configure

#!/bin/sh

# Exit script on errors
set -ue

# Read arguments
show_help=
for arg in "$@"; do
	case "$arg" in
		"-h"|--help)
			show_help=stdin
			;;
		*)
			>&2 echo "Unrecognized argument: $arg"
			show_help=stderr
			break
			;;
	esac
done

# Display help if necessary
help() {
	echo "Usage: $(basename "$0") [options]"
	echo "  -h, --help                  print this message and exit"
	echo
	echo "Report bugs at https://github.com/alyssais/humans/issues"
	exit
}
[ "$show_help" = "stdin" ] && help
[ "$show_help" = "stderr" ] && >&2 help

# Declare config variables in case config.sh doesn't
owner=
repo=
file=
name=
email=
message=
access_token=

[ -f config.sh ] && source config.sh

check() {
	$@ > /dev/null 2>&1;
	local ret="$?"
	if [ "$ret" = 0 ]; then
		echo "\033[32;32mok\033[0m" # ok
	else
		echo "\033[31;31merror\033[0m"
	fi
	return $ret
}

while :; do
	while :; do
		printf "GitHub repository owner: "
		[ -n "$owner" ] && printf "($owner) "
		read -r i_owner
		[ -z "$i_owner" ] && i_owner="$owner"
		[ -n "$i_owner" ] && break
	done

	while :; do
		printf "GitHub repository name: "
		[ -n "$repo" ] && printf "($repo) "
		read -r i_repo
		[ -z "$i_repo" ] && i_repo="$repo"
		[ -n "$i_repo" ] && break
	done

	# TODO: check no output
	printf "checking $i_owner/$i_repo exists... "
	check curl -Isf "https://api.github.com/repos/$i_owner/$i_repo" && break

	# Invalid repository specified
	read -rp "Is $i_owner/$i_repo definitely correct? (y/N) " yn
	if [ "$yn" = y ] || [ "$yn" = Y ]; then

		owner="$i_owner"
		repo="$i_repo"

		read -rp "Is $i_owner/$i_repo a private repository? (y/N) " yn
		[ "$yn" != y ] && [ "$yn" != Y ] && break

		if [ -n "$access_token" ]; then
			echo "An API token is already set:"
			echo "  $access_token"
			read -rp "Should this token be replaced? (y/N) " yn
			[ "$yn" != y ] && [ "$yn" != Y ] && break
		fi

		# Repository is private
		while :; do
			echo "humans needs to be authorized to access $i_owner/$i_repo."
			echo "Please create a token with 'repo' permissions here:"
			echo "  \033[4;34mhttps://github.com/settings/tokens/new\033[0m"
			echo "Alternatively, hit return without entering anything to have humans" \
				"create one for you."
			printf "GitHub API token: "
			read -r i_access_token
			[ -n "$i_access_token" ] && break

			# Generate an API token
			read -rp "Your GitHub username: ($i_owner) " i_auth_user
			read -rsp "Your GitHub password: " i_auth_password
			echo # output blank line after password

			[ "$i_auth_user" ] || i_auth_user="$i_owner"

			github() {
				curl -s https://api.github.com/$1 \
					-u "$i_auth_user:$i_auth_password" \
					-H "Content-Type: application/json" \
					-H "Accept: application/vnd.github.v3+json" \
					$(shift 1; echo $@)
			}
			response=$(github authorizations -X POST -d @- <<-JSON
				{
					"scopes": [
						"repo"
					],
					"note": "humans@$(hostname)$(pwd)",
					"note_url": "https://github.com/alyssais/humans"
				}
				JSON
			)
			if echo "$response" | grep '"token"'; then
				echo "$response" | jq -r .token | read i_access_token
			else
				printf "\033[31;31mError: \033[0m"
				echo "$response" | jq -r .message
				echo "You'll need to create a GitHub API token manually."
			fi

			[ -n "$i_access_token" ] && break
		done

    [ -n "$i_access_token" ] && access_token="$i_access_token"

		break
	fi
done

[ -z "$file" ] && file=CONTRIBUTORS
printf "Contributors file path: ($file) "
read i_file
[ -n "$i_file" ] && file="$i_file"

[ -z "$name" ] && name="A Friendly Bot"
printf "Bot name: ($name) "
read i_name
[ -n "$i_name" ] && name="$i_name"

[ -z "$email" ] &&
	email="$(echo "$name" | sed "s/ /./g" | tr '[:upper:]' '[:lower:]')@example"
printf "Bot email: ($email) "
read i_email
[ -n "$i_email" ] && email="$i_email"

[ -z "$message" ] && message="Update $file"
printf "Commit message: ($message) "
read i_message
[ -n "$i_message" ] && message="$i_message"

printf "owner=%q\n"        "$owner"         > config.sh
printf "repo=%q\n"         "$repo"         >> config.sh
printf "file=%q\n"         "$file"         >> config.sh
printf "name=%q\n"         "$name"         >> config.sh
printf "email=%q\n"        "$email"        >> config.sh
printf "message=%q\n"      "$message"      >> config.sh
printf "access_token=%q\n" "$access_token" >> config.sh

echo "Successfully wrote configuration to config.sh"