#!/bin/bash

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

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

# Get authentication backend and set as lowercase
#auth_backend=${YNH_ACTION_IS_INTERNAL_USERS,,}
# Get "is_internal_users" and set as lowercase
is_internal_users=${YNH_ACTION_IS_INTERNAL_USERS,,}

# Get the full name of the app, Example: strut__3
app=$YNH_APP_INSTANCE_NAME

admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)

auth_backend_old=$(ynh_app_setting_get $app auth_backend)
is_internal_users_old=$(ynh_app_setting_get $app is_internal_users)

#=================================================
# CHECK IF ARGUMENTS AND REQUIREMENTS ARE CORRECT
#=================================================

#=================================================
# CHECK IF AN ACTION HAS TO BE DONE
#=================================================

if [ $is_internal_users -eq $is_internal_users_old ]
then
    ynh_die "is_internal_users is already set as $is_internal_users." 0
fi

# Ensure that app is public
if [ $is_public -eq 0 ]; then
    ynh_die "Wiki must be public if you want your people to be able to reach it. Run 'public_private' and come back here" 1
fi

# Plugin "authchained" needs to be installed for this script to run
if [ ! -d $final_path/lib/plugins/authchained ]; then
    ynh_die "Plugin 'authchained' is not installed and must be installed beforehand." 1
fi

### automatic installation of "authchained" plugin
### FIXME plugin installed this way does not work. Had to reinstall from "admin panel"
# Install "authchained" plugin. Allows to use multiple users backend storage : LDAP + internal DokuWiki users
# See https://www.dokuwiki.org/plugin:authchained?s[]=chained

#sudo wget -nv --quiet "https://github.com/splitbrain/dokuwiki-plugin-${name_plugin}/zipball/master" -O "${name_plugin}.zip" -o /dev/null || true
#plugin_archive=dokuwiki-plugin-authchained.zip
#wget -nv --quiet 'https://github.com/rztuc/dokuwiki-plugin-authchained/archive/master.zip' -O "$plugin_archive" -o /dev/null || true
#
## if "file is not zero size"
#if [ -s "$plugin_archive" ]; then
#        # path "authchained" is hardcoded and a better way should be to use the "base" field from the plugin archive
#        # See https://www.dokuwiki.org/devel:plugin_info
#        mkdir $final_path/lib/plugins/authchained
#
#       # Extract plugin files strayed to the local plugin directory
#        # Assume that the plugin name will not change in the futur
#        #
#        # unzip options
#        #   -j junk paths (do not make directories)
#        #   -d extract files into exdir
#        unzip -j -d $final_path/lib/plugins/authchained "$plugin_archive"
#
#        # Set filesystem rights for new plugin
#        chown -R $app:root $final_path/lib/plugins/authchained
#fi

#=================================================
# SPECIFIC ACTION
#=================================================

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different "$final_path/conf/local.protected.php"

# Always overwrite local file with the one from package.
cp conf/local.protected.php $final_path/conf

if [ $is_internal_users -eq 1 ];
then
        auth_backend="authchained"

        #authchained_configuration='$conf['p	lugin']['authchained']['authtypes'] = 'authldap:authplain';'
        #grep -q -F '$conf['plugin']['authchained']['authtypes'] = 'authldap:authplain';' "$final_path/conf/local.protected.php" || echo 'include "/configs/projectname.conf"' >> foo.bar

        # Search if configuration in "config file" is present for plugin to work
        #TODO could be added straight to 'local.protected.php' file ?
        grep -q -F '$conf['plugin']['authchained']['authtypes'] = 'authldap:authplain';' "$final_path/conf/local.protected.php"
        if [ $? -ne 0 ]; then
                # If not found, add the setting to "local.protected.php" which can only be edited by Yunohost
                # \$conf needs the "\" to espace the dollar and avoid echo to interprate it as a (void) variable
                echo "\$conf['plugin']['authchained']['authtypes'] = 'authldap:authplain';" >> "$final_path/conf/local.protected.php"
        fi
        # source: https://stackoverflow.com/questions/3557037/appending-a-line-to-a-file-only-if-it-does-not-already-exist
else
        auth_backend="authldap"
fi

# Set the authentification backend
#ynh_replace_string "^$conf['authtype'].*" "$conf['authtype'] = '$auth_backend';" "$final_path/conf/local.protected.php"
ynh_replace_string "__YNH_AUTH_BACKEND__" "$auth_backend" "$final_path/conf/local.protected.php"
# Set the "admin" user
ynh_replace_string "__YNH_ADMIN_USER__"   "$admin"        "$final_path/conf/local.protected.php"

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum "$final_path/conf/local.protected.php"


# Regen ssowat configuration
yunohost app ssowatconf

# Update the config of the app
ynh_app_setting_set $app auth_backend      $auth_backend
ynh_app_setting_set $app is_internal_users $is_internal_users

#=================================================
# RELOAD NGINX
#=================================================

systemctl reload nginx