twit / twit.inc.php

<?php


 class Twit {


    const twit_addr = 'https://api.twitter.com/1/statuses/user_timeline.rss';
    const twit_num = 500;

    private $_db;
    private $lasterror='';

    //----------------------------------
    private function get_mysqli() {

       return new mysqli('','','','');
    }

    //----------------------------------
    private function check_sql_error($agent='') {

       if ($agent==='')
          $agent = $this->_db;

       if ($agent->errno!=0) {
          throw new Exception ('database error: '.$agent->error);
       }
    }

    //----------------------------------
    private function check_auth() {

       if (!$this->is_logged())
          throw new Exception('authorization error');
    }

    //----------------------------------
    public function mk_tables() {

       $this->check_auth();

       $sqls = array ('drop table if exists twit_lines',

       'drop table if exists twit_twits',

       'create table twit_lines (id int(11) not null auto_increment,
       line_name varchar(50), primary key(`id`))',

       'create table twit_twits (id int(11) not null auto_increment,
       line_id int(11),
       title varchar(500), description varchar(500),
       link varchar(500), pubdate datetime, primary key(`id`))');

       while (list($key,$sq)= each($sqls)) {
          $this->_db->query($sq);
          $this->check_sql_error();
          }

       return 'operation completed';
    }

    //----------------------------------
    private function filt($s) {

       $s = preg_replace('/(https?:\/\/.*?)(\s|$)/i','<a href="$1" target="_blank">$1</a>',$s);

       return $s;
    }
    //----------------------------------
    private function date_rss2mysql($s) {

       preg_match('/(\S*?),\s(\d*?)\s(\D*?)\s(\d*?)\s(\d*?):(\d*?):(\d*?)\s/i', $s, $matches);

       $dayofweek = $matches[1];
       $day = $matches[2];
       $mon = $matches[3];
       $year = $matches[4];
       $hour = $matches[5];
       $minute = $matches[6];
       $second = $matches[7];

        switch ($mon) {
          case 'Jan': $mon4='01'; break;
          case 'Feb': $mon4='02'; break;
          case 'Mar': $mon4='03'; break;
          case 'Apr': $mon4='04'; break;
          case 'May': $mon4='05'; break;
          case 'Jun': $mon4='06'; break;
          case 'Jul': $mon4='07'; break;
          case 'Aug': $mon4='08'; break;
          case 'Sep': $mon4='09'; break;
          case 'Oct': $mon4='10'; break;
          case 'Nov': $mon4='11'; break;
          case 'Dec': $mon4='12'; break;
       }

       return $year.'-'.$mon4.'-'.$day.' '.$hour.':'.$minute.':'.$second;
    }
    //----------------------------------
    private function date_rss2mysql4($s) {

       //   Thu, 27 Dec 2012 13:35:18 +0000

       //   2012-12-27 13:35:18

       $ver = phpversion();
       $ver = explode('.',$ver);
       $ver = implode(array_slice($ver,0,2));

       if ($ver>=53) {

         $date =  DateTime::createFromFormat('D, d M Y H:i:s O',$s);
         $s = $date->format('Y-m-d H:i:s',$tm);

       } else {
          $tm = strtotime($s);
          $s = date('Y-m-d H:i:s',$tm);
       }

       return $s;
    }
    //----------------------------------
    private function is_logged() {

       if (isset($_SESSION['logged_in']))
          return $_SESSION['logged_in'];

       return false;
    }

    //----------------------------------
    private function get_twitline_num($name) {

       $res = $this->_db->query(
          "select min(id) from twit_lines where line_name='".
          $this->_db->real_escape_string($name)."'");


       $this->check_sql_error();

       if ($row = $res->fetch_array(MYSQL_NUM))
          $num = $row[0];
       else
          $num=false;

       $res->close();
       return $num;
    }


    //----------------------------------
    private function get_firstnum($id) {

       $res = $this->_db->query('select max(link) from twit_twits where line_id='.$id);
       $this->check_sql_error();

       if ($row = $res->fetch_array(MYSQL_NUM)) {
          $num = substr(strrchr($row[0],'/'),1);
       }
       else $num=0;

       $res->close();
       return $num;
    }
    //----------------------------------
    private function get_lastnum($id) {

       $res = $this->_db->query('select min(link) from twit_twits where line_id='.$id);
       $this->check_sql_error();

       if ($row = $res->fetch_row()) {
          $num = substr(strrchr($row[0],'/'),1);
       }
       else $num=0;

       $res->close();
       return $num;
    }

    //----------------------------------
    private function getNRows($id) {


       $res = $this->_db->query('select * from twit_twits where line_id='.
       $this->_db->real_escape_string($id));

       $this->check_sql_error();

       $nrows = $res->num_rows;
       $res->close();

       return $nrows;
    }
    //----------------------------------
    public function greeting() {
       return 'ready';
    }

    //----------------------------------
    public function show_twitlines() {


       $res = $this->_db->query('select id, line_name from twit_lines order by id desc');
       $this->check_sql_error();

       ob_start();
       echo '<form id="lineform"><ul class="twitlines">';
       while ($row = $res->fetch_object()) {
          echo '<li><input type="radio" name="line_name" value="'.$row->line_name.'" />'.
          '<a href="#" rel="_show_twitline" lnname="'.$row->line_name.'">'.$row->line_name.'</a></li>';
       }
       echo '</ul></form>';

       $s = ob_get_clean();
       return $s;
    }

    //----------------------------------
    public function show_controls() {

       $s = '<ul class="controls">
       <li><a href="#" rel="_add_twitline_form">add twitter feed</a></li>
       <li><a href="#" rel="_edit_twitline_form">edit twitter feed</a></li>
       <li><a href="#" rel="refill_twitline">fill twitter feed</a></li>
       <li><a href="#" rel="_update_twitline">update twitter feed</a></li>
       <li><a href="#" rel="_clear_twitline">clear twitter feed</a></li>
       <li><a href="#" rel="_delete_twitline_form">delete twitter feed</a></li>

       </ul>';

       return $s;
    }

    //----------------------------------
    public function edit_twitline_form($name='') {

       $this->check_auth();

       if ($name=='') {
          $isedit = false;

          $line_name = '';
          $line_id = 0;
       }
       else {
          $isdeit = true;
          $num = $this->get_twitline_num($name);

          if ($num===false)
             throw new Exception ('error getting twitter line');

          $res = $this->_db->query('select * from twit_lines where id='.$num);
          $this->check_sql_error();

          if (!$row = $res->fetch_assoc())
             throw new Exception ('error getting twitter line info');

          $res->close();
          $line_name = $row['line_name'];
          $line_id = $row['id'];
       }

       ob_start();
       echo '<form rel="_save_twitline" '.
       'enctype="application/x-www-form-urlencoded">'.
       '<p> input twitter feed name: '.
       '<input type="text" name="line_name" value="'.$line_name.'" /></p>'.
       '<input type="hidden" name="line_id" value="'.$line_id,'" />'.
       '<p><input type="submit" name="submit" value="save"/>'.
       '<input type="button" rel="_greeting" value="cancel" /></p></form>';

       $s = ob_get_contents();
       ob_end_clean();

       return $s;
    }

    //----------------------------------
    public function add_twitline_form() {

       return $this->edit_twitline_form();
    }

    //----------------------------------
    public function delete_twitline_form($name) {

       $this->check_auth();

       if (!$name)
          throw new Exception('line_name parameter is empty');

       $num = $this->get_twitline_num($name);
       if ($num===false)
          throw new Exception ('error getting twitter line');

       $s = '<form rel="_delete_twitline" '.
       'enctype="application/x-www-form-urlencoded">'.
       '<input type="hidden" name="line_id" value="'.$num.'" />'.
       '<p><input type="submit" name="submit" value="delete"/>'.
       '<input type="button" rel="_greeting" value="cancel"></p></form>';

       return $s;
    }

    //----------------------------------
    public function save_twitline() {

       $this->check_auth();

       if ($_POST['line_id']==0) {

          $stmt = $this->_db->prepare(
             'insert into twit_lines(line_name) values(?)');

          $stmt->bind_param('s', $_POST['line_name']);
          $stmt->execute();
          $this->check_sql_error($stmt);
          $id = $stmt->insert_id;
          $stmt->close();
          return "record with number $id inserted";


       } else {

          $stmt = $this->_db->prepare(
             'update twit_lines set line_name=? where id=?');

          $stmt->bind_param('si', $_POST['line_name'], $_POST['line_id']);
          $stmt->execute();
          $this->check_sql_error($stmt);
          $affected = $stmt->affected_rows;
          $stmt->close();
          return " $affected records updated";
       }

    }

    //----------------------------------
    public function delete_twitline() {

       $this->check_auth();

       $stmt = $this->_db->prepare(
          'delete from twit_lines where id=?');

       $stmt->bind_param('i', $_POST['line_id']);
       $stmt->execute();
       $this->check_sql_error($stmt);
       $affected = $stmt->affected_rows;
       $stmt->close();
       return " deleted rows $affected";

    }

    //----------------------------------
    public function show_loginout_form() {

       if (!$this->is_logged()) {
          $frm ='<form rel="_loginout" '.
          'enctype="application/x-www-form-urlencoded">'.
          '<p>input password <input type="text" name="pass" /></p>'.
          '<p><input type="submit" name="submit" value="login" />'.
          '<input type="button" rel="_greeting" value="cancel"></p></form>';
       }
       else {
          parse_str($_SERVER['QUERY_STRING'], $getvars);
          $action = $getvars['action'];

          $action = 'greeting';

          $frm = '<form rel="_loginout" '.
          'enctype="application/x-www-form-urlencoded">'.
          '<p>log out, are you sure? '.
          '<input type="submit" name="logout" value="logout" />'.
          '<input type="button" rel="_'.$action.'" value="cancel" />'.
          '</p></form>';


       }

       return $frm;
    }

    //----------------------------------
    public function loginstatus() {

       $s = $this->is_logged() ? 'logged in' : 'logged out';
       $s4 = $this->is_logged() ? 'log out' : 'log in';

       return $s.'<br/><a href="#" rel="_show_loginout_form">'.$s4.'</a>';
    }
    //----------------------------------
    public function loginout() {

       if ($this->is_logged()===false) {
          if ($_POST['pass']=='password') {
             $_SESSION['logged_in']=true;
             return 'successfully authorized';
          } else {
             return 'invalid password, '.
             '<a href="#" rel="_show_loginout_form">try again</a>';
          }

       } else {
          if (isset($_SESSION['logged_in']))
             unset($_SESSION['logged_in']);
       }
    }

    //----------------------------------
    public function show_twitline($name) {

       $num = $this->get_twitline_num($name);
       $npages = ceil($this->getNRows($num)/100);

       if ($num===false)
          throw new Exception ('error getting twitter line');

       $stmt = $this->_db->prepare(
          'select id, title, description, link, '.
          'DATE_FORMAT(pubdate,\'%d.%m.%Y  %H:%i\') from twit_twits '.
          ' where line_id=? order by link desc');

       $stmt->bind_param('i',$num);
       $stmt->execute();
       $stmt->bind_result($id, $title, $description, $link, $pubdate);
       //---------------------------
       if (isset($_GET['page'])) {
          if ($_GET['page']>1) {
             for ($i=0; $i<($_GET['page']-1)*100; $i++)
                $stmt->fetch();
             }
       }
       //---------------------------
       ob_start();

       echo '<ul class="pager">';
       for ($i=0; $i<$npages; $i++) {
          echo '<li><a href="#" rel="_show_twitline" pg="'.($i+1).
          '" lnname="'.$name.'">'.
          ($i+1).'</a></li>';
       }
       echo '</ul>';
       //---------------------------

       $j=0;
       echo '<ul class="twitfeed">';
       while (($stmt->fetch()) && ($j<100)) {
          printf ("<li>
              <div class=\"twitid\">%s</div>
              <div class=\"twittitle\">%s</div>
              <div class=\"twitdesc\">%s</div>
              <div class=\"twitlink\">%s</div>
              <div class=\"twitpubdate\">%s</div>

             </li>",
          $id, $this->filt($title), $description, $link, $pubdate);

          $j++;
       }
       echo '</ul>';

       $s = ob_get_clean();
       $stmt->close();

       return $s;

    }

    //----------------------------------------------------------------------
    public function clear_twitline($name) {

       $line_id = $this->get_twitline_num($name);

       if ($line_id===false)
          throw new Exception ('error getting twitter line');

       $this->_db->query('delete from twit_twits where line_id='.$line_id);
       $this->check_sql_error();

       return 'twit line cleared, '.$this->_db->affected_rows.' deleted';
    }

    //----------------------------------------------------------------------
    private function save_twits($url, $line_id, $exclude) {

       //--------------------------
       $ch = curl_init();
       curl_setopt($ch, CURLOPT_URL, $url);
       curl_setopt($ch, CURLOPT_TIMEOUT, 10);
       curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
       curl_setopt($ch, CURLOPT_USERAGENT,
          "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)");
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

       $s = curl_exec($ch);

       if (curl_errno($ch)) {
          throw new Exception ('curl exception: '.curl_error($ch));
       }
       curl_close($ch);
       //--------------------------

       $tw = array();
       $xml = simplexml_load_string($s);

       foreach ($xml->channel->item as $item) {

          $f = array();
          $f['title'] = $item->title;
          $f['description'] = $item->description;
          $f['link'] = $item->link;
          $f['pubdate'] = $item->pubDate;

          array_push($tw, $f);
       }
       //--------------------------

       $stmt = $this->_db->prepare (
       'insert into twit_twits(line_id, title, description, link, pubdate)'.
       'values (?,?,?,?,?)');

       for ($i=0; $i<count($tw); $i++) {

          extract($tw[$i]);
          if (substr(strrchr($link,'/'),1)==$exclude)
             continue;

          $pubdate4 = $this->date_rss2mysql4($pubdate);
          $stmt->bind_param('issss', $line_id, $title, $description, $link, $pubdate4);

          $stmt->execute();
          $this->check_sql_error();

       }
       $stmt->close();

       return 'inserted '.count($tw).' twits : '.$url;
    }

    //----------------------------------------------------------------------

    public function fill_twitline($name) {

       $this->check_auth();

       $line_id = $this->get_twitline_num($name);
       if ($line_id===false)
          throw new Exception ('error getting twitter line');

       $last_num = $this->get_lastnum($line_id);

       $data = array (
          'screen_name'=>$name,
          'count'=>Twit::twit_num
       );
       if ($last_num!=0)
          $data['max_id']=$last_num;

       $url = Twit::twit_addr.'?'.http_build_query($data);

       return $this->save_twits($url, $line_id, $last_num);

    }
    //----------------------------------
    public function update_twitline($name) {

       $this->check_auth();

       $line_id = $this->get_twitline_num($name);
       if ($line_id===false)
          throw new Exception ('error getting twitter line');

       $first_num = $this->get_firstnum($line_id);

       if ($first_num==0)  {
          throw new Exception ('cannot update empty line');
       }

       $data = array (
             'screen_name'=>$name,
             'count'=>Twit::twit_num,
             'since_id'=>$first_num
          );

       $url = Twit::twit_addr.'?'.http_build_query($data);

       return $this->save_twits($url, $line_id, $first_num);

    }
    //----------------------------------
    public function refill_twitline($name) {


       $this->check_auth();

       $s = $this->fill_twitline($name);

       $f =ltrim(substr(strstr($s, 'inserted'),8));
       $f = substr_replace($f,'', strpos($f,' '));

       if ($f<200) {
          $s .= '<br/><br/>operation finished';
          return $s;
       }

       $s .= '
       <script type="text/javascript">
          var el = document.createElement("DIV");
          document.body.appendChild(el);

          el.num = 1;
          el.zz = setInterval (
             function() {
                el.innerHTML ="reload after "+el.num+"s";
                el.num--;
                if (el.num==0) {
                   clearInterval(el.zz);
                   location.replace(location.href);
                }
             }
          ,1000);
       </script>';

       return $s;

    }

    //----------------------------------
    public function exceptionHandler($e) {

       $this->lasterror .= 'exception: '.$e->getMessage().'<br/><br/>';
    }
    //----------------------------------
    public function errorHandler($errno, $errstr, $errfile, $errline) {

       $this->lasterror .= "error occured: errno:$errno errstr:$errstr
        errfile:$errfile errline:$errline<br/><br/>";

       return true;
    }

    //----------------------------------
    public function __construct() {

       session_start();
       set_exception_handler(array($this,'exceptionHandler'));
       set_error_handler(array($this, 'errorHandler'));

       $this->_db = $this->get_mysqli();

    }

    //----------------------------------
    public function __destruct() {

       $this->_db->close();
       echo $this->lasterror;
    }


 }


?>