rp5 site parser

lang="ru"
place="Нижний Новгород"

file=$(curl -s -o - "http://pda.rp5.ru/?lang=${lang}&q=${place}")
links=$(echo ${file} | grep -o -e "p class=\"navy\">.*<form id=\"f\"" | grep -o -e "=[^=]*" | tail -n +2 | head -n -1)
code=$(echo ${links} | grep -Eo -e "\"[[:digit:]]+" | grep -Eo -e "[[:digit:]]+" | head -n 1)
name=$(echo ${links} | grep -Eo -e "${lang}\">[^<]+" | grep -Eo -e ">.+" | grep -Eo -e "[^>]+" | head -n 1)

file=$(wget -q -O - "http://rp5.ru/${code}/${lang}")

table6=$(echo ${file} | grep -Pzo "ftab_6_content(.|\n)*ftab_3_content")
dates6=($(echo ${table6} | grep -o -e "monthDay[^\<]*" | grep -o -e "[^>]*$"))
times6=($(echo ${table6} | grep -Eo -e "\"[nd][[:digit:]]? underlineRow\">[[:digit:]]+" | grep -o -e "[^>]*$"))
temperatures6=($(echo ${table6} | grep -Eo -e "class=\"t_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))
clouds6=($(echo ${table6} | grep -Eo -e "class=\"cc_0\"[^o]*" | grep -Eo -e "c[dn][[:digit:]]" | grep -Eo -e "[[:digit:]]+"))
conditions6=($(echo ${table6} | grep -Eo -e "class=\"pr_0\"[^/]*" | grep -Eo -e "wp_[^\"_]*"))
pressure6=($(echo ${table6} | grep -Eo -e "class=\"p_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))

table3=$(echo ${file} | grep -Pzo "ftab_3_content(.|\n)*ftab_1_content")
dates3=($(echo ${table3} | grep -o -e "monthDay[^\<]*" | grep -o -e "[^>]*$"))
times3=($(echo ${table3} | grep -Eo -e "\"[nd][[:digit:]]? underlineRow\">[[:digit:]]+" | grep -o -e "[^>]*$"))
temperatures3=($(echo ${table3} | grep -Eo -e "class=\"t_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))
clouds3=($(echo ${table3} | grep -Eo -e "class=\"cc_0\"[^o]*" | grep -Eo -e "c[dn][[:digit:]]" | grep -Eo -e "[[:digit:]]+"))
conditions3=($(echo ${table3} | grep -Eo -e "class=\"pr_0\"[^/]*" | grep -Eo -e "wp_[^\"_]*"))
pressure3=($(echo ${table3} | grep -Eo -e "class=\"p_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))

table1=$(echo ${file} | grep -Pzo "ftab_1_content(.|\n)*html")
dates1=($(echo ${table1} | grep -o -e "monthDay[^\<]*" | grep -o -e "[^>]*$"))
times1=($(echo ${table1} | grep -Eo -e "\"[nd][[:digit:]]? underlineRow\">[[:digit:]]+" | grep -o -e "[^>]*$"))
temperatures1=($(echo ${table1} | grep -Eo -e "class=\"t_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))
clouds1=($(echo ${table1} | grep -Eo -e "class=\"cc_0\"[^o]*" | grep -Eo -e "c[dn][[:digit:]]" | grep -Eo -e "[[:digit:]]+"))
conditions1=($(echo ${table1} | grep -Eo -e "class=\"pr_0\"[^/]*" | grep -Eo -e "wp_[^\"_]*"))
pressure1=($(echo ${table1} | grep -Eo -e "class=\"p_0\">[^/]*" | grep -Eo -e ">[-[:digit:]]+" | grep -Eo -e "[-[:digit:]]+"))

if [ ${#dates1[1]} -eq 2 ] && [ ${dates1[1]:0:1} == ${dates1[3]:0:1} ]
then
    dates1[1]=${dates1[3]}
fi
if [ ${#dates1[-1]} -eq 2 ] && [ ${dates1[-1]:0:1} == ${dates1[-3]:0:1} ]
then
    dates1[-1]=${dates1[-3]}
fi
if [ ${#dates3[1]} -eq 2 ] && [ ${dates3[1]:0:1} == ${dates3[3]:0:1} ]
then
    dates3[1]=${dates3[3]}
fi
if [ ${#dates3[-1]} -eq 2 ] && [ ${dates3[-1]:0:1} == ${dates3[-3]:0:1} ]
then
    dates3[-1]=${dates3[-3]}
fi
if [ ${#dates6[1]} -eq 2 ] && [ ${dates6[1]:0:1} == ${dates6[3]:0:1} ]
then
    dates6[1]=${dates6[3]}
fi
if [ ${#dates6[-1]} -eq 2 ] && [ ${dates6[-1]:0:1} == ${dates6[-3]:0:1} ]
then
    dates6[-1]=${dates6[-3]}
fi

if [ ${#dates3[-1]} -eq 2 ]
then
    k=1
    while [ ${#dates6[-k]} -eq 2 ]
    do
        k=$[$k+1]
    done
    if [ ${dates3[-1]:0:1} == ${dates6[-k]:0:1} ]
    then
        dates3[-1]=${dates6[-1]}
    fi
fi
if [ ${#dates1[-1]} -eq 2 ]
then
    k=1
    while [ ${#dates3[-k]} -eq 2 ]
    do
        k=$[$k+1]
    done
    if [ ${dates1[-1]:0:1} == ${dates3[-k]:0:1} ]
    then
        dates1[-1]=${dates3[-1]}
    fi
fi

i=0
j=0
k=0
while [ $j -lt ${#times1[@]} ]
do
    forecast[$k]=$(printf '%s\t%s\t%s\t%s\t%s\t%s\n' "${dates1[i]} ${dates1[i+1]}" "${times1[j]}" "${temperatures1[j]}" "${clouds1[j]}" "${pressure1[j]}" "${conditions1[j+j]} ${conditions1[j+j+1]}")
    k=$[$k+1]
    j=$[$j+1]
    if [ ! -z ${times1[j]} ] && [ ${times1[j]} -lt ${times1[j-1]} ]
    then
        i=$[$i+2]
    fi
done

i=0
j=0
while [ $j -lt ${#times3[@]} ]
do
    if [ ${dates3[i]} -gt ${dates1[-2]} ] && [ ${dates3[i+1]} == ${dates1[-1]} ]
    then
        break
    fi
    if [ ${dates3[i]} -eq ${dates1[-2]} ] && [ ${times3[j]} -gt ${times1[-1]} ]
    then
        break
    fi
    j=$[$j+1]
    if [ ! -z ${times3[j]} ] && [ ${times3[j]} -lt ${times3[j-1]} ]
    then
        i=$[$i+2]
    fi
done
while [ $j -lt ${#times3[@]} ]
do
    forecast[$k]=$(printf '%s\t%s\t%s\t%s\t%s\t%s\n' "${dates3[i]} ${dates3[i+1]}" "${times3[j]}" "${temperatures3[j]}" "${clouds3[j]}" "${pressure3[j]}" "${conditions3[j+j]} ${conditions3[j+j+1]}")
    k=$[$k+1]
    j=$[$j+1]
    if [ ! -z ${times3[j]} ] && [ ${times3[j]} -lt ${times3[j-1]} ]
    then
        i=$[$i+2]
    fi
done

i=0
j=0
while [ $j -lt ${#times6[@]} ]
do
    if [ ${dates6[i]} -gt ${dates3[-2]} ] && [ ${dates6[i+1]} == ${dates3[-1]} ]
    then
        break
    fi
    if [ ${dates6[i]} -eq ${dates3[-2]} ] && [ ${times6[j]} -gt ${times3[-1]} ]
    then
        break
    fi
    j=$[$j+1]
    if [ ! -z ${times6[j]} ] && [ ${times6[j]} -lt ${times6[j-1]} ]
    then
        i=$[$i+2]
    fi
done
while [ $j -lt ${#times6[@]} ]
do
    forecast[$k]=$(printf '%s\t%s\t%s\t%s\t%s\t%s\n' "${dates6[i]} ${dates6[i+1]}" "${times6[j]}" "${temperatures6[j]}" "${clouds6[j]}" "${pressure6[j]}" "${conditions6[j+j]} ${conditions6[j+j+1]}")
    k=$[$k+1]
    j=$[$j+1]
    if [ ! -z ${times6[j]} ] && [ ${times6[j]} -lt ${times6[j-1]} ]
    then
        i=$[$i+2]
    fi
done

echo ${name}
printf "%s\n" "${forecast[@]}"