ssi_vc/v1/data_model/
presentation.rs

1use iref::Uri;
2use ssi_claims_core::VerifiableClaims;
3
4use crate::v1::syntax::VERIFIABLE_PRESENTATION_TYPE;
5
6use super::Credential;
7
8/// Presentation trait.
9pub trait Presentation {
10    /// Verifiable credential type.
11    type Credential: Credential;
12
13    /// Identifier.
14    fn id(&self) -> Option<&Uri> {
15        None
16    }
17
18    /// Types, without the `VerifiablePresentation` type.
19    fn additional_types(&self) -> &[String] {
20        &[]
21    }
22
23    fn types(&self) -> PresentationTypes {
24        PresentationTypes {
25            base_type: true,
26            additional_types: self.additional_types().iter(),
27        }
28    }
29
30    fn verifiable_credentials(&self) -> &[Self::Credential] {
31        &[]
32    }
33
34    fn holder(&self) -> Option<&Uri> {
35        None
36    }
37}
38
39pub trait VerifiablePresentation: Presentation + VerifiableClaims {}
40
41impl<T: Presentation + VerifiableClaims> VerifiablePresentation for T {}
42
43pub struct PresentationTypes<'a> {
44    base_type: bool,
45    additional_types: std::slice::Iter<'a, String>,
46}
47
48impl<'a> PresentationTypes<'a> {
49    pub fn from_additional_types(additional_types: &'a [String]) -> Self {
50        Self {
51            base_type: true,
52            additional_types: additional_types.iter(),
53        }
54    }
55}
56
57impl<'a> Iterator for PresentationTypes<'a> {
58    type Item = &'a str;
59
60    fn next(&mut self) -> Option<Self::Item> {
61        if self.base_type {
62            self.base_type = false;
63            Some(VERIFIABLE_PRESENTATION_TYPE)
64        } else {
65            self.additional_types.next().map(String::as_str)
66        }
67    }
68}
ssi_vc/v1/data_model/presentation.rs

ssi_vc/v1/data_model/
presentation.rs
