fix coin debt exploit

Reviewed-on: mud/bankerbot-rb#3

coin.rb

@@ -3,14 +3,15 @@ require 'yaml'
 require 'discordrb'
 
 
-MAX_COINS_PER_DAY = 4
+MAX_COINS_PER_DAY = 999
 COIN_TIMEOUT = 15
 SCOREBOARD = './scoreboard.yml'
-
 PASTA='You know what? Im done, i am leaving, we were friendly talking about the subject. This crossed the line of "ok killer of joy" to "no fun allowed"'
+COIN_EMOJI = '🪙'
+BAG_EMOJI = '💰'
 
-coin_state_active = false
-coins_offered_today = 0
+$coin_state_active = false
+$coins_offered_today = 0
 
 bot = Discordrb::Bot.new token: ENV['DISCORD_TOKEN']
 
@@ -59,6 +60,58 @@ def clean_name(input)
   input.tr '@', ''
 end
 
+def get_coin(event)
+  # update score
+  author = event.methods.include?(:author) ? event.author : event.user
+
+  if $coin_state_active
+    if author.bot_account?
+      event.respond "Bots don't get coins!"
+    end
+    $coin_state_active = false
+    if(rand(100) == 47)
+      hyper_coin_amount = rand(100)
+      coins = increment_coin(event.author.id, hyper_coin_amount)
+      event.respond "What astounding luck!!! #{clean_name author.display_name}, you've just activated HYPER COIN EVENT and have received #{hyper_coin_amount} coins for a grand total of #{coins} coins!"
+    else
+      coins = increment_coin(author.id)
+      event.respond "Nice catch, #{clean_name author.display_name}! You have #{plural('coin', coins)} now!"
+    end
+  else
+    event.respond "No coins for you, #{clean_name author.display_name}!"
+  end
+end
+
+def give_coin(event)
+  reactor_coins = get_coin_count(event.user.id)
+  if reactor_coins <= 0
+    event.respond("Nice gesture, <@#{event.user.id}>, but you're broke! To get more coins, type the words `GET COIN` whenever I post the coin event message! But be quick, your friends are trying their best to get it before you do!")
+    return
+  end
+
+  if event.message.author == event.user
+    event.respond("<@#{event.user.id}>, you can't give coins to yourself!")
+    return
+  end
+
+
+  coin_amount = 0
+  if event.emoji.name == COIN_EMOJI
+    coin_amount = 1
+  elsif event.emoji.name == BAG_EMOJI
+    coin_amount = 5
+  end
+
+  if reactor_coins  < coin_amount 
+    coin_amount = reactor_coins
+  end
+
+  increment_coin(event.message.author.id, coin_amount)
+  increment_coin(event.user.id, -coin_amount)
+
+  event.respond "How nice! <@#{event.message.author.id}> has received #{plural('coin', coin_amount)} from <@#{event.user.id}>!"
+end
+
 bot.message(in: Integer(ENV['BOT_CHANNEL'])) do |event|
   if event.message.attachments.count { |x| x.filename.scan(/coin*/).length > 0 } > 0
     event.respond "Oh no! Looks like you tried to post a fradulent coin! #{clean_name event.author.display_name}, your coin balance has now been emptied. Let that be a lesson for next time!"
@@ -67,23 +120,7 @@ bot.message(in: Integer(ENV['BOT_CHANNEL'])) do |event|
 end
 
 bot.message(content: 'GET COIN' ) do |event|
-  # update score
-  if coin_state_active
-    if event.author.bot_account?
-      event.respond "Bots don't get coins!"
-    end
-    coin_state_active = false
-    if(rand(100) == 47)
-      hyper_coin_amount = rand(100)
-      coins = increment_coin(event.author.id, hyper_coin_amount)
-      event.respond "What astounding luck!!! #{clean_name event.author.display_name}, you've just activated HYPER COIN EVENT and have received #{hyper_coin_amount} coins for a grand total of #{coins} coins!"
-    else
-      coins = increment_coin(event.author.id)
-      event.respond "Nice catch, #{clean_name event.author.display_name}! You have #{plural('coin', coins)} now!"
-    end
-  else
-    event.respond "No coins for you, #{clean_name event.author.display_name}!"
-  end
+  get_coin(event)
 end
 
 bot.message(with_text: '/coins') do |event|
@@ -95,27 +132,38 @@ bot.message(with_text: '!leave') do |event|
 event.respond PASTA
 end
 
-bot.message(with_text: '!cum', in: Integer(ENV['CUM_CHANNEL'])) do |event|
+bot.message(with_text: 'boobs', in: Integer(ENV['CUM_CHANNEL'])) do |event|
 next if not ENV['CUM_CHANNEL']
 event.respond "OHHHHHH IM GONNA CUM"
 end
 
+bot.reaction_add do |event|
+  next unless [COIN_EMOJI, BAG_EMOJI].include? event.emoji.name
+
+  if event.message.author.id == bot.bot_application.id
+    get_coin(event)
+  else
+    give_coin(event)
+  end
+
+end
+
 bot.run(true)
 
 loop do
   # sleep random amount of time between 1 and 4 hours
   sleep(get_random_hours(1, 4))
   # activate coin state
-  coin_state_active = true
+  $coin_state_active = true
   # send coin GIF
   bot.send_file(ENV['BOT_CHANNEL'], File.open('./coin.gif', 'r'))
-  coins_offered_today += 1
+  $coins_offered_today += 1
 
   # if max coins per day has reached, sleep until midnight
-  if coins_offered_today >= MAX_COINS_PER_DAY
+  if $coins_offered_today >= MAX_COINS_PER_DAY
     sleep(get_seconds_to_midnight(Time.now))
     sleep(get_random_hours(5, 11))
-    coins_offered_today = 0
+    $coins_offered_today = 0
   end
 end