Improved /effect command and fixes

-improved the /effect command, allowing to use effect levels
-fixed a bug in level-to-factor conversions
-renamed effect icons to follow the new convention

mods/ITEMS/mcl_potions/commands.lua

@@ -8,23 +8,9 @@ local S = minetest.get_translator(minetest.get_current_modname())
 -- ░╚════╝░╚═╝░░╚═╝╚═╝░░╚═╝░░░╚═╝░░░  ░╚════╝░░╚════╝░╚═╝░░░░░╚═╝╚═╝░░░░░╚═╝╚═╝░░╚═╝╚═╝░░╚══╝╚═════╝░╚═════╝░
 
 
-local get_chat_function = {}
-
-get_chat_function["poison"] = mcl_potions.poison_func
-get_chat_function["regeneration"] = mcl_potions.regeneration_func
-get_chat_function["invisibility"] = mcl_potions.invisiblility_func
-get_chat_function["fire_resistance"] = mcl_potions.fire_resistance_func
-get_chat_function["night_vision"] = mcl_potions.night_vision_func
-get_chat_function["water_breathing"] = mcl_potions.water_breathing_func
-get_chat_function["leaping"] = mcl_potions.leaping_func
-get_chat_function["swiftness"] = mcl_potions.swiftness_func
-get_chat_function["heal"] = mcl_potions.healing_func
-get_chat_function["bad_omen"] = mcl_potions.bad_omen_func
-get_chat_function["withering"] = mcl_potions.withering_func
-
 minetest.register_chatcommand("effect",{
-	params = S("<effect> <duration> [<factor>]"),
-	description = S("Add a status effect to yourself. Arguments: <effect>: name of status effect, e.g. poison. <duration>: duration in seconds. <factor>: effect strength multiplier (1 = 100%)"),
+	params = S("<effect> <duration> [<level>] [<factor>]"),
+	description = S("Add a status effect to yourself. Arguments: <effect>: name of status effect, e.g. poison. <duration>: duration in seconds. <level>: effect power determinant, bigger level results in more powerful effect for effects that depend on the level, defaults to 1, pass F to use low-level factor instead. <factor>: effect strength modifier, can mean different things depending on the effect."),
 	privs = {server = true},
 	func = function(name, params)
 
@@ -37,22 +23,46 @@ minetest.register_chatcommand("effect",{
 
 		if not P[1] then
 			return false, S("Missing effect parameter!")
+		elseif P[1] == "list" then
+			local regs = mcl_potions.get_registered_effects()
+			local effects = "heal"
+			for name, _ in pairs(regs) do
+				effects = effects .. ", " .. name
+			end
+			return true, effects
 		elseif not tonumber(P[2])then
 			return false, S("Missing or invalid duration parameter!")
-		elseif P[3] and not tonumber(P[3]) then
-			return false, S("Invalid factor parameter!")
-		end
-		-- Default factor = 1
-		if not P[3] then
-			P[3] = 1.0
+		elseif P[3] and not tonumber(P[3]) and P[3] ~= "F" then
+			return false, S("Invalid level parameter!")
+		elseif P[3] and P[3] == "F" and not P[4] then
+			return false, S("Missing or invalid factor parameter when level is F!")
 		end
 
-		if get_chat_function[P[1]] then
-			get_chat_function[P[1]](minetest.get_player_by_name(name), tonumber(P[3]), tonumber(P[2]))
-			return true
+		-- Default level = 1
+		if not P[3] then
+			P[3] = 1
+		end
+
+		if mcl_potions.is_effect_registered(P[1]) then
+			if P[3] == "F" then
+				local given = mcl_potions.give_effect(P[1], minetest.get_player_by_name(name), tonumber(P[4]), tonumber(P[2]))
+				if given then
+					return true, S("@1 effect given to player @2 for @3 seconds with factor of @4.", P[1], name, P[2], P[4])
+				else
+					return false, S("Giving effect @1 to player @2 failed.", P[1], name)
+				end
+			else
+				local given = mcl_potions.give_effect_by_level(P[1], minetest.get_player_by_name(name), tonumber(P[3]), tonumber(P[2]))
+				if given then
+					return true, S("@1 effect on level @2 given to player @3 for @4 seconds.", P[1], P[3], name, P[2])
+				else
+					return false, S("Giving effect @1 to player @2 failed.", P[1], name)
+				end
+			end
 		else
 			return false, S("@1 is not an available status effect.", P[1])
 		end
 
 	 end,
 })
+

mods/ITEMS/mcl_potions/functions.lua

@@ -48,7 +48,7 @@ local function generate_linear_lvl_to_fac(l1, l2)
 end
 
 local function generate_rational_lvl_to_fac(l1, l2)
-	local a = (l1 - l2) / 1.5
+	local a = (l1 - l2) * 2
 	local b = 2*l2 - l1
 	return function(level)
 		if level == 0 then return 0 end
@@ -89,6 +89,15 @@ function mcl_potions.register_effect(def)
 	if def.name == nil then
 		error("Unable to register effect: name is nil")
 	end
+	if def.name == "list" then
+		error("Unable to register effect: list is a reserved word")
+	end
+	if def.name == "heal" then
+		error("Unable to register effect: heal is a reserved word")
+	end
+	if registered_effects[name] then
+		error("Effect named "..name.." already registered!")
+	end
 	local name = def.name
 	local pdef = {}
 	if not def.icon then
@@ -141,6 +150,18 @@ function mcl_potions.register_effect(def)
 	EF[name] = {}
 end
 
+function mcl_potions.get_registered_effects()
+	return table.copy(registered_effects)
+end
+
+function mcl_potions.is_effect_registered(name)
+	if registered_effects[name] then
+		return true
+	else
+		return false
+	end
+end
+
 mcl_potions.register_effect({
 	name = "invisibility",
 	on_start = function(object, factor)
@@ -891,7 +912,7 @@ function mcl_potions._load_player_effects(player)
 
 	-- new API effects + on_load for loaded legacy effects
 	for name, effect in pairs(registered_effects) do
-		local loaded = minetest.deserialize(meta:get_string("mcl_potions:"..name))
+		local loaded = minetest.deserialize(meta:get_string("mcl_potions:_EF_"..name))
 		if loaded then EF[name][player] = loaded end
 		if EF[name][player] and effect.on_load then
 			effect.on_load(player, EF[name][player].factor)
@@ -1133,10 +1154,8 @@ local function target_valid(object, name)
 end
 
 function mcl_potions.give_effect(name, object, factor, duration)
-	if not target_valid(object, name) then return false end
-
 	local edef = registered_effects[name]
-	if not edef then return false end
+	if not edef or not target_valid(object, name) then return false end
 	if not EF[name][object] then
 		local vals = {dur = duration, timer = 0,}
 		if edef.uses_factor then vals.factor = factor end
@@ -1160,6 +1179,8 @@ function mcl_potions.give_effect(name, object, factor, duration)
 	end
 
 	if object:is_player() then potions_set_hud(object) end
+
+	return true
 end
 
 function mcl_potions.give_effect_by_level(name, object, level, duration)

mods/ITEMS/mcl_potions/init.lua

@@ -462,17 +462,18 @@ function mcl_potions.get_alchemy(ingr, pot)
 	return false
 end
 
-mcl_mobs.effect_functions["poison"] = mcl_potions.poison_func
-mcl_mobs.effect_functions["regeneration"] = mcl_potions.regeneration_func
-mcl_mobs.effect_functions["invisibility"] = mcl_potions.invisiblility_func
-mcl_mobs.effect_functions["fire_resistance"] = mcl_potions.fire_resistance_func
-mcl_mobs.effect_functions["night_vision"] = mcl_potions.night_vision_func
-mcl_mobs.effect_functions["water_breathing"] = mcl_potions.water_breathing_func
-mcl_mobs.effect_functions["leaping"] = mcl_potions.leaping_func
-mcl_mobs.effect_functions["swiftness"] = mcl_potions.swiftness_func
-mcl_mobs.effect_functions["heal"] = mcl_potions.healing_func
-mcl_mobs.effect_functions["bad_omen"] = mcl_potions.bad_omen_func
-mcl_mobs.effect_functions["withering"] = mcl_potions.withering_func
+-- TODO replace all calls to the old API with new API calls in other mods
+-- mcl_mobs.effect_functions["poison"] = mcl_potions.poison_func
+-- mcl_mobs.effect_functions["regeneration"] = mcl_potions.regeneration_func
+-- mcl_mobs.effect_functions["invisibility"] = mcl_potions.invisiblility_func
+-- mcl_mobs.effect_functions["fire_resistance"] = mcl_potions.fire_resistance_func
+-- mcl_mobs.effect_functions["night_vision"] = mcl_potions.night_vision_func
+-- mcl_mobs.effect_functions["water_breathing"] = mcl_potions.water_breathing_func
+-- mcl_mobs.effect_functions["leaping"] = mcl_potions.leaping_func
+-- mcl_mobs.effect_functions["swiftness"] = mcl_potions.swiftness_func
+-- mcl_mobs.effect_functions["heal"] = mcl_potions.healing_func
+-- mcl_mobs.effect_functions["bad_omen"] = mcl_potions.bad_omen_func
+-- mcl_mobs.effect_functions["withering"] = mcl_potions.withering_func
 
 -- give withering to players in a wither rose
 local etime = 0