Generic cache

I have created a generic cache to hold information outside of the
library.  This could include album art or an artist bio.

libsaria/__init__.py

@@ -13,10 +13,13 @@ if __dev__ == True:
 import event
 import path
 from map import Map
+from cache import Cache
 
 # Variables are not saved across sessions, but preferences are
+# The cache is also saved across sessions
 vars  = None
 prefs = None
+cache = Cache()
 
 plugin = None
 music  = None

libsaria/cache.py

@@ -0,0 +1,35 @@
+# Bryan Schumaker (10/23/2010)
+import libsaria
+
+path   = libsaria.path
+expand = path.expand
+mkdir  = path.mkdir
+exists = path.exists
+join   = path.join
+ls     = path.ls
+
+CACHE_DIR = expand("~/.saria/cache")
+mkdir(CACHE_DIR)
+
+class CacheObject:
+	def __init__(self, path):
+		self.path = path
+
+	def get(self, key, func, *args):
+		path = join(self.path, key)
+		if not exists(path):
+			f = open(path, 'w')
+			if func(f, *args):
+				return path
+		else:
+			return path
+
+class Cache:
+	def keys(self):
+		return ls(CACHE_DIR)
+
+	def __getitem__(self, key):
+		p = join(CACHE_DIR, key)
+		if not exists(p):
+			mkdir(p)
+		return CacheObject(p)

libsaria/path.py

@@ -7,7 +7,7 @@ is_dir   = os.path.isdir
 expand   = os.path.expanduser
 splitext = os.path.splitext
 join     = os.path.join
-mkdir    = os.mkdir
+makedir  = os.mkdir
 rm       = os.remove
 ls       = os.listdir
 walk     = os.walk
@@ -58,3 +58,8 @@ def cp_once(src, dest):
 	cp = shutil.copy
 	cp(src, dest)
 cp = cp_once
+
+
+def mkdir(path):
+	if not exists(path):
+		makedir(path)

tests/cache.py

@@ -0,0 +1,9 @@
+# Bryan Schumaker (10/23/2010)
+
+import libsaria
+
+cache = libsaria.cache
+
+obj = cache["test"]
+#obj = cache["Train"]
+#print obj["Save Me, San Francisco.jpg"]