WeatherCat storm log generator

stormlog.py

#! /usr/local/bin/python3

# Storm Log script
# For WeatherCat - https://trixology.com
# By Jason Snell <jsnell@sixcolors.com>

import re
from collections import defaultdict
import datetime

# Path to folder containing WeatherCat data files in year-folder format
# It's usually '/Users/[your-username]/Library/WeatherCatData/[your-location]/'

weatherCatPath = '/Users/admin/Library/WeatherCatData/Location1/'

# Path to folder where you want image to be saved

savePath = '/Library/Webserver/Documents/snellzone/weather/'

maxprecip = defaultdict(lambda: -99999)
diff = {}
today = datetime.date.today()
month = int(today.strftime('%m'))
monthstr = str(month + 100)[-2:]

day = today.strftime('%d')
year = today.strftime('%Y')
datelist = []
stormList = []
stormStart = []
stormEnd = []
theOutput = ''
newLine = '\n'

datapoint = re.compile(r't:([0-9]{2})[0-9]{4}')
rainpoint = re.compile(r'P:([0-9]{1,3}\.[0-9]{2})')

if month > 7:
    monthStart = 7
else:
    monthStart = -5

for i in range(monthStart, month+1, 1):

    if i < 1 :
        yearcode = str(int(year) - 1)
        monthcode = 12 + i
    else:
        monthcode = i
        yearcode = year

    filepath = (weatherCatPath + f'{yearcode}/{monthcode}_WeatherCatData.cat')
    file = open(filepath, 'r')
    monthstring = str(monthcode + 100)[-2:]

    for count, line in enumerate(file):
        if count > 10:
            theday = datapoint.search(line)
            todayDay = (f'{yearcode}-{monthstring}-' + (theday.group(1)))
            therain = rainpoint.search(line)
            rainfloat = float(therain.group(1))
            maxprecip[todayDay] = round(rainfloat * 0.03937007874, 2)

    file.close()

# now loop through from monthstring + day
# plucking values for 7 days and putting them in a new list or dict

theRain = list(maxprecip.values())
theDates = list(maxprecip.keys())

theCounter = 0
totalRain = 0

# Loops through all rain days but the current day

for i in range(1,len(theRain)-1):
    # If there was rain on this day, it updates the total rain count.
    # If this is the first day of rain, it marks this as the start.
    # It's marked as the end date, but that isn't used unless the
    # next date has no rain.

    if theRain[i] > 0 :
        if totalRain == 0 :
            sequenceStart = theDates[i]
        totalRain += theRain[i]
        if i == len(theRain)-1 :
            pass
        else:
            sequenceEnd = theDates[i]
    else:
        # If there was no rain, but total rain is non-zero, mark this
        # as the end of the rain and add all the results to the stack.
        # Thus ends this storm entry.
        if (totalRain > 0 ):
            totalRain += theRain[i]
            totalRain = round(totalRain,2)
            if i != len(theRain)-1 :
			    # don't save storm total if rain continued on last day
                stormList.append(totalRain)
                stormEnd.append(sequenceEnd)
                stormStart.append(sequenceStart)
                totalRain = 0

# This handles the current day and wraps it all up.

if theRain[-1] > 0 :
    if totalRain == 0 :
        # If there was rain on the current day but not before
        sequenceStart = theDates[-1]
        stormStart.append(sequenceStart)
    totalRain += theRain[-1]
    sequenceEnd = theDates[-1]
    totalRain = round(totalRain,2)
    stormStart.append(sequenceStart)
    stormList.append(totalRain)
    stormEnd.append(f'{year}-{monthstr}-{day}')

else:
    # there's no rain on the current day.
    if (totalRain > 0 ):
        # if there was an ongoing storm, close it out
        totalRain = round(totalRain,2)
        stormList.append(totalRain)
        stormEnd.append(theDates[-2])
        stormStart.append(sequenceStart)


# Now we're outputting the storm log, but removing low-precip storms.

for i in range((len(stormList)-1), 0, -1):

    if stormList[i] > .09:
        startDate = datetime.datetime.strptime(stormStart[i], '%Y-%m-%d')
        endDate = datetime.datetime.strptime(stormEnd[i], '%Y-%m-%d')
        difference = endDate - startDate

        startDatePretty = startDate.strftime('%b %e')
        endDatePretty = endDate.strftime('%b %e')

        totalDays = difference.days + 1
        if totalDays > 1 :
            theOutput = theOutput + (f'<li>{stormList[i]}" {startDatePretty}-{endDatePretty} ({totalDays} days)</li>')
        else:
            theOutput = theOutput + (f'<li>{stormList[i]}" {startDatePretty}</li>')

lastStorm = datetime.datetime.strptime(stormEnd[-1], '%Y-%m-%d')
stormDifference = datetime.datetime.now() - lastStorm


if stormDifference.days < 2:
    theOutputPrefix = (str(stormList[-1]) + ' inches in current storm.</p>' +
                       '<p><img width="400" src="/weather/rainhistory.png"></p>'
                       '<p><a href="https://abclocal.go.com/kgo/doppler?id=5750606&'
                       'mapnum=1&anim=true"><img src="https://cdn.abclocal.go.com/three/'
                       'kgo/weather/maps/nbay1_1280.jpg" width="400"></a></p>'
                       '<h3>Storm Log</h3>')
else:
    theOutputPrefix = '</p><h3>Storm Log</h3>'

if stormDifference.days < 14:
    theOutputPrefix = (theOutputPrefix +
                       '<p>Last two weeks of rain:</p><p><img '
                       'src="/weather/latestrain1.png" width="400" /></p><p><img '
                       'src="/weather/latestrain2.png" width="400" /></p>')


if theOutput:

    theOutput = '<p>Rain events:</p><ul>' + theOutput + '</ul>'

outFile = open((savePath + 'stormlog.txt'), 'w')
outFile.write(theOutputPrefix + theOutput)
outFile.close()