65 lines
1.7 KiB
Lua
65 lines
1.7 KiB
Lua
--
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-- This file is part of the Doodle3D project (http://doodle3d.com).
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--
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-- @copyright 2013, Doodle3D
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-- @license This software is licensed under the terms of the GNU GPL v2 or later.
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-- See file LICENSE.txt or visit http://www.gnu.org/licenses/gpl.html for full license details.
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local log = require('util.logger')
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local utils = require('util.utils')
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local printerUtils = require('util.printer')
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local MOD_ABBR = "UACS"
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local M = {}
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function M.hasControl(ip)
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local controllerIP = M.getController()
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-- no controller stored? we have control
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if controllerIP == "" then return true end;
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-- controller stored is same as our (requesting) ip? we have control
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if(controllerIP == ip) then return true end;
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-- no printer connected? we have control
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local printer,msg = printerUtils.createPrinterOrFail()
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if not printer or not printer:hasSocket() then
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M.setController("") -- clear the controller
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return true
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end
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-- printer is idle (done printing)? we have control
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local state = printer:getState()
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if state == "idle" then -- TODO: define in constants somewhere
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M.setController("") -- clear controller
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return true
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end
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return false
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end
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function M.getController()
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local file, error = io.open('/tmp/controller.txt','r')
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if file == nil then
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--log:error(MOD_ABBR, "Util:Access: Can't read controller file. Error: "..error)
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return ""
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else
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controllerIP = file:read('*a')
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file:close()
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--strip trailing newline (useful when manually editing controller.txt)
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if controllerIP:find('\n') == controllerIP:len() then controllerIP = controllerIP:sub(0, -2) end
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return controllerIP
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end
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end
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function M.setController(ip)
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local file = io.open('/tmp/controller.txt','w')
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file:write(ip)
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file:flush()
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file:close()
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end
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return M
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