#!/bin/bash
####################################################################################
# reviewscript
# a simple script to push reviews to codestriker from an svn checkout
# (author line redacted by author)
####################################################################################
CONFIG_FILE=${HOME}/.review_config	# location of config file
DOMAIN="redacted"			# e-mail domain
HOST="redacted"				# codestriker host
PATH="/codestriker/"			# codestriker path
REPO_BASE_MATCH="srv/svn-repository/"	# part of svn path, ending at the repo base
####################################################################################
write_user_config()
{
	echo "USER_EMAIL=\"${USER_EMAIL}\"" > ${CONFIG_FILE}
}
add_domain_if_none()
{
	if echo "$1" | grep '@' > /dev/null 2>&1
	then
		echo -n "$1"
	else
		echo -n "$1@$2"
	fi
}
read_line_with_default()
{
	read -p "$1 [$2]:" -e output
	if [ "x$output" = "x" ]
	then
		output="$2"
	fi
	echo -n "$output"
}
read_line_nonblank()
{
	while true
	do
		read -p "$1:" -e output
		if [ ! "x$output" = "x" ]
		then
			break
		fi
	done
	echo -n "$output"
}
read_user_config() {
	. ${CONFIG_FILE} 2>/dev/null
	if [ "x${USER_EMAIL}" = "x" ]
	then
		email="$(read_line_with_default 'e-mail address' "$(whoami)")"
		USER_EMAIL="$(add_domain_if_none "$email" "$DOMAIN")"
		write_user_config
	fi
}
do_svn_stat() {
	if svn info > /dev/null 2>&1
	then
		STAT="$(svn stat)"
		UNCOM="$(echo -n "$INFO" | grep '^?')"
		if [ $(echo -n "$UNCOM" | wc -l) -ne 0 ]
		then
			echo "$UNCOM"
			echo "---"
			echo "WARNING - some changed files are not ignored or added, are you sure you want to continue? (^C to cancel)"
			read pause
		fi
	else
		echo "Sorry, you have to post a review from an SVN working copy"
		exit 1
	fi
}
read_project_id()
{
	PROJECTS="$(wget http://${HOST}${PATH}?action=list_projects -q -O- | grep projectid | sed -e 's/^.*projectid=\(.*\)">\(.*\)<.*/\1:\2/')"
	echo -e 'ID\tNAME'
	SAVEIFS="$IFS"
	IFS=$'\012'
	for item in $PROJECTS
	do
		ID="$(echo "$item" | cut -d ':' -f 1)"
		NAME="$(echo "$item" | cut -d ':' -f 2-)"
		echo -e "$ID\\t$NAME"
	done
	while true
	do
		id=$(read_line_nonblank 'Project ID')
		name=""
		for item in $PROJECTS
		do
			ID="$(echo $item | cut -d ':' -f 1)"
			NAME="$(echo $item | cut -d ':' -f 2-)"
			if [ "${ID}" -eq "${id}" ]
			then
				id="${ID}"
				name="${NAME}"
				break
			fi
		done
		if [ ! "x$name" = "x" ]
		then
			break
		fi
		echo "Error, Invalid ID"
	done
	IFS="$SAVEIFS"
	PROJECT_ID="$id"
	PROJECT_NAME="$name"
}
read_review_info()
{
	echo "Almost ready to commit review"
	echo "--"
	read_project_id
	REVIEW_TITLE="$(read_line_nonblank 'Review Title (must not be blank)')"
	reviewers="$(read_line_nonblank 'Reviewers (must not be blank)')"
	REVIEWERS="$(add_domain_if_none "$reviewers" "$DOMAIN")"
	BUGLIST="$(read_line_with_default 'Bugs closed (comma-separated, may be blank)' '')"
	CCLIST="$(read_line_with_default 'CC list (may be blank)' '')"
}
get_diff()
{
	URL="$(svn info | grep 'URL:' | sed -e "s|^.*${REPO_BASE_MATCH}\(.*\)$|\1|")" 
	DIFF="$(svn diff --non-interactive | sed -e "s|^Index: \(.*\)$|Index: ${URL}\1|" -e "s|^+++ \(.*\)$|+++ ${URL}\1|" -e "s|^--- \(.*\)$|--- ${URL}\1|")"
}
show_review_preview()
{
	(
		echo "Project:${PROJECT_NAME} (${PROJECT_ID})"
		echo "From:${USER_EMAIL}"
		echo "To:${REVIEWERS}"
		echo "CC:${CCLIST}"
		echo "Subject:${REVIEW_TITLE}"
		echo "Closes Bugs:${BUGLIST}"
		echo "===="
		echo "${INFO}"
		echo "===="
		echo "${DIFF}"
	) | less
	echo "If you are OK with this review, please hit enter, otherwise press ^C."
	read confirm
}
write_line()
{
	echo '--F00BAR'
	echo "Content-Disposition: form-data; name=\"${1}\""
	echo
	echo "${2}"
}
post_review()
{
	#this is where it gets tricky
	#shouldn't be too hard
	OUTPUT="$( (
		write_line action submit_new_topic
		write_line topic_title "${REVIEW_TITLE}"
		write_line topic_description "fill me out"
		write_line projectid "${PROJECT_ID}"
		write_line bug_ids "${BUGLIST}"
		write_line email "${USER_EMAIL}"
		write_line reviewers "${REVIEWERS}"
		write_line cc "${CCLIST}"
		echo '--F00BAR'
		echo 'Content-Disposition: form-data; name="topic_file"; filename="nofilename.tmp"'
		echo 'Content-Type: text/plain'
		echo 'Content-Transfer-Encoding: binary'
		echo
		echo "${DIFF}"
		echo '--F00BAR--'
	) | sed -e 's/$/\r/g')"
	let SIZE="$(echo -n "${OUTPUT}" | wc -c)"
	HEADERS="$( (
		echo "POST ${PATH} HTTP/1.0"
		echo "Content-Type: multipart/form-data; boundary=F00BAR"
		echo "Content-Length: ${SIZE}"
	) | sed -e 's/$/\r/g' )"
	(
		echo -n -e "${HEADERS}\n"
		echo -n -e '\r\n'
		echo -n "${OUTPUT}"
	) | nc ${HOST} 80
}
main() {
	read_user_config
	do_svn_stat
	read_review_info
	get_diff
	show_review_preview
	FEEDBACK=$(post_review)
	if echo "$FEEDBACK" | grep 'class="feedback"' > /dev/null 2>&1
	then
		echo "ERROR"
		echo "$FEEDBACK" | grep 'class="feedback"' | sed -e 's/<BR>/\n/g' -e 's/.*feedback">\(.*\)<.*/\1/' | grep -v 'For security reasons'
	else
		echo "REVIEW POSTED"
		echo "$FEEDBACK" | grep 'URL' | sed -e 's/.*">\(.*\)<.*/\1/'
	fi
}
main