A lexicon-driven AppView for ATProto.
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#[cfg(test)]mod integration_tests;
use crate::error::AppError;use std::fmt;
/// A parsed `at://` URI for addressing permissioned data.////// Full form: `at://<space-did>/space/<space-type-nsid>/<skey>/<user-did>/<collection-nsid>/<rkey>`/// Space-only form: `at://<space-did>/space/<space-type-nsid>/<skey>`#[derive(Debug, Clone, PartialEq, Eq, Hash)]pub struct SpaceUri { pub did: String, pub type_nsid: String, pub skey: String, pub user_did: Option<String>, pub collection: Option<String>, pub rkey: Option<String>,}
impl SpaceUri { pub fn parse(uri: &str) -> Result<Self, AppError> { // Rewrite legacy ats:// URIs (ats://did/type/skey) to at://did/space/type/skey let normalized; let stripped = if let Some(ats_rest) = uri.strip_prefix("ats://") { let ats_parts: Vec<&str> = ats_rest.split('/').collect(); if ats_parts.len() >= 3 { normalized = format!("at://{}/space/{}", ats_parts[0], ats_parts[1..].join("/")); normalized .strip_prefix("at://") .expect("just constructed with at:// prefix") } else { return Err(AppError::BadRequest( "ats:// URI requires at least did/type/skey".into(), )); } } else { uri.strip_prefix("at://") .ok_or_else(|| AppError::BadRequest("SpaceUri must start with at://".into()))? };
let parts: Vec<&str> = stripped.split('/').collect();
// Must have at least: did/space/type_nsid/skey (4 segments) if parts.len() < 4 { return Err(AppError::BadRequest( "SpaceUri requires at least did/space/type_nsid/skey".into(), )); }
if parts[1] != "space" { return Err(AppError::BadRequest( "SpaceUri must have 'space' as the second path segment".into(), )); }
if parts[0].is_empty() || parts[2].is_empty() || parts[3].is_empty() { return Err(AppError::BadRequest( "SpaceUri components must not be empty".into(), )); }
let did = parts[0].to_string(); let type_nsid = parts[2].to_string(); let skey = parts[3].to_string();
let (user_did, collection, rkey) = if parts.len() == 7 { if parts[4].is_empty() || parts[5].is_empty() || parts[6].is_empty() { return Err(AppError::BadRequest( "SpaceUri record components must not be empty".into(), )); } ( Some(parts[4].to_string()), Some(parts[5].to_string()), Some(parts[6].to_string()), ) } else if parts.len() == 4 { (None, None, None) } else { return Err(AppError::BadRequest( "SpaceUri must have 4 components (space) or 7 components (record)".into(), )); };
Ok(SpaceUri { did, type_nsid, skey, user_did, collection, rkey, }) }
pub fn space_uri(&self) -> String { format!("at://{}/space/{}/{}", self.did, self.type_nsid, self.skey) }
pub fn is_record_uri(&self) -> bool { self.user_did.is_some() }
pub fn is_space_uri(&self) -> bool { self.user_did.is_none() }}
impl fmt::Display for SpaceUri { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!( f, "at://{}/space/{}/{}", self.did, self.type_nsid, self.skey )?; if let (Some(user), Some(col), Some(rkey)) = (&self.user_did, &self.collection, &self.rkey) { write!(f, "/{}/{}/{}", user, col, rkey)?; } Ok(()) }}
#[cfg(test)]mod tests { use super::*;
#[test] fn parse_space_uri() { let uri = SpaceUri::parse("at://did:plc:abc123/space/com.example.forum/main").unwrap(); assert_eq!(uri.did, "did:plc:abc123"); assert_eq!(uri.type_nsid, "com.example.forum"); assert_eq!(uri.skey, "main"); assert!(uri.is_space_uri()); assert!(!uri.is_record_uri()); assert_eq!(uri.user_did, None); }
#[test] fn parse_record_uri() { let uri = SpaceUri::parse( "at://did:plc:abc123/space/com.example.forum/main/did:plc:user1/com.example.forum.post/3k2abc", ) .unwrap(); assert_eq!(uri.did, "did:plc:abc123"); assert_eq!(uri.type_nsid, "com.example.forum"); assert_eq!(uri.skey, "main"); assert_eq!(uri.user_did.as_deref(), Some("did:plc:user1")); assert_eq!(uri.collection.as_deref(), Some("com.example.forum.post")); assert_eq!(uri.rkey.as_deref(), Some("3k2abc")); assert!(uri.is_record_uri()); assert!(!uri.is_space_uri()); }
#[test] fn display_space_uri() { let uri = SpaceUri { did: "did:plc:abc123".into(), type_nsid: "com.example.forum".into(), skey: "main".into(), user_did: None, collection: None, rkey: None, }; assert_eq!( uri.to_string(), "at://did:plc:abc123/space/com.example.forum/main" ); }
#[test] fn display_record_uri() { let uri = SpaceUri { did: "did:plc:abc123".into(), type_nsid: "com.example.forum".into(), skey: "main".into(), user_did: Some("did:plc:user1".into()), collection: Some("com.example.forum.post".into()), rkey: Some("3k2abc".into()), }; assert_eq!( uri.to_string(), "at://did:plc:abc123/space/com.example.forum/main/did:plc:user1/com.example.forum.post/3k2abc" ); }
#[test] fn space_uri_extracts_space_part() { let uri = SpaceUri::parse( "at://did:plc:abc123/space/com.example.forum/main/did:plc:user1/com.example.forum.post/3k2abc", ) .unwrap(); assert_eq!( uri.space_uri(), "at://did:plc:abc123/space/com.example.forum/main" ); }
#[test] fn rewrite_ats_space_uri() { let uri = SpaceUri::parse("ats://did:plc:abc123/com.example.forum/main").unwrap(); assert_eq!(uri.did, "did:plc:abc123"); assert_eq!(uri.type_nsid, "com.example.forum"); assert_eq!(uri.skey, "main"); assert!(uri.is_space_uri()); assert_eq!( uri.to_string(), "at://did:plc:abc123/space/com.example.forum/main" ); }
#[test] fn rewrite_ats_record_uri() { let uri = SpaceUri::parse( "ats://did:plc:abc123/com.example.forum/main/did:plc:user1/com.example.forum.post/3k2abc", ) .unwrap(); assert_eq!(uri.did, "did:plc:abc123"); assert_eq!(uri.type_nsid, "com.example.forum"); assert_eq!(uri.skey, "main"); assert_eq!(uri.user_did.as_deref(), Some("did:plc:user1")); assert!(uri.is_record_uri()); }
#[test] fn reject_ats_too_few_segments() { let result = SpaceUri::parse("ats://did:plc:abc123/com.example.forum"); assert!(result.is_err()); }
#[test] fn reject_missing_space_segment() { let result = SpaceUri::parse("at://did:plc:abc123/com.example.forum/main"); assert!(result.is_err()); }
#[test] fn reject_too_few_components() { let result = SpaceUri::parse("at://did:plc:abc123/space/com.example.forum"); assert!(result.is_err()); }
#[test] fn reject_wrong_component_count() { let result = SpaceUri::parse("at://did:plc:abc123/space/com.example.forum/main/did:plc:user1"); assert!(result.is_err()); }
#[test] fn reject_empty_components() { let result = SpaceUri::parse("at:///space/com.example.forum/main"); assert!(result.is_err()); }
#[test] fn roundtrip_parse_display() { let original = "at://did:plc:abc123/space/com.example.forum/main"; let uri = SpaceUri::parse(original).unwrap(); assert_eq!(uri.to_string(), original);
let original_record = "at://did:plc:abc123/space/com.example.forum/main/did:plc:user1/com.example.forum.post/3k2abc"; let uri = SpaceUri::parse(original_record).unwrap(); assert_eq!(uri.to_string(), original_record); }}