#!/bin/bash
# Gab is an alternate client to the chat program at colorfield.space
# Replace the $file_path variable with the path to your chat log
# It is assumed that each line of chat starts as follows: "user_name >"
# other schemes or formats will require modification of the awk script
# found on lines 40 & 46
# # # # # #->

help_text=$'GAB - A simple chat interface\n\nsyntax: gab [flag] [value]\n\nflag          value\n----------    ---------------\n-h, --help     none\n-m, --msg      Quoted text with the msg being added to chat\n-l, --log      An integer representing the number of rows you\'d like to view, default 5'

file_path=./test.txt
title="GAB v1.0"
last_date="Last message: $(date -r $file_path)"

if [ -z "$1" ]
then
	echo $title
	echo $last_date
	echo ""
	tail -n 5 $file_path | awk '{out="\033[7m " $1 " \033[0m "; for (i=3; i<=NF; i++) {out=out" "$i}; print out ORS "- - -"}'

else
	case "$1" in
		-m | --msg) 
			if [ -z "$2" ]
			then
				echo "Must pass a quoted string w/ the msg flag"
				exit 1
			else
				echo "$USER >  $2" >> $file_path
				if [ $? -eq 0 ]
				then
					echo "Successfully added text to chatlog"
					exit 0
				else
					echo "Error adding text to chatlog"
					exit 1
				fi
			fi;;
		-l | --log) 
			if [ -z "$2" ]
			then
				echo $title
				echo $last_date
				echo ""
				tail -n 5 $file_path | awk '{out="\033[7m " $1 " \033[0m "; for (i=3; i<=NF; i++) {out=out" "$i}; print out ORS "- - -"}'
			elif [[ "$2" =~ ^[0-9]+$ ]]
			then
				echo $title
				echo $last_date
				echo ""
				tail -n $2 $file_path | awk '{out="\033[7m " $1 " \033[0m "; for (i=3; i<=NF; i++) {out=out" "$i}; print out ORS "- - -"}'
			else
				echo "Invalid: log value must be an integer"
				exit 1
			fi;;
		-h | --help) 
			echo "$help_text"
			exit 0;;
		*) 
			echo "Unknown flag $1"
			exit 1;;
	esac
fi