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#!/bin/sh
set -Eeuo pipefail
source data/weather-schema
FIELD_COUNT=$(echo $SCHEMA | grep -o ";" | wc -l)
URL=https://ssl.smn.gob.ar/dpd/zipopendata.php?dato=tiepre
TMPDIR=/tmp/weather
OUT=$HOME/.weather
CITY="La Plata"
print=false
help() {
cat <<EOF
Usage: $(basename $0) [OPTION]
This script will fetch a zip file from datos.gob.ar and extract the .txt that
holds the latest info gathered from all the weather stations in Argentina.
After that, all lines except the one containing the city specified by the \$CITY
variable will be removed and the data will be formated and saved in the \$OUT file
More info: https://datos.gob.ar/dataset/smn-estado-tiempo-presente
Default \$CITY selected: $CITY
Default \$OUT file: $OUT
Options:
-c Set the \$CITY variable
-C Cleanup tmp directory
-o Set the \$OUT file
-p Print the output instead of saving it
-h Print this message
EOF
}
cleanup() {
if [ -d $TMPDIR ]; then
rm -rf $TMPDIR/*
fi
}
# Parse args
while getopts "hCpc:" opt; do
case $opt in
h)
help
exit 0
;;
C)
cleanup
exit 0
;;
c)
CITY=$OPTARG
;;
o)
OUT=$OPTARG
;;
p)
print=true
;;
\?)
echo "" >&2
help
exit 1
;;
esac
done
# Create dir if not exists
if [ ! -d /tmp/weather ]; then
mkdir -p $TMPDIR
fi
# Get the dataset
curl -s "$URL" --output $TMPDIR/weather.zip
unzip -q $TMPDIR/weather.zip -d $TMPDIR
# Sanitize
iconv -f latin1 -t utf8 $TMPDIR/*.txt | tr -d ' ' > $TMPDIR/final.txt
# Cut city data
data=$(cat $TMPDIR/final.txt | grep -i "$CITY" || echo "notfound")
if [ "$data" = "notfound" ]; then
echo "Error: City/Weather station not found"
cleanup
exit 1
fi
# Process string
processed=""
for (( i = 0; i <= $FIELD_COUNT; i++ )); do
field_number=$(($i +1))
field=$(echo $SCHEMA | cut -d ";" -f $field_number)
value=$(echo $data | cut -d ";" -f $field_number)
line="${field}=$(echo ${value/\//} | sed -e 's/^[ ]*//')"
if [ ! $i = $FIELD_COUNT ]; then
processed="${processed}${line}\n"
else
processed="${processed}${line}"
fi
done
# Print or save?
if [ "$print" = true ]; then
echo -e "$processed"
else
if [ -f $OUT ]; then
rm $OUT
fi
echo -e "$processed" > $OUT
fi
# Cleanup
cleanup