summaryrefslogtreecommitdiffstats
path: root/adenosine-cli/src/identifiers.rs
blob: 8ea35b8938fd4baaef74b51ccbdf4b7aef150e9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
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 {
    Did(String, String),
    Host(String),
}

impl FromStr for DidOrHost {
    type Err = anyhow::Error;

    /// DID syntax is specified in: <https://w3c.github.io/did-core/#did-syntax>
    ///
    /// Lazy partial hostname regex, isn't very correct.
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        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<String>,
    pub record: Option<String>,
    pub fragment: Option<String>,
}

impl FromStr for AtUri {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        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());
    assert!(
        AtUri::from_str("at://did:plc:ltk4reuh7rkoy2frnueetpb5/app.bsky.follow/3jg23pbmlhc2a")
            .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()));
}

/// 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);
}