make get_random_tag_photo() behave correct when show_tags is set, fixes #81
[phpfspot.git] / phpfspot.class.php
index 97deb968dacb5b6b98dd967d73a379480f4bf21d..ba33c89af6f18f319d8a4f033437e8de3bd89275 100644 (file)
@@ -122,7 +122,8 @@ class PHPFSPOT {
 
       /* set application name and version information */
       $this->cfg->product = "phpfspot";
-      $this->cfg->version = "1.5";
+      $this->cfg->version = "1.7";
+      $this->cfg->db_version = 2;
 
       $this->sort_orders= array(
          'date_asc' => 'Date ↑',
@@ -142,7 +143,9 @@ class PHPFSPOT {
 
       /* Check if database file is writeable */
       if(!is_writeable($this->cfg->fspot_db)) {
-         print $this->cfg->fspot_db ." is not writeable for user ". $this->getuid() ."\n";
+         print "Error: ". $this->cfg->fspot_db ." is not writeable for user ". $this->getuid() .".\n";
+         print "Please fix permissions so phpfspot can create indices within the F-Spot database to"
+            ." speed up some database operations.\n";
          exit(1);
       }
 
@@ -157,6 +160,7 @@ class PHPFSPOT {
          ");
       }
 
+      /* get F-Spot database version */
       $this->dbver = $this->getFspotDBVersion();
 
       if(!is_writeable($this->cfg->base_path ."/templates_c")) {
@@ -173,13 +177,15 @@ class PHPFSPOT {
 
       /* Check if directory where the database file is stored is writeable  */
       if(!is_writeable(dirname($this->cfg->phpfspot_db))) {
-         print dirname($this->cfg->phpfspot_db) .": directory is not writeable for user ". $this->getuid() ."\n";
+         print "Error: ". dirname($this->cfg->phpfspot_db) .": directory is not writeable for user ". $this->getuid() .".\n";
+         print "Please fix permissions so phpfspot can create its own sqlite database to store some settings.\n";
          exit(1);
       }
 
       /* Check if database file is writeable */
       if(!is_writeable($this->cfg->phpfspot_db)) {
-         print $this->cfg->phpfspot_db ." is not writeable for user ". $this->getuid() ."\n";
+         print "Error: ". $this->cfg->phpfspot_db ." is not writeable for user ". $this->getuid() .".\n";
+         print "Please fix permissions so phpfspot can create its own sqlite database to store some settings.\n";
          exit(1);
       }
 
@@ -195,12 +201,23 @@ class PHPFSPOT {
       }
 
       /* Check if some tables need to be created */
-      $this->check_config_table();
+      $this->check_phpfspot_db();
 
       /* overload Smarty class with our own template handler */
       require_once "phpfspot_tmpl.php";
       $this->tmpl = new PHPFSPOT_TMPL();
 
+      $this->tmpl->assign('web_path', $this->cfg->web_path);
+
+      /* Starting with F-Spot 0.4.2, the rating-feature was available */
+      if($this->dbver > 10) {
+         $this->tmpl->assign('has_rating', true);
+         $this->sort_orders = array_merge($this->sort_orders, array(
+            'rate_asc' => 'Rate ↑',
+            'rate_desc' => 'Rate ↓',
+         ));
+      }
+
       /* check if all necessary indices exist */
       $this->checkDbIndices();
 
@@ -211,8 +228,9 @@ class PHPFSPOT {
       if(!isset($_SESSION['tag_condition']))
          $_SESSION['tag_condition'] = 'or';
 
+      /* if sort-order has not been set yet, get the one specified in the config */
       if(!isset($_SESSION['sort_order']))
-         $_SESSION['sort_order'] = 'date_desc';
+         $_SESSION['sort_order'] = $this->cfg->sort_order;
 
       if(!isset($_SESSION['searchfor_tag']))
          $_SESSION['searchfor_tag'] = '';
@@ -221,6 +239,11 @@ class PHPFSPOT {
       if(isset($_SESSION['begin_with']) && $this->cfg->thumbs_per_page == 0)
          unset($_SESSION['begin_with']);
 
+      // if user-friendly-url's are enabled, set also a flag for the template handler
+      if($this->is_user_friendly_url()) {
+         $this->tmpl->assign('user_friendly_url', 'true');
+      }
+
    } // __construct()
 
    public function __destruct()
@@ -244,6 +267,11 @@ class PHPFSPOT {
       $this->tmpl->assign('current_condition', $_SESSION['tag_condition']);
       $this->tmpl->assign('template_path', 'themes/'. $this->cfg->theme_name);
 
+      /* parse URL */
+      if($this->is_user_friendly_url()) {
+         $content = $this->parse_user_friendly_url($_SERVER['REQUEST_URI']);
+      }
+
       if(isset($_GET['mode'])) {
 
          $_SESSION['start_action'] = $_GET['mode'];
@@ -266,6 +294,8 @@ class PHPFSPOT {
                   $_SESSION['start_action'] = 'showp';
                }
                if(isset($_GET['id']) && is_numeric($_GET['id'])) {
+                  if($_SESSION['current_photo'] != $_GET['id'])
+                     unset($_SESSION['current_version']);
                   $_SESSION['current_photo'] = $_GET['id'];
                   $_SESSION['start_action'] = 'showp';
                }
@@ -277,11 +307,15 @@ class PHPFSPOT {
                }
                break;
             case 'export':
-               $this->tmpl->show("export.tpl");
+               /* fetch export template */
+               print $this->tmpl->fetch("export.tpl");
+               /* no further execution necessary. */
                return;
                break;
             case 'slideshow':
-               $this->tmpl->show("slideshow.tpl");
+               /* fetch slideshow template */
+               print $this->tmpl->show("slideshow.tpl");
+               /* no further execution necessary. */
                return;
                break;
             case 'rss':
@@ -300,13 +334,47 @@ class PHPFSPOT {
          }
       }
 
+      /* if date-search variables are registered in the session, set the check
+         for "consider date-range" in the html output
+      */
       if(isset($_SESSION['from_date']) && isset($_SESSION['to_date']))
          $this->tmpl->assign('date_search_enabled', true);
 
+      /* if rate-search variables are registered in the session, set the check
+         for "consider rate-range" in the html output
+      */
+      if(isset($_SESSION['rate_from']) && isset($_SESSION['rate_to'])) {
+         $this->tmpl->assign('rate_search_enabled', true);
+      }
+
       $this->tmpl->register_function("sort_select_list", array(&$this, "smarty_sort_select_list"), false);
-      $this->tmpl->assign('from_date', $this->get_calendar('from'));
-      $this->tmpl->assign('to_date', $this->get_calendar('to'));
-      $this->tmpl->assign('content_page', 'welcome.tpl');
+      $this->tmpl->assign('search_from_date', $this->get_date_text_field('from'));
+      $this->tmpl->assign('search_to_date', $this->get_date_text_field('to'));
+
+      $this->tmpl->assign('preset_selected_tags', $this->getSelectedTags());
+      $this->tmpl->assign('preset_available_tags', $this->getAvailableTags());
+      $this->tmpl->assign('rate_search', $this->get_rate_search());
+
+      /* if no site-content has been set yet... */
+      if(!isset($content)) {
+         /* if tags are already selected, we can immediately display photo-index */
+         if((isset($_SESSION['selected_tags']) && !empty($_SESSION['selected_tags']) &&
+             isset($_SESSION['start_action']) && $_SESSION['start_action'] != 'showp') ||
+            (isset($_SESSION['start_action']) && $_SESSION['start_action'] == 'showpi'))
+            $this->tmpl->assign('initial_content', $this->showPhotoIndex());
+         else {
+            /* if a photo is already selected, we can immediately display single-photo */
+            if(isset($_SESSION['current_photo']) && !empty($_SESSION['current_photo']))
+               $this->tmpl->assign('initial_content', $this->showPhoto($_SESSION['current_photo']));
+            else {
+               /* ok, then let us show the welcome page... */
+               $this->tmpl->assign('initial_content', $this->tmpl->fetch('welcome.tpl'));
+            }
+         }
+      }
+      else
+         $this->tmpl->assign('initial_content', $content);
+
       $this->tmpl->show("index.tpl");
 
    } // show()
@@ -327,11 +395,16 @@ class PHPFSPOT {
       $this->avail_tags = Array();
       $count = 0;
    
+      /* if show_tags has been set in the configuration (only show photos
+         which are tagged by these tags) they following will take care,
+         that only these other tags are displayed where the photo is also
+         tagged with one of show_tags.
+      */
       if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
          $query_str="
             SELECT
                DISTINCT t1.id as id, t1.name as name
-            FROM  
+            FROM
                photo_tags pt1
             INNER JOIN photo_tags
                pt2 ON pt1.photo_id=pt2.photo_id
@@ -385,15 +458,21 @@ class PHPFSPOT {
    } // get_tags()
 
    /** 
-    * extract all photo details
+    * get all photo details from F-Spot database
     * 
-    * retrieve all available details from f-spot's
-    * database and return them as object
+    * this function queries the F-Spot database for all available
+    * details of the requested photo. It returns them as a object.
+    *
+    * Furthermore it takes care of the photo version to be requested.
+    * If photo version is not yet, it queries information for the
+    * original photo.
+    *
     * @param integer $idx
     * @return object|null
     */
-   public function get_photo_details($idx)
+   public function get_photo_details($idx, $version_idx = NULL)
    {
+      /* ~ F-Spot version 0.3.x */
       if($this->dbver < 9) {
          $query_str = "
             SELECT p.id, p.name, p.time, p.directory_path, p.description
@@ -401,14 +480,24 @@ class PHPFSPOT {
          ";
       }
       else {
-         $query_str = "
-            SELECT p.id, p.uri, p.time, p.description
-            FROM photos p
-         ";
+         /* till F-Spot version 0.4.1 */
+         if($this->dbver < 11) {
+            $query_str = "
+               SELECT p.id, p.uri, p.time, p.description
+               FROM photos p
+            ";
+         }
+         else {
+            /* rating value got introduced */
+            $query_str = "
+               SELECT p.id, p.uri, p.time, p.description, p.rating
+               FROM photos p
+            ";
+         }
       }
 
-      /* if show_tags is set, only return details for photos which
-         are specified to be shown
+      /* if show_tags is set, only return details of photos which are
+         tagged with a tag that has been specified to be shown.
       */
       if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
          $query_str.= "
@@ -425,28 +514,55 @@ class PHPFSPOT {
          ";
       }
 
-      if($result = $this->db->db_query($query_str)) {
-
-         $row = $this->db->db_fetch_object($result);
+      if($row = $this->db->db_fetchSingleRow($query_str)) {
 
+         /* before F-Spot db version 9 there was no uri column but
+            seperated fields for directory_path and name (= filename).
+         */
          if($this->dbver < 9) {
             $row['uri'] = "file://". $row['directory_path'] ."/". $row['name'];
          }
 
+         /* if version-idx has not yet been set, get the latest photo version */
+         if(!isset($version_idx) || !$this->is_valid_version($idx, $version_idx))
+            $version_idx = $this->get_latest_version($idx);
+
+         /* if an alternative version has been requested */
+         if($version_idx > 0) {
+
+            /* check for alternative versions */
+            if($version = $this->db->db_fetchSingleRow("
+                  SELECT
+                     version_id, name, uri
+                  FROM
+                     photo_versions
+                  WHERE
+                     photo_id LIKE '". $idx ."'
+                  AND
+                     version_id LIKE '". $version_idx ."'
+            ")) {
+
+               $row['name'] = $version['name'];
+               $row['uri'] = $version['uri'];
+
+            }
+         }
+
          return $row;
 
       }
-   
+
       return null;
 
-   } // get_photo_details
+   } // get_photo_details()
 
    /**
     * returns aligned photo names 
     *
-    * this function returns aligned (length) names for
-    * an specific photo. If the length of the name exceeds
-    * $limit the name will be shrinked (...)
+    * this function returns aligned (length) names for a specific photo.
+    * If the length of the name exceeds $limit the name will bei
+    * shrinked (...).
+    *
     * @param integer $idx
     * @param integer $limit
     * @return string|null
@@ -464,12 +580,81 @@ class PHPFSPOT {
 
    } // getPhotoName()
 
+   /**
+    * get photo rating level
+    *
+    * this function will return the integer-based rating level of a
+    * photo. This can only be done, if the F-Spot database is at a
+    * specific version. If rating value can not be found, zero will
+    * be returned indicating no rating value is available.
+    *
+    * @param integer idx
+    * @return integer
+    */
+   public function get_photo_rating($idx)
+   {
+      if($detail = $this->get_photo_details($idx)) {
+         if(isset($detail['rating']))
+            return $detail['rating'];
+      }
+
+      return 0;
+
+   } // get_photo_rating()
+
+   /**
+    * get rate-search bars
+    *
+    * this function will return the rating-bars for the search field.
+    *
+    * @return string
+    */
+   public function get_rate_search()
+   {
+      $bar = "";
+
+      for($i = 1; $i <= 5; $i++) {
+
+         $bar.= "<img id=\"rate_from_". $i ."\" src=\"";
+
+         if(isset($_SESSION['rate_from']) && $i <= $_SESSION['rate_from'])
+            $bar.= $this->cfg->web_path ."/resources/star.png";
+         else
+            $bar.= $this->cfg->web_path ."/resources/empty_rate.png";
+
+         $bar.= "\"
+            onmouseover=\"show_rate('from', ". $i .");\"
+            onmouseout=\"reset_rate('from');\"
+            onclick=\"set_rate('from', ". $i .")\" />";
+      }
+
+      $bar.= "<br />\n";
+
+       for($i = 1; $i <= 5; $i++) {
+
+         $bar.= "<img id=\"rate_to_". $i ."\" src=\"";
+
+         if(isset($_SESSION['rate_to']) && $i <= $_SESSION['rate_to'])
+            $bar.= $this->cfg->web_path ."/resources/star.png";
+         else
+            $bar.= $this->cfg->web_path ."/resources/empty_rate.png";
+
+         $bar.= "\"
+            onmouseover=\"show_rate('to', ". $i .");\"
+            onmouseout=\"reset_rate('to');\"
+            onclick=\"set_rate('to', ". $i .");\" />";
+      }
+
+      return $bar;
+
+   } // get_rate_search()
+
    /**
     * shrink text according provided limit
     *
-    * If the length of the name exceeds $limit the
-    * text will be shortend and some content in between
-    * will be replaced with "..." 
+    * If the length of the name exceeds $limit, text will be shortend
+    * and inner content will be replaced with "...".
+    *
     * @param string $ext
     * @param integer $limit
     * @return string
@@ -544,7 +729,16 @@ class PHPFSPOT {
       }
 
       $orig_path = $this->translate_path($this->parse_uri($details['uri'], 'fullpath'));
-      $thumb_path = $this->get_thumb_path($this->cfg->photo_width, $photo);
+
+      /* if current version is already set, use it */
+      if($this->get_current_version() !== false)
+         $version = $this->get_current_version();
+
+      /* if version not set yet, we assume to display the latest version */
+      if(!isset($version) || !$this->is_valid_version($photo, $version))
+         $version = $this->get_latest_version($photo);
+
+      $thumb_path = $this->get_thumb_path($this->cfg->photo_width, $photo, $version);
 
       if(!file_exists($orig_path)) {
          $this->_error("Photo ". $orig_path ." does not exist!<br />\n");
@@ -559,14 +753,14 @@ class PHPFSPOT {
       /* If the thumbnail doesn't exist yet, try to create it */
       if(!file_exists($thumb_path)) {
          $this->gen_thumb($photo, true);
-         $thumb_path = $this->get_thumb_path($this->cfg->photo_width, $photo);
+         $thumb_path = $this->get_thumb_path($this->cfg->photo_width, $photo, $version);
       }
 
       /* get mime-type, height and width from the original photo */
       $info = getimagesize($orig_path);
 
       /* get EXIF information if JPEG */
-      if($info['mime'] == "image/jpeg") {
+      if(isset($info['mime']) && $info['mime'] == "image/jpeg") {
          $meta = $this->get_meta_informations($orig_path);
       }
 
@@ -577,7 +771,6 @@ class PHPFSPOT {
          $meta_res = $info[0] ."x". $info[1]; 
       }
 
-      $meta_date = isset($meta['FileDateTime']) ? strftime("%a %x %X", $meta['FileDateTime']) : "n/a";
       $meta_make = isset($meta['Make']) ? $meta['Make'] ." / ". $meta['Model'] : "n/a";
       $meta_size = isset($meta['FileSize']) ? round($meta['FileSize']/1024, 1) ."kbyte" : "n/a";
 
@@ -601,37 +794,54 @@ class PHPFSPOT {
 
       $this->tmpl->assign('description', $details['description']);
       $this->tmpl->assign('image_name', $this->parse_uri($details['uri'], 'filename'));
+      $this->tmpl->assign('image_rating', $this->get_photo_rating($photo));
 
       $this->tmpl->assign('width', $info_thumb[0]);
       $this->tmpl->assign('height', $info_thumb[1]);
-      $this->tmpl->assign('ExifMadeOn', $meta_date);
+      $this->tmpl->assign('ExifMadeOn', strftime("%a %x %X", $details['time']));
       $this->tmpl->assign('ExifMadeWith', $meta_make);
       $this->tmpl->assign('ExifOrigResolution', $meta_res);
       $this->tmpl->assign('ExifFileSize', $meta_size);
  
-      $this->tmpl->assign('image_url', 'phpfspot_img.php?idx='. $photo ."&amp;width=". $this->cfg->photo_width);
-      $this->tmpl->assign('image_url_full', 'phpfspot_img.php?idx='. $photo);
+      if($this->is_user_friendly_url()) {
+         $this->tmpl->assign('image_url', '/photo/'. $photo ."/". $this->cfg->photo_width .'/'. $version);
+         $this->tmpl->assign('image_url_full', '/photo/'. $photo);
+      }
+      else {
+         $this->tmpl->assign('image_url', 'phpfspot_img.php?idx='. $photo ."&amp;width=". $this->cfg->photo_width ."&amp;version=". $version);
+         $this->tmpl->assign('image_url_full', 'phpfspot_img.php?idx='. $photo);
+      }
+
       $this->tmpl->assign('image_filename', $this->parse_uri($details['uri'], 'filename'));
 
       $this->tmpl->assign('tags', $this->get_photo_tags($photo));
       $this->tmpl->assign('current_page', $this->getCurrentPage($current, $count));
       $this->tmpl->assign('current_img', $photo);
 
-      if($previous_img) {
-         $this->tmpl->assign('previous_url', "javascript:showImage(". $previous_img .");");
+      if(isset($previous_img)) {
+         $this->tmpl->assign('previous_url', "javascript:showPhoto(". $previous_img .");");
          $this->tmpl->assign('prev_img', $previous_img);
       }
 
-      if($next_img) {
-         $this->tmpl->assign('next_url', "javascript:showImage(". $next_img .");");
+      if(isset($next_img)) {
+         $this->tmpl->assign('next_url', "javascript:showPhoto(". $next_img .");");
          $this->tmpl->assign('next_img', $next_img);
       }
+
       $this->tmpl->assign('mini_width', $this->cfg->mini_width);
       $this->tmpl->assign('photo_width', $this->cfg->photo_width);
       $this->tmpl->assign('photo_number', $i);
       $this->tmpl->assign('photo_count', count($all_photos));
+      $this->tmpl->assign('photo', $photo);
+      $this->tmpl->assign('version', $version);
+
+      /* if the photo as alternative versions, set a flag for the template */
+      if($this->get_photo_versions($photo))
+         $this->tmpl->assign('has_versions', true);
+
+      $this->tmpl->register_function("photo_version_select_list", array(&$this, "smarty_photo_version_select_list"), false);
 
-      $this->tmpl->show("single_photo.tpl");
+      return $this->tmpl->fetch("single_photo.tpl");
 
    } // showPhoto()
 
@@ -690,6 +900,9 @@ class PHPFSPOT {
       // loop through our tag array
       foreach ($tags as $key => $value) {
 
+         /* has the currently processed tag already been added to
+            the selected tag list? if so, ignore it here...
+         */
          if(isset($_SESSION['selected_tags']) && in_array($key, $_SESSION['selected_tags']))
             continue;
 
@@ -698,7 +911,7 @@ class PHPFSPOT {
          // 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 %:
+         // uncomment if you want sizes in whole %:
          $size = ceil($size);
 
          $color = $min_sat + ($value - $min_qty) * $step_sat;
@@ -708,13 +921,25 @@ class PHPFSPOT {
          $b = '88';
 
          if(isset($this->tags[$key])) {
-            $output.= "<a href=\"javascript:Tags('add', ". $key .");\" class=\"tag\" style=\"font-size: ". $size ."%; color: #". $r.$g.$b .";\">". $this->tags[$key] ."</a>, ";
+            if($this->is_user_friendly_url()) {
+               $output.= "<a href=\"". $this->cfg->web_path ."/tag/". $key ."\"
+                  onclick=\"Tags('add', ". $key ."); return false;\"
+                  class=\"tag\"
+                  style=\"font-size: ". $size ."%; color: #". $r.$g.$b .";\"
+                  title=\"Tag ". $this->tags[$key] .", ". $tags[$key] ." picture(s)\">". $this->tags[$key] ."</a>, ";
+            }
+            else {
+               $output.= "<a href=\"". $this->cfg->web_path ."/index.php?mode=showpi\"
+                  onclick=\"Tags('add', ". $key ."); return false;\"
+                  class=\"tag\"
+                  style=\"font-size: ". $size ."%; color: #". $r.$g.$b .";\"
+                  title=\"Tag ". $this->tags[$key] .", ". $tags[$key] ." picture(s)\">". $this->tags[$key] ."</a>, ";
+            }
          }
-
       }
 
       $output = substr($output, 0, strlen($output)-2);
-      print $output;
+      return $output;
 
    } // getAvailableTags()
 
@@ -745,17 +970,10 @@ class PHPFSPOT {
                   break;
                case 'img':
                   $output.= "
-                  <div style=\"display: table-cell;\">
-                   <div style=\"display: table-row; text-align: center;\">
-                    <a href=\"javascript:Tags('del', ". $tag .");\" title=\"". $this->tags[$tag] ."\">
-                     <img src=\"phpfspot_img.php?tagidx=". $tag ."\" />
-                    </a>
-                   </div>
-                   <div style=\"display: table-row; text-align: center;\">
-                    <a href=\"javascript:Tags('del', ". $tag .");\" title=\"". $this->tags[$tag] ."\">
-                     <img src=\"resources/underbar.png\" />
-                    </a>
-                   </div>
+                  <div class=\"tagresulttag\">
+                   <a href=\"javascript:Tags('del', ". $tag .");\" title=\"". $this->tags[$tag] ."\">
+                    <img src=\"". $this->cfg->web_path ."/phpfspot_img.php?tagidx=". $tag ."\" />
+                   </a>
                   </div>
                   ";
                   break;
@@ -839,7 +1057,7 @@ class PHPFSPOT {
    } // resetTags()
 
    /**
-    * returns the value for the autocomplet tag-search
+    * returns the value for the autocomplete tag-search
     * @return string
     */
    public function get_xml_tag_list()
@@ -901,6 +1119,9 @@ class PHPFSPOT {
       if(isset($_SESSION['current_photo']))
          unset($_SESSION['current_photo']);
 
+      if(isset($_SESSION['current_version']))
+         unset($_SESSION['current_version']);
+
    } // resetPhotoView();
 
    /**
@@ -930,8 +1151,7 @@ class PHPFSPOT {
    /**
     * reset date search
     *
-    * if any date search has taken place, reset
-    * it now
+    * if any date search has taken place, reset it now.
     */
    public function resetDateSearch()
    {
@@ -942,6 +1162,20 @@ class PHPFSPOT {
 
    } // resetDateSearch();
 
+   /**
+    * reset rate search
+    *
+    * if any rate search has taken place, reset it now.
+    */
+   public function resetRateSearch()
+   {
+      if(isset($_SESSION['rate_from']))
+         unset($_SESSION['rate_from']);
+      if(isset($_SESSION['rate_to']))
+         unset($_SESSION['rate_to']);
+
+   } // resetRateSearch();
+
    /**
     * return all photo according selection
     *
@@ -967,6 +1201,12 @@ class PHPFSPOT {
       } 
 
       if(isset($_SESSION['searchfor_name'])) {
+
+         /* check for previous conditions. if so add 'AND' */
+         if(!empty($additional_where_cond)) {
+            $additional_where_cond.= " AND ";
+         }
+
          if($this->dbver < 9) {
             $additional_where_cond.= "
                   (
@@ -987,6 +1227,24 @@ class PHPFSPOT {
          }
       }
 
+      /* limit result based on rate-search */
+      if(isset($_SESSION['rate_from']) && isset($_SESSION['rate_to'])) {
+
+         if($this->dbver > 10) {
+
+            /* check for previous conditions. if so add 'AND' */
+            if(!empty($additional_where_cond)) {
+               $additional_where_cond.= " AND ";
+            }
+
+            $additional_where_cond.= "
+                     p.rating >= ". $_SESSION['rate_from'] ."
+                  AND
+                     p.rating <= ". $_SESSION['rate_to'] ."
+            ";
+         }
+      }
+
       if(isset($_SESSION['sort_order'])) {
          $order_str = $this->get_sort_order();
       }
@@ -1006,7 +1264,7 @@ class PHPFSPOT {
                ON pt2.tag_id=t2.id
             WHERE t.name LIKE '%". $_SESSION['searchfor_tag'] ."%' ";
 
-         if(isset($additional_where_cond) && !empty($additional_where_cond))
+         if(!empty($additional_where_cond))
             $query_str.= "AND ". $additional_where_cond ." ";
 
          if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
@@ -1043,7 +1301,7 @@ class PHPFSPOT {
                   ON pt1.photo_id=p.id
                WHERE pt1.tag_id IN (". $selected .")
             ";
-            if(isset($additional_where_cond) && !empty($additional_where_cond)) 
+            if(!empty($additional_where_cond))
                $query_str.= "AND ". $additional_where_cond ." ";
 
             if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
@@ -1099,7 +1357,7 @@ class PHPFSPOT {
                   AND pt". ($i+2) .".tag_id=". $_SESSION['selected_tags'][$i] ."
                "; 
             }
-            if(isset($additional_where_cond) && !empty($additional_where_cond)) 
+            if(!empty($additional_where_cond))
                $query_str.= "AND ". $additional_where_cond;
 
             if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
@@ -1128,11 +1386,11 @@ class PHPFSPOT {
             ON pt.tag_id=t.id
       ";
 
-      if(isset($additional_where_cond) && !empty($additional_where_cond)) 
+      if(!empty($additional_where_cond))
          $query_str.= "WHERE ". $additional_where_cond ." ";
 
       if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
-         if(isset($additional_where_cond) && !empty($additional_where_cond))
+         if(!empty($additional_where_cond))
             $query_str.= "AND t.name IN ('".implode("','",$this->cfg->show_tags). "')";
          else
             $query_str.= "WHERE t.name IN ('".implode("','",$this->cfg->show_tags). "')";
@@ -1154,10 +1412,12 @@ class PHPFSPOT {
     *
     * this function provides all the necessary information
     * for the photo index template.
+    * @return string
     */
    public function showPhotoIndex()
    {
       $photos = $this->getPhotoSelection();
+      $current_tags = $this->getCurrentTags();
 
       $count = count($photos);
 
@@ -1187,6 +1447,7 @@ class PHPFSPOT {
       $img_name[$thumbs] = Array();
       $img_fullname[$thumbs] = Array();
       $img_title = Array();
+      $img_rating = Array();
 
       for($i = $begin_with; $i < $end_with; $i++) {
 
@@ -1197,8 +1458,9 @@ class PHPFSPOT {
             $img_name[$thumbs] = htmlspecialchars($this->getPhotoName($photos[$i], 15));
             $img_fullname[$thumbs] = htmlspecialchars($this->getPhotoName($photos[$i], 0));
             $img_title[$thumbs] = "Click to view photo ". htmlspecialchars($this->getPhotoName($photos[$i], 0));
+            $img_rating[$thumbs] = $this->get_photo_rating($photos[$i]);
 
-            $thumb_path = $this->get_thumb_path($this->cfg->thumb_width, $photos[$i]);
+            $thumb_path = $this->get_thumb_path($this->cfg->thumb_width, $photos[$i], $this->get_latest_version($photos[$i]));
 
             if(file_exists($thumb_path)) {
                $info = getimagesize($thumb_path); 
@@ -1265,7 +1527,16 @@ class PHPFSPOT {
             else
                $style = "";
 
-            $select = "<a href=\"javascript:showPhotoIndex(". (($i*$photo_per_page)-$photo_per_page) .");\"";
+            $start_with = ($i*$photo_per_page)-$photo_per_page;
+
+            if($this->is_user_friendly_url()) {
+               $select = "<a href=\"". $this->cfg->web_path ."/tag/205/". $start_with ."\"";
+            }
+            else {
+               $select = "<a href=\"". $this->cfg->web_path ."/index.php?mode=showpi&nbsp;tags=". $current_tags ."&nbsp;begin_with=". $begin_with ."\"";
+            }
+            $select.= " onclick=\"showPhotoIndex(". $start_with ."); return false;\"";
+
                if($style != "")
                   $select.= $style;
             $select.= ">". $i ."</a>&nbsp;";
@@ -1303,9 +1574,7 @@ class PHPFSPOT {
          if($last_page > 1)
             $this->tmpl->assign('page_selector', $page_select);
       }
-
       
-      $current_tags = $this->getCurrentTags();
       $extern_link = "index.php?mode=showpi";
       $rss_link = "index.php?mode=rss";
       if($current_tags != "") {
@@ -1336,20 +1605,23 @@ class PHPFSPOT {
       $this->tmpl->assign('img_name', $img_name);
       $this->tmpl->assign('img_fullname', $img_fullname);
       $this->tmpl->assign('img_title', $img_title);
+      $this->tmpl->assign('img_rating', $img_rating);
       $this->tmpl->assign('thumbs', $thumbs);
       $this->tmpl->assign('selected_tags', $this->getSelectedTags('img'));
 
-      $this->tmpl->show("photo_index.tpl");
+      $result = $this->tmpl->fetch("photo_index.tpl");
 
       /* if we are returning to photo index from an photo-view,
          scroll the window to the last shown photo-thumbnail.
          after this, unset the last_photo session variable.
       */
       if(isset($_SESSION['last_photo'])) {
-         print "<script language=\"JavaScript\">moveToThumb(". $_SESSION['last_photo'] .");</script>\n";
+         $result.= "<script language=\"JavaScript\">moveToThumb(". $_SESSION['last_photo'] .");</script>\n";
          unset($_SESSION['last_photo']);
       }
 
+      return $result;
+
    } // showPhotoIndex()
 
    /**
@@ -1398,23 +1670,25 @@ class PHPFSPOT {
             $flip_hori = false;
             $flip_vert = false;
 
-            switch($meta['Orientation']) {
-               case 1: /* top, left */
-                  /* nothing to do */ break;
-               case 2: /* top, right */
-                  $rotate = 0; $flip_hori = true; break;
-               case 3: /* bottom, left */
-                  $rotate = 180; break;
-               case 4: /* bottom, right */
-                  $flip_vert = true; break;
-               case 5: /* left side, top */
-                  $rotate = 90; $flip_vert = true; break;
-               case 6: /* right side, top */
-                  $rotate = 90; break;
-               case 7: /* left side, bottom */
-                  $rotate = 270; $flip_vert = true; break;
-               case 8: /* right side, bottom */
-                  $rotate = 270; break;
+            if(isset($meta['Orientation'])) {
+               switch($meta['Orientation']) {
+                  case 1: /* top, left */
+                     /* nothing to do */ break;
+                  case 2: /* top, right */
+                     $rotate = 0; $flip_hori = true; break;
+                  case 3: /* bottom, left */
+                     $rotate = 180; break;
+                  case 4: /* bottom, right */
+                     $flip_vert = true; break;
+                  case 5: /* left side, top */
+                     $rotate = 90; $flip_vert = true; break;
+                  case 6: /* right side, top */
+                     $rotate = 90; break;
+                  case 7: /* left side, bottom */
+                     $rotate = 270; $flip_vert = true; break;
+                  case 8: /* right side, bottom */
+                     $rotate = 270; break;
+               }
             }
 
             $src_img = @imagecreatefromjpeg($orig_image);
@@ -1621,25 +1895,133 @@ class PHPFSPOT {
     * if it does not exist yet. this own is used to store
     * some necessary informations (md5 sum's, ...).
     */
-   public function check_config_table()
+   public function check_phpfspot_db()
    {
       // if the config table doesn't exist yet, create it
       if(!$this->cfg_db->db_check_table_exists("images")) {
          $this->cfg_db->db_exec("
             CREATE TABLE images (
-               img_idx int primary key,
-               img_md5 varchar(32)
+               img_idx int,
+               img_version_idx int,
+               img_md5 varchar(32),
+               UNIQUE(img_idx, img_version_idx)
+            )
+         ");
+      }
+
+      if(!$this->cfg_db->db_check_table_exists("meta")) {
+         $this->cfg_db->db_exec("
+            CREATE TABLE meta (
+               meta_key varchar(255),
+               meta_value varchar(255)
+            )
+         ");
+
+         /* db_version was added with phpfspot 1.7, before changes
+            on the phpfspot database where not necessary.
+         */
+
+         $this->cfg_db->db_exec("
+            INSERT INTO meta (
+               meta_key, meta_value
+            ) VALUES (
+               'phpfspot Database Version',
+               '". $this->cfg->db_version ."'
+            )
+         ");
+      }
+
+      /* if version <= 2 and column img_version_idx does not exist yet */
+      if($this->get_db_version() <= 2 &&
+         !$this->cfg_db->db_check_column_exists("images", "img_version_idx")) {
+
+         if(!$this->cfg_db->db_start_transaction())
+            die("Can not start database transaction");
+
+         $result = $this->cfg_db->db_exec("
+            CREATE TEMPORARY TABLE images_temp (
+               img_idx int,
+               img_version_idx int,
+               img_md5 varchar(32),
+               UNIQUE(img_idx, img_version_idx)
+            )
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         $result = $this->cfg_db->db_exec("
+           INSERT INTO images_temp
+               SELECT
+                  img_idx,
+                  0,
+                  img_md5
+               FROM images
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         $result = $this->cfg_db->db_exec("
+            DROP TABLE images
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         $result = $this->cfg_db->db_exec("
+            CREATE TABLE images (
+               img_idx int,
+               img_version_idx int,
+               img_md5 varchar(32),
+               UNIQUE(img_idx, img_version_idx)
             )
-            ");
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         $result = $this->cfg_db->db_exec("
+            INSERT INTO images
+               SELECT *
+               FROM images_temp
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         $result = $this->cfg_db->db_exec("
+            DROP TABLE images_temp
+         ");
+
+         if(!$result) {
+            $this->cfg_db->db_rollback_transaction();
+            die("Upgrade failed - transaction rollback");
+         }
+
+         if(!$this->cfg_db->db_commit_transaction())
+            die("Can not commit database transaction");
+
       }
 
-   } // check_config_table
+   } // check_phpfspot_db
 
    /**
-    * Generates a thumbnail from photo idx
+    * generates thumbnails
     *
-    * This function will generate JPEG thumbnails from provided F-Spot photo
-    * indizes.
+    * This function generates JPEG thumbnails from
+    * provided F-Spot photo indize and its alternative
+    * versions.
     *
     * 1. Check if all thumbnail generations (width) are already in place and
     *    readable
@@ -1652,6 +2034,7 @@ class PHPFSPOT {
    public function gen_thumb($idx = 0, $force = 0, $overwrite = false)
    {
       $error = 0;
+      $versions = Array(0);
 
       $resolutions = Array(
          $this->cfg->thumb_width,
@@ -1660,110 +2043,125 @@ class PHPFSPOT {
          30,
       );
 
-      /* get details from F-Spot's database */
-      $details = $this->get_photo_details($idx);
+      if($alt_versions = $this->get_photo_versions($idx))
+         $versions = array_merge($versions, $alt_versions);
 
-      /* calculate file MD5 sum */
-      $full_path = $this->translate_path($this->parse_uri($details['uri'], 'fullpath'));
+      foreach($versions as $version) {
 
-      if(!file_exists($full_path)) {
-         $this->_error("File ". $full_path ." does not exist\n");
-         return;
-      }
+         /* get details from F-Spot's database */
+         $details = $this->get_photo_details($idx, $version);
 
-      if(!is_readable($full_path)) {
-         $this->_error("File ". $full_path ." is not readable for ". $this->getuid() ."\n");
-         return;
-      }
+         /* calculate file MD5 sum */
+         $full_path = $this->translate_path($this->parse_uri($details['uri'], 'fullpath'));
+
+         if(!file_exists($full_path)) {
+            $this->_error("File ". $full_path ." does not exist\n");
+            return;
+         }
+
+         if(!is_readable($full_path)) {
+            $this->_error("File ". $full_path ." is not readable for ". $this->getuid() ."\n");
+            return;
+         }
 
-      $this->_debug("Image [". $idx ."] ". $this->shrink_text($this->parse_uri($details['uri'], 'filename'), 20) ." Thumbnails:");
+         $this->_debug("Image [". $idx ."] ". $this->shrink_text($this->parse_uri($details['uri'], 'filename'), 20) ." Thumbnails:");
 
-      /* If Nikon NEF format, we need to treat it another way */
-      if(isset($this->cfg->dcraw_bin) &&
-         file_exists($this->cfg->dcraw_bin) &&
-         is_executable($this->cfg->dcraw_bin) &&
-         preg_match('/\.nef$/i', $details['uri'])) {
+         /* If Nikon NEF format, we need to treat it another way */
+         if(isset($this->cfg->dcraw_bin) &&
+            file_exists($this->cfg->dcraw_bin) &&
+            is_executable($this->cfg->dcraw_bin) &&
+            preg_match('/\.nef$/i', $details['uri'])) {
 
-         $ppm_path = preg_replace('/\.nef$/i', '.ppm', $full_path);
+            $ppm_path = preg_replace('/\.nef$/i', '.ppm', $full_path);
+
+            /* if PPM file does not exist, let dcraw convert it from NEF */
+            if(!file_exists($ppm_path)) {
+               system($this->cfg->dcraw_bin ." -a ". $full_path);
+            }
+
+            /* for now we handle the PPM instead of the NEF */
+            $full_path = $ppm_path;
 
-         /* if PPM file does not exist, let dcraw convert it from NEF */
-         if(!file_exists($ppm_path)) {
-            system($this->cfg->dcraw_bin ." -a ". $full_path);
          }
 
-         /* for now we handle the PPM instead of the NEF */
-         $full_path = $ppm_path;
+         $file_md5 = md5_file($full_path);
+         $changes = false;
 
-      }
+         foreach($resolutions as $resolution) {
 
-      $file_md5 = md5_file($full_path);
-      $changes = false;
+            $generate_it = false;
 
-      foreach($resolutions as $resolution) {
-   
-         $generate_it = false;
+            $thumb_sub_path = substr($file_md5, 0, 2);
+            $thumb_path = $this->cfg->thumb_path ."/". $thumb_sub_path ."/". $resolution ."_". $file_md5;
+
+            /* if thumbnail-subdirectory does not exist yet, create it */
+            if(!file_exists(dirname($thumb_path))) {
+               mkdir(dirname($thumb_path), 0755);
+            }
 
-         $thumb_sub_path = substr($file_md5, 0, 2);
-         $thumb_path = $this->cfg->thumb_path ."/". $thumb_sub_path ."/". $resolution ."_". $file_md5;
+            /* if the thumbnail file doesn't exist, create it */
+            if(!file_exists($thumb_path) || $force) {
+               $generate_it = true;
+            }
+            elseif($file_md5 != $this->getMD5($idx, $version)) {
+               $generate_it = true;
+            }
 
-         /* if thumbnail-subdirectory does not exist yet, create it */
-         if(!file_exists(dirname($thumb_path))) {
-            mkdir(dirname($thumb_path), 0755);
-         }
+            if($generate_it || $overwrite) {
 
-         /* if the thumbnail file doesn't exist, create it */
-         if(!file_exists($thumb_path)) {
-            $generate_it = true;
-         }
-         /* if the file hasn't changed there is no need to regen the thumb */
-         elseif($file_md5 != $this->getMD5($idx) || $force) {
-            $generate_it = true;
-         }
+               $this->_debug(" ". $resolution ."px");
+               if(!$this->create_thumbnail($full_path, $thumb_path, $resolution))
+                  $error = 1;
 
-         if($generate_it || $overwrite) {
+               $changes = true;
+            }
+         }
 
-            $this->_debug(" ". $resolution ."px");
-            if(!$this->create_thumbnail($full_path, $thumb_path, $resolution))
-               $error = 1;
+         if(!$changes) {
+            $this->_debug(" already exist");
+         }
 
-            $changes = true;
+         /* set the new/changed MD5 sum for the current photo */
+         if(!$error) {
+            $this->setMD5($idx, $file_md5, $version);
          }
-      }
 
-      if(!$changes) {
-         $this->_debug(" already exist");
-      }
+         $this->_debug("\n");
 
-      /* set the new/changed MD5 sum for the current photo */
-      if(!$error) {
-         $this->setMD5($idx, $file_md5);
       }
 
-      $this->_debug("\n");
-
    } // gen_thumb()
 
    /**
     * returns stored md5 sum for a specific photo
     *
-    * this function queries the phpfspot database for a
-    * stored MD5 checksum of the specified photo
+    * this function queries the phpfspot database for a stored MD5
+    * checksum of the specified photo. It also takes care of the
+    * requested photo version - original or alternative photo.
+    *
     * @param integer $idx
     * @return string|null
     */
-   public function getMD5($idx)
+   public function getMD5($idx, $version_idx = 0)
    {
       $result = $this->cfg_db->db_query("
-         SELECT img_md5 
-         FROM images
-         WHERE img_idx='". $idx ."'
+         SELECT
+            img_md5
+         FROM
+            images
+         WHERE
+            img_idx='". $idx ."'
+         AND
+            img_version_idx='". $version_idx ."'
       ");
 
       if(!$result)
-         return 0;
+         return NULL;
 
-      $img = $this->cfg_db->db_fetch_object($result);
-      return $img['img_md5'];
+      if($img = $this->cfg_db->db_fetch_object($result))
+         return $img['img_md5'];
+
+      return NULL;
       
    } // getMD5()
 
@@ -1772,11 +2170,16 @@ class PHPFSPOT {
     * @param integer $idx
     * @param string $md5
     */
-   private function setMD5($idx, $md5)
+   private function setMD5($idx, $md5, $version_idx = 0)
    {
       $result = $this->cfg_db->db_exec("
-         REPLACE INTO images (img_idx, img_md5)
-         VALUES ('". $idx ."', '". $md5 ."')
+         INSERT OR REPLACE INTO images (
+            img_idx, img_version_idx, img_md5
+         ) VALUES (
+            '". $idx ."',
+            '". $version_idx ."',
+            '". $md5 ."'
+         )
       ");
 
    } // setMD5()
@@ -1809,32 +2212,54 @@ class PHPFSPOT {
     */
    public function startSearch()
    {
-      if(isset($_POST['from']) && $this->isValidDate($_POST['from'])) {
-         $from = $_POST['from'];
+      /* date search */
+      if(isset($_POST['date_from']) && $this->isValidDate($_POST['date_from'])) {
+         $date_from = $_POST['date_from'];
       }
-      if(isset($_POST['to']) && $this->isValidDate($_POST['to'])) {
-         $to = $_POST['to'];
+      if(isset($_POST['date_to']) && $this->isValidDate($_POST['date_to'])) {
+         $date_to = $_POST['date_to'];
       }
 
+      /* tag-name search */
       if(isset($_POST['for_tag']) && is_string($_POST['for_tag'])) {
          $searchfor_tag = $_POST['for_tag'];
          $_SESSION['searchfor_tag'] = $_POST['for_tag'];
       }
+      else {
+         unset($_SESSION['searchfor_tag']);
+      }
 
+      /* file-name search */
       if(isset($_POST['for_name']) && is_string($_POST['for_name'])) {
-         $searchfor_name = $_POST['for_name'];
          $_SESSION['searchfor_name'] = $_POST['for_name'];
       }
+      else {
+         unset($_SESSION['searchfor_name']);
+      }
+
+      /* rate-search */
+      if(isset($_POST['rate_from']) && is_numeric($_POST['rate_from'])) {
+
+         $_SESSION['rate_from'] = $_POST['rate_from'];
+
+         if(isset($_POST['rate_to']) && is_numeric($_POST['rate_to'])) {
+            $_SESSION['rate_to'] = $_POST['rate_to'];
+         }
+      }
+      else {
+         /* delete any previously set value */
+         unset($_SESSION['rate_to'], $_SESSION['rate_from']);
+      }
 
       $this->get_tags();
 
-      if(isset($from) && !empty($from))
-         $_SESSION['from_date'] = strtotime($from ." 00:00:00");
+      if(isset($date_from) && !empty($date_from))
+         $_SESSION['from_date'] = strtotime($date_from ." 00:00:00");
       else
          unset($_SESSION['from_date']);
 
-      if(isset($to) && !empty($to))
-         $_SESSION['to_date'] = strtotime($to ." 23:59:59");
+      if(isset($date_to) && !empty($date_to))
+         $_SESSION['to_date'] = strtotime($date_to ." 23:59:59");
       else
          unset($_SESSION['to_date']);
 
@@ -1870,6 +2295,25 @@ class PHPFSPOT {
 
    } // updateSortOrder()
 
+   /**
+    * update photo version in session variable
+    *
+    * this function is invoked by RPC and will set the requested
+    * photo version in the session variable.
+    * @param string $photo_version
+    * @return string
+    */
+   public function update_photo_version($photo_idx, $photo_version)
+   {
+      if($this->is_valid_version($photo_idx, $photo_version)) {
+         $_SESSION['current_version'] = $photo_version;
+         return "ok";
+      }
+
+      return "incorrect photo version provided";
+
+   } // update_photo_version()
+
    /**
     * rotate image
     *
@@ -2092,7 +2536,7 @@ class PHPFSPOT {
 
    private function _debug($text)
    {
-      if($this->fromcmd) {
+      if(isset($this->fromcmd)) {
          print $text;
       }
 
@@ -2135,7 +2579,7 @@ class PHPFSPOT {
             error_log($text);
             break;
          case 'logfile':
-            error_log($text, 3, $his->cfg->log_file);
+            error_log($text, 3, $this->cfg->log_file);
             break;
       }
 
@@ -2144,32 +2588,31 @@ class PHPFSPOT {
    } // _error()
 
    /**
-    * output calendard input fields
+    * get calendar input-text fields
+    *
+    * this function returns a text-field used for the data selection.
+    * Either it will be filled with the current date or, if available,
+    * filled with the date user entered previously.
+    *
     * @param string $mode
     * @return string
     */
-   private function get_calendar($mode)
+   private function get_date_text_field($mode)
    {
-      $year = isset($_SESSION[$mode .'_date']) ? date("Y", $_SESSION[$mode .'_date']) : date("Y");
-      $month = isset($_SESSION[$mode .'_date']) ? date("m", $_SESSION[$mode .'_date']) : date("m");
-      $day = isset($_SESSION[$mode .'_date']) ? date("d", $_SESSION[$mode .'_date']) : date("d");
+      $date = isset($_SESSION[$mode .'_date']) ? date("Y", $_SESSION[$mode .'_date']) : date("Y");
+      $date.= "-";
+      $date.= isset($_SESSION[$mode .'_date']) ? date("m", $_SESSION[$mode .'_date']) : date("m");
+      $date.= "-";
+      $date.= isset($_SESSION[$mode .'_date']) ? date("d", $_SESSION[$mode .'_date']) : date("d");
 
-      $output = "<input type=\"text\" size=\"3\" id=\"". $mode ."year\" value=\"". $year ."\"";
-      if(!isset($_SESSION[$mode .'_date']))
-         $output.= " disabled=\"disabled\"";
-      $output.= " />\n";
-      $output.= "<input type=\"text\" size=\"1\" id=\"". $mode ."month\" value=\"". $month ."\"";
-      if(!isset($_SESSION[$mode .'_date']))
-         $output.= " disabled=\"disabled\"";
-      $output.= " />\n";
-      $output.= "<input type=\"text\" size=\"1\" id=\"". $mode ."day\" value=\"". $day ."\"";
+      $output = "<input type=\"text\" size=\"15\" id=\"date_". $mode ."\" value=\"". $date ."\"";
       if(!isset($_SESSION[$mode .'_date']))
          $output.= " disabled=\"disabled\"";
       $output.= " />\n";
 
       return $output;
 
-   } // get_calendar()
+   } // get_date_text_field()
 
    /**
     * output calendar matrix
@@ -2263,7 +2706,7 @@ class PHPFSPOT {
 
       foreach($pictures as $picture) {
 
-         $orig_url = $this->get_phpfspot_url() ."index.php?mode=showp&id=". $picture;
+         $orig_url = $this->get_phpfspot_url() ."/index.php?mode=showp&id=". $picture;
          if($current_tags != "") {
             $orig_url.= "&tags=". $current_tags;
          } 
@@ -2271,7 +2714,12 @@ class PHPFSPOT {
             $orig_url.= "&from_date=". $_SESSION['from_date'] ."&to_date=". $_SESSION['to_date'];
          }
 
-         $thumb_url = $this->get_phpfspot_url() ."phpfspot_img.php?idx=". $picture ."&width=". $this->cfg->thumb_width;
+         if($this->is_user_friendly_url()) {
+            $thumb_url = $this->get_phpfspot_url() ."/photo/". $picture ."/". $this->cfg->thumb_width;
+         }
+         else {
+            $thumb_url = $this->get_phpfspot_url() ."/phpfspot_img.php?idx=". $picture ."&width=". $this->cfg->thumb_width;
+         }
 
          switch($mode) {
 
@@ -2320,7 +2768,7 @@ class PHPFSPOT {
 
       foreach($pictures as $picture) {
 
-         $orig_url = $this->get_phpfspot_url() ."index.php?mode=showp&id=". $picture;
+         $orig_url = $this->get_phpfspot_url() ."/index.php?mode=showp&id=". $picture;
          if($current_tags != "") {
             $orig_url.= "&tags=". $current_tags;
          } 
@@ -2330,7 +2778,13 @@ class PHPFSPOT {
 
          $details = $this->get_photo_details($picture);
 
-         $thumb_url = $this->get_phpfspot_url() ."phpfspot_img.php?idx=". $picture ."&width=". $this->cfg->thumb_width;
+         if($this->is_user_friendly_url()) {
+            $thumb_url = $this->get_phpfspot_url() ."/photo/". $picture ."/". $this->cfg->thumb_width;
+         }
+         else {
+            $thumb_url = $this->get_phpfspot_url() ."/phpfspot_img.php?idx=". $picture ."&width=". $this->cfg->thumb_width;
+         }
+
          $thumb_html = htmlspecialchars("
 <a href=\"". $orig_url ."\"><img src=\"". $thumb_url ."\" /></a>
 <br>
@@ -2339,22 +2793,20 @@ class PHPFSPOT {
          $orig_path = $this->translate_path($this->parse_uri($details['uri'], 'fullpath'));
 
          /* get EXIF information if JPEG */
-         if($details['mime'] == "image/jpeg") {
+         if(isset($details['mime']) && $details['mime'] == "image/jpeg") {
             $meta = $this->get_meta_informations($orig_path);
          }
 
-         $meta_date = isset($meta['FileDateTime']) ? $meta['FileDateTime'] : filemtime($orig_path);
-
 ?>
   <item>
    <title><?php print htmlspecialchars($this->parse_uri($details['uri'], 'filename')); ?></title>
    <link><?php print htmlspecialchars($orig_url); ?></link>
    <guid><?php print htmlspecialchars($orig_url); ?></guid>
-   <dc:date.Taken><?php print strftime("%Y-%m-%dT%H:%M:%S+00:00", $meta_date); ?></dc:date.Taken>
+   <dc:date.Taken><?php print strftime("%Y-%m-%dT%H:%M:%S+00:00", $details['time']); ?></dc:date.Taken>
    <description>
     <?php print $thumb_html; ?> 
    </description>
-   <pubDate><?php print strftime("%a, %d %b %Y %T %z", $meta_date); ?></pubDate>
+   <pubDate><?php print strftime("%a, %d %b %Y %T %z", $details['time']); ?></pubDate>
   </item>
 <?php
 
@@ -2369,7 +2821,10 @@ class PHPFSPOT {
 
  
    /**
-    * return all selected tags as one string
+    * get all selected tags
+    *
+    * This function will return all selected tags as one string, seperated
+    * by a comma.
     * @return array
     */
    private function getCurrentTags()
@@ -2387,12 +2842,52 @@ class PHPFSPOT {
    /**
     * return the current photo
     */
-   public function getCurrentPhoto()
+   public function get_current_photo()
    {
       if(isset($_SESSION['current_photo'])) {
-         print $_SESSION['current_photo'];
+         return $_SESSION['current_photo'];
       }
-   } // getCurrentPhoto()
+
+      return NULL;
+
+   } // get_current_photo()
+
+   /**
+    * current selected photo version
+    *
+    * this function returns the current selected photo version
+    * from the session variables.
+    *
+    * @return int
+    */
+   public function get_current_version()
+   {
+      /* if current version is set, return it, if the photo really has that version */
+      if(isset($_SESSION['current_version']) && is_numeric($_SESSION['current_version']))
+         return $_SESSION['current_version'];
+
+      return false;
+
+   } // get_current_version()
+
+   /**
+    * returns latest available photo version
+    *
+    * this function returns the latested available version
+    * for the requested photo.
+    *
+    * @return int
+    */
+   public function get_latest_version($photo_idx)
+   {
+      /* try to get the lasted version for the current photo */
+      if($versions = $this->get_photo_versions($photo_idx))
+         return $versions[count($versions)-1];
+
+      /* if no alternative version were found, return original version */
+      return 0;
+
+   } // get_current_version()
 
    /**
     * tells the client browser what to do
@@ -2407,7 +2902,6 @@ class PHPFSPOT {
    public function whatToDo()
    {
       if(isset($_SESSION['current_photo']) && $_SESSION['start_action'] == 'showp') {
-         return "show_photo";
       }
       elseif(isset($_SESSION['selected_tags']) && !empty($_SESSION['selected_tags'])) {
          return "showpi_tags";
@@ -2416,8 +2910,6 @@ class PHPFSPOT {
          return "showpi";
       }
 
-      return "nothing special";
-
    } // whatToDo()
 
    /**
@@ -2436,6 +2928,37 @@ class PHPFSPOT {
    
    } // getuid()
 
+   /**
+    * photo version select list
+    *
+    * this function returns a HTML select list (drop down)
+    * to select a alternative photo version of the original photo.
+    *
+    * @param array $params
+    * @param smarty $smarty
+    * @return string
+    */
+   public function smarty_photo_version_select_list($params, &$smarty)
+   {
+      if(!isset($params['photo']) || !isset($params['current']))
+         return NULL;
+
+      $output = "<option value=\"0\">Original</option>";
+      $versions = $this->get_photo_versions($params['photo']);
+
+      foreach($versions as $version) {
+
+         $output.= "<option value=\"". $version ."\"";
+         if($version == $params['current']) {
+            $output.= " selected=\"selected\"";
+         }
+         $output.= ">". $this->get_photo_version_name($params['photo'], $version) ."</option>";
+      }
+
+      return $output;
+
+   } // smarty_photo_version_select_list()
+
    /**
     * returns a select-dropdown box to select photo index sort parameters
     * @param array $params
@@ -2493,6 +3016,12 @@ class PHPFSPOT {
          case 'tags_desc':
             return " ORDER BY t.name DESC ,p.time ASC";
             break;
+         case 'rate_asc':
+            return " ORDER BY p.rating ASC, t.name ASC";
+            break;
+         case 'rate_desc':
+            return " ORDER BY p.rating DESC, t.name ASC";
+            break;
       }
 
    } // get_sort_order()
@@ -2513,7 +3042,11 @@ class PHPFSPOT {
       else
          $_SESSION['slideshow_img']++;
 
-      return $this->get_phpfspot_url() ."phpfspot_img.php?idx=". $all_photos[$_SESSION['slideshow_img']] ."&width=". $this->cfg->photo_width;
+      if($this->is_user_friendly_url()) {
+         return $this->get_phpfspot_url() ."/photo/". $all_photos[$_SESSION['slideshow_img']] ."/". $this->cfg->photo_width;
+      }
+
+      return $this->get_phpfspot_url() ."/phpfspot_img.php?idx=". $all_photos[$_SESSION['slideshow_img']] ."&width=". $this->cfg->photo_width;
 
    } // getNextSlideShowImage()
 
@@ -2533,7 +3066,11 @@ class PHPFSPOT {
       else
          $_SESSION['slideshow_img']--;
 
-      return $this->get_phpfspot_url() ."phpfspot_img.php?idx=". $all_photos[$_SESSION['slideshow_img']] ."&width=". $this->cfg->photo_width;
+      if($this->is_user_friendly_url()) {
+         return $this->get_phpfspot_url() ."/photo/". $all_photos[$_SESSION['slideshow_img']] ."/". $this->cfg->photo_width;
+      }
+
+      return $this->get_phpfspot_url() ."/phpfspot_img.php?idx=". $all_photos[$_SESSION['slideshow_img']] ."&width=". $this->cfg->photo_width;
 
    } // getPrevSlideShowImage()
 
@@ -2602,29 +3139,35 @@ class PHPFSPOT {
    {
       $all = Array();
 
-      $query_str = "
-         SELECT p.id
-         FROM photos p
-         INNER JOIN photo_tags pt
-            ON p.id=pt.photo_id
-      ";
-
       if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
          $query_str.= "
-            INNER JOIN tags t
-               ON pt.tag_id=t.id
-         ";
+            SELECT
+               DISTINCT pt1.photo_id as id
+            FROM
+               photo_tags pt1
+            INNER JOIN photo_tags
+               pt2 ON pt1.photo_id=pt2.photo_id
+            INNER JOIN tags t1
+               ON t1.id=pt1.tag_id
+            INNER JOIN tags t2
+               ON t2.id=pt2.tag_id
+            WHERE
+               pt1.tag_id LIKE '". $tagidx ."'
+            AND
+               t2.name IN  ('".implode("','",$this->cfg->show_tags)."')
+            ORDER BY
+               t1.sort_priority ASC";
       }
-      $query_str.= "
-         WHERE
-            pt.tag_id LIKE '". $tagidx ."'
-      ";
-
-      if(isset($this->cfg->show_tags) && !empty($this->cfg->show_tags)) {
-         $query_str.= "
-           AND
-               t.name IN ('".implode("','",$this->cfg->show_tags)."')
-         ";
+      else {
+         $query_str = "
+            SELECT
+               p.id
+            FROM
+               photos p
+            INNER JOIN photo_tags pt
+               ON p.id=pt.photo_id
+            WHERE
+               pt.tag_id LIKE '". $tagidx ."'";
       }
 
       $result = $this->db->db_query($query_str);
@@ -2664,7 +3207,9 @@ class PHPFSPOT {
     */
    private function ts2str($timestamp)
    {
-      return strftime("%Y-%m-%d", $timestamp);
+      if(!empty($timestamp) && is_numeric($timestamp))
+         return strftime("%Y-%m-%d", $timestamp);
+
    } // ts2str()
 
    /**
@@ -2692,9 +3237,9 @@ class PHPFSPOT {
     * @param integer $photo
     * @return string
     */
-   public function get_thumb_path($width, $photo)
+   public function get_thumb_path($width, $photo_idx, $version_idx)
    {
-      $md5 = $this->getMD5($photo);
+      $md5 = $this->getMD5($photo_idx, $version_idx);
       $sub_path = substr($md5, 0, 2);
       return $this->cfg->thumb_path
          . "/"
@@ -2734,6 +3279,7 @@ class PHPFSPOT {
    private function get_phpfspot_url()
    {
       return $this->get_web_protocol() ."://". $this->get_server_name() . $this->cfg->web_path;
+
    } // get_phpfspot_url()
 
    /**
@@ -2926,9 +3472,11 @@ class PHPFSPOT {
 
       }
 
-      /* check for pending slash on web_path */
-      if(!preg_match("/\/$/", $this->cfg->web_path))
-         $this->cfg->web_path.= "/";
+      /* remove trailing slash, if set */
+      if($this->cfg->web_path == "/")
+         $this->cfg->web_path = "";
+      elseif(preg_match('/\/$/', $this->cfg->web_path))
+         $this->cfg->web_path = preg_replace('/\/$/', '', $this->cfg->web_path);
 
       return $this->runtime_error;
 
@@ -3004,7 +3552,7 @@ class PHPFSPOT {
     */
    public function get_mime_info($file)
    {
-      $details = getimagesize($orig_image);
+      $details = getimagesize($file);
 
       /* if getimagesize() returns empty, try at least to find out the
          mime type.
@@ -3045,6 +3593,215 @@ class PHPFSPOT {
       
    } // get_tag_name()
 
+   /**
+    * parse user friendly url which got rewritten by the websever
+    * @param string $request_uri
+    * @return string
+    */
+   private function parse_user_friendly_url($request_uri)
+   {
+      if(preg_match('/\/photoview\/|\/photo\/|\/tag\//', $request_uri)) {
+
+         $options = explode('/', $request_uri);
+
+         switch($options[1]) {
+            case 'photoview':
+               if(is_numeric($options[2])) {
+                  $this->session_cleanup();
+                  //unset($_SESSION['start_action']);
+                  //unset($_SESSION['selected_tags']);
+                  $_GET['mode'] = 'showp';
+                  return $this->showPhoto($options[2]);
+               }
+               break;
+            case 'photo':
+               if(is_numeric($options[2])) {
+                  $width = NULL;
+                  $version = NULL;
+                  if(isset($options[3]) && is_numeric($options[3]))
+                     $width = $options[3];
+                  if(isset($options[4]) && is_numeric($options[4]))
+                     $version = $options[4];
+                  require_once "phpfspot_img.php";
+                  $img = new PHPFSPOT_IMG;
+                  $img->showImg($options[2], $width, $version);
+               }
+               exit;
+               break;
+            case 'tag':
+               if(is_numeric($options[2])) {
+                  $this->session_cleanup();
+                  $_GET['tags'] = $options[2];
+                  $_SESSION['selected_tags'] = Array($options[2]);
+                  if(isset($options[3]) && is_numeric($options[3]))
+                     $_SESSION['begin_with'] = $options[3];
+                  return $this->showPhotoIndex();
+               }
+               break;
+         }
+      }
+
+   } // parse_user_friendly_url()
+
+   /**
+    * check if user-friendly-urls are enabled
+    *
+    * this function will return true, if the config option
+    * $user_friendly_url has been set. Otherwise false.
+    * @return boolean
+    */
+   private function is_user_friendly_url()
+   {
+      if(isset($this->cfg->user_friendly_url) && $this->cfg->user_friendly_url)
+         return true;
+
+      return false;
+
+   } // is_user_friendly_url()
+
+   /**
+    * session cleanup
+    *
+    * this function will cleanup user's session information
+    */
+   private function session_cleanup()
+   {
+      unset($_SESSION['begin_with']);
+      $this->resetDateSearch();
+      $this->resetPhotoView();
+      $this->resetTagSearch();
+      $this->resetNameSearch();
+      $this->resetDateSearch();
+      $this->resetTags();
+
+   } // session_cleanup()
+
+   /**
+    * get database version
+    *
+    * this function queries the meta table
+    * and returns the current database version.
+    *
+    * @return integer
+    */
+   public function get_db_version()
+   {
+      if($row = $this->cfg_db->db_fetchSingleRow("
+         SELECT meta_value
+         FROM
+            meta
+         WHERE
+            meta_key LIKE 'phpfspot Database Version'
+         ")) {
+
+         return $row['meta_value'];
+
+      }
+
+      return 0;
+
+   } // get_db_version()
+
+   /**
+    * get photo versions
+    *
+    * this function returns an array of all available
+    * alterntaive versions of the provided photo id.
+    * has alternative photo versions available
+    *
+    * @param int $idx
+    * @return array
+    */
+   public function get_photo_versions($idx)
+   {
+      $versions = Array();
+
+      $result = $this->db->db_query("
+         SELECT
+            version_id
+         FROM
+            photo_versions
+         WHERE
+            photo_id LIKE '". $idx ."'");
+
+      while($row = $this->cfg_db->db_fetch_object($result)) {
+         array_push($versions, $row['version_id']);
+      }
+
+      return $versions;
+
+   } // get_photo_versions()
+
+   /**
+    * check for invalid version of photo
+    *
+    * this function validates the provided photo-id and version-id
+    *
+    * @param int $photo_idx
+    * @param int $version_idx
+    * @return bool
+    */
+   public function is_valid_version($photo_idx, $version_idx)
+   {
+      /* the original version is always valid */
+      if($version_idx == 0)
+         return true;
+
+      if($versions = $this->get_photo_versions($photo_idx)) {
+         if(in_array($version_idx, $versions))
+            return true;
+      }
+
+      return false;
+
+   } // is_valid_version()
+
+   /**
+    * get photo version name
+    *
+    * this function returns the name of the version
+    * identified by the photo-id and version-id.
+    *
+    * @param int $photo_idx
+    * @param int $version_idx
+    * @return string
+    */
+   public function get_photo_version_name($photo_idx, $version_idx)
+   {
+      if($row = $this->db->db_fetchSingleRow("
+         SELECT
+            name
+         FROM
+            photo_versions
+         WHERE
+            photo_id LIKE '". $photo_idx ."'
+         AND
+            version_id LIKE '". $version_idx ."'")) {
+
+         return $row['name'];
+
+      }
+
+      return false;
+
+   } // get_photo_version_name()
+
+   /**
+    */
+   public function is_valid_width($image_width)
+   {
+      if(in_array($image_width,
+         Array($this->cfg->thumb_width,
+               $this->cfg->photo_width,
+               $this->cfg->mini_width,
+               30)))
+
+         return true;
+
+      return false;
+
+   } // is_valid_width()
+
 } // class PHPFSPOT
 
 ?>