#!/usr/bin/env bash

# The Multi-Server Finger Monitor - ver 2.1
# Displays activity from three finger servers within the fingerverse:

# https://640kb.neocities.org/fingerverse/index.html

# 30may2025: version 2.0 fixes the original messy output with improved
# alignment.

# 31may2025: version 2.1 fixes the happynetbox output to remove the leading
# "> " from the usernames. Now all usernames for the 3 servers are aligned.

# The original, in-house version was this subshell (copy/paste to terminal):

# (finger @happynetbox.com | sed -n '5,10p'; finger @plan.cat | sed -n '2,7p')

# I would add more servers but the few remaining do not output user activity
# based on most recent.

# I was finding the original sed-based command very useful and wanted to
# share (a slightly improved version of it).

# .---------- Example (finger @happynetbox.com | sed -n '5,10p') ----------.
# |                                                                        |
# |  -n   : Silences all output by default (no automatic printing).        |
# |                                                                        |
# |  5,10 : Defines a range: "Start at line 5, end at line 10."            |
# |                                                                        |
# |  p    : Prints only the lines in that range.                           |
# |                                                                        |
# '------------------------------------------------------------------------'

# install:   chmod +x fm && sudo install fm /usr/local/bin
# uninstall: sudo rm /usr/local/bin/fm

# Usage: fm (or ./fm)

# ------------------------------ Start Script -------------------------------

# Verify finger client exists
if ! command -v finger &> /dev/null; then
  echo "Error: finger client not found. Please install finger package." >&2
  exit 1
fi

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

  printf "\n%s\n" "$header"
  
  case "$server" in
    "happynetbox.com")
      echo "$content" | sed 's/^> //'
      ;;
    "plan.cat")
      echo "$content" | awk '{
        username = $1;
        timestamp = $(NF-4)" "$(NF-3)" "$(NF-2)" "$(NF-1)" "$NF;
        printf "%-20s %s\n", username, timestamp
      }'
      ;;
    "thebackupbox.net")
      echo "$content" | 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 (recent user updates)
  happynetbox=$(finger @happynetbox.com 2>/dev/null | sed -n '5,10p')
  format_output "----- happynetbox.com ----" "$happynetbox" "happynetbox.com"
  
  # Query plan.cat (user activity with full timestamps)
  plancat=$(finger @plan.cat 2>/dev/null | sed -n '2,7p')
  format_output "-------- plan.cat --------" "$plancat" "plan.cat"
  
  # Query thebackupbox.net (Finger Ring status)
  backupbox=$(finger ring@thebackupbox.net 2>/dev/null | sed -n '20,25p')
  format_output "---- thebackupbox.net ----" "$backupbox" "thebackupbox.net"
}

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

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

# .-----------------------.---------------.----------------------.
# |  640kb.neocities.org  |  31 May 2025  |  fm@happynetbox.com  |
# '-----------------------'---------------'----------------------'