Improve botsnack plugin.

- More fun phrases depending on hunger level
- Simulated hunger (yay math)
- Better abuse prevention

modules/botsnack.py

@@ -1,25 +1,109 @@
 #!/usr/bin/python2
 """
-botsnack.py - .botsnack module
+botsnack.py - .botsnack module (aka simulated hunger 1.0)
 author: mutantmonkey <mutantmonkey@gmail.com>
+author: Casey Link <unnamedrambler@gmail.com>
+
+This module simulates bot hunger and provides a mechanism
+for users to feed the bot.
+
+To prevent abuse when the bot gets very, very full, it explodes
+and enters a random cooldown period for 3-10 minutes. When in this
+cooldown period all calls to botsnack are ignored.
 """
 
-import random
+import random, math, time
+
+# the rate that affects how much eating a snack nourishes the bot
+# smaller number = less nourishment = more snacks can be eaten (before fullness)
+# larger number = more nourishment = less snacks can be eaten
+r_eat = 0.05
+
+# the rate that affects how fast the bot becomes hungry over time
+# smaller number = the bot gets hungry slower
+# larger number = the bot gets hungry faster
+r_hunger = 0.005
+
+def increase_hunger(current_hunger, x):
+    # more hungry === value closer to 0
+    return current_hunger * math.exp(-r_hunger * x)
+
+def decrease_hunger(current_hunger, food_value):
+    # less hungry === closer to 100
+    if current_hunger > 50: # exponential growth
+        return min(100, current_hunger * math.exp(r_eat*food_value))
+    else: # linear increase
+        return current_hunger + food_value
 
 def botsnack(phenny, input):
-	messages = ["Om nom nom", "Delicious, thanks!"]
-	response = random.choice(messages)
 
-	botsnack.snacks += 1
+    now = time.time()
+
+    # 0. Handle cooldown.
+    #    Check if the cooldown period has elapsed, if not, then
+    #    ignore this invocation. Else reset to the default state
+    if botsnack.coolingdown:
+        if now - botsnack.coolingstarted > botsnack.coolingperiod:
+            print "cooling down over, reseting"
+            botsnack.coolingdown = False
+            botsnack.hunger = 50.0
+            botsnack.last_tick = now
+        else:
+            print "cooling down! %s < %s" %(now - botsnack.coolingstarted, botsnack.coolingperiod)
+            return # ignore!
+
+    # 1. Time has has passed, so the bot has gotten
+    #    hungry. Lets increase his/her hunger proportionate
+    #    to the amount of time that has passeed.
+    delta = now - botsnack.last_tick
+    old_hunger = botsnack.hunger
+
+    botsnack.hunger = increase_hunger(old_hunger, delta)
+
+    print "hunger was %s, increased to %s" %(old_hunger, botsnack.hunger)
+
+    botsnack.last_tick = now
+
+    # 2. Eat some food. Send resposne
+
+    old_hunger = botsnack.hunger
+    botsnack.hunger = decrease_hunger(old_hunger, random.uniform(1,5))
+    print "hunger was %s, decreased to %s" %(old_hunger, botsnack.hunger)
+
+    if botsnack.hunger > 95: # special case to prevent abuse
+        phenny.say("Too much food!")
+        phenny.do("explodes")
+        botsnack.coolingperiod = random.uniform(3,10)*60
+        botsnack.coolingstarted = now
+        botsnack.coolingdown = True
+        return
+
+    if botsnack.hunger > 90:
+        messages = ["I don't think this will fit...", "Ugh, no more please", "Seriously, I can't eat anymore!", "/me shudders but downs the snack anyways"]
+    elif botsnack.hunger > 70:
+        messages = ["Thanks, but that's enough", "I suppose I could have one more", "If you insist"]
+    elif botsnack.hunger > 50:
+        messages = ["Om nom nom", "Delicious, thanks!", "Yummy!", "Wow! That's delicious"]
+    elif botsnack.hunger > 30:
+        messages = ["That really hit the spot!", "/me smacks lips", "Mmmmm!"]
+    elif botsnack.hunger > 10:
+        messages = ["Awww yea, that was tasty", "/me munches rudely", "Do you have any more?"]
+    elif botsnack.hunger > 1:
+        messages = ["/me noms furiously", "I really needed that!", "I'll take another!"]
+    else:
+        messages = ["I'M STARVING. GIVE ME MORE!", "/me gnaws ravenously on the snack with a starved look"]
+
+    msg = random.choice(messages)
+    if msg.startswith("/me "):
+        phenny.do(msg.partition("/me ")[2])
+    else:
+        phenny.say(msg)
 
-	if botsnack.snacks % 7 == 0:
-		phenny.say("Too much food!")
-		phenny.do("explodes")
-	else:
-		phenny.say(response)
 botsnack.commands = ['botsnack']
 botsnack.priority = 'low'
-botsnack.snacks = 0
+botsnack.hunger = 50.0
+botsnack.last_tick = time.time()
+botsnack.coolingdown = False
 
 if __name__ == '__main__':
 	print __doc__.strip()