a3e5d679a1
At the same time, this commit makes `ServerName` a newtype around str so other identifier types can borrow out their server name part as a `&ServerName`. This technique works for `ServerName` because it keeps no additional metadata. For the other identifier types to support being created in borrowed form from a string slice, custom DSTs first have to be added to Rust.
72 lines
2.1 KiB
Rust
72 lines
2.1 KiB
Rust
//! Endpoints for client devices to exchange information not persisted in room DAG.
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use std::{
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convert::TryFrom,
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fmt::{Display, Formatter, Result as FmtResult},
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};
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use ruma_identifiers::DeviceId;
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use serde::{
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de::{self, Unexpected},
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Deserialize, Deserializer, Serialize, Serializer,
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};
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pub mod send_event_to_device;
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/// Represents one or all of a user's devices.
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#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
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pub enum DeviceIdOrAllDevices {
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/// Represents a device Id for one of a user's devices.
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DeviceId(Box<DeviceId>),
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/// Represents all devices for a user.
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AllDevices,
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}
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impl Display for DeviceIdOrAllDevices {
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fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
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match self {
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DeviceIdOrAllDevices::DeviceId(device_id) => write!(f, "{}", device_id.to_string()),
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DeviceIdOrAllDevices::AllDevices => write!(f, "*"),
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}
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}
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}
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impl TryFrom<&str> for DeviceIdOrAllDevices {
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type Error = &'static str;
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fn try_from(device_id_or_all_devices: &str) -> Result<Self, Self::Error> {
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if device_id_or_all_devices.is_empty() {
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Err("Device identifier cannot be empty")
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} else if "*" == device_id_or_all_devices {
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Ok(DeviceIdOrAllDevices::AllDevices)
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} else {
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Ok(DeviceIdOrAllDevices::DeviceId(device_id_or_all_devices.into()))
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}
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}
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}
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impl Serialize for DeviceIdOrAllDevices {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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match self {
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Self::DeviceId(ref device_id) => serializer.serialize_str(&device_id),
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Self::AllDevices => serializer.serialize_str("*"),
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}
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}
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}
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impl<'de> Deserialize<'de> for DeviceIdOrAllDevices {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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let value = &String::deserialize(deserializer)?;
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DeviceIdOrAllDevices::try_from(&value[..]).map_err(|_| {
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de::Error::invalid_value(Unexpected::Str(&value), &"a valid device identifier or '*'")
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})
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}
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}
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