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use super::{error::SourceError, Fetch};
use crate::{
entry::Entry,
sink::message::{Media, Message},
};
use async_trait::async_trait;
use egg_mode::{
auth::bearer_token,
entities::MediaType,
tweet::{user_timeline, Timeline},
KeyPair, Token,
};
pub struct Twitter {
timeline: Option<Timeline>,
handle: String,
auth: Auth,
}
enum Auth {
NotAuthenticated { api_key: String, api_secret: String },
Authenticated(Token),
}
#[allow(missing_docs)] #[derive(thiserror::Error, Debug)]
pub enum TwitterError {
#[error("Authentication failed")]
Auth(#[source] egg_mode::error::Error),
#[error(transparent)]
Other(#[from] egg_mode::error::Error),
}
impl Twitter {
#[must_use]
pub fn new(handle: String, api_key: String, api_secret: String) -> Self {
Self {
timeline: None,
handle,
auth: Auth::NotAuthenticated {
api_key,
api_secret,
},
}
}
}
#[async_trait]
impl Fetch for Twitter {
async fn fetch(&mut self) -> Result<Vec<Entry>, SourceError> {
self.fetch_impl().await.map_err(Into::into)
}
}
impl Twitter {
async fn fetch_impl(&mut self) -> Result<Vec<Entry>, TwitterError> {
tracing::debug!("Getting tweets");
let token = match &self.auth {
Auth::NotAuthenticated {
api_key,
api_secret,
} => {
let token = bearer_token(&KeyPair::new(api_key.clone(), api_secret.clone()))
.await
.map_err(TwitterError::Auth)?;
self.auth = Auth::Authenticated(token);
let Auth::Authenticated(auth) = &self.auth else {
unreachable!("it has just been put there, this couldn't happen");
};
auth
}
Auth::Authenticated(token) => token,
};
let (timeline, tweets) = match &self.timeline {
None => {
user_timeline(self.handle.clone(), true, true, token)
.start()
.await?
}
Some(_) => {
self.timeline
.take()
.expect("shouldn't be None, just matched Some")
.newer(None)
.await?
}
};
self.timeline = Some(timeline);
tracing::debug!("Got {num} tweets", num = tweets.len());
let messages = tweets
.iter()
.map(|tweet| {
Entry {
id: Some(tweet.id.to_string().into()),
reply_to: tweet.in_reply_to_status_id.map(|i| i.to_string().into()),
msg: Message {
body: Some(tweet.text.clone()),
link: Some(
format!(
"https://twitter.com/{handle}/status/{id}",
handle = self.handle,
id = tweet.id
)
.as_str()
.try_into()
.expect("The URL is hand crafted and should always be valid"),
),
media: tweet.entities.media.as_ref().and_then(|x| {
x.iter()
.map(|x| match x.media_type {
MediaType::Photo => {
Some(Media::Photo(x.media_url.as_str().try_into().expect("The tweet URL provided by the Tweeter API should always be a valid URL")))
}
MediaType::Video => {
Some(Media::Video(x.media_url.as_str().try_into().expect("The tweet URL provided by the Tweeter API should always be a valid URL")))
}
MediaType::Gif => None,
})
.collect::<Option<Vec<Media>>>()
}),
..Default::default()
},
..Default::default()
}
})
.collect::<Vec<_>>();
let unread_num = messages.len();
if unread_num > 0 {
tracing::debug!("Got {unread_num} unread filtered tweets");
} else {
tracing::debug!("All tweets have already been read, none remaining to send");
}
Ok(messages)
}
}
impl std::fmt::Debug for Twitter {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Twitter")
.field("handle", &self.handle)
.finish_non_exhaustive()
}
}