Crate sparkle_impostor 

✨🥸 Sparkle Impostor

A third party crate for Twilight to execute Discord webhooks that clone an existing message

✨ Features

This has grown to be a more complicated (and painful) project than expected, so let me list what it does

Opt-in features for edge-cases:

• Clone attachments or stickers by linking to them or re-uploading them
• Clone URL components
• Clone messages sent after the original message, even combining them to reduce webhook executions
• Clone reactions
• Clone references by putting an embed
• Clone messages in a thread/forum post or messages used to start a thread/forum post
• Sanitize invalid usernames
• Delete the original message and messages sent after

General features:

• Replicate the author’s user or member avatar, embeds, anything possible
• Change any info about the new message, for example to clone to another channel
• Handle rate-limit retries
• Builder-pattern to keep your code clean
• Avoid clones and unnecessary deserialization
• Widely tested with integration tests (Almost 1:1 LOC for source and tests)

😋 A Taste of Sparkle Impostor

This also serves as the example, since it includes most of the API surface

let mut source = MessageSource::from_message(&message, &http)
    .expect("message really can't be cloned (voice message etc)");

// example error handling
if let Err(_) = source.check_component() {
    panic!("invalid components scare me");
}

let later_messages = source.later_messages_batched().await?;

// a lot of edge cases
source
    .webhook_name("custom modified exclusive webhook name".to_owned())
    .handle_attachment_link()?
    .handle_sticker_link()?
    .handle_reaction()
    .await?
    .handle_reference()?
    .handle_thread()
    .await?
    .sanitize_username("?", "????")
    .create()
    .await?
    .handle_thread_created()
    .await?;

for later_message in later_messages {
    // create every message sent later
    later_message?.create().await?;
}

📦 Cargo Features

• upload: Enables methods for re-uploading attachments

🙏 Feedback

Although widely tested, there may still be bugs, or you might have feature suggestions, please create issues for these!

🧪 Testing

The crate uses integration tests as opposed to unit tests to test real-world usage. It creates a message and clones it, then the tester checks if the message is cloned as expected

Before starting, set these environment variables, you can also put them in a .env file:

• BOT_TOKEN: The token of the bot to use for testing
• CHANNEL_ID: The channel in which the messages and webhooks will be crated
• FORUM_CHANNEL_ID: The forum channel in which cloning messages/threads in forum channels will be tested
• NOT_LAST_SOURCE_THREAD_ID: The bot will create a thread and spam to 200 in it the first time the tests are ran, to avoid doing this again, set this to the ID of this thread
• GUILD_EMOJI_ID: ID of an emoji that’s in the guild CHANNEL_ID is in

Required permissions in CHANNEL_ID and FORUM_CHANNEL_ID:

• VIEW_CHANNEL
• MANAGE_WEBHOOKS
• SEND_MESSAGES

Required additional permissions in FORUM_CHANNEL_ID:

• CREATE_POSTS
• SEND_MESSAGES_IN_POSTS

Test with a single thread to avoid race conditions: cargo test --all-features -- --test-threads=1

Modules

attachment_sticker

Handling the message having attachments or stickers

avatar

Handling the message’s avatar

component

Handling the message having components

error

The Error enum

later_messages

Handling the message not being the last one in the channel

reaction

Handling the message having reactions

reference

Handling the message having a reference

response

Wrapper types for Response

thread

Handling the message being in a thread

Structs

MessageSource

A message that can be cloned