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|
use std::str;
use std::sync::Mutex;
use datatype::{ChunkReceived, Event, DownloadComplete, UpdateRequestId, UpdateAvailable};
use super::services::{BackendServices, RemoteServices};
use super::transfers::Transfers;
/// Each `Parameter` implementation handles a specific kind of RVI client request,
/// optionally responding with an `Event` on completion.
pub trait Parameter {
fn handle(&self, remote: &Mutex<RemoteServices>, transfers: &Mutex<Transfers>)
-> Result<Option<Event>, String>;
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Notify {
update_available: UpdateAvailable,
services: BackendServices
}
impl Parameter for Notify {
fn handle(&self, remote: &Mutex<RemoteServices>, _: &Mutex<Transfers>) -> Result<Option<Event>, String> {
remote.lock().unwrap().backend = Some(self.services.clone());
Ok(Some(Event::NewUpdateAvailable(self.update_available.clone())))
}
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Start {
update_id: UpdateRequestId,
chunkscount: u64,
checksum: String
}
impl Parameter for Start {
fn handle(&self, remote: &Mutex<RemoteServices>, transfers: &Mutex<Transfers>) -> Result<Option<Event>, String> {
info!("Starting transfer for update_id {}", self.update_id);
let mut transfers = transfers.lock().unwrap();
transfers.push(self.update_id.clone(), self.checksum.clone());
let remote = remote.lock().unwrap();
let chunk = ChunkReceived {
device: remote.device_id.clone(),
update_id: self.update_id.clone(),
chunks: Vec::new()
};
remote.send_chunk_received(chunk)
.map(|_| None)
.map_err(|err| format!("error sending start ack: {}", err))
}
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Chunk {
update_id: UpdateRequestId,
bytes: String,
index: u64
}
impl Parameter for Chunk {
fn handle(&self, remote: &Mutex<RemoteServices>, transfers: &Mutex<Transfers>) -> Result<Option<Event>, String> {
let remote = remote.lock().unwrap();
let mut transfers = transfers.lock().unwrap();
let transfer = try!(transfers.get_mut(self.update_id.clone())
.ok_or(format!("couldn't find transfer for update_id {}", self.update_id)));
transfer.write_chunk(&self.bytes, self.index)
.map_err(|err| format!("couldn't write chunk: {}", err))
.and_then(|_| {
trace!("wrote chunk {} for package {}", self.index, self.update_id);
let chunk = ChunkReceived {
device: remote.device_id.clone(),
update_id: self.update_id.clone(),
chunks: transfer.transferred_chunks.clone(),
};
remote.send_chunk_received(chunk)
.map(|_| None)
.map_err(|err| format!("error sending ChunkReceived: {}", err))
})
}
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Finish {
update_id: UpdateRequestId,
signature: String
}
impl Parameter for Finish {
fn handle(&self, _: &Mutex<RemoteServices>, transfers: &Mutex<Transfers>) -> Result<Option<Event>, String> {
let mut transfers = transfers.lock().unwrap();
let image = {
let transfer = try!(transfers.get(self.update_id.clone())
.ok_or(format!("unknown package: {}", self.update_id)));
let package = try!(transfer.assemble_package()
.map_err(|err| format!("couldn't assemble package: {}", err)));
try!(package.into_os_string().into_string()
.map_err(|err| format!("couldn't get image: {:?}", err)))
};
transfers.remove(self.update_id.clone());
info!("Finished transfer of {}", self.update_id);
let complete = DownloadComplete {
update_id: self.update_id.clone(),
update_image: image,
signature: self.signature.clone()
};
Ok(Some(Event::DownloadComplete(complete)))
}
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Report;
impl Parameter for Report {
fn handle(&self, _: &Mutex<RemoteServices>, _: &Mutex<Transfers>) -> Result<Option<Event>, String> {
Ok(Some(Event::InstalledSoftwareNeeded))
}
}
#[derive(RustcDecodable, RustcEncodable)]
pub struct Abort;
impl Parameter for Abort {
fn handle(&self, _: &Mutex<RemoteServices>, transfers: &Mutex<Transfers>) -> Result<Option<Event>, String> {
transfers.lock().unwrap().clear();
Ok(None)
}
}
|
