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Identities for entities did.bot
agent llm did
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5.9 kB · 169 lines
Rust
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170//! Reading one atom: the scopes it names, and the warnings its form carries.
use std::collections::BTreeSet;
use crate::include::is_service_reference;use crate::parse::{split_kind, Syntax};use crate::scope::ANY_AUD;use crate::{ Action, ActionSet, MimePattern, NsidPattern, Scope, ScopeParseError, ScopeWarning, Transition, MAX_ATOM_BYTES,};
/// One atom, read.#[derive(Debug, Clone, PartialEq, Eq)]pub struct Read { /// The scopes the atom names: one, or one for each collection or method /// it lists. pub scopes: Vec<Scope>, /// How the atom's form departs from the permission spec's. Empty for a /// spec form. pub warnings: Vec<ScopeWarning>,}
/// Reads one atom, such as `repo:app.bsky.feed.post?action=create`.pub(crate) fn read(atom: &str) -> Result<Read, ScopeParseError> { if atom.is_empty() { return Err(ScopeParseError::Empty); } if atom.len() > MAX_ATOM_BYTES { return Err(ScopeParseError::AtomTooLong(atom.len())); } if let Some(c) = atom .chars() .find(|c| !matches!(c, '\x21' | '\x23'..='\x5B' | '\x5D'..='\x7E')) { return Err(ScopeParseError::ForbiddenCharacter(c)); } if atom == "atproto" { return Ok(Read { scopes: vec![Scope::Atproto], warnings: Vec::new(), }); } let Some((kind, rest)) = split_kind(atom) else { return Err(ScopeParseError::UnknownKind(atom.to_owned())); }; let reader: fn(&str, &mut Syntax<'_>) -> Result<Vec<Scope>, ScopeParseError> = match kind { "transition" => { return Ok(Read { scopes: vec![Scope::Transition(Transition::parse(rest)?)], warnings: Vec::new(), }) } "repo" => repo, "rpc" => rpc, "blob" => |atom, syntax| Ok(vec![blob(atom, syntax)?]), "include" => |atom, syntax| Ok(vec![include(atom, syntax)?]), "account" => |atom, syntax| Ok(vec![crate::account::read(atom, syntax)?]), "identity" => |atom, syntax| Ok(vec![crate::identity::read(atom, syntax)?]), other => return Err(ScopeParseError::UnknownKind(other.to_owned())), }; let mut syntax = Syntax::split(atom, kind)?; let scopes = reader(atom, &mut syntax)?; Ok(Read { scopes, warnings: syntax.finish(), })}
/// `repo:`: one scope for each collection, each with the atom's actions.fn repo(atom: &str, syntax: &mut Syntax<'_>) -> Result<Vec<Scope>, ScopeParseError> { let collections = syntax.list("collection", true); if collections.is_empty() { return Err(ScopeParseError::MissingValue(atom.to_owned())); } let actions = actions(syntax)?; collections .iter() .map(|collection| { Ok(Scope::Repo { collection: nsid(collection, syntax)?, actions: actions.clone(), }) }) .collect()}
/// `repo:`'s `action`s. None given is every action.fn actions(syntax: &mut Syntax<'_>) -> Result<ActionSet, ScopeParseError> { let values = syntax.list("action", false); if values.is_empty() { return Ok(ActionSet::All); } let mut actions = BTreeSet::new(); for value in &values { if value.contains(',') { syntax.warn(ScopeWarning::ActionList); } for word in value.split(',') { let action = Action::parse(word)?; if action == Action::Manage { syntax.warn(ScopeWarning::RepoManage); } actions.insert(action); } } Ok(ActionSet::Only(actions))}
/// `rpc:`: one scope for each method, each at the atom's audience.fn rpc(atom: &str, syntax: &mut Syntax<'_>) -> Result<Vec<Scope>, ScopeParseError> { let methods = syntax.list("lxm", true); if methods.is_empty() { return Err(ScopeParseError::MissingValue(atom.to_owned())); } let aud = syntax.single("aud", false); match aud.as_deref() { None => syntax.warn(ScopeWarning::NoAudience), Some(aud) if aud == ANY_AUD || is_service_reference(aud) => {} Some(aud) => syntax.warn(ScopeWarning::NotAServiceReference(aud.to_owned())), } let every_audience = aud.as_deref().is_none_or(|aud| aud == ANY_AUD); methods .iter() .map(|method| { let method = nsid(method, syntax)?; if method == NsidPattern::Any && every_audience { syntax.warn(ScopeWarning::EveryMethodAndAudience); } Ok(Scope::Rpc { method, aud: aud.clone(), }) }) .collect()}
/// A `repo:` collection or an `rpc:` method.fn nsid(value: &str, syntax: &mut Syntax<'_>) -> Result<NsidPattern, ScopeParseError> { let pattern = NsidPattern::parse(value)?; if matches!(pattern, NsidPattern::Prefix(_)) { syntax.warn(ScopeWarning::PartialWildcard(value.to_owned())); } Ok(pattern)}
/// `blob:`: one scope accepting every type the atom names.fn blob(atom: &str, syntax: &mut Syntax<'_>) -> Result<Scope, ScopeParseError> { let accept = syntax.list("accept", true); if accept.is_empty() { return Err(ScopeParseError::MissingValue(atom.to_owned())); } let accept = accept .iter() .map(|mime| MimePattern::parse(mime)) .collect::<Result<_, _>>()?; Ok(Scope::blob(accept))}
/// `include:`: the set's name, and the audience its permissions may take./// Whether either names anything is [`crate::Include::new`]'s to say.fn include(atom: &str, syntax: &mut Syntax<'_>) -> Result<Scope, ScopeParseError> { let nsid = syntax .single("nsid", true) .filter(|nsid| !nsid.is_empty()) .ok_or_else(|| ScopeParseError::MissingValue(atom.to_owned()))?; let aud = syntax.single("aud", false); Ok(Scope::Include { nsid, aud })}