#!/bin/bash

cd "$(dirname "$(readlink -f "$0")")"
# Test if config.cfg exists and set needed variables
if [ ! -e config.cfg ]; then echo "Missing config.cfg file. Edit and rename config.cfg.sample"; exit 1; fi
source config.cfg

function fappend {
    echo -e "$2">>$1;
}
 
function mailsend { 
    TOEMAIL="$TOEMAIL";
    FREMAIL="$FREMAIL";
    SUBJECT="[EWM] $1";
    MSGBODY1="$2"
    MSGBODY2="$3"
    TMP=`mktemp`
     
    fappend $TMP "From: $FREMAIL";
    fappend $TMP "To: $TOEMAIL";
    fappend $TMP "Reply-To: $FREMAIL";
    fappend $TMP "Subject: $SUBJECT";
    fappend $TMP "";
    fappend $TMP "$MSGBODY1";
    fappend $TMP "";
    fappend $TMP "$MSGBODY2";
    fappend $TMP "";
    cat $TMP | "$SENDMAILPATH" -t;
    rm $TMP;
}

function pingtest {
    ping -c3 -W3 -q $1
    STATUS=$(echo $?)
}

function indextest {
    wget -q -T 5 -t 2 -U $(cat monitor-user-agent.txt) -O "$CURHOST".html http://"$CURHOST"
    
    if [ -e sites/"$CURHOST".ignore ]; then
        CURIGN=$(cat sites/"$CURHOST".ignore)
    else
        CURIGN="VeRy-UnLiKeLy-StRiNg-To-MaTcH"
    fi
    
    diff -qBb -I $CURIGN sites/"$CURHOST".orig "$CURHOST".html
    STATUS=$(echo $?)

}

for ((i = 0; i < ${#NAME[*]}; i++)); do
    CURNAME=${NAME[$i]}
    CURHOST=${HOST[$i]}
    
    ## TEST PING
    pingtest $CURHOST
    if [ "$STATUS" != 0 ]; then
        mailsend "Ping error on $CURHOST" \
        "Ping was unsuccessful" \
        "Check http://$CURHOST"
    fi
    
    ## TEST FOR CHANGED INDEX
    indextest
    if [ "$STATUS" != 0 ]; then
        diff -U 0 -Bb -I $CURIGN sites/"$CURHOST".orig "$CURHOST".html > "$CURHOST".diff
        
        mailsend "Index error on $CURHOST" \
        "Index on $CURHOST differs from original index: \n\n$(cat $CURHOST.diff)" \
        "Update original index: ssh://$CURNAME"
        
        rm "$CURHOST".diff
    fi
    rm "$CURHOST".html
    
done