From 1a38a152e6951898a1d5dbf016fb9bacf17c659a Mon Sep 17 00:00:00 2001
From: DrudexSoftware <support@drudexsoftware.com>
Date: Sat, 23 Feb 2013 06:21:00 +0100
Subject: [PATCH] image_view_counter: - added view counter - only adds view
 every hour from same person - no way to display to user/admin yet (todo)

---
 ext/image_view_counter/main.php | 96 +++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 ext/image_view_counter/main.php

diff --git a/ext/image_view_counter/main.php b/ext/image_view_counter/main.php
new file mode 100644
index 00000000..23a2d21b
--- /dev/null
+++ b/ext/image_view_counter/main.php
@@ -0,0 +1,96 @@
+<?php
+/**
+ * Name: Image View Counter
+ * Author: Drudex Software <support@drudexsoftware.com>
+ * Link: http://drudexsoftware.com
+ * License: GPLv2
+ * Description: Tracks & displays how many times an image is viewed
+ * Documentation:
+ *  Whenever anyone views an image, a view will be added to that image.
+ *  This extension will also track any username & the IP adress.
+ *  This is done to prevent duplicate views. 
+ *  A person can only count as a view again 1 hour after viewing the image initially.
+ */
+class image_view_counter extends Extension {    
+        private $view_interval = 3600; # allows views to be added each hour
+    
+        # Add Setup Block with options for view counter
+        public function onSetupBuilding(SetupBuildingEvent $event) {
+            $sb = new SetupBlock("Image View Counter");
+            $sb->add_bool_option("image_viewcounter_adminonly", "Display view counter only to admin");
+
+            $event->panel->add_block($sb);
+	}
+        
+        # Load Analytics tracking code on page request
+        public function onDisplayingImage(DisplayingImageEvent $event) {
+            $imgid = $event->image->id; // determines image id
+            $this->addview($imgid); // adds a view
+        }
+        
+        # Installs DB table
+        public function onInitExt(InitExtEvent $event) {
+            global $database, $config;
+            
+            // if the sql table doesn't exist yet, create it
+            if($config->get_bool("image_viewcounter_installed") == false) {
+                $database->execute("CREATE TABLE image_views (
+                id bigint(20) NOT NULL AUTO_INCREMENT,
+                image_id int(11) NOT NULL,
+                timestamp int(11) NOT NULL,
+                ipaddress varchar(255) NOT NULL, 
+                PRIMARY KEY (id))"); 
+                $config->set_bool("image_viewcounter_installed", true);
+            }
+        }
+        
+        # Adds a view to the item if needed
+        private function addview($imgid)
+        {
+            global $database;
+            // don't add view if person already viewed recently
+            if ($this->can_add_view($imgid) == false) return;
+            
+            // Add view for current IP
+            $database->execute("INSERT INTO image_views (image_id, timestamp, ipaddress)
+                VALUES (:image_id, :timestamp, :ipaddress)", array(
+                    "image_id" => $imgid,
+                    "timestamp" => time(),
+                    "ipaddress" => $_SERVER['REMOTE_ADDR'],
+                ));
+        }
+        
+        # Returns true if this IP hasn't recently viewed this image
+        private function can_add_view($imgid)
+        {
+            global $database;
+            
+            // counts views from current IP in the last hour
+            $recent_from_ip = $database->get_row("SELECT COUNT(*) FROM image_views WHERE
+                ipaddress=:ipaddress AND timestamp >:lasthour AND image_id =:image_id", 
+                    array(  "ipaddress" => $_SERVER['REMOTE_ADDR'],
+                            "lasthour" => time() - $this->view_interval,
+                            "image_id" => $imgid));
+            
+            // if no views were found with the set criteria, return true
+            if($recent_from_ip["COUNT(*)"] == "0") return true;
+            else return false;
+        }
+        
+        # Returns the int of the view count from the given image id
+        // $imgid - if not set or 0, return views of all images
+        private function get_view_count($imgid = 0)
+        {
+            global $database;
+            
+            if ($imgid == 0) // return view count of all images
+                $view_count = $database->get_row("SELECT COUNT(*) FROM image_views");
+            else // return view count of specified image
+                $view_count = $database->get_row("SELECT COUNT(*) FROM image_views WHERE ".
+                    "image_id =:image_id", array("image_id" => $imgid));
+            
+            // returns the count as int
+            return intval($view_count["COUNT(*)"]);
+        }
+}
+?>