#!/bin/bash

input_file=$1
output_file=$3
pattern=$2

if [ -z $input_file -o -z $pattern ]; then
    echo "input file: $input_file, pattern: $pattern"
    echo "Usage: $0 <./path/to/matrix-rooms.txt> <PATTERN> [./path/to/output.txt]"
    exit 0
fi

#echo "Converting matrix account data into a comprehensive room list ..."
if [ -z $output_file ]; then
    jq ".rooms.join | [to_entries[] | {\"room_id\": .key, \"room_name\": .value.state.events[] | select(.type == \"m.room.name\").content.name, \"users\": [.value.state.events[] | select(.type == \"m.room.member\") | {\"user_id\": .sender, \"displayname\": .content.displayname}]} | select(.users[].displayname | match(\"$pattern\")?)] | group_by(.room_id) | map({room_id: .[0].room_id, room_name: .[0].room_name, matches: length, users: .[0].users})" "$input_file"


else
    jq ".rooms.join | [to_entries[] | {\"room_id\": .key, \"room_name\": .value.state.events[] | select(.type == \"m.room.name\").content.name, \"users\": [.value.state.events[] | select(.type == \"m.room.member\") | {\"user_id\": .sender, \"displayname\": .content.displayname}]} | select(.users[].displayname | match(\"$pattern\")?)] | group_by(.room_id) | map({room_id: .[0].room_id, room_name: .[0].room_name, matches: length, users: .[0].users})" "$input_file" > $output_file
fi