Check configured privs on server start

initialize.lua

@@ -1,6 +1,7 @@
 local function run_each_serverstart()
     yl_scheduler.tasks = {}
     minetest.after(0.0, yl_scheduler.load_all_tasks)
+    minetest.after(0.0, yl_scheduler.check_privs)
 end
 
 run_each_serverstart()

internal.lua

@@ -31,6 +31,14 @@ local function sort_by_timestamp(tasks)
     return tasks
 end
 
+local function split(str)
+    local parts = {}
+    for part in str:gmatch("[^,%s]+") do table.insert(parts, part) end
+    return parts
+end
+
+local function ends_with(str, suffix) return str:sub(-suffix:len()) == suffix end
+
 -- Loading and Saving
 
 local function get_savepath()
@@ -124,3 +132,51 @@ local function load_all_tasks()
 end
 
 function yl_scheduler.load_all_tasks() return load_all_tasks() end
+
+-- ### priv exists ###
+
+local function priv_exists(priv)
+    return (minetest.registered_privileges[priv] ~= nil) or false
+end
+
+function yl_scheduler.priv_exists(priv) return priv_exists(priv) end
+
+-- ### get_privs ###
+-- {[yl_scheduler.settings.admin_priv] = true}
+
+local cmds = {}
+
+cmds["scheduler_add"] = "taskadd_privs"
+cmds["scheduler_remove"] = "taskremove_privs"
+cmds["scheduler_list"] = "tasklist_privs"
+cmds["scheduler_clean"] = "taskclean_privs"
+
+local function get_privs(chatcommand_cmd) -- scheduler_add -- taskadd_privs
+    local privs = split(yl_scheduler.settings[cmds[chatcommand_cmd]])
+    local ret = {}
+    for _,priv in ipairs(privs) do
+        ret[priv] = true
+    end
+    return ret
+end
+
+function yl_scheduler.get_privs(chatcommand_cmd)
+    return get_privs(chatcommand_cmd)
+end
+
+-- ### check privs ###
+
+function check_privs()
+    for key, value in pairs(yl_scheduler.settings) do
+        if ends_with(key, "_privs") then
+            local parts = split(value)
+            for _, part in ipairs(parts) do
+                assert(priv_exists(part), "yl_scheduler : configured priv " ..
+                        dump(part) .. " doesn not exist.")
+            end
+        end
+    end
+    say("PASS priv check")
+end
+
+function yl_scheduler.check_privs() return check_privs() end