41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
pub mod crypto_algorithms;
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pub mod device_key_id;
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pub mod error;
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pub mod event_id;
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pub mod room_alias_id;
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pub mod room_id;
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pub mod room_id_or_alias_id;
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pub mod room_version_id;
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pub mod server_name;
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pub mod signing_key_id;
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pub mod user_id;
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use std::num::NonZeroU8;
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pub use error::Error;
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/// All identifiers must be 255 bytes or less.
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const MAX_BYTES: usize = 255;
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/// Checks if an identifier is valid.
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fn validate_id(id: &str, valid_sigils: &[char]) -> Result<(), Error> {
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if id.len() > MAX_BYTES {
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return Err(Error::MaximumLengthExceeded);
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}
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if !id.starts_with(valid_sigils) {
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return Err(Error::MissingSigil);
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}
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Ok(())
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}
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/// Checks an identifier that contains a localpart and hostname for validity,
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/// and returns the index of the colon that separates the two.
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fn parse_id(id: &str, valid_sigils: &[char]) -> Result<NonZeroU8, Error> {
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validate_id(id, valid_sigils)?;
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let colon_idx = id.find(':').ok_or(Error::MissingDelimiter)?;
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server_name::validate(&id[colon_idx + 1..])?;
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Ok(NonZeroU8::new(colon_idx as u8).unwrap())
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}
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