use anyhow::{anyhow, Result}; use lazy_static::lazy_static; use regex::Regex; use std::fmt; use std::str::FromStr; #[derive(Debug, PartialEq, Eq, Clone)] pub enum DidOrHost { Did(String, String), Host(String), } impl FromStr for DidOrHost { type Err = anyhow::Error; /// DID syntax is specified in: /// /// Lazy partial hostname regex, isn't very correct. fn from_str(s: &str) -> Result { lazy_static! { static ref DID_RE: Regex = Regex::new(r"^did:([a-z]{1,64}):([a-zA-Z0-9\-.]{1,1024})$").unwrap(); } lazy_static! { static ref HOSTNAME_RE: Regex = Regex::new(r"^[A-Za-z][A-Za-z0-9-]*(\.[A-Za-z][A-Za-z0-9-]*)+$").unwrap(); } if let Some(caps) = DID_RE.captures(s) { Ok(Self::Did(caps[1].to_string(), caps[2].to_string())) } else if HOSTNAME_RE.is_match(s) { Ok(Self::Host(s.to_string())) } else { Err(anyhow!("does not match as a DID or hostname: {}", s)) } } } impl fmt::Display for DidOrHost { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { match self { Self::Host(v) => write!(f, "{}", v), Self::Did(m, v) => write!(f, "did:{}:{}", m, v), } } } #[test] fn test_didorhost() { assert_eq!( DidOrHost::from_str("hyde.test").unwrap(), DidOrHost::Host("hyde.test".to_string()) ); assert_eq!( DidOrHost::from_str("did:method:blah").unwrap(), DidOrHost::Did("method".to_string(), "blah".to_string()) ); assert!(DidOrHost::from_str("barestring").is_err()); assert!(DidOrHost::from_str("did:partial:").is_err()); assert!(DidOrHost::from_str("").is_err()); assert!(DidOrHost::from_str(" ").is_err()); assert!(DidOrHost::from_str("1234").is_err()); assert!(DidOrHost::from_str("mutli.part.domain").is_ok()); assert!(DidOrHost::from_str("did:is:weird").is_ok()); assert!(DidOrHost::from_str("did:plc:bv6ggog3tya2z3vxsub7hnal").is_ok()); } #[derive(Debug, PartialEq, Eq, Clone)] pub struct AtUri { pub repository: DidOrHost, pub collection: Option, pub record: Option, pub fragment: Option, } impl FromStr for AtUri { type Err = anyhow::Error; fn from_str(s: &str) -> Result { lazy_static! { static ref ATURI_RE: Regex = Regex::new(r"^at://([a-zA-Z0-9:_\.-]+)(/([a-zA-Z0-9\.]+))?(/([a-zA-Z0-9\.-]+))?(#([a-zA-Z0-9/-]+))?$").unwrap(); } if let Some(caps) = ATURI_RE.captures(s) { let uri = AtUri { repository: DidOrHost::from_str(&caps[1])?, collection: caps.get(3).map(|v| v.as_str().to_string()), record: caps.get(5).map(|v| v.as_str().to_string()), fragment: caps.get(7).map(|v| v.as_str().to_string()), }; Ok(uri) } else { Err(anyhow!("couldn't parse as an at:// URI: {}", s)) } } } impl fmt::Display for AtUri { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "at://{}", self.repository)?; if let Some(ref c) = self.collection { write!(f, "/{}", c)?; }; if let Some(ref r) = self.record { write!(f, "/{}", r)?; }; if let Some(ref v) = self.fragment { write!(f, "#{}", v)?; }; Ok(()) } } #[test] fn test_aturi() { assert!(AtUri::from_str("at://bob.com").is_ok()); assert!(AtUri::from_str("at://did:plc:bv6ggog3tya2z3vxsub7hnal").is_ok()); assert!(AtUri::from_str("at://bob.com/io.example.song").is_ok()); assert!(AtUri::from_str("at://bob.com/io.example.song/3yI5-c1z-cc2p-1a").is_ok()); assert!(AtUri::from_str("at://bob.com/io.example.song/3yI5-c1z-cc2p-1a#/title").is_ok()); let uri = AtUri { repository: DidOrHost::Did("some".to_string(), "thing".to_string()), collection: Some("com.atproto.record".to_string()), record: Some("asdf-123".to_string()), fragment: Some("/path".to_string()), }; assert_eq!( "at://did:some:thing/com.atproto.record/asdf-123#/path", uri.to_string() ); println!("{:?}", AtUri::from_str(&uri.to_string())); assert!(AtUri::from_str(&uri.to_string()).is_ok()); let uri = AtUri::from_str("at://bob.com/io.example.song/3yI5-c1z-cc2p-1a#/title").unwrap(); assert_eq!(uri.repository, DidOrHost::Host("bob.com".to_string())); assert_eq!(uri.collection, Some("io.example.song".to_string())); assert_eq!(uri.record, Some("3yI5-c1z-cc2p-1a".to_string())); assert_eq!(uri.fragment, Some("/title".to_string())); }