#!/bin/sh

# Color functions

#################

RED='\033[0;31m'

GREEN='\033[0;32m'

BLUE='\033[1;34m'

YELLOW='\033[1;33m'

NO_COLOR='\033[0m'

color() { COLOR=$1; TEXT=$2; echo "${COLOR}${TEXT}${NO_COLOR}"; }

error() { color "${RED}" "${1}"; }

success() { color "${GREEN}" "${1}"; }

info() { color "${BLUE}" "${1}"; }

warn() { color "${YELLOW}" "${1}"; }

#################

# Utility functions

###################

is_empty() {

VALUE=$1

VARIABLE_NAME=$2

([[ -z "${VALUE}" ]] && echo "$(warn "${VARIABLE_NAME}") $(error 'is required.')" && return 1) || return 0

}

is_contains() {

local ARRAY=("$1")

local ELEMENT=$2

[[ " ${ARRAY[@]} " =~ " ${ELEMENT} " ]]

}

has_substr() {

local STRING=$1

local SUBSTRING=$2

[[ "${STRING}" == *"${SUBSTRING}"* ]]

}

ensure_file_exists() {

FILE=$1; [[ ! -f "${FILE}" ]] && (info "Creating empty file ${FILE}" && touch "${FILE}")

}

ensure_dir_exists() {

DIR=$1; [[ ! -d "${DIR}" ]] && (info "Creating empty directory ${DIR}" && mkdir -p "${DIR}")

}

modify_oneline_config() {

CONFIG=$1

CONFIG_FILE=$2

grep -qFx "$CONFIG" "$CONFIG_FILE" || echo "$CONFIG" >> "$CONFIG_FILE"

}

modify_multiline_config() {

local START_TAG=$1

local END_TAG=$2

local CONFIG=$3

local CONFIG_FILE=$4

if grep -q -e "${START_TAG}" -e "${END_TAG}" "${CONFIG_FILE}"; then

local TEMP_FILE=$(mktemp)

printf "%s\n" "$CONFIG" > "$TEMP_FILE"

sed -i '' -e "/${START_TAG}/,/${END_TAG}/{/${START_TAG}/{p; r ${TEMP_FILE}

d;};/${END_TAG}/{p;d;};d;}" "${CONFIG_FILE}"

rm "${TEMP_FILE}"

else

cat <<EOF >> "${CONFIG_FILE}"

${START_TAG}

${CONFIG}

${END_TAG}

EOF

fi

}

###################