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Het wiel uitvinden
en achter de feiten aanlopen...
In het afgelopen decennium stak ieder jaar wel een politicus of milieu-activist zijn vingertje op om vervolgens met het 'geniale plan' te komen om het openbaar vervoer gratis te maken. Dat zou de files enorm kunnen verminderen. Toen ik tussen 1996 en 1999 bij de Rai Vereniging werkte, riep mijn collega - en wandelende encyclopedie op het terrein van mobiliteitsonderzoek - Eric Glasius steevast "dat gaat niet werken..." terwijl hij wees naar onderzoeken en proeven uit Scandinavië, België en nog wat exotische oorden. De uitkomst van al die onderzoeken was dat de mensen die het openbaar vervoer al gebruiken er door die maatregel meer gebruik van gaan maken, maar dat de toename van het gebruik door mensen die de auto of fiets nemen verwaarloosbaar is. Kortom meer van hetzelfde: ov gebruik én files.
Toen vorig jaar met veel tamtam deze proef werd gelanceerd, voorspelde ik de uitkomst geheel in lijn met de buitenlandse ervaringen. En wat zag ik nu op Teletekst.
DEN HAAG De proef met gratis busvervoer tussen Leiden en Den Haag wordt per 1 januari gestaakt.Het is niet gelukt om het aantal files te verminderen. Er namen wel meer mensen de bus maar het aantal automobilisten steeg evenredig.
Goh, wat een nieuws... Misschien moeten beleidsmakers en -beïnvloeders iets meer lezen en veel minder schreeuwen, dat scheelt een hoop belastinggeld.
© Harold Makaske 18 november 2004 to allow skipping count when used in template (ie to not count on click in main page)
V1.4
- Fixed ignoe same IP count problem
V1.5
- Added views_log table and changed plugin performance to check for unique visits by IP address. [gRegor]
- Added option to set the length of time before re-counting hits from the same IP address (default: 2 hours) [gRegor]
V1.6
- Added plugin menu to display all view count, w/ counter reset function
- Delete view counter and log for deleted item
V1.7
- use sql_query
V1.8
- Admin page enhancement to preserve order and sort info
v1.9
- Added item title in admin menu
v1.9.1
- ignore draft in admin menu
*/
class NP_Views extends NucleusPlugin {
// Note: I never run this plugin on 2.0 and have no idea whether it
// wil work on <2.5. A user can simply chnage it to return
// '200' and see if it works (likely will). I will gladly
// change the min version to 2.0 and add the sql_table fix
// upon such report. 8)
function getMinNucleusVersion() {
return '250';
}
function getName() {
return 'Views';
}
function getAuthor() {
return 'Rodrigo Moraes | Edmond Hui (admun) | gRegor Morrill';
}
function getURL() {
return 'http://www.tipos.com.br';
}
function getVersion() {
return '1.9.1';
}
function getDescription() {
return 'This plugin counts how many times an entry has been displayed.';
}
function getEventList() {
return array('PostAddItem', 'QuickMenu', 'PostDeleteItem');
}
function supportsFeature($what) {
switch($what) {
case 'SqlTablePrefix':
return 1;
default:
return 0;
}
}
function getTableList() {
return array( sql_table('plugin_views'), sql_table('plugin_views_log') );
}
function install() {
sql_query('CREATE TABLE IF NOT EXISTS ' . sql_table('plugin_views') . ' (id int(11) NOT NULL default "0", views int(15) NOT NULL default "0")');
sql_query('CREATE TABLE IF NOT EXISTS ' . sql_table('plugin_views_log') . ' (id int(11) NOT NULL auto_increment, ip varchar(20) NOT NULL default "", itemid int(11) NOT NULL default "0", viewtime varchar(32) NOT NULL default "", PRIMARY KEY (id)
)');
$this->createOption('silent','Silent mode - No #Display shown in Item (still need to add the skinVar, for use with MostViewed)','yesno','no');
$this->createOption('deletetables','Delete this plugin\'s table and data when uninstalling?','yesno','yes');
$this->createOption('timespan', 'Hours to wait before re-counting visitors', 'text', '2');
}
function unInstall() {
if ($this->getOption('deletetables') == 'yes') {
sql_query('DROP TABLE ' . sql_table('plugin_views') );
sql_query('DROP TABLE ' . sql_table('plugin_views_log') );
}
}
function hasAdminArea() {
return 1;
}
/**
* Adds an entry to the 'Quick Menu' on the Nucleus administration pages.
* The entry will link to the commentcontrol admin page
*/
function event_QuickMenu(&$data) {
global $member;
if (!($member->isLoggedIn() && $member->isAdmin())) return;
array_push(
$data['options'],
array(
'title' => 'View Counts',
'url' => $this->getAdminURL(),
'tooltip' => 'See the view count of all items'
)
);
}
function doTemplateVar(&$item, $input) {
$itemid = $item->itemid;
$remote_ip = ServerVar('REMOTE_ADDR');
$timespan = $this->getOption('timespan') * 3600;
$now = time();
// get the current Views count
$query = "SELECT views FROM " . sql_table('plugin_views') . " WHERE id=" . $itemid;
$result = sql_query($query);
$row = mysql_fetch_object($result);
$views = intval($row->views);
// Only do count updates if "skipcount" is not set
if ($input != 'skipcount')
{
// This takes care of previous items
if (mysql_num_rows($result) == 0)
{
$query = "INSERT INTO " . sql_table('plugin_views') . " (id, views) VALUES('$itemid', '1')";
sql_query($query);
//$views = 0;
} // end if
// Check the views_log table to see if this IP has a viewtime for this item
$query = "SELECT viewtime FROM " . sql_table('plugin_views_log') . " WHERE ip='" . $remote_ip . "' AND itemid=" . $itemid;
$result = sql_query($query);
// No views from this IP in the past X hours, so update the Views count
if (mysql_num_rows($result) == 0)
{
$views++;
$this->_updateViewsCount($itemid, $views);
$this->_addViewsLog($itemid, $remote_ip, $now);
} // end if
else
{
$viewtime = mysql_result($result, 0, 'viewtime');
// It's been longer than X hours, so recount
if (($now - $timespan) > $viewtime)
{
$views++;
$this->_updateViewsCount($itemid, $views);
$this->_updateViewsLog($itemid, $remote_ip, $now);
}
} // end else
} // end if
// Clear logs that are more than X hours old
$time = $now - $timespan;
$query = "DELETE FROM " . sql_table('plugin_views_log') . " WHERE (viewtime < $time)";
sql_query($query);
if ($this->getOption('silent') == 'no') {
echo $views;
} // end if
}
function event_PostAddItem($data) {
$itemid = $data['itemid'];
$query = "INSERT INTO " . sql_table('plugin_views') . " (id, views) VALUES('$itemid', '0')";
sql_query($query);
}
function event_PostDeleteItem($data) {
$itemid = $data['itemid'];
$query = "DELETE FROM " . sql_table('plugin_views') . " WHERE id=". $itemid;
sql_query($query);
$query = "DELETE FROM " . sql_table('plugin_views_log') . " WHERE itemid=". $itemid;
sql_query($query);
}
function _updateViewsCount($itemid, $views) {
// update the Views table with the new count
$query = "UPDATE " . sql_table('plugin_views') . " SET views='$views' WHERE id=$itemid";
sql_query($query);
}
function _addViewsLog($itemid, $ip, $time) {
// add IP and itemid to views_log table so it won't be recounted for X hours
$query = "INSERT INTO " . sql_table('plugin_views_log') . " (ip, itemid, viewtime) VALUES ('$ip', '$itemid', '$time')";
sql_query($query);
}
function _updateViewsLog($itemid, $ip, $time) {
// update the views_log viewtime so it won't be recounted for X hours
$query = "UPDATE " . sql_table('plugin_views_log') . " SET viewtime='$time' WHERE ip='$ip'";
sql_query($query);
}
function doAction($actionType) {
global $CONF, $member;
if (!($member->isLoggedIn() && $member->isAdmin())) return 'Sorry. not allowed';
if ($actionType == 'resetview'){
$id = requestVar('id');
$query = "UPDATE " . sql_table('plugin_views') . " SET views=0 WHERE id=$id";
sql_query($query);
} else if ($actionType == 'resetallview') {
$query = "UPDATE " . sql_table('plugin_views') . " SET views=0";
sql_query($query);
}
$order = requestVar('order');
$sort = requestVar('sort');
header('Location: ' . $CONF['PluginURL'] . 'views/index.php?sort=' . $sort . '&order='.$order);
}
}
?>
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Hoofdstuk: 5. Losse gedachten
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