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macro_rules! implement_pagination_v1 {
($t:ty) => {
impl $t {
async fn follow_link(
client: &Client,
url: &str,
) -> Result<Self, error::Error> {
let res = reqwest::Client::new()
.get(url)
.header("Authorization", client.auth_header())
.send()
.await
.map_err(error::Error::Request)?;
match res.status() {
reqwest::StatusCode::OK => {
let body =
res.text()
.await
.map_err(error::Error::BodyRead)?;
let response: Self =
serde_json::from_str(&body)
.map_err(error::Error::Json)?;
Ok(response)
},
_ => {
let body =
res.text()
.await
.map_err(error::Error::BodyRead)?;
let error: error::ErrorResponse =
serde_json::from_str(&body)
.map_err(error::Error::Json)?;
Err(error::Error::Api(error))
}
}
}
/// Follows the link to the next page, returns None of the next
/// page does not exist.
pub async fn next(
&self,
client: &Client,
) -> Option<Result<Self, error::Error>> {
match
self
.links
.next
.as_ref()
.map(|url| Self::follow_link(client, &url)) {
Some(data) => Some(data.await),
None => None,
}
}
/// Follows the link to the previous page, returns None of the
/// previous page does not exist.
pub async fn prev(
&self, client: &Client,
) -> Option<Result<Self, error::Error>> {
match
self
.links
.prev
.as_ref()
.map(|url| Self::follow_link(client, &url)) {
Some(data) => Some(data.await),
None => None,
}
}
}
}
}