Weather app backend to scrape and parse the Australian BOM xml weather data for Sydney. Output later displayed with Swaybar. Written in Julia ("julialang").

  

#!/usr/bin/env julia 

using FTPClient

ftp = FTP("ftp://ftp.bom.gov.au/")
download(ftp, "anon/gen/fwo/IDN11060.xml", "/home/brett/.IDN11060.xml")
close(ftp)

WEBPAGE = readlines("/home/brett/.IDN11060.xml", keep=true)

#	Initialise global variables:
SECTIONLINE = 1
LINE = 1
MAXTEMP = 0		
MINTEMP_NEXT = 0
MAXTEMP_NEXT = 0
PRECIP_TODAY = "unknown" 
PRECIP_NEXT = "unknown" 
PRECIP_RESULT = "unknown" 
TEMP_RESULT = "unknown" 

# Get to line number where substring "Sydney Metropolitan" is found within a string:

while !occursin("Sydney Metropolitan", WEBPAGE[SECTIONLINE])
    global SECTIONLINE = SECTIONLINE + 1
end
println("`Sydney Metropolitan` section begins at line: ", SECTIONLINE)

LINE = SECTIONLINE
while MAXTEMP == 0
  global LINE = LINE + 1
  if occursin("forecast-period index=\"1\"", WEBPAGE[LINE])
    global MAXTEMP = 99
  elseif occursin("air_temperature_maximum", WEBPAGE[LINE])
    global MAXTEMP = filter(isnumeric, WEBPAGE[LINE])
  end
end
println("Today's Max temp: ", MAXTEMP)

LINE = SECTIONLINE
while cmp(PRECIP_TODAY, "unknown") == 0
  global LINE = LINE + 1
  if occursin("precis", WEBPAGE[LINE])
    global PRECIP_TODAY = WEBPAGE[LINE]
  end
end
println("Today's precipitation: ", PRECIP_TODAY)

#	locate the 'tomorrow' section:
while !occursin("forecast-period index=\"1\"", WEBPAGE[SECTIONLINE])
    global SECTIONLINE = SECTIONLINE + 1
end
println("Sydney Metropolitan `tomorrow` section begins at line: ", SECTIONLINE)

#	tomorrow's minimum:
LINE = SECTIONLINE
while MINTEMP_NEXT == 0
  global LINE = LINE + 1
  if occursin("air_temperature_minimum", WEBPAGE[LINE])
    global MINTEMP_NEXT = filter(isnumeric, WEBPAGE[LINE])
  end
end
println("Tomorrow's Min temp: ", MINTEMP_NEXT)

#	tomorrow's maximum
LINE = SECTIONLINE
while MAXTEMP_NEXT == 0
  global LINE = LINE + 1
  if occursin("air_temperature_maximum", WEBPAGE[LINE])
    global MAXTEMP_NEXT = filter(isnumeric, WEBPAGE[LINE])
  end
end
println("Tomorrow's Max temp: ", MAXTEMP_NEXT)

# Extract tomorrow's precipitation from "Sydney Metropolitan" section: 
LINE = SECTIONLINE                                                                                              
while cmp(PRECIP_NEXT, "unknown") == 0                                                                         
  global LINE = LINE + 1                                                                                        
  if occursin("precis", WEBPAGE[LINE])                                                                          
    global PRECIP_NEXT = WEBPAGE[LINE]   
  end
end
println("Tomorrow's precipitation: ", PRECIP_NEXT)

# descriptions; storm, clear, cloudy, overcast, sunny
if occursin("torm", PRECIP_TODAY)                                                                                      
  global PRECIP_RESULT = "Storm"                                        
elseif occursin("ain", PRECIP_TODAY) || occursin("hower", PRECIP_TODAY) || occursin("rizzle", PRECIP_TODAY)            
  global PRECIP_RESULT = "Rain"                                                                 
elseif occursin("loud", PRECIP_TODAY)  || occursin("vercast", PRECIP_TODAY)                                            
  global PRECIP_RESULT = "Cloudy"      
elseif occursin("unny", PRECIP_TODAY)  || occursin("lear", PRECIP_TODAY)                                               
  global PRECIP_RESULT = "Sunny"                                 
else                                                                                                                   
  global PRECIP_RESULT = "-"                                                                                           
end                                                                                                                    
println("Today's precipitation: ", PRECIP_RESULT)                                                                      
if occursin("torm", PRECIP_NEXT)                                                                                       
  global PRECIP_RESULT = PRECIP_RESULT * " Storm"                                           
elseif occursin("ain", PRECIP_NEXT) || occursin("hower", PRECIP_NEXT) || occursin("rizzle", PRECIP_NEXT)               
  global PRECIP_RESULT = PRECIP_RESULT * " Rain"  
elseif occursin("loud", PRECIP_NEXT)  || occursin("vercast", PRECIP_NEXT)
  global PRECIP_RESULT = PRECIP_RESULT * " Cloudy"                                            
elseif occursin("unny", PRECIP_NEXT)  || occursin("lear", PRECIP_NEXT)                                                 
  global PRECIP_RESULT = PRECIP_RESULT * " Sunny " 
else                                                                                                                   
  global PRECIP_RESULT = PRECIP_RESULT * "-"                                                                           
end
println("Today and tomorrow's precipitation: ", PRECIP_RESULT)

if MAXTEMP == 99
  MAXTEMP_FINAL = ""
else 
  MAXTEMP_FINAL = string(MAXTEMP)
end

TEMP_RESULT = MAXTEMP_FINAL * "° " * MINTEMP_NEXT * "° " * MAXTEMP_NEXT * "°"
println("Today and tomorrow's temp: ", TEMP_RESULT)

open("/home/brett/.weather_text_temp_syd", "w") do f                                    
        write(f, TEMP_RESULT)                                                                                                                           
end

open("/home/brett/.weather_text_syd", "w") do f                                    
        write(f, PRECIP_RESULT)                                                                     end