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use super::{Photo, Video};
use is_macro::Is;
use serde::{
ser::{SerializeSeq, Serializer},
Serialize,
};
#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash, Is)]
#[non_exhaustive]
#[must_use]
pub enum GroupMedia<'a> {
Photo(Photo<'a>),
Video(Video<'a>),
}
struct WithIndex<'a> {
media: GroupMedia<'a>,
index: usize,
}
#[derive(Debug, PartialEq, Eq, Clone, Hash)]
pub(crate) struct Album<'a>(pub &'a [GroupMedia<'a>]);
impl GroupMedia<'_> {
fn serialize<S>(
&self,
serializer: S,
index: usize,
) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
match self {
GroupMedia::Photo(photo) => {
let name = format!("photo_{}", index);
photo.serialize(serializer, &name)
}
GroupMedia::Video(video) => {
let video_name = format!("video_{}", index);
let thumb_name = format!("thumb_{}", index);
video.serialize(serializer, &video_name, &thumb_name)
}
}
}
}
impl<'a> From<Photo<'a>> for GroupMedia<'a> {
fn from(photo: Photo<'a>) -> Self {
GroupMedia::Photo(photo)
}
}
impl<'a> From<Video<'a>> for GroupMedia<'a> {
fn from(video: Video<'a>) -> Self {
GroupMedia::Video(video)
}
}
impl<'a> Serialize for Album<'a> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut seq = serializer.serialize_seq(Some(self.0.len()))?;
for (index, media) in self.0.iter().enumerate() {
let with_index = WithIndex {
media: *media,
index,
};
seq.serialize_element(&with_index)?;
}
seq.end()
}
}
impl<'a> Serialize for WithIndex<'a> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.media.serialize(serializer, self.index)
}
}