aldrin-parser 0.13.0

Aldrin schema parser library.
Documentation 
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use super::{Error, ErrorKind};
use crate::ast::Ident;
use crate::diag::{Diagnostic, DiagnosticKind, Renderer};
use crate::validate::Validate;
use crate::{util, Parser};

#[derive(Debug)]
pub(crate) struct MissingImport {
    schema_name: String,
    extern_schema: Ident,
    candidate: Option<String>,
}

impl MissingImport {
    pub(crate) fn validate(schema_name: &Ident, validate: &mut Validate) {
        let schema = validate.get_current_schema();
        for import in schema.imports() {
            if import.schema_name().value() == schema_name.value() {
                return;
            }
        }

        let candidates = schema.imports().iter().map(|i| i.schema_name().value());
        let candidate = util::did_you_mean(candidates, schema_name.value()).map(ToOwned::to_owned);

        validate.add_error(Self {
            schema_name: validate.schema_name().to_owned(),
            extern_schema: schema_name.clone(),
            candidate,
        });
    }
}

impl Diagnostic for MissingImport {
    fn kind(&self) -> DiagnosticKind {
        DiagnosticKind::Error
    }

    fn schema_name(&self) -> &str {
        &self.schema_name
    }

    fn render(&self, renderer: &Renderer, parser: &Parser) -> String {
        let mut report = renderer.error(format!("missing import `{}`", self.extern_schema.value()));

        if let Some(schema) = parser.get_schema(&self.schema_name) {
            report = report.snippet(
                schema,
                self.extern_schema.span(),
                format!("schema `{}` used here", self.extern_schema.value()),
            );
        }

        let msg = match self.candidate {
            Some(ref candidate) => format!("did you mean `{candidate}`?"),
            None => format!("add `import {};` at the top", self.extern_schema.value()),
        };

        report = report.help(msg);
        report.render()
    }
}

impl From<MissingImport> for Error {
    fn from(e: MissingImport) -> Self {
        Self {
            kind: ErrorKind::MissingImport(e),
        }
    }
}