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#[cfg(feature = "model")]
use reqwest::Client as ReqwestClient;
#[cfg(feature = "model")]
use crate::internal::prelude::*;
use crate::model::id::AttachmentId;
use crate::model::utils::is_false;
/// A file uploaded with a message. Not to be confused with [`Embed`]s.
///
/// [`Embed`]: super::Embed
#[derive(Clone, Debug, Deserialize, Serialize)]
#[non_exhaustive]
pub struct Attachment {
/// The unique ID given to this attachment.
pub id: AttachmentId,
/// The filename of the file that was uploaded. This is equivalent to what
/// the uploader had their file named.
pub filename: String,
/// If the attachment is an image, then the height of the image is provided.
pub height: Option<u64>,
/// The proxy URL.
pub proxy_url: String,
/// The size of the file in bytes.
pub size: u64,
/// The URL of the uploaded attachment.
pub url: String,
/// If the attachment is an image, then the width of the image is provided.
pub width: Option<u64>,
/// The attachment's [media type].
///
/// [media type]: https://en.wikipedia.org/wiki/Media_type
pub content_type: Option<String>,
/// Whether this attachment is ephemeral.
///
/// Ephemeral attachments will automatically be removed after a set period of time.
///
/// Ephemeral attachments on messages are guaranteed to be available as long as
/// the message itself exists.
#[serde(default, skip_serializing_if = "is_false")]
pub ephemeral: bool,
}
#[cfg(feature = "model")]
impl Attachment {
/// If this attachment is an image, then a tuple of the width and height
/// in pixels is returned.
#[must_use]
pub fn dimensions(&self) -> Option<(u64, u64)> {
self.width.and_then(|width| self.height.map(|height| (width, height)))
}
/// Downloads the attachment, returning back a vector of bytes.
///
/// # Examples
///
/// Download all of the attachments associated with a [`Message`]:
///
/// ```rust,no_run
/// # #[cfg(feature = "client")]
/// # async fn run() -> Result<(), Box<dyn std::error::Error>> {
/// use std::io::Write;
/// use std::path::Path;
///
/// use serenity::model::prelude::*;
/// use serenity::prelude::*;
/// use tokio::fs::File;
/// use tokio::io::AsyncWriteExt;
///
/// struct Handler;
///
/// #[serenity::async_trait]
/// impl EventHandler for Handler {
/// async fn message(&self, context: Context, mut message: Message) {
/// for attachment in message.attachments {
/// let content = match attachment.download().await {
/// Ok(content) => content,
/// Err(why) => {
/// println!("Error downloading attachment: {:?}", why);
/// let _ =
/// message.channel_id.say(&context, "Error downloading attachment").await;
///
/// return;
/// },
/// };
///
/// let mut file = match File::create(&attachment.filename).await {
/// Ok(file) => file,
/// Err(why) => {
/// println!("Error creating file: {:?}", why);
/// let _ = message.channel_id.say(&context, "Error creating file").await;
///
/// return;
/// },
/// };
///
/// if let Err(why) = file.write_all(&content).await {
/// println!("Error writing to file: {:?}", why);
///
/// return;
/// }
///
/// let _ = message
/// .channel_id
/// .say(&context, &format!("Saved {:?}", attachment.filename))
/// .await;
/// }
/// }
///
/// async fn ready(&self, _: Context, ready: Ready) {
/// println!("{} is connected!", ready.user.name);
/// }
/// }
/// let token = std::env::var("DISCORD_TOKEN")?;
/// let mut client =
/// Client::builder(&token, GatewayIntents::default()).event_handler(Handler).await?;
///
/// client.start().await?;
/// # Ok(())
/// # }
/// ```
///
/// # Errors
///
/// Returns an [`Error::Io`] when there is a problem reading the contents
/// of the HTTP response.
///
/// Returns an [`Error::Http`] when there is a problem retrieving the
/// attachment.
///
/// [`Message`]: super::Message
pub async fn download(&self) -> Result<Vec<u8>> {
let reqwest = ReqwestClient::new();
let bytes = reqwest.get(&self.url).send().await?.bytes().await?;
Ok(bytes.to_vec())
}
}