#!/bin/sh
#Arguments:
# 1 = Link to yahoo weather
# 2 = output dir
# 3 = Biggest weather code to consider

url=${1-"weather.yahooapis.com/forecastrss?w=455861&u=c"}
out=${2-"/tmp"}
big=${3-"47"}
let big="$big"+1

# ========sakya's translation========
# In order to work with QtLockscreen I need to, in the WORST case scenario:
# http://weather.yahoo.com/weather.yahooapis.com/forecastrss?w=455861&u=c?unit=c
# 1) Remove the 'http://weather.yahoo.com/'
# 2) Translate the appended '?unit=X' to '&u=X'
url=`echo "$url" | sed s/weather.yahoo.com\\\/// | sed 's/&u=[cf]//' | sed 's/?unit/\&u/'`
# the only problem is that now it requires the ?unit=c to recognize celcius, but for the qtlockscreen it is ok.

code="44d"
curr="0"
cond="Unknown"
high="0"
loww="0"

# Getting all the necessary info.
wget --user-agent="" -q -t 1 -T 10 -O "$out/ywtemp.xml" "$url" || { exit 1; }
# Now I have to find out the condition code in order to select the icon to download
code=`cat "$out/ywtemp.xml" | grep -o code=\".* -m 1 | sed s/code=\"// | sed s/\".*//`|| { exit 1; }

# I think that it is safe to translate odd codes to night and even codes to day. It is difficult to get each match on the site, there's nothing anywhere to look into. The weather developer API does not stabilish a correlation.
  if [ "$code" -lt "$big" ] 
  then
    # It is lower than the bigger known good weather code (47?), so, it isn't the unknown code 3200 or any other also unknown. Now the unknown icon are the 44d and 44n that are equal N/A:
    if [ ` expr $code % 2 ` -eq 0 ]
    then
      code="$code""d";
    else
      code="$code""n";
    fi
    curr=`cat "$out/ywtemp.xml" | grep -o temp=\".* -m 1 | sed s/temp=\"// | sed s/\".*//` || { exit 1; }
    cond=`cat "$out/ywtemp.xml" | grep -o text=\".* -m 1 | sed s/text=\"// | sed s/\".*//` || { exit 1; }
    high=`cat "$out/ywtemp.xml" | grep -o high=\".* -m 1 | sed s/high=\"// | sed s/\".*//` || { exit 1; }
    loww=`cat "$out/ywtemp.xml" | grep -o low=\".* -m 1  | sed s/low=\"//  | sed s/\".*//` || { exit 1; }
  else
    code="44d";
  fi

# Getting the icon...
wget --user-agent="" -q -t 1 -T 10 -O "$out/ywtemp.png" "l.yimg.com/os/mit/media/m/weather/images/icons/l/$code-100567.png" || { exit 1; }

echo "Current: $curr"
echo "Conditions: $cond"
echo "High: $high"
echo "Low: $loww"
echo "Image: $out/ywtemp.png"