59 lines
1.6 KiB
Lua
59 lines
1.6 KiB
Lua
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logistica.proq = {}
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local QUEUE_KEY = "log_proq"
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local DELIM = "|"
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-- listOfPositions must be a list (naturally numbered table) of position vectors
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local function save_queue(meta, listOfPositions)
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local tableOfStrings = {}
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for _,v in ipairs(listOfPositions) do
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table.insert(tableOfStrings, vector.to_string(v))
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end
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local singleString = table.concat(tableOfStrings, DELIM)
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meta:set_string(singleString)
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end
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-- listOfPositions must be a list (naturally numbered table) of position vectors
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function logistica.proq.add(pos, listOfPositions)
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local meta = minetest.get_meta(pos)
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local positions = logistica.proq.get_all(pos)
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for _, v in ipairs(listOfPositions) do
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table.insert(positions, v)
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end
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save_queue(meta, positions)
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end
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-- returns a table of up to the next N positions
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function logistica.proq.pop_next(pos, count)
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local meta = minetest.get_meta(pos)
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local positions = logistica.proq.get_all(pos)
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local ret = {}
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local rem = {}
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for i, v in ipairs(positions) do
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if (i <= count) then
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table.insert(ret, v)
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else
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table.insert(rem, v)
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end
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end
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save_queue(meta, rem)
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return ret
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end
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function logistica.proq.get_all(pos)
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local meta = minetest.get_meta(pos)
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if not meta:contains(QUEUE_KEY) then return {} end
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local compressedString = meta:get_string(QUEUE_KEY)
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local positionStrings = string.split(compressedString, DELIM, false)
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local positions = {}
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for _, v in ipairs(positionStrings) do
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local vector = vector.from_string(v)
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if vector then
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table.insert(positions, vector)
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end
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end
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return positions
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end
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