Adds priv existence check

internal.lua

@@ -103,6 +103,36 @@ end
 
 function yl_announcements.load_all_data() return load_all_data() end
 
+-- check privs
+--
+
+local function ends_with(str, suffix) return str:sub(-suffix:len()) == suffix end
+
+local function split(str)
+    local parts = {}
+    for part in str:gmatch("[^,%s]+") do table.insert(parts, part) end
+    return parts
+end
+
+local function priv_exists(priv)
+    return (minetest.registered_privileges[priv] ~= nil) or false
+end
+
+function check_privs()
+    for key, value in pairs(yl_announcements.settings) do
+        if ends_with(key, "_privs") then
+            local parts = split(value)
+            for _, part in ipairs(parts) do
+                assert(priv_exists(part), "yl_announcements : configured priv " ..
+                           dump(part) .. " does not exist.")
+            end
+        end
+    end
+    say("PASS priv check")
+end
+
+function yl_announcements.check_privs() return check_privs() end
+
 -- Chatcommands
 --