135 lines
3.8 KiB
PHP
135 lines
3.8 KiB
PHP
<?php
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/**
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* Name: Image View Counter
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* Author: Drudex Software <support@drudexsoftware.com>
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* Link: http://www.drudexsoftware.com/
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* License: GPLv2
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* Description: Tracks & displays how many times an image is viewed
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* Documentation:
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* Whenever anyone views an image, a view will be added to that image.
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* This extension will also track any username & the IP adress.
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* This is done to prevent duplicate views.
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* A person can only count as a view again 1 hour after viewing the image initially.
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*/
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class ImageViewCounter extends Extension {
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private $view_interval = 3600; # allows views to be added each hour
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# Add Setup Block with options for view counter
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public function onSetupBuilding(SetupBuildingEvent $event) {
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$sb = new SetupBlock("Image View Counter");
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$sb->add_bool_option("image_viewcounter_adminonly", "Display view counter only to admin");
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$event->panel->add_block($sb);
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}
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# Adds view to database if needed
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public function onDisplayingImage(DisplayingImageEvent $event) {
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$imgid = $event->image->id; // determines image id
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$this->addview($imgid); // adds a view
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}
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# display views to user or admin below image if allowed
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public function onImageInfoBoxBuilding(ImageInfoBoxBuildingEvent $event) {
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global $user, $config;
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$adminonly = $config->get_bool("image_viewcounter_adminonly"); // todo
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if ($adminonly == false || ($adminonly && $user->is_admin()))
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$event->add_part(
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"<tr><th>Views:</th><td>".
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$this->get_view_count($event->image->id) .
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"</tr>", 38);
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}
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# Installs DB table
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public function onInitExt(InitExtEvent $event) {
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global $database, $config;
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// if the sql table doesn't exist yet, create it
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if($config->get_bool("image_viewcounter_installed") == false) { //todo
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$database->create_table("image_views","
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id SCORE_AIPK,
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image_id INTEGER NOT NULL,
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user_id INTEGER NOT NULL,
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timestamp INTEGER NOT NULL,
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ipaddress SCORE_INET NOT NULL");
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$config->set_bool("image_viewcounter_installed", true);
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}
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}
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/**
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* Adds a view to the item if needed
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* @param int $imgid
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*/
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private function addview($imgid)
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{
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global $database, $user;
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// don't add view if person already viewed recently
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if ($this->can_add_view($imgid) == false) return;
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// Add view for current IP
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$database->execute(
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"
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INSERT INTO image_views (image_id, user_id, timestamp, ipaddress)
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VALUES (:image_id, :user_id, :timestamp, :ipaddress)
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",
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array(
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"image_id" => $imgid,
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"user_id" => $user->id,
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"timestamp" => time(),
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"ipaddress" => $_SERVER['REMOTE_ADDR'],
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)
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);
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}
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/**
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* Returns true if this IP hasn't recently viewed this image
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* @param int $imgid
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*/
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private function can_add_view($imgid)
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{
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global $database;
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// counts views from current IP in the last hour
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$recent_from_ip = (int)$database->get_one(
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"
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SELECT COUNT(*)
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FROM image_views
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WHERE ipaddress=:ipaddress AND timestamp >:lasthour AND image_id =:image_id
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",
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array(
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"ipaddress" => $_SERVER['REMOTE_ADDR'],
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"lasthour" => time() - $this->view_interval,
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"image_id" => $imgid
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)
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);
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// if no views were found with the set criteria, return true
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if($recent_from_ip == 0) return true;
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else return false;
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}
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/**
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* Returns the int of the view count from the given image id
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* @param int $imgid - if not set or 0, return views of all images
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*/
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private function get_view_count($imgid = 0)
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{
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global $database;
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if ($imgid == 0) // return view count of all images
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$view_count = (int)$database->get_one(
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"SELECT COUNT(*) FROM image_views"
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);
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else // return view count of specified image
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$view_count = (int)$database->get_one(
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"SELECT COUNT(*) FROM image_views WHERE image_id =:image_id",
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array("image_id" => $imgid)
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);
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// returns the count as int
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return $view_count;
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}
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}
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