open-geocode 0.1.0

Lightweight geocoding engine: build a binary Pack from OSM extracts and serve search, autocomplete, and reverse geocoding from a single Rust runtime.
Documentation 
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//! Global 404 / 405 fallbacks rendered as Problem Details (ADR 0017
//! Decisions 27 and 37).
//!
//! Unknown paths return 404 and disallowed methods return 405, both as
//! `application/problem+json` rather than an empty body or a static-file 404.

use axum::{
    Extension,
    response::{IntoResponse, Response},
};

use crate::http::{problem::Problem, request_id::RequestId};

/// Router fallback for unmatched paths (Decision 37).
pub(crate) async fn not_found(request_id: Option<Extension<RequestId>>) -> Response {
    attach_id(Problem::not_found(), request_id)
}

/// Router `method_not_allowed_fallback` for matched paths with a disallowed
/// method (Decision 27). This is a global fallback and cannot see the matched
/// route, so it advertises the common case `Allow: GET`; the basemap route also
/// accepts HEAD, but the demo's clients never probe it with other methods.
pub(crate) async fn method_not_allowed(request_id: Option<Extension<RequestId>>) -> Response {
    attach_id(Problem::method_not_allowed("GET"), request_id)
}

fn attach_id(problem: Problem, request_id: Option<Extension<RequestId>>) -> Response {
    match request_id {
        Some(Extension(RequestId(id))) => problem.with_request_id(id),
        None => problem,
    }
    .into_response()
}