ircmsg.sh

#!/usr/bin/env bash
# shellcheck disable=SC2039

# PARSE an irc message into a $PREFIX and array of $PARAMS and a $TAIL
# the $TAIL is also the last element of the $PARAMS array
parse_irc_msg() {
    __MSG=$1

    clean_irc_msg
    for (( __i=0; __i<${#__MSG}; __i++ )); do
        __CHAR="${__MSG:$__i:1}"

        # IF the first char is a : there is a prefix
        if [ $__i = 0 ] && [ "$__CHAR" = ":" ]; then
            PREFIX="${__MSG:$((__i + 1))}"
            PREFIX="${PREFIX%% *}"
            __i=$((__i + ${#PREFIX} + 1))
        # IF there is any other : in the message
        # it is the tail and after that end of message
        elif [ "$__CHAR" = ":" ]; then
            TAIL="${__MSG:$((__i + 1))}"
            PARAMS+=("$TAIL")
            break
        # Anything else is a normal parameter
        # and gets parsed without any spaces
        else
            __PARAM="${__MSG:$__i}"
            __PARAM="${__PARAM%% *}"
            __PARAM="${__PARAM##*( )}"

            # IF this is the first string after a space
            # it is the command
            if [ -z "$CMD" ]; then
                CMD="$__PARAM"
            else
                PARAMS+=("$__PARAM")
            fi

            __i=$((__i + ${#__PARAM}))
        fi

        unset __PARAM
        unset __CHAR
    done

    unset __i
    unset __MSG
}

clean_irc_msg() {
    unset PREFIX
    unset CMD
    unset PARAMS
    unset TAIL
}