1 files changed, 51 insertions, 4 deletions
diff --git a/backend/utils.py b/backend/utils.py
index ddb0adc..bab7ebe 100644
--- a/backend/utils.py
+++ b/backend/utils.py
@@ -1,12 +1,59 @@
+import sqlite3
+import os
+
 import config
 
+db = sqlite3.connect(config.database, check_same_thread = False)
+
 def redirect(target):
 	return ["", [('Content-Type','text/html'), ("Location", target)], "302 Redirect"]
 
 def ensure_user(name):
-	# TODO
+	# Add a user directory if configured
+	if config.user_subdirs:
+		try:
+			os.mkdir(config.fileroot + name)
+		except FileExistsError:
+			pass
+
+	# Add the user to the database
+	db.cursor().execute("INSERT OR IGNORE INTO users (name) VALUES (:user)", {"user": name})
+	db.commit()
 	return
 
-def is_user(name):
-	# TODO
-	return False
+def userdir(name):
+	rootdir = config.fileroot
+	if config.user_subdirs:
+		rootdir += name + "/"
+	return rootdir
+
+def sanitize_filename(input):
+	filename = "".join(filter(lambda c: c not in "<>&", os.path.basename(input)))
+	# os.path.basename still allows `..` as basename
+	if not filename or filename.startswith("."):
+		raise ValueError("Invalid filename supplied: " + filename)
+	return filename
+
+def target_filename_internal(alias, filename):
+	target = alias["path"] + "/"
+	if filename:
+		target += filename
+	if config.user_subdirs:
+		target = alias["user"] + "/" + target
+	return target
+
+def target_filename(alias, file):
+	return config.fileroot + target_filename_internal(alias, file)
+
+def dirlisting(path, files, dirs):
+	listing = []
+	entries = sorted(os.listdir(path))
+
+	for entry in entries:
+		if dirs and os.path.isdir(path + entry):
+			listing.append({"name": entry})
+		if files and os.path.isfile(path + entry):
+			size = os.path.getsize(path + entry)
+			listing.append({"name": entry, "size": size})
+
+	return listing