Add documents to decoders (#22)

* Add decoder documents support
* Use abstract model for Documents
* Increase version
* Code cleanup

ram/ram/__init__.py

@@ -1,4 +1,4 @@
 from ram.utils import git_suffix
 
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __version__ += git_suffix(__file__)

ram/ram/models.py

@@ -0,0 +1,30 @@
+import os
+
+from django.db import models
+from django.utils.safestring import mark_safe
+
+from ram.utils import DeduplicatedStorage
+
+
+class Document(models.Model):
+    description = models.CharField(max_length=128, blank=True)
+    file = models.FileField(
+        upload_to="files/",
+        storage=DeduplicatedStorage(),
+        null=True,
+        blank=True,
+    )
+
+    class Meta:
+        abstract = True
+
+    def __str__(self):
+        return "{0}".format(os.path.basename(self.file.name))
+
+    def filename(self):
+        return self.__str__()
+
+    def download(self):
+        return mark_safe(
+            '<a href="{0}" target="_blank">Link</a>'.format(self.file.url)
+        )

ram/ram/utils.py

@@ -16,7 +16,7 @@ class DeduplicatedStorage(FileSystemStorage):
 
     def save(self, name, content, max_length=None):
         if super().exists(name):
-            new = hashlib.sha256(content.file.getbuffer()).hexdigest()
+            new = hashlib.sha256(content.read()).hexdigest()
             with open(super().path(name), "rb") as file:
                 file_binary = file.read()
                 old = hashlib.sha256(file_binary).hexdigest()