#!/bin/bash

LOGPATH=slave-status.log

/usr/local/bin/redis-cli INFO | egrep 'slave|master_repl' > $LOGPATH
DATE=$(date);
MASTERDATA=();
SLAVEINTS=();
SLAVEIPS=();

MASTERTEMPLATE="{\"Date\":\"%s\",\"SlaveCount\":%s,\"Master\":%s,\"Slaves\":{"
SLAVETEMPLATE="%s:{\"ip\": \"%s\", \"state\": %s, \"diff\": %s}%s"
ENDTEMPLATE="}"

while read -r line
do
        if [[ $line =~ .*connected_slaves.* ]]; then
                set -- $(echo $line | awk -F'[^0-9]*' '{print $2, $0}')
                MASTERDATA+=($1)
        elif [[ $line =~ .*master.* ]]; then
                set -- $(echo $line | awk -F'[^0-9]*' '{print $2, $0}')
                MASTERDATA+=($1)
        else
                set -- $(echo $line | awk -F'[^0-9]*' '{print $8, $0}')
                SLAVEINTS+=($1)
                set -- $(echo $line | awk -F'[^0-9.:]+*' '{print $3, $4}')
                SLAVEIPS+=("$1:$2")
        fi
done < $LOGPATH

printf "$STARTTEMPLATE$MASTERTEMPLATE" "$DATE" ${MASTERDATA[@]}
d=0

SLAVETEXT=()
for i in "${SLAVEINTS[@]}"
do
        printf "$SLAVETEMPLATE" "\"Slave$d\"" ${SLAVEIPS[$d]} $i $(expr ${MASTERDATA[1]} - $i) $([ "${#SLAVEINTS[@]}" -ne $(expr $d + 1) ] && printf "," || printf "")
        let d++
done

printf $ENDTEMPLATE$ENDTEMPLATE