#!/bin/bash

#usage: getCal [link] [outDir]

maxStep=1000

t=$(date +%s)
if [[ ! -z $2 ]]; then
  outDir="$2"
else
  outDir=$(pwd)
fi
if [[ ! -d $outDir ]]; then mkdir -p $outDir; fi
cd $outDir

wget -O .$t.linkPage "$1"
n=$(cat .$t.linkPage|grep "[0-9][0-9] of"|sed -n 1p|sed 's/<\/span>.*//'|awk '{print $NF}')
nn=0
rootLnk=$(echo $1|awk -F '/' 'NF{NF-=1};1'|sed 's/ /\//g')
while [[ $nn -lt $n ]]
do
  strt=$(echo "1+$nn"|bc)
  if [[ $(echo "$stp+$maxStep"|bc) -ge $n ]]; then
    step=$(echo "$n-$nn"|bc)
    nn=$n
  else
    step=$maxStep
    nn=$(echo "$maxStep+$nn"|bc)
  fi

  list=$(cat .$t.linkPage|grep ">Next<"|sed -n 1p|sed 's/>Next<.*//;s/.*href="//'|sed "s/start=26\"/start=$(echo $strt)/;s/num=25/num=$(echo $step)/")
  wget -T 0 -O .$t.linkPage2 "$rootLnk$list"

  cat .$t.linkPage2|grep '"button"><a'|sed 's/.*href="//;s/">.*//' > .$t.links
  while read link
  do
    wget -T 2000 $(echo $rootLnk)$(echo $link)
  done < .$t.links
  rm -f .$t.linkPage2
  rm -f .$t.links
  sleep 1
done
rm -f ./.$t.*