#18 File upload in certain folders

* refactors documents and file upload to be distributed into different subfolders, depending on the type of document (InterventionDocument, RevocationDocument, ...)
* refactors Document model into AbstractDocument
* subclasses RevocationDocument, InterventionDocument, COmpensationDocument, EmaDocument and EcoAccountDocument from AbstractDocument to provide proper functionality for each
* adds new specialized routes for each new document type (opening, removing)
* drops generic get and remove routes for documents

ema/views.py

@@ -10,9 +10,10 @@ from compensation.forms import NewStateModalForm, NewActionModalForm, NewDeadlin
 from ema.tables import EmaTable
 from konova.contexts import BaseContext
 from konova.decorators import conservation_office_group_required
-from ema.models import Ema
+from ema.models import Ema, EmaDocument
 from konova.forms import RemoveModalForm, NewDocumentForm, SimpleGeomForm, RecordModalForm
 from konova.settings import DEFAULT_GROUP, ZB_GROUP, ETS_GROUP
+from konova.utils.documents import get_document, remove_document
 from konova.utils.user_checks import in_group
 
 
@@ -250,6 +251,43 @@ def document_new_view(request: HttpRequest, id: str):
     )
 
 
+@login_required
+def get_document_view(request: HttpRequest, doc_id: str):
+    """ Returns the document as downloadable file
+
+    Wraps the generic document fetcher function from konova.utils.
+
+    Args:
+        request (HttpRequest): The incoming request
+        doc_id (str): The document id
+
+    Returns:
+
+    """
+    doc = get_object_or_404(EmaDocument, id=doc_id)
+    return get_document(doc)
+
+
+@login_required
+def remove_document_view(request: HttpRequest, doc_id: str):
+    """ Removes the document from the database and file system
+
+    Wraps the generic functionality from konova.utils.
+
+    Args:
+        request (HttpRequest): The incoming request
+        doc_id (str): The document id
+
+    Returns:
+
+    """
+    doc = get_object_or_404(EmaDocument, id=doc_id)
+    return remove_document(
+        request,
+        doc
+    )
+
+
 @login_required
 def state_remove_view(request: HttpRequest, id: str):
     """ Renders a form for removing an EMA state