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-rw-r--r--engine/lib/relationships.php1192
1 files changed, 614 insertions, 578 deletions
diff --git a/engine/lib/relationships.php b/engine/lib/relationships.php
index e60e19fdf..b0cd627fc 100644
--- a/engine/lib/relationships.php
+++ b/engine/lib/relationships.php
@@ -1,607 +1,643 @@
<?php
- /**
- * Elgg relationships.
- * Stub containing relationship functions, making import and export easier.
- *
- * @package Elgg
- * @subpackage Core
- * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
- * @author Marcus Povey <marcus@dushka.co.uk>
- * @copyright Curverider Ltd 2008
- * @link http://elgg.org/
- */
-
- /**
- * Relationship class.
- *
- * @author Marcus Povey
- * @package Elgg
- * @subpackage Core
- */
- class ElggRelationship implements
- Importable,
- Exportable,
- Loggable, // Can events related to this object class be logged
- Iterator, // Override foreach behaviour
- ArrayAccess // Override for array access
- {
- /**
- * This contains the site's main properties (id, etc)
- * @var array
- */
- protected $attributes;
-
- /**
- * Construct a new site object, optionally from a given id value or row.
- *
- * @param mixed $id
- */
- function __construct($id = null)
- {
- $this->attributes = array();
-
- if (!empty($id)) {
-
- if ($id instanceof stdClass)
- $relationship = $id; // Create from db row
- else
- $relationship = get_relationship($id);
-
- if ($relationship) {
- $objarray = (array) $relationship;
- foreach($objarray as $key => $value) {
- $this->attributes[$key] = $value;
- }
- }
- }
- }
-
- /**
- * Class member get overloading
- *
- * @param string $name
- * @return mixed
- */
- protected function __get($name) {
- if (isset($this->attributes[$name]))
- return $this->attributes[$name];
-
- return null;
- }
-
- /**
- * Class member set overloading
- *
- * @param string $name
- * @param mixed $value
- * @return mixed
- */
- protected function __set($name, $value) {
- $this->attributes[$name] = $value;
+/**
+ * Elgg relationships.
+ * Stub containing relationship functions, making import and export easier.
+ *
+ * @package Elgg.Core
+ * @subpackage DataModel.Relationship
+ */
+
+/**
+ * Convert a database row to a new ElggRelationship
+ *
+ * @param stdClass $row Database row from the relationship table
+ *
+ * @return ElggRelationship|stdClass
+ * @access private
+ */
+function row_to_elggrelationship($row) {
+ if (!($row instanceof stdClass)) {
+ return $row;
+ }
+
+ return new ElggRelationship($row);
+}
+
+/**
+ * Return a relationship.
+ *
+ * @param int $id The ID of a relationship
+ *
+ * @return ElggRelationship|false
+ */
+function get_relationship($id) {
+ global $CONFIG;
+
+ $id = (int)$id;
+
+ $query = "SELECT * from {$CONFIG->dbprefix}entity_relationships where id=$id";
+ return row_to_elggrelationship(get_data_row($query));
+}
+
+/**
+ * Delete a specific relationship.
+ *
+ * @param int $id The relationship ID
+ *
+ * @return bool
+ */
+function delete_relationship($id) {
+ global $CONFIG;
+
+ $id = (int)$id;
+
+ $relationship = get_relationship($id);
+
+ if (elgg_trigger_event('delete', 'relationship', $relationship)) {
+ return delete_data("delete from {$CONFIG->dbprefix}entity_relationships where id=$id");
+ }
+
+ return FALSE;
+}
+
+/**
+ * Define an arbitrary relationship between two entities.
+ * This relationship could be a friendship, a group membership or a site membership.
+ *
+ * This function lets you make the statement "$guid_one is a $relationship of $guid_two".
+ *
+ * @param int $guid_one First GUID
+ * @param string $relationship Relationship name
+ * @param int $guid_two Second GUID
+ *
+ * @return bool
+ */
+function add_entity_relationship($guid_one, $relationship, $guid_two) {
+ global $CONFIG;
+
+ $guid_one = (int)$guid_one;
+ $relationship = sanitise_string($relationship);
+ $guid_two = (int)$guid_two;
+ $time = time();
+
+ // Check for duplicates
+ if (check_entity_relationship($guid_one, $relationship, $guid_two)) {
+ return false;
+ }
+
+ $result = insert_data("INSERT into {$CONFIG->dbprefix}entity_relationships
+ (guid_one, relationship, guid_two, time_created)
+ values ($guid_one, '$relationship', $guid_two, $time)");
+
+ if ($result !== false) {
+ $obj = get_relationship($result);
+ if (elgg_trigger_event('create', $relationship, $obj)) {
return true;
+ } else {
+ delete_relationship($result);
}
+ }
+
+ return false;
+}
+
+/**
+ * Determine if a relationship between two entities exists
+ * and returns the relationship object if it does
+ *
+ * @param int $guid_one The GUID of the entity "owning" the relationship
+ * @param string $relationship The type of relationship
+ * @param int $guid_two The GUID of the entity the relationship is with
+ *
+ * @return ElggRelationship|false Depending on success
+ */
+function check_entity_relationship($guid_one, $relationship, $guid_two) {
+ global $CONFIG;
+
+ $guid_one = (int)$guid_one;
+ $relationship = sanitise_string($relationship);
+ $guid_two = (int)$guid_two;
+
+ $query = "SELECT * FROM {$CONFIG->dbprefix}entity_relationships
+ WHERE guid_one=$guid_one
+ AND relationship='$relationship'
+ AND guid_two=$guid_two limit 1";
+
+ $row = row_to_elggrelationship(get_data_row($query));
+ if ($row) {
+ return $row;
+ }
+
+ return false;
+}
+
+/**
+ * Remove an arbitrary relationship between two entities.
+ *
+ * @param int $guid_one First GUID
+ * @param string $relationship Relationship name
+ * @param int $guid_two Second GUID
+ *
+ * @return bool
+ */
+function remove_entity_relationship($guid_one, $relationship, $guid_two) {
+ global $CONFIG;
+
+ $guid_one = (int)$guid_one;
+ $relationship = sanitise_string($relationship);
+ $guid_two = (int)$guid_two;
+
+ $obj = check_entity_relationship($guid_one, $relationship, $guid_two);
+ if ($obj == false) {
+ return false;
+ }
+
+ if (elgg_trigger_event('delete', $relationship, $obj)) {
+ $query = "DELETE from {$CONFIG->dbprefix}entity_relationships
+ where guid_one=$guid_one
+ and relationship='$relationship'
+ and guid_two=$guid_two";
+
+ return (bool)delete_data($query);
+ } else {
+ return false;
+ }
+}
- /**
- * Save the relationship
- *
- * @return int the relationship id
- */
- public function save()
- {
- if ($this->id > 0)
- {
- delete_relationship($this->id);
- }
-
- $this->id = add_entity_relationship($this->guid_one, $this->relationship, $this->guid_two);
- if (!$this->id) throw new IOException(sprintf(elgg_new('IOException:UnableToSaveNew'), get_class()));
-
- return $this->id;
-
+/**
+ * Removes all arbitrary relationships originating from a particular entity
+ *
+ * @param int $guid_one The GUID of the entity
+ * @param string $relationship The name of the relationship (optional)
+ * @param bool $inverse Whether we're deleting inverse relationships (default false)
+ * @param string $type The type of entity to the delete to (defaults to all)
+ *
+ * @return bool Depending on success
+ */
+function remove_entity_relationships($guid_one, $relationship = "", $inverse = false, $type = '') {
+ global $CONFIG;
+
+ $guid_one = (int) $guid_one;
+
+ if (!empty($relationship)) {
+ $relationship = sanitise_string($relationship);
+ $where = "and er.relationship='$relationship'";
+ } else {
+ $where = "";
+ }
+
+ if (!empty($type)) {
+ $type = sanitise_string($type);
+ if (!$inverse) {
+ $join = " join {$CONFIG->dbprefix}entities e on e.guid = er.guid_two ";
+ } else {
+ $join = " join {$CONFIG->dbprefix}entities e on e.guid = er.guid_one ";
+ $where .= " and ";
}
-
- /**
- * Delete a given relationship.
- */
- public function delete()
- {
- return delete_relationship($this->id);
+ $where .= " and e.type = '{$type}' ";
+ } else {
+ $join = "";
+ }
+
+ if (!$inverse) {
+ $sql = "DELETE er from {$CONFIG->dbprefix}entity_relationships as er
+ {$join}
+ where guid_one={$guid_one} {$where}";
+
+ return delete_data($sql);
+ } else {
+ $sql = "DELETE er from {$CONFIG->dbprefix}entity_relationships as er
+ {$join} where
+ guid_two={$guid_one} {$where}";
+
+ return delete_data($sql);
+ }
+}
+
+/**
+ * Get all the relationships for a given guid.
+ *
+ * @param int $guid The GUID of the relationship owner
+ * @param bool $inverse_relationship Inverse relationship owners?
+ *
+ * @return ElggRelationship[]
+ */
+function get_entity_relationships($guid, $inverse_relationship = FALSE) {
+ global $CONFIG;
+
+ $guid = (int)$guid;
+
+ $where = ($inverse_relationship ? "guid_two='$guid'" : "guid_one='$guid'");
+
+ $query = "SELECT * from {$CONFIG->dbprefix}entity_relationships where {$where}";
+
+ return get_data($query, "row_to_elggrelationship");
+}
+
+/**
+ * Return entities matching a given query joining against a relationship.
+ * Also accepts all options available to elgg_get_entities() and
+ * elgg_get_entities_from_metadata().
+ *
+ * To ask for entities that do not have a particulat relationship to an entity,
+ * use a custom where clause like the following:
+ *
+ * $options['wheres'][] = "NOT EXISTS (
+ * SELECT 1 FROM {$db_prefix}entity_relationships
+ * WHERE guid_one = e.guid
+ * AND relationship = '$relationship'
+ * )";
+ *
+ * @see elgg_get_entities
+ * @see elgg_get_entities_from_metadata
+ *
+ * @param array $options Array in format:
+ *
+ * relationship => NULL|STR relationship
+ *
+ * relationship_guid => NULL|INT Guid of relationship to test
+ *
+ * inverse_relationship => BOOL Inverse the relationship
+ *
+ * @return ElggEntity[]|mixed If count, int. If not count, array. false on errors.
+ * @since 1.7.0
+ */
+function elgg_get_entities_from_relationship($options) {
+ $defaults = array(
+ 'relationship' => NULL,
+ 'relationship_guid' => NULL,
+ 'inverse_relationship' => FALSE
+ );
+
+ $options = array_merge($defaults, $options);
+
+ $clauses = elgg_get_entity_relationship_where_sql('e.guid', $options['relationship'],
+ $options['relationship_guid'], $options['inverse_relationship']);
+
+ if ($clauses) {
+ // merge wheres to pass to get_entities()
+ if (isset($options['wheres']) && !is_array($options['wheres'])) {
+ $options['wheres'] = array($options['wheres']);
+ } elseif (!isset($options['wheres'])) {
+ $options['wheres'] = array();
}
-
- // EXPORTABLE INTERFACE ////////////////////////////////////////////////////////////
-
- /**
- * Export this relationship
- *
- * @return array
- */
- public function export()
- {
- return new ODDRelationship(
- guid_to_uuid($this->guid_one),
- $this->relationship,
- guid_to_uuid($this->guid_two)
- );
+
+ $options['wheres'] = array_merge($options['wheres'], $clauses['wheres']);
+
+ // merge joins to pass to get_entities()
+ if (isset($options['joins']) && !is_array($options['joins'])) {
+ $options['joins'] = array($options['joins']);
+ } elseif (!isset($options['joins'])) {
+ $options['joins'] = array();
}
-
- // IMPORTABLE INTERFACE ////////////////////////////////////////////////////////////
-
- /**
- * Import a relationship
- *
- * @param array $data
- * @param int $version
- * @return ElggRelationship
- * @throws ImportException
- */
- public function import(ODD $data)
- {
- if (!($element instanceof ODDRelationship))
- throw new InvalidParameterException(elgg_echo('InvalidParameterException:UnexpectedODDClass'));
-
- $uuid_one = $data->getAttribute('uuid1');
- $uuid_two = $data->getAttribute('uuid2');
-
- // See if this entity has already been imported, if so then we need to link to it
- $entity1 = get_entity_from_uuid($uuid_one);
- $entity2 = get_entity_from_uuid($uuid_two);
- if (($entity1) && ($entity2))
- {
- // Set the item ID
- $this->attributes['guid_one'] = $entity1->getGUID();
- $this->attributes['guid_two'] = $entity2->getGUID();
-
- // Map verb to relationship
- //$verb = $data->getAttribute('verb');
- //$relationship = get_relationship_from_verb($verb);
- $relationship = $data->getAttribute('type');
-
- if ($relationship)
- {
- $this->attributes['relationship'] = $relationship;
- // save
- $result = $this->save();
- if (!$result)
- throw new ImportException(sprintf(elgg_echo('ImportException:ProblemSaving'), get_class()));
-
- return $this;
- }
- }
+
+ $options['joins'] = array_merge($options['joins'], $clauses['joins']);
+
+ if (isset($options['selects']) && !is_array($options['selects'])) {
+ $options['selects'] = array($options['selects']);
+ } elseif (!isset($options['selects'])) {
+ $options['selects'] = array();
}
-
- // SYSTEM LOG INTERFACE ////////////////////////////////////////////////////////////
-
- /**
- * Return an identification for the object for storage in the system log.
- * This id must be an integer.
- *
- * @return int
- */
- public function getSystemLogID() { return $this->id; }
-
- /**
- * Return the class name of the object.
- */
- public function getClassName() { return get_class($this); }
-
- /**
- * For a given ID, return the object associated with it.
- * This is used by the river functionality primarily.
- * This is useful for checking access permissions etc on objects.
- */
- public function getObjectFromID($id) { return get_relationship($id); }
-
- /**
- * Return the GUID of the owner of this object.
- */
- public function getObjectOwnerGUID() { return $this->owner_guid; }
-
- // ITERATOR INTERFACE //////////////////////////////////////////////////////////////
- /*
- * This lets an entity's attributes be displayed using foreach as a normal array.
- * Example: http://www.sitepoint.com/print/php5-standard-library
- */
-
- private $valid = FALSE;
-
- function rewind()
- {
- $this->valid = (FALSE !== reset($this->attributes));
- }
-
- function current()
- {
- return current($this->attributes);
- }
-
- function key()
- {
- return key($this->attributes);
- }
-
- function next()
- {
- $this->valid = (FALSE !== next($this->attributes));
- }
-
- function valid()
- {
- return $this->valid;
- }
-
- // ARRAY ACCESS INTERFACE //////////////////////////////////////////////////////////
- /*
- * This lets an entity's attributes be accessed like an associative array.
- * Example: http://www.sitepoint.com/print/php5-standard-library
- */
-
- function offsetSet($key, $value)
- {
- if ( array_key_exists($key, $this->attributes) ) {
- $this->attributes[$key] = $value;
- }
- }
-
- function offsetGet($key)
- {
- if ( array_key_exists($key, $this->attributes) ) {
- return $this->attributes[$key];
- }
- }
-
- function offsetUnset($key)
- {
- if ( array_key_exists($key, $this->attributes) ) {
- $this->attributes[$key] = ""; // Full unsetting is dangerious for our objects
- }
- }
-
- function offsetExists($offset)
- {
- return array_key_exists($offset, $this->attributes);
- }
- }
-
-
- /**
- * Convert a database row to a new ElggRelationship
- *
- * @param stdClass $row
- * @return stdClass or ElggMetadata
- */
- function row_to_elggrelationship($row)
- {
- if (!($row instanceof stdClass))
- return $row;
-
- return new ElggRelationship($row);
+
+ $select = array('r.id');
+
+ $options['selects'] = array_merge($options['selects'], $select);
}
-
- /**
- * Return a relationship.
- *
- * @param int $id
- */
- function get_relationship($id)
- {
- global $CONFIG;
-
- $id = (int)$id;
-
- return row_to_elggrelationship(get_data_row("SELECT * from {$CONFIG->dbprefix}entity_relationships where id=$id"));
+
+ return elgg_get_entities_from_metadata($options);
+}
+
+/**
+ * Returns sql appropriate for relationship joins and wheres
+ *
+ * @todo add support for multiple relationships and guids.
+ *
+ * @param string $column Column name the guid should be checked against.
+ * Provide in table.column format.
+ * @param string $relationship Relationship string
+ * @param int $relationship_guid Entity guid to check
+ * @param bool $inverse_relationship Inverse relationship check?
+ *
+ * @return mixed
+ * @since 1.7.0
+ * @access private
+ */
+function elgg_get_entity_relationship_where_sql($column, $relationship = NULL,
+$relationship_guid = NULL, $inverse_relationship = FALSE) {
+
+ if ($relationship == NULL && $relationship_guid == NULL) {
+ return '';
}
-
- /**
- * Delete a specific relationship.
- *
- * @param int $id
- */
- function delete_relationship($id)
- {
- global $CONFIG;
-
- $id = (int)$id;
-
- return row_to_elggrelationship(get_data_row("delete from {$CONFIG->dbprefix}entity_relationships where id=$id"));
+
+ global $CONFIG;
+
+ $wheres = array();
+ $joins = array();
+
+ if ($inverse_relationship) {
+ $joins[] = "JOIN {$CONFIG->dbprefix}entity_relationships r on r.guid_one = $column";
+ } else {
+ $joins[] = "JOIN {$CONFIG->dbprefix}entity_relationships r on r.guid_two = $column";
}
-
- /**
- * Define an arbitrary relationship between two entities.
- * This relationship could be a friendship, a group membership or a site membership.
- *
- * This function lets you make the statement "$guid_one has $relationship with $guid_two".
- *
- * TODO: Access controls? Are they necessary - I don't think so since we are defining
- * relationships between and anyone can do that. The objects should patch some access
- * controls over the top tho.
- *
- * @param int $guid_one
- * @param string $relationship
- * @param int $guid_two
- */
- function add_entity_relationship($guid_one, $relationship, $guid_two)
- {
- global $CONFIG;
-
- $guid_one = (int)$guid_one;
- $relationship = sanitise_string($relationship);
- $guid_two = (int)$guid_two;
-
- return insert_data("INSERT into {$CONFIG->dbprefix}entity_relationships (guid_one, relationship, guid_two) values ($guid_one, '$relationship', $guid_two)");
+
+ if ($relationship) {
+ $wheres[] = "r.relationship = '" . sanitise_string($relationship) . "'";
}
-
- /**
- * Determine whether or not a relationship between two entities exists
- *
- * @param int $guid_one The GUID of the entity "owning" the relationship
- * @param string $relationship The type of relationship
- * @param int $guid_two The GUID of the entity the relationship is with
- * @return true|false
- */
- function check_entity_relationship($guid_one, $relationship, $guid_two)
- {
- global $CONFIG;
-
- $guid_one = (int)$guid_one;
- $relationship = sanitise_string($relationship);
- $guid_two = (int)$guid_two;
-
- if ($row = get_data_row("select guid_one from {$CONFIG->dbprefix}entity_relationships where guid_one=$guid_one and relationship='$relationship' and guid_two=$guid_two limit 1")) {
- return true;
+
+ if ($relationship_guid) {
+ if ($inverse_relationship) {
+ $wheres[] = "r.guid_two = '$relationship_guid'";
+ } else {
+ $wheres[] = "r.guid_one = '$relationship_guid'";
}
+ }
+
+ if ($where_str = implode(' AND ', $wheres)) {
+
+ return array('wheres' => array("($where_str)"), 'joins' => $joins);
+ }
+
+ return '';
+}
+
+/**
+ * Returns a viewable list of entities by relationship
+ *
+ * @param array $options Options array for retrieval of entities
+ *
+ * @see elgg_list_entities()
+ * @see elgg_get_entities_from_relationship()
+ *
+ * @return string The viewable list of entities
+ */
+function elgg_list_entities_from_relationship(array $options = array()) {
+ return elgg_list_entities($options, 'elgg_get_entities_from_relationship');
+}
+
+/**
+ * Gets the number of entities by a the number of entities related to them in a particular way.
+ * This is a good way to get out the users with the most friends, or the groups with the
+ * most members.
+ *
+ * @param array $options An options array compatible with
+ * elgg_get_entities_from_relationship()
+ * @return ElggEntity[]|mixed int If count, int. If not count, array. false on errors.
+ * @since 1.8.0
+ */
+function elgg_get_entities_from_relationship_count(array $options = array()) {
+ $options['selects'][] = "COUNT(e.guid) as total";
+ $options['group_by'] = 'r.guid_two';
+ $options['order_by'] = 'total desc';
+ return elgg_get_entities_from_relationship($options);
+}
+
+/**
+ * Returns a list of entities by relationship count
+ *
+ * @see elgg_get_entities_from_relationship_count()
+ *
+ * @param array $options Options array
+ *
+ * @return string
+ * @since 1.8.0
+ */
+function elgg_list_entities_from_relationship_count($options) {
+ return elgg_list_entities($options, 'elgg_get_entities_from_relationship_count');
+}
+
+/**
+ * Sets the URL handler for a particular relationship type
+ *
+ * @param string $relationship_type The relationship type.
+ * @param string $function_name The function to register
+ *
+ * @return bool Depending on success
+ */
+function elgg_register_relationship_url_handler($relationship_type, $function_name) {
+ global $CONFIG;
+
+ if (!is_callable($function_name, true)) {
return false;
}
- /**
- * Remove an arbitrary relationship between two entities.
- *
- * @param int $guid_one
- * @param string $relationship
- * @param int $guid_two
- */
- function remove_entity_relationship($guid_one, $relationship, $guid_two)
- {
- global $CONFIG;
-
- $guid_one = (int)$guid_one;
- $relationship = sanitise_string($relationship);
- $guid_two = (int)$guid_two;
-
- return delete_data("DELETE from {$CONFIG->dbprefix}entity_relationships where guid_one=$guid_one and relationship='$relationship' and guid_two=$guid_two");
+ if (!isset($CONFIG->relationship_url_handler)) {
+ $CONFIG->relationship_url_handler = array();
}
- /**
- * Removes all arbitrary relationships originating from a particular entity
- *
- * @param int $guid_one The GUID of the entity
- * @param string $relationship The name of the relationship (optionally)
- * @param true|false $inverse Whether we're deleting inverse relationships (default false)
- * @return true|false Depending on success
- */
- function remove_entity_relationships($guid_one, $relationship = "", $inverse = false) {
-
- global $CONFIG;
-
- $guid_one = (int) $guid_one;
-
- if (!empty($relationship)) {
- $relationship = sanitise_string($relationship);
- $where = "and relationship='$relationship'";
- } else {
- $where = "";
+ $CONFIG->relationship_url_handler[$relationship_type] = $function_name;
+
+ return true;
+}
+
+/**
+ * Get the url for a given relationship.
+ *
+ * @param int $id Relationship ID
+ *
+ * @return string
+ */
+function get_relationship_url($id) {
+ global $CONFIG;
+
+ $id = (int)$id;
+
+ if ($relationship = get_relationship($id)) {
+ $view = elgg_get_viewtype();
+
+ $guid = $relationship->guid_one;
+ $type = $relationship->relationship;
+
+ $url = "";
+
+ $function = "";
+ if (isset($CONFIG->relationship_url_handler[$type])) {
+ $function = $CONFIG->relationship_url_handler[$type];
}
-
- if (!$inverse) {
- return delete_data("DELETE from {$CONFIG->dbprefix}entity_relationships where guid_one=$guid_one {$where}");
- } else {
- return delete_data("DELETE from {$CONFIG->dbprefix}entity_relationships where guid_two=$guid_one {$where}");
+ if (isset($CONFIG->relationship_url_handler['all'])) {
+ $function = $CONFIG->relationship_url_handler['all'];
}
-
- }
- /**
- * Get all the relationships for a given guid.
- *
- * @param int $guid
- */
- function get_entity_relationships($guid)
- {
- global $CONFIG;
-
- $guid = (int)$guid;
-
- $query = "SELECT * from {$CONFIG->dbprefix}entity_relationships where guid_one=$guid";
-
- return get_data($query, "row_to_elggrelationship");
- }
-
- /**
- * Return entities matching a given query joining against a relationship.
- *
- * @param string $relationship The relationship eg "friends_of"
- * @param int $relationship_guid The guid of the entity to use query
- * @param bool $inverse_relationship Reverse the normal function of the query to instead say "give me all entities for whome $relationship_guid is a $relationship of"
- * @param string $type
- * @param string $subtype
- * @param int $owner_guid
- * @param string $order_by
- * @param int $limit
- * @param int $offset
- * @param boolean $count Set to true if you want to count the number of entities instead (default false)
- * @param int $site_guid The site to get entities for. Leave as 0 (default) for the current site; -1 for all sites.
- * @return array|int|false An array of entities, or the number of entities, or false on failure
- */
- function get_entities_from_relationship($relationship, $relationship_guid, $inverse_relationship = false, $type = "", $subtype = "", $owner_guid = 0, $order_by = "time_created desc", $limit = 10, $offset = 0, $count = false, $site_guid = 0)
- {
- global $CONFIG;
-
- $relationship = sanitise_string($relationship);
- $relationship_guid = (int)$relationship_guid;
- $inverse_relationship = (bool)$inverse_relationship;
- $type = sanitise_string($type);
- $subtype = get_subtype_id($type, $subtype);
- $owner_guid = (int)$owner_guid;
- $order_by = sanitise_string($order_by);
- $limit = (int)$limit;
- $offset = (int)$offset;
- $site_guid = (int) $site_guid;
- if ($site_guid == 0)
- $site_guid = $CONFIG->site_guid;
-
- //$access = get_access_list();
-
- $where = array();
-
- if ($relationship!="")
- $where[] = "r.relationship='$relationship'";
- if ($relationship_guid)
- $where[] = ($inverse_relationship ? "r.guid_two='$relationship_guid'" : "r.guid_one='$relationship_guid'");
- if ($type != "")
- $where[] = "e.type='$type'";
- if ($subtype)
- $where[] = "e.subtype=$subtype";
- if ($owner_guid != "")
- $where[] = "e.owner_guid='$owner_guid'";
- if ($site_guid > 0)
- $where[] = "e.site_guid = {$site_guid}";
-
- // Select what we're joining based on the options
- $joinon = "e.guid = r.guid_one";
- if (!$inverse_relationship)
- $joinon = "e.guid = r.guid_two";
-
- if ($count) {
- $query = "select count(distinct e.guid) as total ";
- } else {
- $query = "select distinct e.* ";
+ if (is_callable($function)) {
+ $url = call_user_func($function, $relationship);
}
- $query .= " from {$CONFIG->dbprefix}entity_relationships r JOIN {$CONFIG->dbprefix}entities e on $joinon where ";
- foreach ($where as $w)
- $query .= " $w and ";
- $query .= get_access_sql_suffix("e"); // Add access controls
- if (!$count) {
- $query .= " order by $order_by limit $offset, $limit"; // Add order and limit
- return get_data($query, "entity_row_to_elggstar");
- } else {
- if ($count = get_data_row($query)) {
- return $count->total;
- }
+
+ if ($url == "") {
+ $nameid = $relationship->id;
+
+ $url = elgg_get_site_url() . "export/$view/$guid/relationship/$nameid/";
}
+
+ return $url;
+ }
+
+ return false;
+}
+
+/**** HELPER FUNCTIONS FOR RELATIONSHIPS OF TYPE 'ATTACHED' ****/
+// @todo what is this?
+
+/**
+ * Function to determine if the object trying to attach to other, has already done so
+ *
+ * @param int $guid_one This is the target object
+ * @param int $guid_two This is the object trying to attach to $guid_one
+ *
+ * @return bool
+ * @access private
+ */
+function already_attached($guid_one, $guid_two) {
+ if ($attached = check_entity_relationship($guid_one, "attached", $guid_two)) {
+ return true;
+ } else {
return false;
-
}
-
- /**** HELPER FUNCTIONS FOR RELATIONSHIPS OF TYPE 'ATTACHED' ****/
-
- /**
- * Function to determine if the object trying to attach to other, has already done so
- * @param int $guid_one This is the target object
- * @param int $guid_two This is the object trying to attach to $guid_one
- * @return true | false
- **/
-
- function already_attached($guid_one, $guid_two){
-
- if($attached = check_entity_relationship($guid_one, "attached", $guid_two)){
- return true;
- }else{
- return false;
- }
- }
-
- /**
- * Function to get all objects attached to a particular object
- * @param int $guid
- * @param string $type - the type of object to return e.g. 'file', 'friend_of' etc
- * @return an array of objects
- **/
-
- function get_attachments($guid, $type=""){
-
- $attached = get_entities_from_relationship("attached", $guid, $inverse_relationship = false, $type, $subtype = "", $owner_guid = 0, $order_by = "time_created desc", $limit = 10, $offset = 0, $count = false, $site_guid = 0);
- return $attached;
-
- }
-
- /**
- * Function to remove a particular attachment between two objects
- * @param int $guid_one This is the target object
- * @param int $guid_two This is the object to remove from $guid_one
- * @return a view
- **/
-
- function remove_attachment($guid_one, $guid_two){
-
- if(already_attached($guid_one, $guid_two))
- remove_entity_relationship($guid_one, "attached", $guid_two);
-
- }
-
-
-
- /**
- * Function to start the process of attaching one object to another
- * @param int $guid_one This is the target object
- * @param int $guid_two This is the object trying to attach to $guid_one
- * @return a view
- **/
-
- function make_attachment($guid_one, $guid_two){
-
- if(!(already_attached($guid_one, $guid_two)))
- if(add_entity_relationship($guid_one, "attached", $guid_two))
- return true;
-
- }
-
- /**
- * Handler called by trigger_plugin_hook on the "import" event.
- */
- function import_relationship_plugin_hook($hook, $entity_type, $returnvalue, $params)
- {
- $element = $params['element'];
-
- $tmp = NULL;
-
- if ($element instanceof ODDRelationship)
- {
- $tmp = new ElggRelationship();
- $tmp->import($element);
-
- return $tmp;
+}
+
+/**
+ * Function to get all objects attached to a particular object
+ *
+ * @param int $guid Entity GUID
+ * @param string $type The type of object to return e.g. 'file', 'friend_of' etc
+ *
+ * @return ElggEntity[]
+ * @access private
+ */
+function get_attachments($guid, $type = "") {
+ $options = array(
+ 'relationship' => 'attached',
+ 'relationship_guid' => $guid,
+ 'inverse_relationship' => false,
+ 'type' => $type,
+ 'subtypes' => '',
+ 'owner_guid' => 0,
+ 'order_by' => 'time_created desc',
+ 'limit' => 10,
+ 'offset' => 0,
+ 'count' => false,
+ 'site_guid' => 0
+ );
+ $attached = elgg_get_entities_from_relationship($options);
+ return $attached;
+}
+
+/**
+ * Function to remove a particular attachment between two objects
+ *
+ * @param int $guid_one This is the target object
+ * @param int $guid_two This is the object to remove from $guid_one
+ *
+ * @return void
+ * @access private
+ */
+function remove_attachment($guid_one, $guid_two) {
+ if (already_attached($guid_one, $guid_two)) {
+ remove_entity_relationship($guid_one, "attached", $guid_two);
+ }
+}
+
+/**
+ * Function to start the process of attaching one object to another
+ *
+ * @param int $guid_one This is the target object
+ * @param int $guid_two This is the object trying to attach to $guid_one
+ *
+ * @return true|void
+ * @access private
+ */
+function make_attachment($guid_one, $guid_two) {
+ if (!(already_attached($guid_one, $guid_two))) {
+ if (add_entity_relationship($guid_one, "attached", $guid_two)) {
+ return true;
}
}
-
- /**
- * Handler called by trigger_plugin_hook on the "export" event.
- */
- function export_relationship_plugin_hook($hook, $entity_type, $returnvalue, $params)
- {
- global $CONFIG;
-
- // Sanity check values
- if ((!is_array($params)) && (!isset($params['guid'])))
- throw new InvalidParameterException(elgg_echo('InvalidParameterException:GUIDNotForExport'));
-
- if (!is_array($returnvalue))
- throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonArrayReturnValue'));
-
- $guid = (int)$params['guid'];
-
- $result = get_entity_relationships($guid);
-
- if ($result)
- {
- foreach ($result as $r)
- $returnvalue[] = $r->export();
+}
+
+/**
+ * Handler called by trigger_plugin_hook on the "import" event.
+ *
+ * @param string $hook import
+ * @param string $entity_type all
+ * @param mixed $returnvalue Value from previous hook
+ * @param mixed $params Array of params
+ *
+ * @return mixed
+ * @access private
+ */
+function import_relationship_plugin_hook($hook, $entity_type, $returnvalue, $params) {
+ $element = $params['element'];
+
+ $tmp = NULL;
+
+ if ($element instanceof ODDRelationship) {
+ $tmp = new ElggRelationship();
+ $tmp->import($element);
+ }
+ return $tmp;
+}
+
+/**
+ * Handler called by trigger_plugin_hook on the "export" event.
+ *
+ * @param string $hook export
+ * @param string $entity_type all
+ * @param mixed $returnvalue Previous hook return value
+ * @param array $params Parameters
+ *
+ * @elgg_event_handler export all
+ * @return mixed
+ * @throws InvalidParameterException
+ * @access private
+ */
+function export_relationship_plugin_hook($hook, $entity_type, $returnvalue, $params) {
+ // Sanity check values
+ if ((!is_array($params)) && (!isset($params['guid']))) {
+ throw new InvalidParameterException(elgg_echo('InvalidParameterException:GUIDNotForExport'));
+ }
+
+ if (!is_array($returnvalue)) {
+ throw new InvalidParameterException(elgg_echo('InvalidParameterException:NonArrayReturnValue'));
+ }
+
+ $guid = (int)$params['guid'];
+
+ $result = get_entity_relationships($guid);
+
+ if ($result) {
+ foreach ($result as $r) {
+ $returnvalue[] = $r->export();
}
-
- return $returnvalue;
}
-
- /** Register the import hook */
- register_plugin_hook("import", "all", "import_relationship_plugin_hook", 3);
-
- /** Register the hook, ensuring entities are serialised first */
- register_plugin_hook("export", "all", "export_relationship_plugin_hook", 3);
-?> \ No newline at end of file
+
+ return $returnvalue;
+}
+
+/**
+ * Notify user that someone has friended them
+ *
+ * @param string $event Event name
+ * @param string $type Object type
+ * @param mixed $object Object
+ *
+ * @return bool
+ * @access private
+ */
+function relationship_notification_hook($event, $type, $object) {
+ /* @var ElggRelationship $object */
+ $user_one = get_entity($object->guid_one);
+ /* @var ElggUser $user_one */
+
+ return notify_user($object->guid_two,
+ $object->guid_one,
+ elgg_echo('friend:newfriend:subject', array($user_one->name)),
+ elgg_echo("friend:newfriend:body", array($user_one->name, $user_one->getURL()))
+ );
+}
+
+// Register the import hook
+elgg_register_plugin_hook_handler("import", "all", "import_relationship_plugin_hook", 3);
+
+// Register the hook, ensuring entities are serialised first
+elgg_register_plugin_hook_handler("export", "all", "export_relationship_plugin_hook", 3);
+
+// Register event to listen to some events
+elgg_register_event_handler('create', 'friend', 'relationship_notification_hook');
generated by cgit v1.2.3 (git 2.39.1) at 2025-11-13 10:16:20 +0000