], $options['type_subtype_pairs']);
if ($options['posted_time_lower'] && is_int($options['posted_time_lower'])) {
$wheres[] = "rv.posted >= {$options['posted_time_lower']}";
}
if ($options['posted_time_upper'] && is_int($options['posted_time_upper'])) {
$wheres[] = "rv.posted <= {$options['posted_time_upper']}";
}
$joins = $options['joins'];
if ($options['relationship_guid']) {
$clauses = elgg_get_entity_relationship_where_sql(
'rv.subject_guid',
$options['relationship'],
$options['relationship_guid'],
$options['inverse_relationship']);
if ($clauses) {
$wheres = array_merge($wheres, $clauses['wheres']);
$joins = array_merge($joins, $clauses['joins']);
}
}
// remove identical where clauses
$wheres = array_unique($wheres);
// see if any functions failed
// remove empty strings on successful functions
foreach ($wheres as $i => $where) {
if ($where === FALSE) {
return FALSE;
} elseif (empty($where)) {
unset($wheres[$i]);
}
}
if (!$options['count']) {
$query = "SELECT DISTINCT rv.* FROM {$CONFIG->dbprefix}river rv ";
} else {
$query = "SELECT count(DISTINCT rv.id) as total FROM {$CONFIG->dbprefix}river rv ";
}
// add joins
foreach ($joins as $j) {
$query .= " $j ";
}
// add wheres
$query .= ' WHERE ';
foreach ($wheres as $w) {
$query .= " $w AND ";
}
$query .= elgg_river_get_access_sql();
if (!$options['count']) {
$options['group_by'] = sanitise_string($options['group_by']);
if ($options['group_by']) {
$query .= " GROUP BY {$options['group_by']}";
}
$options['order_by'] = sanitise_string($options['order_by']);
$query .= " ORDER BY {$options['order_by']}";
if ($options['limit']) {
$limit = sanitise_int($options['limit']);
$offset = sanitise_int($options['offset']);
$query .= " LIMIT $offset, $limit";
}
$river_items = get_data($query, 'elgg_row_to_elgg_river_item');
return $river_items;
} else {
$total = get_data_row($query);
return (int)$total->total;
}
}
/**
* List river items
*
* @param array $options Any options from elgg_get_river() plus:
* pagination => BOOL Display pagination links (true)
* @return string
* @since 1.8.0
*/
function elgg_list_river(array $options = array()) {
$defaults = array(
'offset' => (int) max(get_input('offset', 0), 0),
'limit' => (int) max(get_input('limit', 20), 0),
'pagination' => TRUE,
'list_class' => 'elgg-river',
);
$options = array_merge($defaults, $options);
$options['count'] = TRUE;
$count = elgg_get_river($options);
$options['count'] = FALSE;
$items = elgg_get_river($options);
$options['count'] = $count;
$options['items'] = $items;
return elgg_view('layout/objects/list', $options);
}
/**
* Convert a database row to a new ElggRiverItem
*
* @param stdClass $row Database row from the river table
*
* @return ElggRiverItem
* @since 1.8.0
* @access private
*/
function elgg_row_to_elgg_river_item($row) {
if (!($row instanceof stdClass)) {
return NULL;
}
return new ElggRiverItem($row);
}
/**
* Get the river's access where clause
*
* @return string
* @since 1.8.0
* @access private
*/
function elgg_river_get_access_sql() {
// rewrite default access where clause to work with river table
return str_replace("and enabled='yes'", '',
str_replace('owner_guid', 'subject_guid', get_access_sql_suffix()));
}
/**
* Returns SQL where clause for type and subtype on river table
*
* @internal This is a simplified version of elgg_get_entity_type_subtype_where_sql()
* which could be used for all queries once the subtypes have been denormalized.
* FYI: It allows types and subtypes to not be paired.
*
* @param string $table 'rv'
* @param NULL|array $types Array of types or NULL if none.
* @param NULL|array $subtypes Array of subtypes or NULL if none
* @param NULL|array $pairs Array of pairs of types and subtypes
*
* @return string
* @since 1.8.0
* @access private
*/
function elgg_get_river_type_subtype_where_sql($table, $types, $subtypes, $pairs) {
// short circuit if nothing is requested
if (!$types && !$subtypes && !$pairs) {
return '';
}
$wheres = array();
// if no pairs, use types and subtypes
if (!is_array($pairs)) {
if ($types) {
if (!is_array($types)) {
$types = array($types);
}
foreach ($types as $type) {
$type = sanitise_string($type);
$wheres[] = "({$table}.type = '$type')";
}
}
if ($subtypes) {
if (!is_array($subtypes)) {
$subtypes = array($subtypes);
}
foreach ($subtypes as $subtype) {
$subtype = sanitise_string($subtype);
$wheres[] = "({$table}.subtype = '$subtype')";
}
}
if (is_array($wheres) && count($wheres)) {
$wheres = array(implode(' AND ', $wheres));
}
} else {
// using type/subtype pairs
foreach ($pairs as $paired_type => $paired_subtypes) {
$paired_type = sanitise_string($paired_type);
if (is_array($paired_subtypes)) {
$paired_subtypes = array_map('sanitise_string', $paired_subtypes);
$paired_subtype_str = implode("','", $paired_subtypes);
if ($paired_subtype_str) {
$wheres[] = "({$table}.type = '$paired_type'"
. " AND {$table}.subtype IN ('$paired_subtype_str'))";
}
} else {
$paired_subtype = sanitise_string($paired_subtypes);
$wheres[] = "({$table}.type = '$paired_type'"
. " AND {$table}.subtype = '$paired_subtype')";
}
}
}
if (is_array($wheres) && count($wheres)) {
$where = implode(' OR ', $wheres);
return "($where)";
}
return '';
}
/**
* Get the where clause based on river action type strings
*
* @param array $types Array of action type strings
*
* @return string
* @since 1.8.0
* @access private
*/
function elgg_river_get_action_where_sql($types) {
if (!$types) {
return '';
}
if (!is_array($types)) {
$types = sanitise_string($types);
return "'(rv.action_type = '$types')";
}
// sanitize types array
$types_sanitized = array();
foreach ($types as $type) {
$types_sanitized[] = sanitise_string($type);
}
$type_str = implode("','", $types_sanitized);
return "(rv.action_type IN ('$type_str'))";
}
/**
* Returns a human-readable representation of a river item
*
* @param ElggRiverItem $item A river item object
*
* @return string|false Depending on success
*/
function elgg_view_river_item($item) {
if (!$item || !$item->getView() || !elgg_view_exists($item->getView())) {
return '';
}
$subject = $item->getSubjectEntity();
$object = $item->getObjectEntity();
if (!$subject || !$object) {
// subject is disabled or subject/object deleted
return '';
}
$vars = array(
'pict' => elgg_view('core/river/image', array('item' => $item)),
'body' => elgg_view('core/river/body', array('item' => $item)),
'pict_alt' => elgg_view('core/river/controls', array('item' => $item)),
'class' => 'elgg-river-item',
);
return elgg_view('layout/objects/image_block', $vars);
}
/**
* Sets the access ID on river items for a particular object
*
* @param int $object_guid The GUID of the entity
* @param int $access_id The access ID
*
* @return bool Depending on success
*/
function update_river_access_by_object($object_guid, $access_id) {
// Sanitise
$object_guid = (int) $object_guid;
$access_id = (int) $access_id;
// Load config
global $CONFIG;
// Remove
$query = "update {$CONFIG->dbprefix}river
set access_id = {$access_id}
where object_guid = {$object_guid}";
return update_data($query);
}
/**
* Retrieves items from the river. All parameters are optional.
*
* @param int|array $subject_guid Acting entity to restrict to. Default: all
* @param int|array $object_guid Entity being acted on to restrict to. Default: all
* @param string $subject_relationship If set to a relationship type, this will use
* $subject_guid as the starting point and set the
* subjects to be all users this
* entity has this relationship with (eg 'friend').
* Default: blank
* @param string $type The type of entity to restrict to. Default: all
* @param string $subtype The subtype of entity to restrict to. Default: all
* @param string $action_type The type of river action to restrict to. Default: all
* @param int $limit The number of items to retrieve. Default: 20
* @param int $offset The page offset. Default: 0
* @param int $posted_min The minimum time period to look at. Default: none
* @param int $posted_max The maximum time period to look at. Default: none
*
* @return array|false Depending on success
* @deprecated 1.8
*/
function get_river_items($subject_guid = 0, $object_guid = 0, $subject_relationship = '',
$type = '', $subtype = '', $action_type = '', $limit = 20, $offset = 0, $posted_min = 0,
$posted_max = 0) {
elgg_deprecated_notice("get_river_items deprecated by elgg_get_river", 1.8);
$options = array();
if ($subject_guid) {
$options['subject_guid'] = $subject_guid;
}
if ($object_guid) {
$options['object_guid'] = $object_guid;
}
if ($subject_relationship) {
$options['relationship'] = $subject_relationship;
unset($options['subject_guid']);
$options['relationship_guid'] = $subject_guid;
}
if ($type) {
$options['type'] = $type;
}
if ($subtype) {
$options['subtype'] = $subtype;
}
if ($action_type) {
$options['action_type'] = $action_type;
}
$options['limit'] = $limit;
$options['offset'] = $offset;
if ($posted_min) {
$options['posted_time_lower'] = $posted_min;
}
if ($posted_max) {
$options['posted_time_upper'] = $posted_max;
}
return elgg_get_river($options);
}
/**
* Returns a human-readable version of the river.
*
* @param int|array $subject_guid Acting entity to restrict to. Default: all
* @param int|array $object_guid Entity being acted on to restrict to. Default: all
* @param string $subject_relationship If set to a relationship type, this will use
* $subject_guid as the starting point and set
* the subjects to be all users this entity has this
* relationship with (eg 'friend'). Default: blank
* @param string $type The type of entity to restrict to. Default: all
* @param string $subtype The subtype of entity to restrict to. Default: all
* @param string $action_type The type of river action to restrict to. Default: all
* @param int $limit The number of items to retrieve. Default: 20
* @param int $posted_min The minimum time period to look at. Default: none
* @param int $posted_max The maximum time period to look at. Default: none
* @param bool $pagination Show pagination?
*
* @return string Human-readable river.
* @deprecated 1.8
*/
function elgg_view_river_items($subject_guid = 0, $object_guid = 0, $subject_relationship = '',
$type = '', $subtype = '', $action_type = '', $limit = 20, $posted_min = 0,
$posted_max = 0, $pagination = true) {
elgg_deprecated_notice("elgg_view_river_items deprecated for elgg_list_river", 1.8);
$river_items = get_river_items($subject_guid, $object_guid, $subject_relationship,
$type, $subtype, $action_type, $limit + 1, $posted_min, $posted_max);
// Get input from outside world and sanitise it
$offset = (int) get_input('offset', 0);
// view them
$params = array(
'items' => $river_items,
'count' => count($river_items),
'offset' => $offset,
'limit' => $limit,
'pagination' => $pagination,
'list-class' => 'elgg-river-list',
);
return elgg_view('layout/objects/list', $params);
}
/**
* Construct and execute the query required for the activity stream.
*
* @deprecated 1.8
*/
function get_activity_stream_data($limit = 10, $offset = 0, $type = "", $subtype = "",
$owner_guid = "", $owner_relationship = "") {
elgg_deprecated_notice("get_activity_stream_data was deprecated", 1.8);
global $CONFIG;
$limit = (int)$limit;
$offset = (int)$offset;
if ($type) {
if (!is_array($type)) {
$type = array(sanitise_string($type));
} else {
foreach ($type as $k => $v) {
$type[$k] = sanitise_string($v);
}
}
}
if ($subtype) {
if (!is_array($subtype)) {
$subtype = array(sanitise_string($subtype));
} else {
foreach ($subtype as $k => $v) {
$subtype[$k] = sanitise_string($v);
}
}
}
if ($owner_guid) {
if (is_array($owner_guid)) {
foreach ($owner_guid as $k => $v) {
$owner_guid[$k] = (int)$v;
}
} else {
$owner_guid = array((int)$owner_guid);
}
}
$owner_relationship = sanitise_string($owner_relationship);
// Get a list of possible views
$activity_events = array();
$activity_views = array_merge(elgg_view_tree('activity', 'default'),
elgg_view_tree('river', 'default'));
$done = array();
foreach ($activity_views as $view) {
$fragments = explode('/', $view);
$tmp = explode('/', $view, 2);
$tmp = $tmp[1];
if ((isset($fragments[0])) && (($fragments[0] == 'river') || ($fragments[0] == 'activity'))
&& (!in_array($tmp, $done))) {
if (isset($fragments[1])) {
$f = array();
for ($n = 1; $n < count($fragments); $n++) {
$val = sanitise_string($fragments[$n]);
switch($n) {
case 1: $key = 'type'; break;
case 2: $key = 'subtype'; break;
case 3: $key = 'event'; break;
}
$f[$key] = $val;
}
// Filter result based on parameters
$add = true;
if ($type) {
if (!in_array($f['type'], $type)) {
$add = false;
}
}
if (($add) && ($subtype)) {
if (!in_array($f['subtype'], $subtype)) {
$add = false;
}
}
if (($add) && ($event)) {
if (!in_array($f['event'], $event)) {
$add = false;
}
}
if ($add) {
$activity_events[] = $f;
}
}
$done[] = $tmp;
}
}
$n = 0;
foreach ($activity_events as $details) {
// Get what we're talking about
if ($details['subtype'] == 'default') {
$details['subtype'] = '';
}
if (($details['type']) && ($details['event'])) {
if ($n > 0) {
$obj_query .= " or ";
}
$access = "";
if ($details['type'] != 'relationship') {
$access = " and " . get_access_sql_suffix('sl');
}
$obj_query .= "( sl.object_type='{$details['type']}'
AND sl.object_subtype='{$details['subtype']}'
AND sl.event='{$details['event']}' $access )";
$n++;
}
}
// User
if ((count($owner_guid)) && ($owner_guid[0] != 0)) {
$user = " and sl.performed_by_guid in (" . implode(',', $owner_guid) . ")";
if ($owner_relationship) {
$friendsarray = "";
if ($friends = elgg_get_entities_from_relationship(array(
'relationship' => $owner_relationship,
'relationship_guid' => $owner_guid[0],
'inverse_relationship' => FALSE,
'types' => 'user',
'subtypes' => $subtype,
'limit' => 9999))
) {
$friendsarray = array();
foreach ($friends as $friend) {
$friendsarray[] = $friend->getGUID();
}
$user = " and sl.performed_by_guid in (" . implode(',', $friendsarray) . ")";
}
}
}
$query = "SELECT sl.* FROM {$CONFIG->dbprefix}system_log sl
WHERE 1 $user AND ($obj_query)
ORDER BY sl.time_created desc limit $offset, $limit";
return get_data($query);
}
/**
* Page handler for activiy
*
* @param array $page
*/
function elgg_river_page_handler($page) {
global $CONFIG;
elgg_set_page_owner_guid(get_loggedin_userid());
$page_type = elgg_get_array_value(0, $page, 'all');
if ($page_type == 'owner') {
$page_type = 'mine';
}
// content filter code here
$entity_type = '';
$entity_subtype = '';
require_once("{$CONFIG->path}pages/river.php");
}
/**
* Initialize river library
*/
function elgg_river_init() {
register_page_handler('activity', 'elgg_river_page_handler');
$item = new ElggMenuItem('activity', elgg_echo('activity'), 'pg/activity');
elgg_register_menu_item('site', $item);
}
elgg_register_event_handler('init', 'system', 'elgg_river_init');
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