90 lines
2.0 KiB
Lua
90 lines
2.0 KiB
Lua
local _ENV = mkmodule('json')
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local internal = require 'json.internal'
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local fs = dfhack.filesystem
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encode_defaults = {
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-- For compatibility with jsonxx (C++)
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pretty = true,
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indent = '\t',
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}
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function encode(data, options, msg)
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local opts = {}
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for k, v in pairs(encode_defaults) do opts[k] = v end
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for k, v in pairs(options or {}) do opts[k] = v end
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return internal:encode(data, msg, opts)
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end
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function encode_file(data, path, ...)
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if fs.isdir(path) then
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error('Is a directory: ' .. path)
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end
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local contents = encode(data, ...)
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local f = io.open(path, 'w')
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if not f then
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error('Could not write to ' .. tostring(path))
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end
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f:write(contents)
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f:close()
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end
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function decode(data, msg)
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return internal:decode(data, msg)
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end
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function decode_file(path, ...)
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local f = io.open(path)
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if not f then
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error('Could not read from ' .. tostring(path))
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end
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local contents = f:read('*all')
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f:close()
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return decode(contents, ...)
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end
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local _file = defclass()
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function _file:init(opts)
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self.path = opts.path
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self.data = {}
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self.exists = false
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self:read(opts.strict)
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end
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function _file:read(strict)
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if not fs.exists(self.path) then
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if strict then
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error('cannot read file: ' .. self.path)
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else
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self.data = {}
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end
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else
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self.exists = true
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local ok, err = pcall(function() self.data = decode_file(self.path) end)
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if not ok then
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if strict then
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error(('cannot decode file: %s: %s'):format(self.path, err))
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end
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self.data = {}
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end
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end
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return self.data
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end
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function _file:write(data)
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if data then
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self.data = data
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end
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encode_file(self.data, self.path)
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self.exists = true
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end
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function _file:__tostring()
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return ('<json file: %s>'):format(self.path)
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end
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function open(path, strict)
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return _file{path=path, strict=strict}
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end
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return _ENV
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