59 lines
1.5 KiB
Rust
59 lines
1.5 KiB
Rust
use base64::Engine;
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#[derive(Clone, Copy)]
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pub enum UriClass {
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Actor,
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Object,
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Activity,
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}
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impl AsRef<str> for UriClass {
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fn as_ref(&self) -> &str {
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match self {
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Self::Actor => "actors",
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Self::Object => "objects",
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Self::Activity => "activities",
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}
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}
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}
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/// unpack uri in id if valid, otherwise compose full uri with "{base}/{entity}/{id}"
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pub fn uri(base: &str, entity: UriClass, id: &str) -> String {
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if id.starts_with("https://") || id.starts_with("http://") {
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return id.to_string();
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}
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if id.starts_with('+') { // ready-to-use base64-encoded id
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if let Some(expanded) = expand(id) {
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return expanded;
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}
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}
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format!("{}/{}/{}", base, entity.as_ref(), id)
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}
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/// decompose local id constructed by uri() fn
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pub fn decompose(full_id: &str) -> String {
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full_id // https://example.org/actors/test/followers/page?offset=42
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.replace("https://", "")
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.replace("http://", "")
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.split('/') // ['example.org', 'actors', 'test', 'followers', 'page?offset=42' ]
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.nth(2) // 'test'
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.unwrap_or("")
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.to_string()
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}
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pub fn expand(uri: &str) -> Option<String> {
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if let Ok(bytes) = base64::prelude::BASE64_URL_SAFE_NO_PAD.decode(uri.replacen('+', "", 1)) {
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if let Ok(uri) = std::str::from_utf8(&bytes) {
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return Some(uri.to_string());
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}
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}
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None
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}
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/// encode with base64 remote url and prefix it with +
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pub fn compact(uri: &str) -> String {
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let encoded = base64::prelude::BASE64_URL_SAFE_NO_PAD.encode(uri.as_bytes());
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format!("+{encoded}")
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}
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