#!/bin/bash

#=================================================
# PACKAGE UPDATING HELPER
#=================================================

# This script is meant to be run by GitHub Actions
# The YunoHost-Apps organisation offers a template Action to run this script periodically
# Since each app is different, maintainers can adapt its contents so as to perform
# automatic actions when a new upstream release is detected.

#=================================================
# FETCHING LATEST RELEASE AND ITS ASSETS
#=================================================

# Fetching information
current_version=$(cat manifest.json | jq -j '.version|split("~")[0]')
# Some jq magic is needed, because the latest upstream release is not always the latest version (e.g. security patches for older versions)
latest_release_json=$(curl --silent "https://git.pleroma.social/api/v4/projects/2/releases" | jq -r '[.[] | select( .upcoming_release != true )][0]')
version=$(echo $latest_release_json | jq -r '.tag_name')
assets=$(echo $latest_release_json | jq -r '[ .assets.sources[].url ] | join(" ") | @sh' | tr -d "'")
release=$(echo $latest_release_json | jq -r '[ ._links.self ] | join(" ")' | tr -d "'")
description=$(echo $latest_release_json | jq -r '[ .description ] | join(" ")' | tr -d "'")
commit_id=$(echo $latest_release_json | jq -r '[ .commit.id ] | join(" ")' | tr -d "'")
pipeline_id=$(curl --silent "https://git.pleroma.social/api/v4/projects/2/pipelines?sha=$commit_id&ref=stable" | jq -r '[ .[] | .id|tostring ] | join(" ") ' | tr -d "'")

# Later down the script, we assume the version has only digits and dots
# Sometimes the release name starts with a "v", so let's filter it out.
# You may need more tweaks here if the upstream repository has different naming conventions.
if [[ ${version:0:1} == "v" || ${version:0:1} == "V" ]]; then
	version=${version:1}
fi

# Setting up the environment variables
echo "Current version: $current_version"
echo "Latest release from upstream: $version"
echo "VERSION=$version" >> $GITHUB_ENV
echo "RELEASE=$release" >> $GITHUB_ENV
echo "DESCRIPTION=$description" >> $GITHUB_ENV
# For the time being, let's assume the script will fail
echo "PROCEED=false" >> $GITHUB_ENV

# Proceed only if the retrieved version is greater than the current one
if ! dpkg --compare-versions "$current_version" "lt" "$version" ; then
	echo "::warning ::No new version available"
	exit 0
# Proceed only if a PR for this new version does not already exist
elif git ls-remote -q --exit-code --heads https://github.com/$GITHUB_REPOSITORY.git ci-auto-update-v$version ; then
	echo "::warning ::A branch already exists for this update"
	exit 0
fi

#=================================================
# UPDATE SOURCE FILES
#=================================================

# Let's loop over the available architectures
architectures=("amd64" "arm64" "arm")
for arch in ${architectures[@]}; do

	echo "Processing $arch release"

	job_url=$(curl --silent "https://git.pleroma.social/api/v4/projects/2/pipelines/$pipeline_id/jobs" | jq -r '.[] | select((.status=="success") and (.stage=="release") and (.name=="'$arch'")) | .web_url')

	if [ ! -z "$job_url" ]; then

		asset_url="$job_url/artifacts/download?file_type=archive"

		# Create the temporary directory
		tempdir="$(mktemp -d)"

		# Download sources and calculate checksum
		filename=${asset_url##*/}
		curl --silent -4 -L $asset_url -o "$tempdir/$filename"
		checksum=$(sha256sum "$tempdir/$filename" | head -c 64)

		# Delete temporary directory
		rm -rf $tempdir

		if [ $arch == "arm" ]; then
			arch="armhf"
		fi

		# Rewrite source file
		cat <<EOT > conf/$arch.src
SOURCE_URL=$asset_url
SOURCE_SUM=$checksum
SOURCE_SUM_PRG=sha256sum
SOURCE_FORMAT=zip
SOURCE_IN_SUBDIR=true
SOURCE_FILENAME=
EOT
		echo "... conf/$arch.src updated"

	else
		echo "... artifact ignored"
		echo "::warning ::Artifact for $arch was not updated"
	fi

done

#=================================================
# SPECIFIC UPDATE STEPS
#=================================================

# Any action on the app's source code can be done.
# The GitHub Action workflow takes care of committing all changes after this script ends.

#=================================================
# GENERIC FINALIZATION
#=================================================

# Replace new version in manifest
echo "$(jq -s --indent 4 ".[] | .version = \"$version~ynh1\"" manifest.json)" > manifest.json

# No need to update the README, yunohost-bot takes care of it

# The Action will proceed only if the PROCEED environment variable is set to true
echo "PROCEED=true" >> $GITHUB_ENV
exit 0