126 lines
3.6 KiB
Plaintext
126 lines
3.6 KiB
Plaintext
VERSION = "2.2.0"
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---- `0` = The value 0 if `version1` is the same as `version2`
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---- `-1` = The value less than 0 if `version1` is older than `version2`
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---- `1` = The value greater than 0 if `version1` newer than `version2 `
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---@param version1 string
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---@param version2 string
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---@return -1|0|1
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local function compare_version_to(version1, version2)
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local major1, minor1, patch1 = version1:match("(%d+)%.(%d+)%.(%d+)")
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local major2, minor2, patch2 = version2:match("(%d+)%.(%d+)%.(%d+)")
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-- There's probably a better way, but I'm lazy atm :P
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if major1 > major2 then return 1 end
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if major1 < major2 then return -1 end
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if minor1 > minor2 then return 1 end
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if minor1 < minor2 then return -1 end
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if patch1 > patch2 then return 1 end
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if patch1 < patch2 then return -1 end
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return 0
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end
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------------------------
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-- Migration Functions
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------------------------
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-- 2.1.X -> 2.2.0
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-- Release all world objects to migrate old saves to use the
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-- per-object spawning system instead
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local function migrate_world_objects()
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local hf_obj_spawned = alife_storage_manager.get_state().hf_obj_spawned
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if not hf_obj_spawned then return end
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alife():iterate_objects(function(se_obj)
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local data = hf_obj_manager.get_data(se_obj.id)
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if data and data.is_world_obj then
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alife_release(se_obj, "[HF] Releasing old world object with id " .. se_obj.id)
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end
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end)
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alife_storage_manager.get_state().hf_obj_spawned = nil
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end
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-- pre-2.0.0
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-- Initialise metadata
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local function reinit_obj_data()
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local sim = alife()
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for i=1,65534 do
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local se_obj = sim:object(i)
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if se_obj then
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local placeable_type = hf_furniture_types.get_type(se_obj)
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if placeable_type then
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-- Initialise data store
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hf_obj_manager.set_data(se_obj.id, {})
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if placeable_type == "light" then
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-- Switch off light when it is online
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hf_obj_manager.update_data(obj_id, {is_on=false})
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end
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end
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end
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end
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end
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----------------------------------------------------------------
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-- Generic functions to migrate save based on semver versioning
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----------------------------------------------------------------
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-- Array of functions for migrating from old versions
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-- Assumed to be sorted already
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local migration_functions = {
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{
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version = "2.1.0",
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functor = reinit_obj_data,
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},
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{
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version = "2.2.0",
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functor = migrate_world_objects,
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}
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}
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---@return number|nil
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local function get_starting_migration_i(version)
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for i, migration_function_data in ipairs(migration_functions) do
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-- Exit if current version is older than a version with migrate function
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if compare_version_to(version, migration_function_data.version) == -1 then
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return i
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end
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end
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end
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---@param version string
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local function migrate_save(version)
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local start_i = get_starting_migration_i(version)
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if not start_i then return end
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for i=start_i, #migration_functions do
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migration_functions[i].functor()
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end
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end
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-------------
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-- Callbacks
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-------------
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function save_state(mdata)
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mdata.hf_version = VERSION
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end
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function actor_on_init()
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local save_hf_version = alife_storage_manager.get_state().hf_version
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if not save_hf_version or save_hf_version ~= VERSION then
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-- Save has a different version from that which is loaded
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migrate_save(save_hf_version or "0.0.0")
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end
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end
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function on_game_start()
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RegisterScriptCallback("save_state", save_state)
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RegisterScriptCallback("actor_on_init", actor_on_init)
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end
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