#!/usr/bin/env bash

# All executed commands are printed to stdout
set -x

# Redirect stdout (and stderr to stdout) to a file
exec 1>/var/log/updater/gitea-updater/gitea-"$(date +%F)".log 2>&1

# Abort on nonzero exit status
set -o errexit

# Abort on unbound variable
set -o nounset

# Don't hide errors within pipes
set -o pipefail

# set your API key here
key=

# set your chat id here
chat_id=

function send_message() {
  if ! [ $# -eq 0 ]; then
    curl --silent --show-error --fail --request POST "https://api.telegram.org/$key/sendMessage" --data chat_id="$chat_id" --data text="$1" --output /dev/null
  else
    echo "No argument supplied, please specify the message to send"
    exit 1
  fi
}

function update_gitea() {
  systemctl stop gitea.service

  # Download the latest version
  curl --location --output /usr/local/bin/gitea --silent --show-error --fail --request GET "https://dl.gitea.io/gitea/$1/gitea-$1-linux-amd64"

  # Set the correct permissions
  chmod +x /usr/local/bin/gitea
  /sbin/restorecon -v /usr/local/bin/gitea
  /sbin/restorecon -v /var/lib/gitea/log/gitea.log

  if ! systemctl start gitea.service; then
    send_message "[Gitea] - Gitea service did not start correctly. Please log in as soon as possible and see what went wrong"
    exit 1
  fi

  send_message "[Gitea] - Gitea has just been updated"
}

# Retrieve local release
local_release=$(/usr/local/bin/gitea --version | awk '{print $3}')

# Retrieve the latest release
latest_release=$(curl --silent --show-error --fail --request GET "https://api.github.com/repos/go-gitea/gitea/releases/latest" | grep '"tag_name":' | sed --regexp-extended 's/.*"([^"]+)".*/\1/' | cut --characters=2-)

# Compare these two versions
if ! [ "$latest_release" == "$local_release" ]; then
  send_message "[Gitea] - Gitea is not up to date (https://github.com/go-gitea/gitea/releases/tag/v$latest_release)"
  update_gitea "$latest_release"
fi

send_message "[Gitea] - Gitea is up to date"