Module:TwitterSnowflake/gen: Difference between revisions

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Usage

This generates a Snowflake ID of the current time, based off of Twitter's epoch.

Current ID: 1928522584039620608 ()

See also

• Module:TwitterSnowflake/gen
• Template:TwitterSnowflake/gen

The above documentation is transcluded from Module:TwitterSnowflake/gen/doc. (edit | history)
Editors can experiment in this module's sandbox (create | mirror) and testcases (create) pages.
Subpages of this module.

local p = {}

local function numberToBinStr(x)
	ret=""
	while x~=1 and x~=0 do
		ret=tostring(x%2)..ret
		x=math.modf(x/2)
	end
	ret=tostring(x)..ret
	return ret
end

function p.getSnowflake()
	local sequence = "000000000000" -- 12 sequence bits
	local shard = "0000000000" -- 10 shard bits
	local epoch = 1288834974
	local time = os.time()
	local timestamp = time - epoch
	local timestampbinary = numberToBinStr(timestamp..math.random(0,9)..math.random(0,9)..math.random(0,9)) -- lua only provides time, so we append three random digits as "milliseconds"
	local snowflakebinary = timestampbinary .. shard .. sequence
	return string.format("%18.0f",tonumber(snowflakebinary,2))
end

return p