#!/bin/bash
# info: list user log
# options: USER [FORMAT]
#
# The function of obtaining the list of 100 last users commands.


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument definition
user=$1
format=${2-shell}
limit=${3-300}

# Includes
source $VESTA/func/main.sh

# JSON list function
json_list() {
    IFS=$'\n'
    i=1
    objects=$(echo "$logs" |wc -l)
    echo "{"
    for str in $logs; do
        ID=$(echo "$str" |cut -f 2 -d \')
        DATE=$(echo "$str" |cut -f 4 -d \')
        TIME=$(echo "$str" |cut -f 6 -d \')
        CMD=$(echo "$str" |cut -f 8 -d \')
        CMD=${CMD//\"/\\\"}
        echo -n '    "'$ID'": {
        "CMD": "'$CMD'",
        "UNDO": "'$UNDO'",
        "TIME": "'$TIME'",
        "DATE": "'$DATE'"
    }'
        if [ "$limit" -gt 0 ] && [ "$i" = "$limit" ]; then
            break;
        fi
        if [ "$i" -lt "$objects" ]; then
            echo ','
        else
            echo
        fi
        ((i++))
    done
    echo '}'
}

shell_list() {
    IFS=$'\n'
    echo "DATE~TIME~CMD"
    echo "----~----~---"
    for str in $logs; do
        DATE=$(echo "$str" |cut -f 4 -d \')
        TIME=$(echo "$str" |cut -f 6 -d \')
        CMD=$(echo "$str" |cut -f 8 -d \')
        echo "$DATE~$TIME~$CMD"
    done
}

# PLAIN list function
plain_list() {
    IFS=$'\n'
    for str in $logs; do
        DATE=$(echo "$str" |cut -f 4 -d \')
        TIME=$(echo "$str" |cut -f 6 -d \')
        CMD=$(echo "$str" |cut -f 8 -d \')
        echo -e "$ID\t$CMD\t$UNDO\t$TIME\t$DATE"
    done
}

# CSV list function
csv_list() {
    IFS=$'\n'
    echo "ID,CMD,UNDO,TIME,DATE"
    for str in $logs; do
        DATE=$(echo "$str" |cut -f 4 -d \')
        TIME=$(echo "$str" |cut -f 6 -d \')
        CMD=$(echo "$str" |cut -f 8 -d \')
        echo "$ID,\"$CMD\",\"$UNDO\",$TIME,$DATE"
    done
}

#----------------------------------------------------------#
#                    Verifications                         #
#----------------------------------------------------------#

check_args '1' "$#" 'USER [FORMAT] [LIMIT]'
is_format_valid 'user'
is_object_valid 'user' 'USER' "$user"


#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Parsing history log
logs=$(tail -n $limit $USER_DATA/history.log | tac)

case $format in
    json)   json_list ;;
    plain)  plain_list ;;
    csv)    csv_list ;;
    shell)  shell_list |column -t -s '~';;
esac


#----------------------------------------------------------#
#                       Vesta                              #
#----------------------------------------------------------#

exit