Added simple statistics page (total used storage, total docs, etc)

apps/documents/statistics.py

@@ -0,0 +1,51 @@
+from django.utils.translation import ugettext as _
+from documents.conf.settings import STORAGE_BACKEND
+
+from common.utils import pretty_size, pretty_size_10
+
+from models import Document, DocumentType
+
+
+def get_used_size(path, file_list):
+    total_size = 0
+    for filename in file_list:
+        try:
+            total_size += STORAGE_BACKEND().size(STORAGE_BACKEND.separator.join([path, filename])) 
+        except OSError:
+            pass
+            
+    return total_size
+
+def storage_count(path=u'.'):
+    directories, files = STORAGE_BACKEND().listdir(path)
+    total_count = len(files)
+    total_size = get_used_size(path, files)
+    
+    for directory in directories:
+        file_count, files_size = storage_count(directory)
+        total_count += file_count
+        total_size += files_size
+
+    return total_count, total_size
+
+
+def get_statistics():
+    total_db_documents = Document.objects.only('pk',).count()
+
+    
+    paragraphs = [
+        _(u'Document types: %d') % DocumentType.objects.count(),
+        _(u'Documents in database: %d') % total_db_documents
+    ]
+    try:
+        total_storage_documents, storage_used_space = storage_count()
+        paragraphs.append(_(u'Documents in storage: %d') % total_storage_documents)
+        paragraphs.append(_(u'Space used in storage: %s (base 2), %s (base 10), %d bytes') %
+            (pretty_size(storage_used_space), pretty_size_10(storage_used_space), storage_used_space))
+    except NotImplementedError:
+        pass
+    
+    return {
+        'title':_(u'Document statistics'),
+        'paragraphs': paragraphs
+    }