performance: add performance monitor

files/helpers/const.py

@@ -108,6 +108,10 @@ FEATURES = {
 
 PERMS = {
 	"DEBUG_LOGIN_TO_OTHERS": 3,
+	'PERFORMANCE_KILL_PROCESS': 3,
+	'PERFORMANCE_SCALE_UP_DOWN': 3,
+	'PERFORMANCE_RELOAD': 3,
+	'PERFORMANCE_STATS': 3,
 	"POST_COMMENT_MODERATION": 2,
 	"USER_SHADOWBAN": 2,
 }

files/helpers/jinja2.py

@@ -9,6 +9,9 @@ from .get import *
 from .const import * 
 from files.helpers.assetcache import assetcache_path
 
+@app.template_filter("computer_size")
+def computer_size(size_bytes:int) -> str:
+	return f'{size_bytes // 1024 // 1024} MiB'
 
 @app.template_filter("shuffle")
 @pass_context

files/helpers/time.py

@@ -0,0 +1,24 @@
+import time
+from datetime import datetime
+from typing import Final, Union
+
+DATE_FORMAT: Final[str] = '%Y %B %d'
+DATETIME_FORMAT: Final[str] = '%Y %B %d %H:%M:%S UTC'
+
+TimestampFormattable = Union[int, float, datetime, time.struct_time]
+
+def format_datetime(timestamp:TimestampFormattable) -> str:
+	return _format_timestamp(timestamp, DATETIME_FORMAT)
+
+def format_date(timestamp:TimestampFormattable) -> str:
+	return _format_timestamp(timestamp, DATE_FORMAT)
+
+def _format_timestamp(timestamp:TimestampFormattable, format:str) -> str:
+	if isinstance(timestamp, datetime):
+		return timestamp.strftime(format)
+	elif isinstance(timestamp, (int, float)):
+		timestamp = time.gmtime(timestamp)
+	elif not isinstance(timestamp, time.struct_time):
+		raise TypeError("Invalid argument type (must be one of int, float, "
+						"datettime, or struct_time)")
+	return time.strftime(format, timestamp)