WebHost: add stats show cli command (#5995)

Usage: flask -A "WebHost:get_app()" stats show

Currently only shows sum and top10 biggest games packages.

WebHostLib/cli/__init__.py

@@ -0,0 +1,8 @@
+from flask import Flask
+
+
+class CLI:
+    def __init__(self, app: Flask) -> None:
+        from .stats import stats_cli
+
+        app.cli.add_command(stats_cli)

WebHostLib/cli/stats.py

@@ -0,0 +1,36 @@
+import click
+from flask.cli import AppGroup
+from pony.orm import raw_sql
+
+from Utils import format_SI_prefix
+
+stats_cli = AppGroup("stats")
+
+
+@stats_cli.command("show")
+def show() -> None:
+    from pony.orm import db_session, select
+
+    from WebHostLib.models import GameDataPackage
+
+    total_games_package_count: int = 0
+    total_games_package_size: int
+    top_10_package_sizes: list[tuple[int, str]] = []
+
+    with db_session:
+        data_length = raw_sql("LENGTH(data)")
+        data_length_desc = raw_sql("LENGTH(data) DESC")
+        data_length_sum = raw_sql("SUM(LENGTH(data))")
+        total_games_package_count = GameDataPackage.select().count()
+        total_games_package_size = select(data_length_sum for _ in GameDataPackage).first()  # type: ignore
+        top_10_package_sizes = list(
+            select((data_length, dp.checksum) for dp in GameDataPackage)  # type: ignore
+            .order_by(lambda _, _2: data_length_desc)
+            .limit(10)
+        )
+
+    click.echo(f"Total number of games packages: {total_games_package_count}")
+    click.echo(f"Total size of games packages:   {format_SI_prefix(total_games_package_size, power=1024)}B")
+    click.echo(f"Top {len(top_10_package_sizes)} biggest games packages:")
+    for size, checksum in top_10_package_sizes:
+        click.echo(f"    {checksum}: {size:>8d}")