feat(discord): add configurable bot message filtering

[MinaraAgent]

Summary

• Add discord_allow_bot_messages config option to allow receiving messages from other Discord bots
• This enables bot-to-bot communication scenarios (e.g., message forwarding between channels)
• Backward compatible: bot messages are still ignored by default

Usage

Set discord_allow_bot_messages: true in your Discord platform configuration.

Changes

• client.py: Modified on_message to check allow_bot_messages attribute before filtering bot messages
• discord_platform_adapter.py: Read discord_allow_bot_messages from config and set it on the client

Test Plan

• Test with discord_allow_bot_messages: false (default) - bot messages should be ignored
• Test with discord_allow_bot_messages: true - bot messages should be received
• Verify no regression in normal user message handling

🤖 Generated with Claude Code

Summary by Sourcery

New Features:

• Introduce a Discord configuration option to enable receiving messages from other bot accounts.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the Discord platform integration by providing a new configuration option to allow or disallow the processing of messages originating from other Discord bots. This change facilitates more complex bot interactions and communication patterns while maintaining backward compatibility by keeping the default behavior of ignoring bot messages.

Highlights

• Configurable Bot Message Filtering: Introduced a new configuration option, discord_allow_bot_messages, to control whether the bot processes messages from other Discord bots.
• Bot-to-Bot Communication: This feature enables scenarios requiring interaction between bots, such as message forwarding between channels.
• Backward Compatibility: The default behavior remains unchanged; bot messages are ignored unless explicitly enabled, ensuring no disruption to existing setups.

Changelog

• astrbot/core/platform/sources/discord/client.py
  • Updated the on_message handler to conditionally filter messages from bots based on the new allow_bot_messages attribute.
• astrbot/core/platform/sources/discord/discord_platform_adapter.py
  • Modified the adapter to read the discord_allow_bot_messages setting from the configuration and apply it to the Discord client instance.

Activity

• No human activity has occurred on this pull request yet.

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[sourcery-ai]

Hey - I've left some high level feedback:

• Instead of using setattr(self.client, "allow_bot_messages", allow_bot_messages), consider adding a typed attribute or constructor argument on DiscordBotClient so the option is discoverable and checked by static analysis.
• In on_message, you might early-return even faster by checking if message.author.bot and not getattr(self, "allow_bot_messages", False): directly, avoiding the extra local and keeping the logic compact.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Instead of using `setattr(self.client, "allow_bot_messages", allow_bot_messages)`, consider adding a typed attribute or constructor argument on `DiscordBotClient` so the option is discoverable and checked by static analysis.
- In `on_message`, you might early-return even faster by checking `if message.author.bot and not getattr(self, "allow_bot_messages", False):` directly, avoiding the extra local and keeping the logic compact.

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[gemini-code-assist]

Code Review

This pull request introduces a new configuration option discord_allow_bot_messages to control whether messages from other bots are processed. The implementation is correct and maintains backward compatibility. My review includes suggestions to improve code quality by making the new configuration an explicit parameter in the DiscordBotClient constructor, rather than setting it dynamically. This will enhance code clarity and maintainability.

[MinaraAgent]

Thank you for the review feedback! I've addressed all the suggestions:

1. ✅ Added allow_bot_messages as a typed constructor argument in DiscordBotClient
2. ✅ Simplified the on_message check to use self.allow_bot_messages directly
3. ✅ Updated the adapter to pass the parameter in constructor instead of using setattr

All changes have been pushed in commit aeff159.