Struct EventId

pub struct EventId(/* private fields */);

A Matrix event ID.

An EventId is generated randomly or converted from a string slice, and can be converted back into a string as needed.

Room versions

Matrix specifies multiple room versions and the format of event identifiers differ between them. The original format used by room versions 1 and 2 uses a short pseudorandom “localpart” followed by the hostname and port of the originating homeserver. Later room versions change event identifiers to be a hash of the event encoded with Base64. Some of the methods provided by EventId are only relevant to the original event format.

// Original format
assert_eq!(<&EventId>::try_from("$h29iv0s8:example.com").unwrap(), "$h29iv0s8:example.com");
// Room version 3 format
assert_eq!(
    <&EventId>::try_from("$acR1l0raoZnm60CBwAVgqbZqoO/mYU81xysh1u7XcJk").unwrap(),
    "$acR1l0raoZnm60CBwAVgqbZqoO/mYU81xysh1u7XcJk"
);
// Room version 4 format
assert_eq!(
    <&EventId>::try_from("$Rqnc-F-dvnEYJTyHq_iKxU2bZ1CI92-kuZq3a5lr5Zg").unwrap(),
    "$Rqnc-F-dvnEYJTyHq_iKxU2bZ1CI92-kuZq3a5lr5Zg"
);

Implementations

impl EventId

pub fn as_str(&self) -> &str

Creates a string slice from this EventId.

pub fn as_bytes(&self) -> &[u8]

Creates a byte slice from this EventId.

impl EventId

pub fn parse(s: impl AsRef<str>) -> Result<OwnedEventId, IdParseError>

Try parsing a &str into an OwnedEventId.

The same can also be done using FromStr, TryFrom or TryInto. This function is simply more constrained and thus useful in generic contexts.

pub fn parse_box( s: impl AsRef<str> + Into<Box<str>>, ) -> Result<Box<Self>, IdParseError>

Try parsing a &str into a Box<EventId>.

The same can also be done using FromStr, TryFrom or TryInto. This function is simply more constrained and thus useful in generic contexts.

pub fn parse_rc( s: impl AsRef<str> + Into<Rc<str>>, ) -> Result<Rc<Self>, IdParseError>

Try parsing a &str into an Rc<EventId>.

pub fn parse_arc( s: impl AsRef<str> + Into<Arc<str>>, ) -> Result<Arc<Self>, IdParseError>

Try parsing a &str into an Arc<EventId>.

impl EventId

pub fn new(server_name: &ServerName) -> OwnedEventId

Available on crate feature rand only.

Attempts to generate an EventId for the given origin server with a localpart consisting of 18 random ASCII characters.

This should only be used for events in the original format as used by Matrix room versions 1 and 2.

pub fn localpart(&self) -> &str

Returns the event’s unique ID.

For the original event format as used by Matrix room versions 1 and 2, this is the “localpart” that precedes the homeserver. For later formats, this is the entire ID without the leading $ sigil.

pub fn server_name(&self) -> Option<&ServerName>

Returns the server name of the event ID.

Only applicable to events in the original format as used by Matrix room versions 1 and 2.

Trait Implementations

impl AsRef<[u8]> for Box<EventId>

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<[u8]> for EventId

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<EventId> for EventId

fn as_ref(&self) -> &EventId

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<EventId> for OwnedEventId

fn as_ref(&self) -> &EventId

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<str> for Box<EventId>

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<str> for EventId

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<EventId> for OwnedEventId

fn borrow(&self) -> &EventId

Immutably borrows from an owned value.

impl Clone for Box<EventId>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EventId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Box<EventId>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for EventId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&EventId> for Arc<EventId>

fn from(s: &EventId) -> Arc<EventId>

Converts to this type from the input type.

impl From<&EventId> for Box<EventId>

fn from(id: &EventId) -> Self

Converts to this type from the input type.

impl From<&EventId> for OwnedEventId

fn from(id: &EventId) -> OwnedEventId

Converts to this type from the input type.

impl From<&EventId> for Rc<EventId>

fn from(s: &EventId) -> Rc<EventId>

Converts to this type from the input type.

impl From<&EventId> for String

fn from(id: &EventId) -> Self

Converts to this type from the input type.

impl From<OwnedEventId> for Box<EventId>

fn from(a: OwnedEventId) -> Box<EventId>

Converts to this type from the input type.

impl FromStr for Box<EventId>

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for EventId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

impl Ord for EventId

fn cmp(&self, other: &EventId) -> Ordering

This method returns an Ordering between self and other.

impl PartialEq<&EventId> for Box<EventId>

fn eq(&self, other: &&EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<&EventId> for OwnedEventId

fn eq(&self, other: &&EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<&str> for Box<EventId>

fn eq(&self, other: &&str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<&str> for EventId

fn eq(&self, other: &&str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<Box<EventId>> for &EventId

fn eq(&self, other: &Box<EventId>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<Box<EventId>> for EventId

fn eq(&self, other: &Box<EventId>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<EventId> for &str

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<EventId> for Box<EventId>

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<EventId> for OwnedEventId

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<EventId> for String

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<EventId> for str

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<OwnedEventId> for &EventId

fn eq(&self, other: &OwnedEventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<OwnedEventId> for Box<EventId>

fn eq(&self, other: &OwnedEventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<OwnedEventId> for EventId

fn eq(&self, other: &OwnedEventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<String> for Box<EventId>

fn eq(&self, other: &String) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<String> for EventId

fn eq(&self, other: &String) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<str> for Box<EventId>

fn eq(&self, other: &str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<str> for EventId

fn eq(&self, other: &str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for EventId

fn eq(&self, other: &EventId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for EventId

fn partial_cmp(&self, other: &EventId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for EventId

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl ToOwned for EventId

type Owned = OwnedEventId

The resulting type after obtaining ownership.

fn to_owned(&self) -> Self::Owned

Creates owned data from borrowed data, usually by cloning.

fn clone_into(&self, target: &mut Self::Owned)

Uses borrowed data to replace owned data, usually by cloning.

impl<'a> TryFrom<&'a str> for &'a EventId

type Error = Error

The type returned in the event of a conversion error.

fn try_from(s: &'a str) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&str> for Box<EventId>

type Error = Error

The type returned in the event of a conversion error.

fn try_from(s: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<String> for Box<EventId>

type Error = Error

The type returned in the event of a conversion error.

fn try_from(s: String) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for EventId

impl StructuralPartialEq for EventId