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## RRD database graphing tool. Reads all databases from a directory and generates graphs from each
## of them.
##
## The generated graphs include
##
## - Temperature for today and yesterday
## - Temperature for current month and previous month
## - Relative humidity for today and yesterday
## - Relative humidity for current month and previous month
## - Pressure for today and yesterday
## - Pressure for current month and previous month
##
## The database directory is constructed from the path to this executable, by using the relative
## path ``../database``.
##
## The graphs are output to directory specified on the command line.
import os
import osproc
import strformat
import times
proc getLastDayOfCurrentMonth(): string =
let now = times.now()
let days = getDaysInMonth(now.month, now.year)
result = &"{now.year}{ord(now.month):02}{days:02}"
proc getFirstDayOfCurrentMonth(): string =
let now = times.now()
result = &"{now.year}{ord(now.month):02}01"
proc getFirstDayOfPreviousMonth(): string =
let now = times.now()
let beginningOfMonth = initDateTime(1, now.month, now.year, 0, 0, 0)
let endOfPrevMonth = beginningOfMonth - 1.days
result = &"{endOfPrevMonth.year}{ord(endOfPrevMonth.month):02}01"
proc secondsInPrevMonth(): int =
let beginningOfMonth = initDateTime(1, times.now().month, times.now().year, 0, 0, 0)
let endOfPrevMonth = beginningOfMonth - 1.days
let days = getDaysInMonth(endOfPrevMonth.month, endOfPrevMonth.year)
result = days * 24 * 60 * 60
proc getDaysForMonthGraph(): int =
let now = times.now()
let beginningOfMonth = initDateTime(1, now.month, now.year, 0, 0, 0)
let endOfPrevMonth = beginningOfMonth - 1.days
result = max(getDaysInMonth(beginningOfMonth.month, beginningOfMonth.year),
getDaysInMonth(endOfPrevMonth.month, endOfPrevMonth.year))
let
databaseDir = getAppDir().parentDir() / "database"
outputDir = paramStr(1)
width = 800
height = 600
lastDayOfCurrentMonth = getLastDayOfCurrentMonth()
firstDayOfCurrentMonth = getFirstDayOfCurrentMonth()
firstDayOfPreviousMonth = getFirstDayOfPreviousMonth()
proc graph(filename, title, vlabel: string, args: varargs[string, `$`]) =
var cmdline: seq[string] = @[
"graph", joinPath(outputDir, filename),
"--width", $width,
"--height", $height,
"--title", title,
"--vertical-label", vlabel,
] & @args
echo(&"Generating {joinPath(outputDir, filename)} ...")
let p = startProcess("rrdtool", args=cmdline,
options={poStdErrToStdOut, poUsePath, poParentStreams})
if p.waitForExit() != 0:
echo("failed")
quit(1)
for database in walkFiles(joinPath(databaseDir, "*.rrd")):
let (_, base, _) = splitFile(database)
graph(&"{base}-temperature-today.png", "Temperature", "Celcius",
"--end", "23:59 today",
"--start", "00:00 today",
"--alt-autoscale",
"--left-axis-format", "%.1lf",
&"DEF:temp1={database}:temperature:AVERAGE",
&"DEF:temp2={database}:temperature:AVERAGE:end=00\\:00 today:start=end-24h",
"LINE1:temp1#000000:today",
"LINE1:temp2#FF0000:yesterday",
"SHIFT:temp2:86400",
)
graph(&"{base}-temperature-month.png", "Temperature", "Celcius",
"--start", &"00:00 {firstDayOfCurrentMonth}",
"--end", &"start+{getDaysForMonthGraph()}days",
"--step", "3600",
"--alt-autoscale",
"--x-grid", "DAY:1:DAY:1:DAY:1:86400:%d",
&"DEF:curr={database}:temperature:AVERAGE",
&"DEF:prev={database}:temperature:AVERAGE:end=00\\:00 {firstDayOfCurrentMonth}:start=00\\:00 {firstDayOfPreviousMonth}",
"LINE1:curr#000000:current month",
"LINE1:prev#FF0000:previous month",
&"SHIFT:prev:{secondsInPrevMonth()}",
)
graph(&"{base}-humidity-today.png", "Relative humidity", "%",
"--end", "23:59 today",
"--start", "00:00 today",
&"DEF:humi1={database}:humidity:AVERAGE",
&"DEF:humi2={database}:humidity:AVERAGE:end=00\\:00 today:start=end-24h",
"LINE1:humi1#000000:today",
"LINE1:humi2#FF0000:yesterday",
"SHIFT:humi2:86400",
)
graph(&"{base}-humidity-month.png", "Relative humidity", "%",
"--start", &"00:00 {firstDayOfCurrentMonth}",
"--end", &"start+{getDaysForMonthGraph()}days",
"--step", "3600",
"--alt-autoscale",
"--x-grid", "DAY:1:DAY:1:DAY:1:86400:%d",
&"DEF:curr={database}:humidity:AVERAGE",
&"DEF:prev={database}:humidity:AVERAGE:end=00\\:00 {firstDayOfCurrentMonth}:start=00\\:00 {firstDayOfPreviousMonth}",
"LINE1:curr#000000:current month",
"LINE1:prev#FF0000:previous month",
&"SHIFT:prev:{secondsInPrevMonth()}",
)
graph(&"{base}-pressure-today.png", "Pressure", "Pascal",
"--end", "23:59 today",
"--start", "00:00 today",
"--alt-autoscale",
"--left-axis-format", "%.1lf",
&"DEF:pres1={database}:pressure:AVERAGE",
&"DEF:pres2={database}:pressure:AVERAGE:end=00\\:00 today:start=end-24h",
"LINE1:pres1#000000:today",
"LINE1:pres2#FF0000:yesterday",
"SHIFT:pres2:86400",
)
graph(&"{base}-pressure-month.png", "Pressure", "Pascal",
"--start", &"00:00 {firstDayOfCurrentMonth}",
"--end", &"start+{getDaysForMonthGraph()}days",
"--step", "3600",
"--alt-autoscale",
"--left-axis-format", "%.1lf",
"--x-grid", "DAY:1:DAY:1:DAY:1:86400:%d",
&"DEF:curr={database}:pressure:AVERAGE",
&"DEF:prev={database}:pressure:AVERAGE:end=00\\:00 {firstDayOfCurrentMonth}:start=00\\:00 {firstDayOfPreviousMonth}",
"LINE1:curr#000000:current month",
"LINE1:prev#FF0000:previous month",
&"SHIFT:prev:{secondsInPrevMonth()}",
)
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