#!/bin/bash

#'
#This Bash script takes a json array of form [{"user_id": "@asdX:domain.com", "displayname": "nameX"}, {"user_id": "@asdY:domain.com", "displayname": null}] and iterates over them with the delete user api which is exclusive to Synapse.
#This array is supplied as a file parameter and created with another script (see filter_users_by_*.sh)
#
#See: https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#deactivate-account
#
#'


set -e

domain=$1
login_file=$2
input_file=$3
output_folder=$4

if [ -z "$domain" -o ! -e "$input_file" -o ! -e "$login_file" ]; then
    echo "Domain: $domain, login file: $login_file, input file: $input_file, output folder: $output_folder"
    echo "Usage: $0 http(s)://<DOMAIN> <LOGIN_FILE> <INPUT_FILE> [OUTPUT_FOLDER]"
    exit 1
fi
if [ ! -z "$output_folder" -a ! -d "$output_folder" ]; then
    echo "The given output folder ($output_folder) is not a valid directory! Creating it ..."
    mkdir $output_folder
fi

USER_COUNT=$(jq '. | length' "$input_file")
echo "Found $USER_COUNT users to delete in the input file. Example: "
echo $(jq '.[0]' "$input_file")
echo
echo "Other Example: "
echo $(jq '.[-1]' "$input_file")
echo

read -p "Is this looking correct? (y/n) " reply
if [ "$reply" != "y" -a "$reply" != "Y" ]; then
    echo "Aborting ..."
    exit 0
fi

token=$(jq -r '.access_token' "$login_file")


for ((i = 0; i < $USER_COUNT; i++ ));do
    user_json=$(jq ".[$i]" "$input_file")
    user_displayname=$(echo $user_json | jq -r '.displayname')
    user_id=$(echo $user_json | jq -r '.user_id')
    user_id_enc=$(echo $user_json | jq -r '.user_id' | sed 's/@/%40/g' | sed 's/:/%3A/g')  # user id has to be URL encoded (bootleg version)
    echo "Currently purging user $user_displayname with ID: $user_id ..."

    if [ -d "$output_folder" ]; then
        output_file="$output_folder/$user_id_enc-delete_result.txt"
    fi

    if [ ! -z "$output_file" ]; then
        echo curl --globoff -XPOST -H "Authorization: Bearer [TOKEN]" -d "{\"erase\": true}" "$domain/_synapse/admin/v1/deactivate/$user_id_enc" -o "$output_file"
        curl --globoff -XPOST -H "Authorization: Bearer $token" -d "{\"erase\": true}" "$domain/_synapse/admin/v1/deactivate/$user_id_enc" -o "$output_file"
    else
        echo curl --globoff -XPOST -H "Authorization: Bearer [TOKEN]" -d "{\"erase\": true}" "$domain/_synapse/admin/v1/deactivate/$user_id_enc"
        curl --globoff -XPOST -H "Authorization: Bearer $token" -d "{\"erase\": true}" "$domain/_synapse/admin/v1/deactivate/$user_id_enc"
    fi
    
    echo "Sleeping for 5 seconds ..."
    sleep 5
    
done