memed/bot/ext/utils/mousey.py

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2017-12-02 01:04:35 +00:00
import time
import asyncio
import functools
from typing import List
class Timer:
"""Context manager to measure how long the indented block takes to run."""
def __init__(self):
self.start = None
self.end = None
def __enter__(self):
self.start = time.perf_counter()
return self
async def __aenter__(self):
return self.__enter__()
def __exit__(self, exc_type, exc_val, exc_tb):
self.end = time.perf_counter()
async def __aexit__(self, exc_type, exc_val, exc_tb):
return self.__exit__(exc_type, exc_val, exc_tb)
def __str__(self):
return f'{self.duration:.3f}ms'
@property
def duration(self):
"""Duration in ms."""
return (self.end - self.start) * 1000
class Table:
def __init__(self, *column_titles: str):
self._rows = [column_titles]
self._widths = []
for index, entry in enumerate(column_titles):
self._widths.append(len(entry))
def _update_widths(self, row: tuple):
for index, entry in enumerate(row):
width = len(entry)
if width > self._widths[index]:
self._widths[index] = width
def add_row(self, *row: str):
"""
Add a row to the table.
.. note :: There's no check for the number of items entered, this may cause issues rendering if not correct.
"""
self._rows.append(row)
self._update_widths(row)
def add_rows(self, *rows: List[str]):
for row in rows:
self.add_row(*row)
def _render(self):
def draw_row(row_):
columns = []
for index, field in enumerate(row_):
# digits get aligned to the right
if field.isdigit():
columns.append(f" {field:>{self._widths[index]}} ")
continue
# regular text gets aligned to the left
columns.append(f" {field:<{self._widths[index]}} ")
return "|".join(columns)
# column title is centered in the middle of each field
title_row = "|".join(f" {field:^{self._widths[index]}} " for index, field in enumerate(self._rows[0]))
separator_row = "+".join("-" * (width + 2) for width in self._widths)
drawn = [title_row, separator_row]
# remove the title row from the rows
self._rows = self._rows[1:]
for row in self._rows:
row = draw_row(row)
drawn.append(row)
return "\n".join(drawn)
async def render(self, loop: asyncio.AbstractEventLoop=None):
"""Returns a rendered version of the table."""
loop = loop or asyncio.get_event_loop()
func = functools.partial(self._render)
return await loop.run_in_executor(None, func)