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-rw-r--r--adenosine-cli/src/identifiers.rs234
1 files changed, 234 insertions, 0 deletions
diff --git a/adenosine-cli/src/identifiers.rs b/adenosine-cli/src/identifiers.rs
index 7f88df5..8ea35b8 100644
--- a/adenosine-cli/src/identifiers.rs
+++ b/adenosine-cli/src/identifiers.rs
@@ -2,7 +2,9 @@ use anyhow::{anyhow, Result};
use lazy_static::lazy_static;
use regex::Regex;
use std::fmt;
+use std::ops::Deref;
use std::str::FromStr;
+use std::time::SystemTime;
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum DidOrHost {
@@ -142,3 +144,235 @@ fn test_aturi() {
assert_eq!(uri.record, Some("3yI5-c1z-cc2p-1a".to_string()));
assert_eq!(uri.fragment, Some("/title".to_string()));
}
+
+/// A String (newtype) representing an NSID
+pub struct Nsid(String);
+
+impl FromStr for Nsid {
+ type Err = anyhow::Error;
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ lazy_static! {
+ static ref NSID_RE: Regex = Regex::new(r"^([a-z][a-z0-9-]+\.)+[a-zA-Z0-9-]+$").unwrap();
+ }
+ if NSID_RE.is_match(s) {
+ Ok(Self(s.to_string()))
+ } else {
+ Err(anyhow!("does not match as an NSID: {}", s))
+ }
+ }
+}
+
+impl Deref for Nsid {
+ type Target = str;
+
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl Nsid {
+ pub fn domain(&self) -> String {
+ self.rsplit(".")
+ .skip(1)
+ .collect::<Vec<&str>>()
+ .join(".")
+ .to_string()
+ }
+
+ pub fn name(&self) -> String {
+ self.split(".")
+ .last()
+ .expect("multiple segments in NSID")
+ .to_string()
+ }
+}
+
+impl fmt::Display for Nsid {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "{}", self.0)
+ }
+}
+
+#[test]
+fn test_nsid() {
+ assert!(Nsid::from_str("com.atproto.recordType").is_ok());
+
+ let nsid = Nsid::from_str("com.atproto.recordType").unwrap();
+ assert_eq!(nsid.domain(), "atproto.com".to_string());
+}
+
+pub struct Did(String);
+
+impl FromStr for Did {
+ type Err = anyhow::Error;
+
+ /// DID syntax is specified in: <https://w3c.github.io/did-core/#did-syntax>
+ ///
+ /// This regex does not follow that definition exactly.
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ lazy_static! {
+ static ref DID_RE: Regex =
+ Regex::new(r"^did:([a-z]{1,32}):([a-zA-Z0-9\-.]{1,256})$").unwrap();
+ }
+ if DID_RE.is_match(s) {
+ Ok(Self(s.to_string()))
+ } else {
+ Err(anyhow!("does not match as a DID: {}", s))
+ }
+ }
+}
+
+impl Deref for Did {
+ type Target = str;
+
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl Did {
+ pub fn did_type(&self) -> String {
+ self.split(":").nth(1).unwrap().to_string()
+ }
+}
+
+impl fmt::Display for Did {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "{}", self.0)
+ }
+}
+
+#[test]
+fn test_did() {
+ assert!(Did::from_str("did:web:asdf.org").is_ok());
+ assert!(Did::from_str("did:plc:asdf").is_ok());
+
+ assert!(Did::from_str("bob.com").is_err());
+ assert!(Did::from_str("").is_err());
+ assert!(Did::from_str("did:").is_err());
+ assert!(Did::from_str("did:plc:").is_err());
+ assert!(Did::from_str("plc:asdf").is_err());
+ assert!(Did::from_str("DID:thing:thang").is_err());
+
+ assert_eq!(
+ Did::from_str("did:web:asdf.org").unwrap().did_type(),
+ "web".to_string()
+ );
+}
+
+lazy_static! {
+ /// Sortable base32 encoding, as bluesky implements/defines
+ static ref BASE32SORT: data_encoding::Encoding = {
+ let mut spec = data_encoding::Specification::new();
+ spec.symbols.push_str("234567abcdefghijklmnopqrstuvwxyz");
+ spec.padding = None;
+ spec.encoding().unwrap()
+ };
+}
+
+/// A string identifier representing a UNIX time in miliseconds, plus a small counter
+///
+/// Pretty permissive about what can be parsed/accepted, because there were some old TIDs floating
+/// around with weird format.
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Tid(String);
+
+impl FromStr for Tid {
+ type Err = anyhow::Error;
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ lazy_static! {
+ static ref TID_RE: Regex = Regex::new(r"^[0-9a-zA-Z-]{13,20}$").unwrap();
+ }
+ if TID_RE.is_match(s) {
+ Ok(Self(s.to_string()))
+ } else {
+ Err(anyhow!("does not match as a TID: {}", s))
+ }
+ }
+}
+
+impl Deref for Tid {
+ type Target = str;
+
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl fmt::Display for Tid {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "{}", self.0)
+ }
+}
+
+impl Tid {
+ /// Bluesky does not specify, but assuming u64 math here
+ pub fn new(millis: u64, count: u64, clock_id: u8) -> Self {
+ let val = millis * 1000 + count;
+ Tid(format!(
+ "{}{}",
+ BASE32SORT.encode(&val.to_le_bytes()),
+ BASE32SORT.encode(&[clock_id]),
+ ))
+ }
+}
+
+#[test]
+fn test_tid() {
+ Tid::from_str("3yI5-c1z-cc2p-1a").unwrap();
+ assert!(Tid::from_str("3jg6anbimrc2a").is_ok());
+ assert!(Tid::from_str("3yI5-c1z-cc2p-1a").is_ok());
+
+ Tid::from_str("asdf234as4asdf234").unwrap();
+ assert!(Tid::from_str("asdf234as4asdf234").is_ok());
+
+ assert!(Tid::from_str("").is_err());
+ assert!(Tid::from_str("com").is_err());
+ assert!(Tid::from_str("com.blah.Thing").is_err());
+ assert!(Tid::from_str("did:stuff:blah").is_err());
+}
+
+pub struct TidLord {
+ last_timestamp: u64,
+ last_counter: u64,
+ clock_id: u8,
+}
+
+impl TidLord {
+ pub fn new() -> Self {
+ Self {
+ last_timestamp: 0,
+ last_counter: 0,
+ // just 5 bits (?)
+ clock_id: rand::random::<u8>() & 0x1F,
+ }
+ }
+
+ pub fn next(&mut self) -> Tid {
+ let now = SystemTime::now()
+ .duration_since(SystemTime::UNIX_EPOCH)
+ .unwrap()
+ .as_millis() as u64;
+ if now > self.last_timestamp {
+ self.last_timestamp = now;
+ self.last_counter = 0;
+ } else {
+ self.last_counter += 1;
+ }
+ Tid::new(self.last_timestamp, self.last_counter, self.clock_id)
+ }
+}
+
+#[test]
+fn test_tid_lord() {
+ let mut time_lord = TidLord::new();
+ let mut prev = time_lord.next();
+ for _ in [0..100] {
+ assert!(time_lord.next() > prev);
+ prev = time_lord.next();
+ }
+ assert_eq!(prev, Tid::from_str(&prev.to_string()).unwrap());
+ println!("{}", prev);
+}