1 files changed, 11 insertions, 3 deletions
diff --git a/lib/study/deckadd.php b/lib/study/deckadd.php
index d7f8e9f..b95648c 100644
--- a/lib/study/deckadd.php
+++ b/lib/study/deckadd.php
@@ -1,5 +1,13 @@
 <?php
 
-$title = "olol";
-$message = 'Placeholder. Go to <a href="deck">study decks</a>.';
-require("tpl/general/empty.php");
+assert_redir(count($args) == 3, 'deck');
+$deckid = intval($args[2]);
+$deck = mysql_fetch_assoc(sql("SELECT id FROM decks WHERE id = $deckid"));
+assert_error($deck, "This deck does not exist.");
+
+assert_error(!mysql_fetch_assoc(sql("SELECT id FROM deck_study WHERE deck = $deckid AND user = " . $user['id'])),
+	"You are already studying this deck.");
+
+sql("INSERT INTO deck_study(user, deck) VALUES(" . $user['id'] . ", $deckid)");
+header("Location: deck-study-".mysql_insert_id());
+die();