#!/bin/bash
# By LoathingKernel
# Needs sudo without interactive password for the dmesg command and clears dmesg.
# Keeps a log of dmesg with conky color information, timestamps and text wrapping.
# Colors can be easily cleared with sed.
# At same point will be rewritten with diff

LOGFILE=$HOME/.conky/dmesg.log
LOGNEWLINES=$(sudo dmesg -c | sed 's/.\{80\} /&\n\t/g')

## Colors
#RED="${color #EF2929}"
#ORANGE="${color #FCAF3E}"
#YELLOW="${color #FCE94F}"
#GREEN="${color #8AE234}"
#BLUE="${color #729FCF}"
#PURPLE="${color #AD7FA8}"

if [ -n "$LOGNEWLINES" ]
    then

    ## Read the date
    TIMESTAMP=$(date +"%d-%m-%Y %T")

    ## Read the log
    if [ -f $HOME/.conky/dmesg.log ]
            then
            LOGLASTLINE=$(cat $HOME/.conky/dmesg.log | tail -1)
    else
            LOGLASTLINE=""
    fi

    ## Find the color of the last line and append the new lines
    if [ $(echo "$LOGLASTLINE" | grep -c "EF2929") -eq 1 ]
        then
        echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #FCAF3E} /' >> $HOME/.conky/dmesg.log

    elif [ $(echo "$LOGLASTLINE" | grep -c "FCAF3E") -eq 1 ]
            then
            echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #FCE94F} /' >> $HOME/.conky/dmesg.log

    elif [ $(echo "$LOGLASTLINE" | grep -c "FCE94F") -eq 1 ]
            then
            echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #8AE234} /' >> $HOME/.conky/dmesg.log

    elif [ $(echo "$LOGLASTLINE" | grep -c "8AE234") -eq 1 ]
            then
            echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #729FCF} /' >> $HOME/.conky/dmesg.log

    elif [ $(echo "$LOGLASTLINE" | grep -c "729FCF") -eq 1 ]
            then
            echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #AD7FA8} /' >> $HOME/.conky/dmesg.log

        elif [ $(echo "$LOGLASTLINE" | grep -c "AD7FA8") -eq 1 ]
                then
                echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #EF2929} /' >> $HOME/.conky/dmesg.log

    else
        echo "$LOGNEWLINES" | sed "1i\Timestamp: \\${TIMESTAMP}" | sed 's/^/${color #EF2929}/' >> $HOME/.conky/dmesg.log
    fi

fi

if [ -f $HOME/.conky/dmesg.log ]
        then
        tail -40 $HOME/.conky/dmesg.log
fi