Add release download size to API and web interface

app/models/packages.py

@@ -17,6 +17,7 @@
 
 import datetime
 import enum
+import os
 
 from flask import url_for
 from flask_babel import lazy_gettext
@@ -979,6 +980,23 @@ class PackageRelease(db.Model):
 	def file_path(self):
 		return self.url.replace("/uploads/", app.config["UPLOAD_DIR"])
 
+	@property
+	def file_size_bytes(self):
+		path = self.file_path
+		if not os.path.isfile(path):
+			return 0
+
+		file_stats = os.stat(path)
+		return file_stats.st_size
+
+	@property
+	def file_size(self):
+		size = self.file_size_bytes / 1024
+		if size > 1024:
+			return f"{round(size / 1024, 1)} MB"
+		else:
+			return f"{round(size)} KB"
+
 	def as_dict(self):
 		return {
 			"id": self.id,
@@ -989,6 +1007,7 @@ class PackageRelease(db.Model):
 			"downloads": self.downloads,
 			"min_minetest_version": self.min_rel and self.min_rel.as_dict(),
 			"max_minetest_version": self.max_rel and self.max_rel.as_dict(),
+			"size": self.file_size_bytes,
 		}
 
 	def as_long_dict(self):
@@ -1001,7 +1020,8 @@ class PackageRelease(db.Model):
 			"downloads": self.downloads,
 			"min_minetest_version": self.min_rel and self.min_rel.as_dict(),
 			"max_minetest_version": self.max_rel and self.max_rel.as_dict(),
-			"package": self.package.as_key_dict()
+			"package": self.package.as_key_dict(),
+			"size": self.file_size_bytes,
 		}
 
 	def get_edit_url(self):