1 files changed, 13 insertions, 0 deletions
diff --git a/lib/study/listadd.php b/lib/study/listadd.php
new file mode 100644
index 0000000..536ab1d
--- /dev/null
+++ b/lib/study/listadd.php
@@ -0,0 +1,13 @@
+<?php
+
+assert_redir(count($args) == 3, 'list');
+$listid = intval($args[2]);
+$list = mysql_fetch_assoc(sql("SELECT id FROM lists WHERE id = $listid"));
+assert_error($list, "This list does not exist.");
+
+assert_error(!mysql_fetch_assoc(sql("SELECT id FROM list_study WHERE list = $listid AND user = " . $user['id'])),
+	"You are already studying this list.");
+
+sql("INSERT INTO list_study(user, list) VALUES(" . $user['id'] . ", $listid)");
+header("Location: list-study-".mysql_insert_id());
+die();