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|
use std::{
error::Error,
io::{Seek, Write},
};
use aws_sdk_s3::{
error::SdkError, operation::get_object::GetObjectError, primitives::ByteStream, Client,
};
use aws_smithy_types_convert::date_time::DateTimeExt;
use bytes::buf::Buf;
use futures::TryFutureExt;
use tempfile::tempfile;
use crate::{Entry, Index};
pub struct Access {
client: Client,
bucket: String,
}
impl Access {
pub fn new(client: Client, bucket: String) -> Self {
Self { client, bucket }
}
pub async fn fetch_index(&self) -> Result<(Index, Option<String>), Box<dyn Error>> {
let result = self
.client
.get_object()
.bucket(&self.bucket)
.key(".mp32rss/index.json")
.send()
.await;
match result {
Ok(obj) => {
let data = obj.body.collect().await?;
let index: Index = serde_json::from_reader(data.reader())?;
Ok((index, obj.e_tag))
}
Err(SdkError::ServiceError(ref e)) => {
if let GetObjectError::NoSuchKey(_) = e.err() {
Ok((Index::default(), None))
} else {
Err(Box::from(result.err().unwrap()))
}
}
_ => Err(Box::from(result.err().unwrap())),
}
}
pub async fn put_index(
&self,
index: &Index,
index_etag: Option<&str>,
) -> Result<Option<String>, Box<dyn Error>> {
let data = serde_json::to_string_pretty(index)?;
let mut builder = self
.client
.put_object()
.bucket(&self.bucket)
.key(".mp32rss/index.json")
.body(ByteStream::from(data.into_bytes()));
builder = if let Some(etag) = index_etag {
builder.if_match(etag)
} else {
builder.if_none_match('*')
};
let resp = builder.send().await?;
Ok(resp.e_tag)
}
pub async fn put_file(
&self,
key: &str,
content_type: &str,
data: String,
) -> Result<Option<String>, Box<dyn Error>> {
let resp = self
.client
.put_object()
.bucket(&self.bucket)
.key(key)
.content_type(content_type)
.body(ByteStream::from(data.into_bytes()))
.send()
.await?;
Ok(resp.e_tag)
}
pub async fn list_mp3s(&self) -> Result<Vec<String>, Box<dyn Error>> {
Ok(self
.client
.list_objects_v2()
.bucket(&self.bucket)
.into_paginator()
.send()
.try_collect()
.await?
.iter()
.flat_map(|resp| resp.contents())
.map(|obj| obj.key().expect("Missing key from s3 object").to_string())
.filter(|key| key.ends_with(".mp3"))
.collect())
}
pub async fn fetch_entry(&self, key: String) -> Result<Entry, Box<dyn Error>> {
let mut file = tempfile()?;
let mut obj = self
.client
.get_object()
.bucket(&self.bucket)
.key(&key)
.send()
.await?;
let mut size = 0;
while let Some(bytes) = obj.body.try_next().await? {
size += bytes.len() as i64;
file.write_all(&bytes)?;
}
file.rewind()?;
Entry::read_from(
key,
obj.e_tag,
size,
obj.last_modified
.and_then(|dt| dt.to_chrono_utc().ok())
.map(|dt| dt.date_naive()),
file,
)
}
pub async fn remove_file(&self, key: &str) -> Result<(), Box<dyn Error>> {
self.client
.delete_object()
.bucket(&self.bucket)
.key(key)
.send()
.map_ok(|_| ())
.map_err(Box::from)
.await
}
}
|
