Add release download size to API and web interface

app/flatpages/help/api.md

@@ -212,6 +212,7 @@ Supported query parameters:
         * `downloads`: number of downloads
         * `min_minetest_version`: dict or null, minimum supported minetest version (inclusive).
         * `max_minetest_version`: dict or null, minimum supported minetest version (inclusive).
+        * `size`: size of zip file, in bytes.
         * `package`
             * `author`: author username
             * `name`: technical name

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):

app/templates/macros/releases.html

@@ -38,6 +38,9 @@
 						[MT ≤{{ rel.max_rel.name }}]
 					{% endif %}
 				</span>
+				<span class="text-muted ms-1">
+					{{ rel.file_size }}
+				</span>
 				<br />
 				<small style="color:#999;">
 					{% if rel.commit_hash %}
@@ -79,6 +82,10 @@
 				{% endif %}
 			</span>
 
+			<span class="text-muted ms-1">
+				{{ rel.file_size }}
+			</span>
+
 			<br>
 
 			<small style="color:#999;">

app/templates/packages/view.html

@@ -39,6 +39,7 @@
 				href="{{ release.get_download_url() }}">
 			<div>
 				{{ _("Download") }}
+				<span class="text-muted">({{ release.file_size }})</span>
 			</div>
 
 			{% if release and (release.min_rel or release.max_rel) %}