issue2, first tag cloud implementation

git-svn-id: file:///var/lib/svn/phpfspot/trunk@93 fa6a889d-dae6-447d-9e79-4ba9a3039384

1 files changed, 44 insertions, 5 deletions

diff --git a/phpfspot.class.php b/phpfspot.class.php
index 0095ca8..af51752 100644
--- a/phpfspot.class.php
+++ b/phpfspot.class.php
@@ -144,13 +144,52 @@ class PHPFSPOT {
 
    public function getAvailableTags()
    {
-      foreach($this->avail_tags as $tag)
-      {
-         if(isset($_SESSION['selected_tags']) && in_array($tag, $_SESSION['selected_tags']))
+      $result = $this->db->db_query("
+         SELECT tag_id as id, count(tag_id) as quantity
+         FROM photo_tags
+         GROUP BY tag_id
+         ORDER BY tag_id ASC
+      ");
+
+      $tags = Array();
+
+      while($row = $this->db->db_fetch_object($result)) {
+         $tags[$row['id']] = $row['quantity'];
+      }
+
+      // change these font sizes if you will
+      $max_size = 125; // max font size in %
+      $min_size = 75; // min font size in %
+
+      // get the largest and smallest array values
+      $max_qty = max(array_values($tags));
+      $min_qty = min(array_values($tags));
+
+      // find the range of values
+      $spread = $max_qty - $min_qty;
+      if (0 == $spread) { // we don't want to divide by zero
+         $spread = 1;
+      }
+
+      // determine the font-size increment
+      // this is the increase per tag quantity (times used)
+      $step = ($max_size - $min_size)/($spread);
+
+      // loop through our tag array
+      foreach ($tags as $key => $value) {
+
+         if(isset($_SESSION['selected_tags']) && in_array($key, $_SESSION['selected_tags']))
             continue;
 
-         // return all available (= not selected) tags
-         print "<a href=\"javascript:Tags('add', ". $tag .");\" class=\"tag\">". $this->tags[$tag] ."</a>&nbsp;";
+          // calculate CSS font-size
+          // find the $value in excess of $min_qty
+          // multiply by the font-size increment ($size)
+          // and add the $min_size set above
+         $size = $min_size + (($value - $min_qty) * $step);
+          // uncomment if you want sizes in whole %:
+          // $size = ceil($size);
+
+         print "<a href=\"javascript:Tags('add', ". $key .");\" class=\"tag\" style=\"font-size: ". $size ."%;\">". $this->tags[$key] ."</a>&nbsp;";
 
       }