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-- Copyright 2025 David Vazgenovich Shakaryan
local util = require('util')
local mp_utils = require('mp.utils')
local cacher = {}
local function wrap_func(obj, opts, func, func_name)
return function(_, ...)
local fn = table.concat({opts.prefix, func_name, ...}, '.')
local path = mp_utils.join_path(opts.directory, fn)
local f = mp_utils.file_info(path)
local data
if not f or os.time() - f.mtime > opts.time then
data = func(obj, ...)
if data then
util.write_json_file(path, data)
end
end
if f and not data then
print('using cached ' .. fn)
data = util.read_json_file(path)
end
return data
end
end
function cacher.wrap(obj, opts)
local proxy = {}
setmetatable(proxy, {
__index = function(t, k)
local v = obj[k]
if type(v) ~= 'function' or not opts.functions[k] then
return v
end
local fn = wrap_func(obj, opts, v, k)
t[k] = fn
return fn
end,
})
return proxy
end
return cacher
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