intervals.lua

local intervals = {}


intervals.IntervalSecondsMap = {
    ["5m"] = 300,
    ["15m"] = 900,
    ["1h"] = 3600,
    ["4h"] = 14400,
    ["12h"] = 57600,
    ["6h"] = 21600,
    ["1d"] = 86400,
    ["7d"] = 86400 * 7,
    ["1M"] = 2592000 
  }

function intervals.getIntervalStart(timestamp, interval)
    timestamp = math.floor(timestamp)  -- Ensure timestamp is an integer
    local date = os.date("!*t", timestamp)
  
    if interval == "1h" then
      date.min = 0
      date.sec = 0
    elseif interval == "15m" then
      date.min = 0
      date.sec = 0
    elseif interval == "4h" then
      date.min = 0
      date.sec = 0
      date.hour = date.hour - (date.hour % 4)
    elseif interval == "1d" then
      date.hour = 0
      date.min = 0
      date.sec = 0
    elseif interval == "1M" then
      date.day = 1
      date.hour = 0
      date.min = 0
      date.sec = 0
    else
      error("Unsupported interval: " .. interval)
    end
  
    return os.time(date)
  end

  return intervals