From 5e6675f3184f37caeee1a71a75b0cb88f711dc1f Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Sun, 24 Jul 2016 14:59:09 +0200
Subject: New function: doc.entry_exists

---
 init.lua | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'init.lua')

diff --git a/init.lua b/init.lua
index 8f879d2..e05fdf3 100644
--- a/init.lua
+++ b/init.lua
@@ -60,6 +60,17 @@ function doc.show_entry(playername, category_id, entry_id)
 	minetest.show_formspec(playername, "doc:entry", formspec)
 end
 
+-- Returns true if and only if:
+-- * The specified category exists
+-- * This category contains the specified entry
+function doc.entry_exists(category_id, entry_id)
+	if doc.data.categories[category_id] ~= nil then
+		return doc.data.categories[category_id].entries[entry_id] ~= nil
+	else
+		return false
+	end
+end
+
 --[[ Functions for internal use ]]
 
 function doc.formspec_core(tab)
-- 
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