#!/usr/bin/env bash

# The Multi-Server Finger Monitor / Blue Oak Model License 1.0.0

# Displays activity from three core finger servers:
# https://640kb.neocities.org/fingerverse/index.html

# Changelog:
# 3.1 (07dec2025) : Formatted code for better readability.
# 3.0 (28nov2025) : Added blocklist feature
# 2.6 (10oct2025) : Added CLIENT_NAME variable; general cleanup
# Original/inhouse: (finger @happynetbox.com | sed -n '5,10p'; finger @plan.cat | sed -n '2,7p')

# usage: fm

# ---------------------------------------------------------------------------

# Change this to your preferred command-line finger client:

CLIENT_NAME="finger"

# Blocklist - add accounts you don't want to see (format: username@server)

BLOCKLIST=(
    "trollacct1@happynetbox.com"
    "trollacct2@plan.cat"
    "trollacct3@thebackupbox.net"
    # "trollacct4@plan.cat"
    # "trollacct5@thebackupbox.net"
    # Add more entries as needed
)

filter_blocked() {
    local content="$1"
    local server="$2"
    
    if [ ${#BLOCKLIST[@]} -eq 0 ]; then
        echo "$content"
        return
    fi
    
    while IFS= read -r line; do
        local blocked=0
        for blocked_account in "${BLOCKLIST[@]}"; do

            [[ -z "$blocked_account" || "$blocked_account" =~ ^[[:space:]]*# ]] && continue
            
            if [[ "$blocked_account" == *"@$server" ]] && [[ "$line" == *"${blocked_account%@*}"* ]]; then
                blocked=1
                break
            fi
        done
        
        [ $blocked -eq 0 ] && echo "$line"
    done <<< "$content"
}

format_output() {
  header="$1"
  content="$2"
  server="$3"

  printf "\n%s\n" "$header"
  
  filtered_content=$(filter_blocked "$content" "$server" | head -n 6)
  
  case "$server" in
    "happynetbox.com")
      echo "$filtered_content" | sed 's/^> //'
      ;;
    "plan.cat")
      echo "$filtered_content" | awk '{
        username = $1;
        timestamp = $(NF-4)" "$(NF-3)" "$(NF-2)" "$(NF-1)" "$NF;
        printf "%-20s %s\n", username, timestamp
      }'
      ;;
    "thebackupbox.net")
      echo "$filtered_content" | tr -d '\r' | awk -F'[/ ]+' '{
        date_part = $2;
        username = $NF;
        url = substr($0, index($0, "finger://"));
        printf "%-20s %-15s %s\n", username, date_part, url
      }'
      ;;
  esac
}

monitor_servers() {
  # Query happynetbox.com (user updates; extra lines (re: version 3.0))
  happynetbox=$($CLIENT_NAME @happynetbox.com 2>/dev/null | sed -n '5,15p')
  format_output "----- happynetbox.com ----" "$happynetbox" "happynetbox.com"
  
  # Query plan.cat (with full timestamps; extra lines (re: version 3.0))
  plancat=$($CLIENT_NAME @plan.cat 2>/dev/null | sed -n '2,12p')
  format_output "-------- plan.cat --------" "$plancat" "plan.cat"
  
  # Query thebackupbox.net (Finger Ring status; extra lines (re: version 3.0))
  backupbox=$($CLIENT_NAME ring@thebackupbox.net 2>/dev/null | sed -n '20,35p')
  format_output "---- thebackupbox.net ----" "$backupbox" "thebackupbox.net"
}

if ! monitor_servers; then
  echo "Error: Failed to query one or more finger servers" >&2
  exit 1
fi

echo -e "\n--------------------------"
exit 0