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use serde::{Deserialize, Serialize};
use zvariant::derive::Type;
use crate::{MessageField, MessageFieldCode};
// It's actually 10 (and even not that) but let's round it to next 8-byte alignment
const MAX_FIELDS_IN_MESSAGE: usize = 16;
/// A collection of [`MessageField`] instances.
///
/// [`MessageField`]: enum.MessageField.html
#[derive(Debug, Serialize, Deserialize, Type)]
pub struct MessageFields<'m>(#[serde(borrow)] Vec<MessageField<'m>>);
impl<'m> MessageFields<'m> {
/// Creates an empty collection of fields.
pub fn new() -> Self {
Self::default()
}
/// Appends a [`MessageField`] to the collection of fields in the message.
///
/// [`MessageField`]: enum.MessageField.html
pub fn add<'f: 'm>(&mut self, field: MessageField<'f>) {
self.0.push(field);
}
/// Returns a slice with all the [`MessageField`] in the message.
///
/// [`MessageField`]: enum.MessageField.html
pub fn get(&self) -> &[MessageField<'m>] {
&self.0
}
/// Gets a reference to a specific [`MessageField`] by its code.
///
/// Returns `None` if the message has no such field.
///
/// [`MessageField`]: enum.MessageField.html
pub fn get_field(&self, code: MessageFieldCode) -> Option<&MessageField<'m>> {
self.0.iter().find(|f| f.code() == code)
}
/// Consumes the `MessageFields` and returns a specific [`MessageField`] by its code.
///
/// Returns `None` if the message has no such field.
///
/// [`MessageField`]: enum.MessageField.html
pub fn into_field(self, code: MessageFieldCode) -> Option<MessageField<'m>> {
for field in self.0 {
if field.code() == code {
return Some(field);
}
}
None
}
}
impl<'m> Default for MessageFields<'m> {
fn default() -> Self {
Self(Vec::with_capacity(MAX_FIELDS_IN_MESSAGE))
}
}
impl<'m> std::ops::Deref for MessageFields<'m> {
type Target = [MessageField<'m>];
fn deref(&self) -> &Self::Target {
self.get()
}
}