twinstar 0.4.0

Gemini server implementation (previously called "northstar")
Documentation 
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use std::convert::TryInto;
use std::borrow::Borrow;

use anyhow::*;
use uriparse::URIReference;
use crate::types::{ResponseHeader, Body, Mime, Document};
use crate::util::Cowy;
use crate::GEMINI_MIME;

pub struct Response {
    header: ResponseHeader,
    body: Option<Body>,
}

impl Response {
    pub const fn new(header: ResponseHeader) -> Self {
        Self {
            header,
            body: None,
        }
    }

    #[deprecated(
        since = "0.4.0",
        note = "Deprecated in favor of Response::success_gemini() or Document::into()"
    )]
    pub fn document(document: impl Borrow<Document>) -> Self {
        Self::success_gemini(document)
    }

    pub fn input(prompt: impl Cowy<str>) -> Result<Self> {
        let header = ResponseHeader::input(prompt)?;
        Ok(Self::new(header))
    }

    pub fn input_lossy(prompt: impl Cowy<str>) -> Self {
        let header = ResponseHeader::input_lossy(prompt);
        Self::new(header)
    }

    pub fn redirect_temporary_lossy<'a>(location: impl TryInto<URIReference<'a>>) -> Self {
        let header = ResponseHeader::redirect_temporary_lossy(location);
        Self::new(header)
    }

    /// Create a successful response with a given body and MIME
    pub fn success(mime: &Mime, body: impl Into<Body>) -> Self {
        Self {
            header: ResponseHeader::success(mime),
            body: Some(body.into()),
        }
    }

    /// Create a successful response with a `text/gemini` MIME
    pub fn success_gemini(body: impl Into<Body>) -> Self {
        Self::success(&GEMINI_MIME, body)
    }

    /// Create a successful response with a `text/plain` MIME
    pub fn success_plain(body: impl Into<Body>) -> Self {
        Self::success(&mime::TEXT_PLAIN, body)
    }

    pub fn server_error(reason: impl Cowy<str>) -> Result<Self>  {
        let header = ResponseHeader::server_error(reason)?;
        Ok(Self::new(header))
    }

    pub fn not_found() -> Self {
        let header = ResponseHeader::not_found();
        Self::new(header)
    }

    pub fn bad_request_lossy(reason: impl Cowy<str>) -> Self {
        let header = ResponseHeader::bad_request_lossy(reason);
        Self::new(header)
    }

    pub fn client_certificate_required() -> Self {
        let header = ResponseHeader::client_certificate_required();
        Self::new(header)
    }

    pub fn certificate_not_authorized() -> Self {
        let header = ResponseHeader::certificate_not_authorized();
        Self::new(header)
    }

    pub fn with_body(mut self, body: impl Into<Body>) -> Self {
        self.body = Some(body.into());
        self
    }

    pub const fn header(&self) -> &ResponseHeader {
        &self.header
    }

    pub fn take_body(&mut self) -> Option<Body> {
        self.body.take()
    }
}

impl<D: Borrow<Document>> From<D> for Response {
    fn from(doc: D) -> Self {
        Self::success_gemini(doc)
    }
}