Modul:TwitterSnowflake

Die Dokumentation für dieses Modul kann unter Modul:TwitterSnowflake/doc erstellt werden

local p = {};

local Date = require('Module:Date')._Date

p.snowflakeToDate = function (frame)
    format = frame.args["format"] or "!%c"
    epoch = tonumber(frame.args["epoch"]) or 1288834974
    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 + tostring(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

p.getDate = function (frame)
    -- just pass frame directly to snowflakeToDate, this wraps it but the args are the same plus
    frame.args["format"] = "%B %e, %Y"
    frame.args["epoch"] = tonumber(frame.args["epoch"]) or 1288834974
    epochdate = Date(os.date("%B %e, %Y", frame.args["epoch"]))
    twitterdate = Date(p.snowflakeToDate(frame))
    if twitterdate == epochdate then -- created before epoch, so can't determine the date
    	return -1
    end
    return Date(frame.args["date"]) - twitterdate
end

return p