tims-todo/application/models/Friend_model.php

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2014-08-08 15:41:59 -04:00
<?php
/**
* Model for friend management
*/
class Friend_model extends CI_Model {
/**
* Get Friends
*
* Gets list of friends and their associated groups
* @return mixed
*/
public function get_friends()
{
$user_id = $this->session->userdata('uid');
//Get the list of friends
$friends = $this->db
->select('user_friend_id,user_friend_link.user_id as uid,user.username,user.email')
->from('todo_user_friend_link')
->join('user', 'user.id=user_friend_link.user_friend_id OR todo_user.id=todo_user_friend_link.user_id', 'inner')
2014-08-08 15:41:59 -04:00
->group_start()
->where_in('todo_user_friend_link.user_id', $user_id)
->or_where_in('todo_user_friend_link.user_friend_id', $user_id)
->group_end()
->where('confirmed', FRIEND_CONFIRMED)
->where('user.id !=', $user_id)
->order_by('username', 'asc')
->get();
if($friends->num_rows() > 0) //Retrieve friends
{
$res_array = array();
$friend_list = array();
foreach ($friends->result_array() as $friend)
{
$friend_id = ($friend['uid'] !== $user_id)
? $friend['uid']
: $friend['user_friend_id'];
$res_array[$friend_id] = $friend;
$friend_list[] = $friend_id;
}
//Get each user's groups
$groups = $this->db->select('user_id, name as group_name')
->distinct()
->from('group')
->join('group_users_link', 'group_users_link.group_id=group.id', 'inner')
->where_in('todo_group_users_link.user_id', $friend_list)
->order_by('user_id, group_name', 'asc')
->get();
if($groups->num_rows() > 0)
{
foreach($groups->result_array() as $group)
{
$res_array[$group['user_id']]['groups'][] = $group['group_name'];
}
}
return $res_array;
}
else
{
return FALSE;
}
}
// --------------------------------------------------------------------------
/**
* Find Friends
*
* Gets list of possible friends from search query
* @return mixed
*/
public function find_friends()
{
$query = $this->input->get('q', TRUE);
$user_id = (int) $this->session->userdata('uid');
// Don't allow empty searches to reach the database
if (empty($query)) return [];
//Loosely match usernames and emails to query
$res = $this->db->select('id, username, email')
->from('user')
->like('username', $query, 'after')
->or_like('email', $query, 'after')
->order_by('username', 'asc')
->get();
if($res->num_rows() > 0)
{
$return = array();
foreach($res->result_array() as $friend)
{
//This person is already a friend
if($this->_check_friend($friend['id']) == TRUE)
continue;
//If the person is you :/
if($user_id == $friend['id'])
continue;
$return[] = $friend;
}
return $return;
}
return (isset($return)) ? $return : [];
}
// --------------------------------------------------------------------------
/**
* Get Request
*
* Gets friend requests to the current user
* @return mixed
*/
public function get_requests()
{
$user_id = $this->session->userdata('uid');
//Get the list of requests
$requests = $this->db->select('user_id, username, email')
->from('user_friend_link')
->where('user_friend_id', $user_id)
->where('confirmed', -1)
->join('user', 'user.id=user_friend_link.user_id')
->get();
if($requests->num_rows() > 0)
{
return $requests->result_array();
}
else
{
return false;
}
}
// --------------------------------------------------------------------------
/**
* Send Request
*
* Sends a friend request, or confirms a mutual friend request
*
* @param int $friend_id
* @return int
*/
public function send_request($friend_id)
{
$user_id = (int) $this->session->userdata('uid');
//Check for request from the user
$friend_check = $this->db->select('user_id')
->from('user_friend_link')
->where('user_id', $friend_id)
->where('user_friend_id', $user_id)
->get();
if($friend_check->num_rows() > 0)
{
// Accept the friend request
// Allows the user to add a friend they ignored
// in their requests
$this->db->set('confirmed', FRIEND_CONFIRMED)
->where('user_id', $friend_id)
->where('user_friend_id', $user_id)
->where('confirmed', FRIEND_NOT_CONFIRMED)
->update('user_friend_link');
}
else
{
//Check if the request already exists
$request_check = $this->db->from('user_friend_link')
->where('user_friend_id', $friend_id)
->where('user_id', $user_id)
->get();
if($request_check->num_rows() > 0) return -1;
//Add a friend request only if it doesn't already exist
$this->db->set('user_id', $user_id)
->set('user_friend_id', $friend_id)
->insert('user_friend_link');
}
return $this->db->affected_rows();
}
// --------------------------------------------------------------------------
/**
* Accept Request
*
* Accept a friend request
* @param int $request_id
* @return int
*/
public function accept_request($request_id)
{
$this->db->set('confirmed', FRIEND_CONFIRMED)
->where('user_id', (int)$request_id)
->where('confirmed', FRIEND_NOT_CONFIRMED)
->update('user_friend_link');
return $this->db->affected_rows();
}
// --------------------------------------------------------------------------
/**
* Reject Request
*
* Reject a friend request
* @param int $request_id
* @return int
*/
public function reject_request($request_id)
{
$this->db->set('confirmed', FRIEND_REJECTED)
->where('user_id', (int)$request_id)
->where('confirmed', FRIEND_NOT_CONFIRMED)
->update('user_friend_link');
return $this->db->affected_rows();
}
// --------------------------------------------------------------------------
/**
* Check Friend
*
* Check if a user is already a friend
* @param int $friend_id
* @return bool
*/
public function _check_friend($friend_id)
{
$user_id = $this->session->userdata('uid');
if($user_id == $friend_id)
return FALSE;
$friend = $this->db->select('user_id, user_friend_id')
->from('user_friend_link')
->where('user_id', $user_id)
->where('user_friend_id', $friend_id)
->where('confirmed', FRIEND_CONFIRMED)
->or_where('user_id', $friend_id)
->where('user_friend_id', $user_id)
->where('confirmed', FRIEND_CONFIRMED)
->get();
return (bool)($friend->num_rows() > 0);
}
}
// End of models/friend_model.php