core-invoice 1.0.0

EN 16931 + Peppol PINT semantic model (VAT, GST, SST, consumption tax)
Documentation 
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use std::fmt;

/// Identifier.Type: content + optional scheme + optional scheme version.
/// Lists are profile-scoped; this type does not require EAS.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct Identifier {
    pub value: String,
    pub scheme: Option<String>,
    pub scheme_version: Option<String>,
}

impl Identifier {
    pub fn new(value: impl Into<String>) -> Self {
        Self {
            value: value.into(),
            scheme: None,
            scheme_version: None,
        }
    }

    pub fn schemed(value: impl Into<String>, scheme: impl Into<String>) -> Self {
        Self {
            value: value.into(),
            scheme: Some(scheme.into()),
            scheme_version: None,
        }
    }

    pub fn with_version(
        value: impl Into<String>,
        scheme: impl Into<String>,
        version: impl Into<String>,
    ) -> Self {
        Self {
            value: value.into(),
            scheme: Some(scheme.into()),
            scheme_version: Some(version.into()),
        }
    }
}

/// Document reference (PO, contract, preceding invoice id). No scheme.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct DocumentReference(pub String);

impl DocumentReference {
    pub fn new(value: impl Into<String>) -> Self {
        Self(value.into())
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }
}

impl fmt::Display for DocumentReference {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        self.0.fmt(f)
    }
}