register.sh

SELF="${0}"

function green () {
    START="\033[0;32m"
    END="\033[0m"
    echo -e "${START}${1}${END}"
}

USAGE=""
declare -gA USAGE_REGISTRY
function register () {
    ADDITION=""
    CMDNAME=$1
    CMDUSAGE=$2
    CMDDESC=$3
    COUNT=0
    shift && shift && shift
    SUBNAME=""
    SUBUSAGE=""
    SUBDESC=""
    ADDITION+="$(green $CMDNAME) $CMDUSAGE\\n"
    if [ -n "$CMDDESC" ]; then
        ADDITION+="  "$CMDDESC"\\n"
    fi
    for var in "$@"
    do
        if [ $(( COUNT % 3 )) -eq 0 ]; then
            SUBNAME=$var
        fi
        if [ $(( COUNT % 3 )) -eq 1 ]; then
            SUBUSAGE=$var
        fi
        if [ $(( COUNT % 3 )) -eq 2 ]; then
            SUBDESC=$var
            BUSAGE="$(green $SUBNAME) $SUBUSAGE"
            ADDITION="    $BUSAGE\\n      $SUBDESC\\n"
        fi
        COUNT=$((COUNT + 1))
    done
    USAGE_REGISTRY[$CMDNAME]=$ADDITION
    USAGE+=$ADDITION
}
register "register" "<CMD> <ARGS> <DESC> ...[<SUBCMD> <SUBARGS> <SUBDESC>]" "registers a command"

function edit () {
    if [ "$1" = "file" ]; then
        code $SELF
    else 
        code $(dirname $SELF)
    fi
}
register "edit" "[file]" "opens scripts dir in vscode"

function reload () {
    source ~/workspace/scripts/main.sh
}
register "reload" "" "reloads scripts"

function usage () {
    if (help usage $@) return;
    echo $USAGE
}
register "usage" "" "shows scripts usage"

function flag () {
    OPTIONS=()
    ARGS=()
    PAST=0
    for ARG in "$@"; do
        if [ "$ARG" = "--" ]; then
            PAST=1
        elif  [ "$PAST" -eq 1 ]; then
            ARGS+=("$ARG")
            if [[ "$ARG" = --* ]]; then
                ARGS+=("$ARG")
            elif [[ "$ARG" = -* ]]; then
                LETTERS=($(echo "$ARG" | grep -o .))
                for LETTER in "$LETTERS[@]"; do
                    ARGS+=("-$LETTER")
                done
            fi
        else 
            OPTIONS+=("$ARG")
            if [[ "$ARG" = --* ]]; then
                DEDASHED=$(echo "$ARG" | sed 's/-//g')
                OPTIONS+=("--$DEDASHED")
            fi
        fi
    done
    FOUND=1

    for ARG in "$ARGS[@]"; do
        for OPTION in "$OPTIONS[@]"; do
            if [ "$ARG" = "$OPTION" ]; then
                FOUND=0
            fi
        done
    done

    return FOUND
}
register "flag" "...<MATCHES> -- ...<ARGS>" "checks if flag exists in args"

function help () {
    CMD=$1
    shift
    if (flag --help -help --h -h -- $@); then
        echo $USAGE_REGISTRY[$CMD];
        return 0
    fi
    return 1
}
HELP_FLAG="[--help, -h]"
register "help" "<CMD> [--help] [-help] [--h] [-h]" "returns true if help flag is set"

function force () {
    return $(flag --force -f -- "$@")
}
FORCE_FLAG="[--force, -f]"
register "force" "$FORCE_FLAG" "returns true if --force flag is set"

function verbose () {
    return $(flag --verbose -v -- "$@")
}
VERBOSE_FLAG="[--verbose, -v]"
register "verbose" "$VERBOSE_FLAG" "returns true if --verbose flag is set"

function dry-run () {
    return $(flag --dry-run -d -- "$@")
}
DRY_FLAG="[--dry-run, -d]"
register "dry-run" "$DRY_FLAG" "returns true if --dry-run flag is set"

function example () {
    if (help example $@) return;
    if (force $@); then
        echo "yep forced"
    fi
    if (verbose $@); then
        echo "yep verbose"
    fi
    if (dry-run $@); then
        echo "yep dry"
    fi
    echo "more stuff"
}
register "example" "<CMD> $DRY_FLAG $FORCE_FLAG $VERBOSE_FLAG $HELP_FLAG" "returns true if help flag is set"