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use super::Scope;

/// Create a new [`Authenticator`] instance.
#[derive(Debug, Default)]
pub struct Builder {
    pub(crate) scopes: Option<Vec<Scope>>,
    pub(crate) name: String,
    pub(crate) note: String,
}

impl Builder {
    /// Create a new instance.
    pub fn new(name: String) -> Self {
        let note = format!("A token created for {}.", &name);

        Self {
            name,
            note,
            ..Default::default()
        }
    }

    /// Set a custom note for the token stored on GitHub. Defaults to mentioning
    /// the token name.
    pub fn note(mut self, note: String) -> Self {
        self.note = note;
        self
    }

    /// Add a scope. [Read more.](https://developer.github.com/apps/building-oauth-apps/understanding-scopes-for-oauth-apps/)
    pub fn scope(mut self, scope: Scope) -> Self {
        if let None = self.scopes {
            self.scopes = Some(vec![]);
        }

        if let Some(ref mut scopes) = &mut self.scopes {
            scopes.push(scope);
        }

        self
    }

    /// Finalize the builder, and return an `Authenticator` instance.
    pub fn build(self) -> crate::Authenticator {
        crate::Authenticator { config: self }
    }
}