json.lua

local JSON = require("JSON")

local Json = {}

---@enum JsonType
JsonType = {
   ARRAY = "%b[]",
   DICTIONARY = "%b{}",
}

---@param str string
---@param outer_type JsonType?
---@return table?
function Json.decode(str, outer_type)
   local s, e = str:find(outer_type or JsonType.DICTIONARY, nil, false)

   if s == nil then
      return nil
   end

   str = str:sub(s, e)

   local decoded_obj = JSON:decode(str)

   if type(decoded_obj) ~= "table" then
      return nil
   end

   return decoded_obj
end

---@class encode_options
---@field pretty boolean
---@field indent string
---
---@param obj table
---@param options encode_options
---@return string?
function Json.encode(obj, options)
   local encoded_obj = JSON:encode(obj, nil, options)

   if encoded_obj == "[]" then
      options = options or {}

      if options.pretty then
         return "{\n}"
      else
         return "{}"
      end
   end

   return encoded_obj
end

return Json