ComunicAPI/classes/components/likes.php
2018-07-17 10:19:45 +02:00

196 lines
4.4 KiB
PHP

<?php
/**
* Likes class
*
* @author Pierre HUBERT
*/
class Likes {
/**
* Database table name
*/
const LIKES_TABLE = "aime";
/**
* Kind of likes
*/
const LIKE_USER = "user";
const LIKE_POST = "post";
const LIKE_COMMENT = "comment";
const LIKE_GROUP = "group";
/**
* Translation of the kinds of like for the database
*/
const KINDS_DB = array(
Likes::LIKE_USER => "page",
Likes::LIKE_POST => "texte",
Likes::LIKE_COMMENT => "commentaire",
Likes::LIKE_GROUP => "group"
);
/**
* Count the number of likes for a specific component
*
* @param int $id The ID of the component to count
* @param string $kind The kind of the component
* @return int The number of likes of the components
*/
public function count(int $id, string $kind) : int {
//Perform a database request
return CS::get()->db->count(
$this::LIKES_TABLE,
"WHERE ID_type = ? AND type = ?",
array($id, $this::KINDS_DB[$kind])
);
}
/**
* Check whether user likes or not somethind
*
* @param int $userID The ID of the user
* @param int $id The ID of the thing to check
* @param string $kind The kind of the thing to check
* @return bool True if the user likes / false else
*/
public function is_liking(int $userID, int $id, string $kind) : bool {
//User "0" does not like content
if($userID == 0)
return false;
//Perform check on database
return CS::get()->db->count(
$this::LIKES_TABLE,
"WHERE ID_type = ? AND type = ? AND ID_personne = ?",
array($id, $this::KINDS_DB[$kind], $userID)
) == 1;
}
/**
* Update like status
*
* @param int $userID The ID of the user
* @param bool $like New like status
* @param int $id The ID of the component element to update
* @param string $kind The kind of component
*/
public function update(int $userID, bool $like, int $id, string $kind){
//Check if the request is not to like anymore
if(!$like){
//Delete on the database
$conditions = "ID_personne = ? AND ID_type = ? AND type = ?";
$values = array($userID, $id, $this::KINDS_DB[$kind]);
CS::get()->db->deleteEntry($this::LIKES_TABLE, $conditions, $values);
}
//We have to like component
else {
//Check if user is already liking component
if($this->is_liking($userID, $id, $kind))
return; //Nothing to be done
//Insert in the database
$values = array(
"ID_type" => $id,
"ID_personne" => $userID,
"Date_envoi" => mysql_date(),
"type" => $this::KINDS_DB[$kind]
);
//Insert in the database
CS::get()->db->addLine($this::LIKES_TABLE, $values);
}
}
/**
* Get all the likes of a user, as UserLike objects
*
* @param int $userID The ID of the target user
* @return array The list of likes
*/
public function get_all_user(int $userID) : array {
//Query the database
$table = self::LIKES_TABLE;
$condition = "WHERE ID_personne = ?";
$condValues = array($userID);
$entries = cs()->db->select($table, $condition, $condValues);
$likes = array();
//Process the list of likes
foreach($entries as $entry)
$likes[] = $this->dbToUserLike($entry);
return $likes;
}
/**
* Delete all the likes associated to an element
*
* @param int $id The ID of element to update
* @param string $kind The kind of the component
* @return bool TRUE for a success and FALSE for a failure
*/
public function delete_all(int $id, string $kind) : bool {
//Delete on the database
return CS::get()->db->deleteEntry(
$this::LIKES_TABLE,
"ID_type = ? AND type = ?",
array($id, $this::KINDS_DB[$kind])
);
}
/**
* Delete all the likes of a user
*
* @param int $userID The ID of the target user
* @return bool TRUE for a success / FALSE else
*/
public function delete_all_user(int $userID) : bool {
//Delete on the database
return CS::get()->db->deleteEntry(
$this::LIKES_TABLE,
"ID_personne = ?",
array($userID)
);
}
/**
* Turn database entry into UserLike object
*
* @param array $entry The database entry
* @return UserLike Generated user like object
*/
private static function dbToUserLike(array $entry) : UserLike {
$like = new UserLike();
$like->set_id($entry["ID"]);
$like->set_userID($entry["ID_personne"]);
$like->set_time_sent(strtotime($entry["Date_envoi"]));
$like->set_elem_id($entry["ID_type"]);
$like->set_elem_type($entry["type"]);
return $like;
}
}
//Register class
Components::register("likes", new Likes());