Initial changes to support the new Django 1.6 project structure

mayan/apps/document_indexing/filesystem.py

@@ -0,0 +1,106 @@
+from __future__ import absolute_import
+
+import errno
+import os
+
+from django.utils.translation import ugettext_lazy as _
+
+from .conf.settings import (FILESYSTEM_SERVING, SUFFIX_SEPARATOR)
+
+
+def assemble_suffixed_filename(filename, suffix=0):
+    """
+    Split document filename, to attach suffix to the name part then
+    re attacht the extension
+    """
+
+    if suffix:
+        name, extension = os.path.splitext(filename)
+        return SUFFIX_SEPARATOR.join([name, unicode(suffix), os.extsep, extension])
+    else:
+        return filename
+
+
+def assemble_path_from_list(directory_list):
+    return os.path.normpath(os.sep.join(directory_list))
+
+
+def get_instance_path(index_instance):
+    """
+    Return a platform formated filesytem path corresponding to an
+    index instance
+    """
+    names = []
+    for ancestor in index_instance.get_ancestors():
+        names.append(ancestor.value)
+
+    names.append(index_instance.value)
+
+    return assemble_path_from_list(names)
+
+
+def fs_create_index_directory(index_instance):
+    if index_instance.index_template_node.index.name in FILESYSTEM_SERVING:
+        target_directory = assemble_path_from_list([FILESYSTEM_SERVING[index_instance.index_template_node.index.name], get_instance_path(index_instance)])
+        try:
+            os.mkdir(target_directory)
+        except OSError, exc:
+            if exc.errno == errno.EEXIST:
+                pass
+            else:
+                raise Exception(_(u'Unable to create indexing directory; %s') % exc)
+
+
+def fs_create_document_link(index_instance, document, suffix=0):
+    if index_instance.index_template_node.index.name in FILESYSTEM_SERVING:
+        filename = assemble_suffixed_filename(document.file_filename, suffix)
+        filepath = assemble_path_from_list([FILESYSTEM_SERVING[index_instance.index_template_node.index.name], get_instance_path(index_instance), filename])
+
+        try:
+            os.symlink(document.file.path, filepath)
+        except OSError, exc:
+            if exc.errno == errno.EEXIST:
+                # This link should not exist, try to delete it
+                try:
+                    os.unlink(filepath)
+                    # Try again
+                    os.symlink(document.file.path, filepath)
+                except Exception, exc:
+                    raise Exception(_(u'Unable to create symbolic link, file exists and could not be deleted: %(filepath)s; %(exc)s') % {'filepath': filepath, 'exc': exc})
+            else:
+                raise Exception(_(u'Unable to create symbolic link: %(filepath)s; %(exc)s') % {'filepath': filepath, 'exc': exc})
+
+
+def fs_delete_document_link(index_instance, document, suffix=0):
+    if index_instance.index_template_node.index.name in FILESYSTEM_SERVING:
+        filename = assemble_suffixed_filename(document.file_filename, suffix)
+        filepath = assemble_path_from_list([FILESYSTEM_SERVING[index_instance.index_template_node.index.name], get_instance_path(index_instance), filename])
+
+        try:
+            os.unlink(filepath)
+        except OSError, exc:
+            if exc.errno != errno.ENOENT:
+                # Raise when any error other than doesn't exits
+                raise Exception(_(u'Unable to delete document symbolic link; %s') % exc)
+
+
+def fs_delete_index_directory(index_instance):
+    if index_instance.index_template_node.index.name in FILESYSTEM_SERVING:
+        target_directory = assemble_path_from_list([FILESYSTEM_SERVING[index_instance.index_template_node.index.name], get_instance_path(index_instance)])
+        try:
+            os.removedirs(target_directory)
+        except OSError, exc:
+            if exc.errno == errno.EEXIST:
+                pass
+            else:
+                raise Exception(_(u'Unable to delete indexing directory; %s') % exc)
+
+
+def fs_delete_directory_recusive(index):
+    if index.name in FILESYSTEM_SERVING:
+        path = FILESYSTEM_SERVING[index.name]
+        for dirpath, dirnames, filenames in os.walk(path, topdown=False):
+            for filename in filenames:
+                os.unlink(os.path.join(dirpath, filename))
+            for dirname in dirnames:
+                os.rmdir(os.path.join(dirpath, dirname))