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//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
use winnow::combinator::repeat_till;
use winnow::Bytes;
use winnow::Parser;
use crate::v5::properties::define_properties;
use crate::v5::strings::parse_string;
use crate::v5::strings::write_string;
use crate::v5::variable_header::PacketIdentifier;
use crate::v5::variable_header::SubscriptionIdentifier;
use crate::v5::variable_header::UserProperties;
use crate::v5::write::WResult;
use crate::v5::write::WriteMqttPacket;
use crate::v5::MResult;
define_properties! {
packet_type: MUnsubscribe,
anker: "_Toc3901182",
pub struct UnsubscribeProperties<'i> {
(anker: "_Toc3901183")
subscription_identifier: SubscriptionIdentifier,
(anker: "_Toc3901183")
user_properties: UserProperties<'i>,
}
}
pub struct Unsubscriptions<'i> {
start: &'i [u8],
}
impl<'i> core::fmt::Debug for Unsubscriptions<'i> {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
f.debug_struct("Unsubscriptions").finish()
}
}
impl<'i> Unsubscriptions<'i> {
fn parse(input: &mut &'i Bytes) -> MResult<Unsubscriptions<'i>> {
winnow::combinator::trace("Unsubscriptions", |input: &mut &'i Bytes| {
let start = repeat_till::<_, _, (), _, _, _, _>(
1..,
Unsubscription::parse,
winnow::combinator::eof,
)
.recognize()
.parse_next(input)?;
Ok(Unsubscriptions { start })
})
.parse_next(input)
}
pub async fn write<W: WriteMqttPacket>(&self, buffer: &mut W) -> WResult<W> {
for unsub in self.iter() {
unsub.write(buffer).await?;
}
Ok(())
}
pub fn iter(&self) -> UnsubscriptionsIter<'i> {
UnsubscriptionsIter {
current: Bytes::new(self.start),
}
}
}
#[allow(missing_debug_implementations)]
pub struct UnsubscriptionsIter<'i> {
current: &'i Bytes,
}
impl<'i> Iterator for UnsubscriptionsIter<'i> {
type Item = Unsubscription<'i>;
fn next(&mut self) -> Option<Self::Item> {
if !self.current.is_empty() {
let sub = Unsubscription::parse(&mut self.current)
.expect("Already parsed subscriptions should be valid");
return Some(sub);
}
None
}
}
#[derive(Debug)]
pub struct Unsubscription<'i> {
pub topic_filter: &'i str,
}
impl<'i> Unsubscription<'i> {
fn parse(input: &mut &'i Bytes) -> MResult<Self> {
winnow::combinator::trace("Unsubscription", |input: &mut &'i Bytes| {
let topic_filter = parse_string(input)?;
Ok(Unsubscription { topic_filter })
})
.parse_next(input)
}
pub async fn write<W: WriteMqttPacket>(&self, buffer: &mut W) -> WResult<W> {
write_string(buffer, self.topic_filter).await
}
}
#[derive(Debug)]
#[doc = crate::v5::util::md_speclink!("_Toc3901179")]
pub struct MUnsubscribe<'i> {
pub packet_identifier: PacketIdentifier,
pub properties: UnsubscribeProperties<'i>,
pub unsubscriptions: Unsubscriptions<'i>,
}
impl<'i> MUnsubscribe<'i> {
pub fn parse(input: &mut &'i Bytes) -> MResult<Self> {
winnow::combinator::trace("MUnsubscribe", |input: &mut &'i Bytes| {
let (packet_identifier, properties, unsubscriptions) = (
PacketIdentifier::parse,
UnsubscribeProperties::parse,
Unsubscriptions::parse,
)
.parse_next(input)?;
Ok(MUnsubscribe {
packet_identifier,
properties,
unsubscriptions,
})
})
.parse_next(input)
}
pub async fn write<W: WriteMqttPacket>(&self, buffer: &mut W) -> WResult<W> {
self.packet_identifier.write(buffer).await?;
self.properties.write(buffer).await?;
self.unsubscriptions.write(buffer).await
}
}
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