Delete all messages with a specified URL (no read-only link!)

[DecentralizedDan]

Malicious bots will sometime spam every channel of a server with a spam link

• It can take time for an admin to go through every single channel deleting every instance of that link
• In the meantime, users are vulnerable to attack

Admins should be able to delete all instances of a selected URL

• It should be selected via "!command" OR right-clicking on the message, as a context menu option
• Every message with this URL should be deleted
• The message should not be reposted as a reply from Bouncer!
  • We do that with other malicious links for transparency, bc Bouncer can make mistakes
  • But this feature will be invoked by an admin, so we don't have "own" a mistake
  • New issue #75 should address transparency / accountability issues -- this action would trigger logging to a user-selected channel
  • The log should also mention the admin who invoked this action
• This action should also add the URL to the server's denylist
  • This should also be logged to the secure channel

There should be at least two ways to do this:

• By replying to the message with something like @bouncer delete
• Or with a slash command with the URL: !delete_url URL
  • There should be a confirmation message: "This will permanently delete every message by every user with this URL since Bouncer was invited to the channel. Type yes to confirm."
  • Bouncer will accept the word "yes" with any type of capitalization

Logging:

• This action will be logged client-side and in the logging channel
• The URL should be sent BE as a blocked URL