local p = {}
local Date = require('Module:Date')._Date
function p.snowflakeToDate(frame)
local format = frame.args.format or "%B %e, %Y"
local epoch = tonumber(frame.args.epoch) or 1288834974
local id_str = frame.args.id_str
if type(id_str) ~= "string" then error("bad argument #1 (expected string, got " .. type(id_str) .. ")", 2) end
if type(format) ~= "string" then error("bad argument #2 (expected string, got " .. type(format) .. ")", 2) end
if type(epoch) ~= "number" then error("bad argument #3 (expected number, got " .. type(epoch) .. ")", 2) end
local hi, lo = 0, 0
local hiexp = 1
for c in id_str:gmatch(".") do
lo = lo * 10 + c
if lo >= 2^32 then
hi, lo = hi * 10^hiexp + math.floor(lo / 2^32), lo % 2^32
hiexp = 1
else hiexp = hiexp + 1 end
end
hi = hi * 10^(hiexp-1)
local timestamp = math.floor((hi * 1024 + math.floor(lo / 4194304)) / 1000) + epoch
return os.date(format, timestamp)
end
function p.getDate(frame)
-- just pass frame directly to snowflakeToDate, this wraps it but the args are the same plus
if (frame.args.id_str):match("%D") then -- not a number, so return -2
return -2
end
frame.args.format = "%B %e, %Y"
frame.args.epoch = tonumber(frame.args.epoch) or 1288834974
local epochdate = Date(os.date("%B %e, %Y", frame.args.epoch))
local twitterdate = Date(p.snowflakeToDate(frame))
if twitterdate == epochdate then -- created before epoch, so can't determine the date
return -1
end
local date = Date(frame.args.date) or 0 -- if we error here, then an input of no date causes an error, which is contrary to the entire way {{TwitterSnowflake/datecheck}} works
return date - twitterdate
end
return p
