#!/bin/bash
# Common utility functions shared across multiple files.

RESET="\033[0m"
GREEN="\033[1;32m"
YELLOW="\033[1;33m"
RED="\033[1;31m"

check_dependencies() {
	# Usage: check_dependencies "7z" "unrar" "curl" ...
	local dependencies=()
	local dependency

	for dependency in "$@"; do
		if ! command -v "$dependency" >/dev/null; then
			dependencies+=("$dependency")
		fi
	done

	if (( "${#dependencies[@]}" > 0 )); then
		log "ERROR" "Missing dependencies" "${dependencies[@]}"
		return 1
	fi
}

log() {
	# Usage: log "NOTICE|WARN|ERROR" "this is a log message" ...
	local caller="${0##*/}"
	local level="$1"; shift
	local color

	case "$level" in
		NOTICE) color="$GREEN" ;;
		WARN) color="$YELLOW" ;;
		ERROR) color="$RED" ;;

		# No color for these levels.
		INFO) color="" ;;
		*) color="" ;;
	esac

	echo -e "$caller: ${color}[$level]: $*${RESET}" >&2
}