Codeigniter在关注用户后删除关注按钮

Question

Hi I am able to display users friends on a page but when I into the friends profile I still see the follow button, is there anyway I can remove the button after following? I am using codeigniter. see code.

Model

public function get_friends($user_id = NULL){
    if ($user_id = $this->session->userdata('user_id')){
    $this->db->select('*');
    $this->db->from('users');
    $this->db->join('friends', 'friends.user_id = users.user_id');
    $this->db->where('friends.user_id2', $user_id);
    $query = $this->db->get();
    return $query->result_array($user_id);
        }
}

Controller

public function view($user_id = NULL){
    $data['friends'] = $this->Friend_model->get_friends($user_id);  
    $this->load->view('user/templates/header_view_subpage');
    $this->load->view('user/members_entry_view', $data);
    $this->load->view('user/templates/footer_view_subpage');

}

View

<?php
     $session = $this->session->userdata('user_id');
     $friends = $this->session->userdata('user_id2');
     if($session == $members['user_id']):
?> 
    <div class="col-md-6">
    <button type="button" class="btn btn-primary btn-sm btn-block"><i class="fa fa-envelope"></i> Send Message</button>
    </div>
<?php 
endif;
?>

Answer 1

You'll have to write a function that checks if a user is already a friend or not, something like this:

public function isFriend($id){
return $this->Friend_model->is_friend($user_id);  
}

the is_friend method will fetch the database and tries to fetch a user with the $user_id, if there is a record then our function will return true otherwise it will return false;

public function is_friend($user_id,$friend_id){ 
$this->db->select('*'); 
$this->db->from('friends');
$this->db->where('user_id',$user_id); 
$this->db->where('friend_id',$friend_id); 
$query = $this->db->get(); 
$results = $query->result_array(); 
return count($results) ? 1 : 0; 
} 

After this we call the function in our view, if it returns true, then we don't show the button otherwise we show it.