#!/bin/bash

#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping $app's systemd service..." --weight=1

ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
# ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Updating NodeJS..." --weight=1

ynh_install_nodejs --nodejs_version=$nodejs_version
ynh_use_nodejs

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Upgrading source files..." --weight=1

# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$install_dir" --full_replace=1 \
    --keep="config.yaml passkey.pem appservice-registration-irc.yaml"

chmod 750 "$install_dir"
chmod -R o-rwx "$install_dir"
chown -R "$app:www-data" "$install_dir"

#=================================================
# Build
#=================================================
ynh_script_progression --message="Upgrading the app..." --weight=1

(
    cd "$install_dir"
    ynh_exec_as "$app" "$ynh_node_load_PATH" "$ynh_npm" i
)

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

configured_servers=$(python3 -c "import yaml
with open('$install_dir/config.yaml') as c: c = yaml.load(c, Loader=yaml.SafeLoader)
print(yaml.dump(c['ircService']['servers']))")

### Same as during install

ynh_add_config --template="config.yaml" --destination="$install_dir/config.yaml"

# Try to recover the previously configured IRC servers.
python3 -c "import yaml
with open('$install_dir/config.yaml') as c: c = yaml.load(c, Loader=yaml.SafeLoader)
servers = yaml.safe_load('''$configured_servers''')
c['ircService']['servers'] = servers
print(yaml.dump(c))" > "$install_dir/config.yaml.temp"
mv "$install_dir/config.yaml.temp" "$install_dir/config.yaml"

chmod 400 "$install_dir/config.yaml"
chown "$app:$app" "$install_dir/config.yaml"

#=================================================
# REGISTER SYNAPSE APP-SERVICE
#=================================================

ynh_backup_if_checksum_is_different --file="$install_dir/appservice-registration-irc.yaml"

__ynh_register_matrix_app_service

#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config
yunohost service add "$app" --description="$app daemon for bridging IRC and Matrix messages." --log="/var/log/$app/$app.log"

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --specific_user "$app/$app"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting $app's systemd service..." --weight=1

ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --last