Convert ZNC logs to WeeChat logs (in French)

znc2weechat.bash

#!/usr/bin/env bash

channel=$1

while read -rd ' ' time && read -rd ' ' event && IFS= read -r message; do
    time=${time#[} time=${time%]}
    case $event in
        '***')
            if [[ $message =~ ^(.*)' is now known as '(.*)$ ]]; then
                event='*'
                message="${BASH_REMATCH[1]} est maintenant connu sous le nom ${BASH_REMATCH[2]}"
            elif [[ $message =~ ^(.*)' was kicked by '(.*)' '(.*)$ ]]; then
                event='←'
                message="${BASH_REMATCH[2]} a éjecté ${BASH_REMATCH[1]} ${BASH_REMATCH[3]}"
            elif [[ $message =~ ^(.*)' sets mode: '(.*)' '*$ ]]; then
                event='*'
                message="Mode $channel [${BASH_REMATCH[2]}]"
                [[ ${BASH_REMATCH[1]} == Server ]] || message+=" par ${BASH_REMATCH[1]}"
            elif [[ $message =~ ^(.*)' changes topic to '\'(.*)\'$ ]]; then
                event='*'
                message="${BASH_REMATCH[1]} a changé le titre pour $channel en \"${BASH_REMATCH[2]}\""
            else
                continue
            fi
            ;;
        '*')
            event=' *'
            ;;
        '<'*'>')
            event=${event#<}
            event=${event%>}
            ;;
        -*-)
            sender=${event#-}
            sender=${sender%-}
            event='*'
            message="$sender: $message"
            ;;
        *)
            continue
            ;;
    esac
    printf '%s\t%s\t%s\n' "$time" "$event" "$message"
done