# HG changeset patch
# User Jeremy Thurgood <firxen@gmail.com>
# Date 1336416267 -7200
# Node ID 1e8f7e694f0ce8caeb8ced88bd0dd4c1fb648572
# Parent  d35a3762edda15452d199642cf465c665d9f1121
Refactor missions and sciences a bit to reduce duplication.

diff -r d35a3762edda -r 1e8f7e694f0c gamelib/game_base.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gamelib/game_base.py	Mon May 07 20:44:27 2012 +0200
@@ -0,0 +1,26 @@
+
+
+def get_subclasses(base_class, leaf_only=True):
+    subclasses = []
+    for cls in base_class.__subclasses__():
+        if leaf_only and cls.__subclasses__():
+            # Not a leaf class, and only want leaves
+            continue
+        subclasses.append(cls)
+    return subclasses
+
+
+class Science(object):
+    NAME = None
+    PREREQUISITES = ()
+    ACQUISITION_CHANCE = 1.0
+    SCIENCE_TYPE = None
+
+    def __init__(self, points=0):
+        self.points = points
+
+    def spend_point(self):
+        self.points += 1
+
+    def can_spend(self, lab):
+        return True
diff -r d35a3762edda -r 1e8f7e694f0c gamelib/gamestate.py
--- a/gamelib/gamestate.py	Mon May 07 16:53:18 2012 +0200
+++ b/gamelib/gamestate.py	Mon May 07 20:44:27 2012 +0200
@@ -3,7 +3,8 @@
 
 """The actual game state object"""
 
-from gamelib import missions, lab, products
+from gamelib import missions, lab
+from gamelib.game_base import get_subclasses
 
 
 class Game(object):
@@ -24,11 +25,7 @@
         else:
             self.lab = lab.Lab()
             # instantiate all the available missions
-            for cls in missions.Mission.__subclasses__():
-                if cls.__subclasses__():
-                    # Not a leaf class, so base class for other missions
-                    continue
-                # Add mission to the list
+            for cls in get_subclasses(missions.Mission):
                 self.missions.append(cls())
 
     def start_turn(self):
@@ -40,7 +37,7 @@
     def get_available_equipment(self):
         """Return a list of equipment we can produce and afford"""
         available = [x for x in self.lab.science
-                if isinstance(x, products.Product) and x.COST <= self.money]
+                     if x.SCIENCE_TYPE == 'product' and x.COST <= self.money]
         return available
 
     def get_available_missions(self):
diff -r d35a3762edda -r 1e8f7e694f0c gamelib/lab.py
--- a/gamelib/lab.py	Mon May 07 16:53:18 2012 +0200
+++ b/gamelib/lab.py	Mon May 07 20:44:27 2012 +0200
@@ -3,6 +3,7 @@
 from random import random, choice
 
 from gamelib import research, products
+from gamelib.game_base import get_subclasses
 
 
 class Lab(object):
@@ -11,8 +12,8 @@
 
     def __init__(self, init_data=None):
         self.science = []
-        self.new_research = research.ResearchArea.__subclasses__()
-        self.new_products = products.Product.__subclasses__()
+        self.new_research = get_subclasses(research.ResearchArea)
+        self.new_products = get_subclasses(products.Product)
 
         if init_data is not None:
             # Load stored state.
diff -r d35a3762edda -r 1e8f7e694f0c gamelib/products.py
--- a/gamelib/products.py	Mon May 07 16:53:18 2012 +0200
+++ b/gamelib/products.py	Mon May 07 20:44:27 2012 +0200
@@ -1,4 +1,5 @@
 from gamelib import research
+from gamelib.game_base import Science
 
 
 # Kinds of product.
@@ -8,9 +9,7 @@
 PATHOGEN = 'pathogen'
 
 
-class Product(object):
-    NAME = None
-    PREREQUISITES = ()
+class Product(Science):
     ACQUISITION_CHANCE = 0.8
     COST = None
     UPGRADE_REQUIREMENT = 1
@@ -18,12 +17,6 @@
     SCIENCE_TYPE = 'product'
     CATEGORIES = ()
 
-    def __init__(self, points=0):
-        self.points = points
-
-    def spend_point(self):
-        self.points += 1
-
     def can_spend(self, lab):
         extra = self.UPGRADE_REQUIREMENT * self.points + 1
         return lab.meet_requirements(self, extra)
diff -r d35a3762edda -r 1e8f7e694f0c gamelib/research.py
--- a/gamelib/research.py	Mon May 07 16:53:18 2012 +0200
+++ b/gamelib/research.py	Mon May 07 20:44:27 2012 +0200
@@ -1,16 +1,8 @@
-class ResearchArea(object):
-    NAME = None
-    PREREQUISITES = ()
-    SCIENCE_TYPE = 'research'
+from gamelib.game_base import Science
+
 
-    def __init__(self, points=0):
-        self.points = points
-
-    def spend_point(self):
-        self.points += 1
-
-    def can_spend(self, lab):
-        return True
+class ResearchArea(Science):
+    SCIENCE_TYPE = 'research'
 
 
 class Tesla(ResearchArea):