1 use serde::Deserialize;
2 use std::fs::File;
3
4 #[derive(Debug, Deserialize)]
5 struct Feature {
6 location: Location,
7 name: String,
8 }
9
10 #[derive(Debug, Deserialize)]
11 struct Location {
12 latitude: i32,
13 longitude: i32,
14 }
15
16 #[allow(dead_code)]
load() -> Vec<crate::routeguide::Feature>17 pub fn load() -> Vec<crate::routeguide::Feature> {
18 let data_dir = std::path::PathBuf::from_iter([std::env!("CARGO_MANIFEST_DIR"), "data"]);
19 let file = File::open(data_dir.join("route_guide_db.json")).expect("failed to open data file");
20
21 let decoded: Vec<Feature> =
22 serde_json::from_reader(&file).expect("failed to deserialize features");
23
24 decoded
25 .into_iter()
26 .map(|feature| crate::routeguide::Feature {
27 name: feature.name,
28 location: Some(crate::routeguide::Point {
29 longitude: feature.location.longitude,
30 latitude: feature.location.latitude,
31 }),
32 })
33 .collect()
34 }
35