mods that hopefully work for a TechAge-based pack

mods/yl_canned_food_mtg/internal.lua

@@ -0,0 +1,96 @@
+-- The functions and variables in this file are only for use in the mod itself.
+-- Those that do real work should be local and wrapped in public functions
+local function log(text)
+    local logmessage = yl_canned_food_mtg.t("log_prefix", yl_canned_food_mtg.modname, text)
+    if yl_canned_food_mtg.settings.debug then minetest.log("action", logmessage) end
+    return logmessage
+end
+
+function yl_canned_food_mtg.log(text) return log(text) end
+
+local function get_savepath()
+    local savepath = yl_canned_food_mtg.worldpath .. yl_canned_food_mtg.settings.save_path
+    log(yl_canned_food_mtg.t("log_prefix", dump(savepath), ""))
+    return savepath
+end
+
+local function get_filepath(filename)
+    local path_to_file = get_savepath() .. DIR_DELIM .. filename .. ".json"
+    log(yl_canned_food_mtg.t("get_filepath", dump(filename), dump(path_to_file)))
+    return path_to_file
+end
+
+local function save_json(filename, content)
+    if type(filename) ~= "string" or type(content) ~= "table" then
+        return false
+    end
+    local savepath = get_filepath(filename)
+    local savecontent = minetest.write_json(content)
+    return minetest.safe_file_write(savepath, savecontent)
+end
+
+local function load_json(path)
+    local file = io.open(path, "r")
+    if not file then
+        return false, yl_canned_food_mtg.t("error_cannot_open_file", dump(path))
+    end
+
+    local content = file:read("*all")
+    file:close()
+
+    if not content then
+        return false, yl_canned_food_mtg.t("error_cannot_read_file", dump(path))
+    end
+
+    return true, minetest.parse_json(content)
+end
+
+-- Public functions wrap the private ones, so they can be exchanged easily
+
+function yl_canned_food_mtg.get_filepath(filename)
+    return get_filepath(filename)
+end
+
+function yl_canned_food_mtg.load(filename, ...) return load_json(filename, ...) end
+
+function yl_canned_food_mtg.save(filename, content, ...)
+    return save_json(filename, content, ...)
+end
+
+-- Read data
+--
+
+local function get_data()
+
+    local filename = yl_canned_food_mtg.settings.save_path
+    local filepath = yl_canned_food_mtg.get_filepath(filename)
+    yl_canned_food_mtg.json_recipes = yl_canned_food_mtg.load(filepath) or {}
+
+    return yl_canned_food_mtg.legacy_recipes or yl_canned_food_mtg.default_recipes or yl_canned_food_mtg.json_recipes
+end
+
+function yl_canned_food_mtg.get_data()
+    return get_data()
+end
+
+-- Check sttings match
+--
+
+local function check_settings_match()
+    if (yl_canned_food.settings.legacy == true) and (yl_canned_food_mtg.settings.data_source == "legacy") then
+        -- legacy: Nodenames looke like canned_food:apple_jam
+        return true
+    elseif (yl_canned_food.settings.legacy == false) and (yl_canned_food_mtg.settings.data_source == "default") then
+        -- default: Nodenames looke like yl_canned_food:apple_jam
+        return true
+    elseif (yl_canned_food_mtg.settings.data_source == "json") then
+        -- json: It's the user's responsibility to adjust the nodenames in the json
+        return true
+    else
+        return false
+    end
+end
+
+function yl_canned_food_mtg.check_settings_match()
+    return check_settings_match()
+end