order[=|:]random_#### metatag

possible replacement for random_list ext?

core/imageboard.pack.php

@@ -129,7 +129,7 @@ class Image {
 		}
 
 		$querylet = Image::build_search_querylet($tags);
-		$querylet->append(new Querylet(" ORDER BY images.".($order_sql ?: $config->get_string("index_order"))));
+		$querylet->append(new Querylet(" ORDER BY ".($order_sql ?: "images.".$config->get_string("index_order"))));
 		$querylet->append(new Querylet(" LIMIT :limit OFFSET :offset", array("limit"=>$limit, "offset"=>$start)));
 		#var_dump($querylet->sql); var_dump($querylet->variables);
 		$result = $database->execute($querylet->sql, $querylet->variables);

ext/index/main.php

@@ -94,6 +94,10 @@
  *        <li>order=width -- find all images sorted from highest > lowest width
  *        <li>order=filesize_asc -- find all images sorted from lowest > highest filesize
  *      </ul>
+ *    <li>order=random_####, eg
+ *      <ul>
+ *        <li>order=random_8547 -- find all images sorted randomly using 8547 as a seed
+ *      </ul>
  *  </ul>
  *  <p>Search items can be combined to search for images which match both,
  *  or you can stick "-" in front of an item to search for things that don't
@@ -362,7 +366,15 @@ class Index extends Extension {
 			$ord = strtolower($matches[1]);
 			$default_order_for_column = preg_match("/^(id|filename)$/", $matches[1]) ? "ASC" : "DESC";
 			$sort = isset($matches[2]) ? strtoupper($matches[2]) : $default_order_for_column;
-			$order_sql = "$ord $sort";
+			$order_sql = "images.$ord $sort";
+			$event->add_querylet(new Querylet("1=1")); //small hack to avoid metatag being treated as normal tag
+		}
+		else if(preg_match("/^order[=|:]random[_]([0-9]{1,4})$/i", $event->term, $matches)){
+			global $order_sql;
+			//order[=|:]random requires a seed to avoid duplicates
+			//since the tag can't be changed during the parseevent, we instead generate the seed during submit using js
+			$seed = $matches[1];
+			$order_sql = "RAND($seed)";
 			$event->add_querylet(new Querylet("1=1")); //small hack to avoid metatag being treated as normal tag
 		}
 

ext/index/script.js

@@ -17,6 +17,18 @@ $(function() {
 			function() {$('.shm-image-list').show();}
 		);
 	}
+
+	//Generate a random seed when using order:random
+	$('form[action="/shimmie/post/list"]').submit(function(e){
+		var input = $('form[action="/shimmie/post/list"] input[name=search]');
+		var tagArr = input.val().split(" ");
+
+		var rand = (($.inArray("order:random", tagArr) + 1) || ($.inArray("order=random", tagArr) + 1)) - 1;
+		if(rand !== -1){
+			tagArr[rand] = "order:random_"+Math.floor((Math.random()*9999)+1);
+			input.val(tagArr.join(" "));
+		}
+	});
 });
 
 function select_blocked_tags() {

ext/numeric_score/main.php

@@ -237,7 +237,7 @@ class NumericScore extends Extension {
 			global $order_sql;
 			$default_order_for_column = "DESC";
 			$sort = isset($matches[3]) ? strtoupper($matches[3]) : $default_order_for_column;
-			$order_sql = "numeric_score $sort";
+			$order_sql = "images.numeric_score $sort";
 			$event->add_querylet(new Querylet("1=1")); //small hack to avoid metatag being treated as normal tag
 		}
 	}