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#!/bin/bash
# Simona Pisano - 2018-12-18
# simona-scripts
# Libertamente utilizzabile sotto GPL v3
#exchange-info() {
#read echange from internet
query_http="http://free.currencyconverterapi.com/api/v5/convert?q=EUR_USD&compact=y"
currency_echange="EUR_USD"
raw_echange=`wget -q -O - ${query_http}`
value=0
#echo "raw_echange=$raw_echange"
#raw_echange={"EUR_USD":{"val":1.14075}}
if [[ $raw_echange != "" ]] ; then
if [[ ${raw_echange:1:10} == "\"${currency_echange}\":" ]] ; then
value=${raw_echange#*\"val\":} #estract to right of "val":
if [[ ${value:${#value}-2:2} == "}}" ]]; then
value=${value:0:${#value}-2} #remove last two {{
if [[ $value != "" ]] ; then
echo -n "Echange EURO vs US DOLLAR: 1€ = ${value}\$"
fi
fi
fi
if [[ $value != "" ]]; then
#read cfg with yesterday's echange
today=`date +%Y%m%d`
file_name="${HOME}/.last_exch.log"
if [[ -r $file_name ]]; then
count_row=0
prop="blank"
cont=""
last_prop="blank"
last_cont=""
while read line ; do
let count_row+=1
last_prop=$prop
last_cont=$cont
prop=${line%=*}
cont=${line#*=}
if [[ $count_row -gt 2 ]]; then #can't happen
echo -n " [something goes wrong (1) !!!] "
echo -n -e "Value-${today}-${currency_echange}=${value}\n" >$file_name #reset file
break;
fi
done < $file_name
#newer value
get_date=${prop:6:8}
if [[ $get_date == "" ]]; then #to-do correct check string
echo -n " [something goes wrong (2) !!!] "
echo -n "Value-${today}-${currency_echange}=${value}\n" >$file_name
echo ""
exit
fi
if [[ $today != $get_date ]]; then #add today's new value and store old one
echo -n -e "${prop}=${cont}\n" >$file_name
echo -n -e "Value-${today}-${currency_echange}=${value}\n" >>$file_name
fi
#older value
[[ $last_prop != "blank" ]] && { prop=$last_prop; cont=$last_cont; }
if [[ $prop != "blank" ]]; then
# ho prop e last_prop da scegliere
get_date=${prop:6:8}
if [[ $get_date == "" ]]; then #to-do correct check string
echo -n " [something goes wrong (3) !!!] "
echo -n -e "Value-${today}-${currency_echange}=${value}\n" >$file_name
echo -e -n "\n"
exit
fi
#data 20181208
#idx 01234567
if [[ $get_date != $today ]]; then
calc=`echo "$value - $cont" | bc`
[[ ${calc:0:1} == "." ]] && calc="0${calc}" #add 0 if start with .459859
[[ ${calc:0:1} != "-" ]] && calc="+${calc}" #add + if not negative sign present
echo -n " (today is: ${today:6:2}/${today:4:2}/${today:0:4}, "\
"diff from ${get_date:6:2}/${get_date:4:2}/${get_date:0:4} :${calc})"
fi
else #if file blank
echo -e -n "Value-${today}-${currency_echange}=${value}\n" >$file_name
fi
else #if file do not exist
#Value-20181208-EUR_USD
#0123456789
# 10 15 19
echo -e -n "Value-${today}-${currency_echange}=${value}\n" >$file_name
fi
echo -e -n "\n"
fi
else
echo "Offline."
fi
#}
#exchange-info()
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