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//! `GET /_matrix/media/*/preview_url`
//!
//! Get a preview for a URL.
pub mod v3 {
//! `/v3/` ([spec])
//!
//! [spec]: https://spec.matrix.org/v1.4/client-server-api/#get_matrixmediav3preview_url
use ruma_common::{
api::{request, response, Metadata},
metadata, MilliSecondsSinceUnixEpoch,
};
use serde::Serialize;
use serde_json::value::{to_raw_value as to_raw_json_value, RawValue as RawJsonValue};
const METADATA: Metadata = metadata! {
method: GET,
rate_limited: true,
authentication: AccessToken,
history: {
1.0 => "/_matrix/media/r0/preview_url",
1.1 => "/_matrix/media/v3/preview_url",
}
};
/// Request type for the `get_media_preview` endpoint.
#[request(error = crate::Error)]
pub struct Request {
/// URL to get a preview of.
#[ruma_api(query)]
pub url: String,
/// Preferred point in time (in milliseconds) to return a preview for.
#[ruma_api(query)]
pub ts: MilliSecondsSinceUnixEpoch,
}
/// Response type for the `get_media_preview` endpoint.
#[response(error = crate::Error)]
#[derive(Default)]
pub struct Response {
/// OpenGraph-like data for the URL.
///
/// Differences from OpenGraph: the image size in bytes is added to the `matrix:image:size`
/// field, and `og:image` returns the MXC URI to the image, if any.
#[ruma_api(body)]
pub data: Option<Box<RawJsonValue>>,
}
impl Request {
/// Creates a new `Request` with the given url and timestamp.
pub fn new(url: String, ts: MilliSecondsSinceUnixEpoch) -> Self {
Self { url, ts }
}
}
impl Response {
/// Creates an empty `Response`.
pub fn new() -> Self {
Self { data: None }
}
/// Creates a new `Response` with the given OpenGraph data (in a
/// `serde_json::value::RawValue`).
pub fn from_raw_value(data: Box<RawJsonValue>) -> Self {
Self { data: Some(data) }
}
/// Creates a new `Response` with the given OpenGraph data (in any kind of serializable
/// object).
pub fn from_serialize<T: Serialize>(data: &T) -> serde_json::Result<Self> {
Ok(Self { data: Some(to_raw_json_value(data)?) })
}
}
#[cfg(test)]
mod tests {
use assert_matches::assert_matches;
use serde_json::{
from_value as from_json_value, json,
value::{to_raw_value as to_raw_json_value, RawValue as RawJsonValue},
};
// Since BTreeMap<String, Box<RawJsonValue>> deserialization doesn't seem to
// work, test that Option<RawJsonValue> works
#[test]
fn raw_json_deserialize() {
type OptRawJson = Option<Box<RawJsonValue>>;
assert_matches!(from_json_value::<OptRawJson>(json!(null)).unwrap(), None);
from_json_value::<OptRawJson>(json!("test")).unwrap().unwrap();
from_json_value::<OptRawJson>(json!({ "a": "b" })).unwrap().unwrap();
}
// For completeness sake, make sure serialization works too
#[test]
fn raw_json_serialize() {
to_raw_json_value(&json!(null)).unwrap();
to_raw_json_value(&json!("string")).unwrap();
to_raw_json_value(&json!({})).unwrap();
to_raw_json_value(&json!({ "a": "b" })).unwrap();
}
}
}