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Fix #49. Introducing Telegram message length limit and trimming descriptions which exceed it.
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Alexey Skobkin 2023-06-29 00:39:05 +03:00
parent 20acceed8c
commit aedf80a4df
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1 changed files with 12 additions and 2 deletions
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telegram.py
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@ -108,6 +108,8 @@ class Notifier:
# https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this # https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this
BATCH_LIMIT: int = 25 BATCH_LIMIT: int = 25
# https://core.telegram.org/bots/api#sendmessage
MESSAGE_LENGTH_LIMIT: int = 4096
sent_counter: int = 0 sent_counter: int = 0
@ -167,12 +169,20 @@ class Notifier:
if item.date is not None: if item.date is not None:
date_string = item.date.strftime('%m.%d.%Y %H:%M') date_string = item.date.strftime('%m.%d.%Y %H:%M')
return ( header = (
f"<strong><a href=\"{item.url}\">{item.title}</a></strong>\n" f"<strong><a href=\"{item.url}\">{item.title}</a></strong>\n"
f"{date_string}\n\n" f"{date_string}\n\n"
f"{self.__sanitize_html(item.description)}"
) )
sanitized_description = self.__sanitize_html(item.description)
if len(sanitized_description) > (self.MESSAGE_LENGTH_LIMIT - len(header)):
cut = '<...>'
trim_index = self.MESSAGE_LENGTH_LIMIT - len(header) - len(cut) - 1
sanitized_description = sanitized_description[:trim_index] + cut
return header + sanitized_description
def __sanitize_html(self, html: str) -> str: def __sanitize_html(self, html: str) -> str:
if not html: if not html:
return '' return ''