Added start of inventory module.

.gitignore

@@ -1,3 +1,7 @@
+# Us
+_test/
+cookies.txt
+
 # Emacs
 *~
 

inventory.py

@@ -0,0 +1,28 @@
+import os
+import json
+
+def get_datadir():
+    return os.getenv('SB_DATADIR')
+
+def get_article_path(slug):
+    return os.path.join(get_datadir(), 'articles', slug + '.json')
+
+def load_article_by_slug(slug):
+    with open(get_article_path(slug), 'r') as f:
+        return json.load(f)
+
+def save_article(data):
+    with open(get_article_path(data['slug']), 'r') as f:
+        return json.save(data, f)
+
+def get_date_report_path(date):
+    dstr = date.strftime('%Y-%m-%d')
+    return os.path.join(get_datadir(), 'days', dstr + '.json')
+
+def load_date_report(date):
+    with open(get_date_report_path(date), 'r') as f:
+        return json.load(f)
+
+def save_date_report(date, data):
+    with open(get_date_report_path(date), 'w') as f:
+        json.dump(data, f)