little_hyper/
query.rs

1use std::collections::HashMap;
2
3/// Query
4///
5///
6/// ```fn my_path(Query(path): Query<MyStruct>) { }```
7// #[derive(Debug)]
8// pub struct Query<T>(T);
9
10// #[allow(unused)]
11// impl<T> Extractor<T> for Query<T> {
12//     fn inner(&self) -> &T {
13//         &self.0
14//     }
15// }
16
17pub const QUERY_START_WITH: &str = "?";
18pub const QUERY_SEP: &str = "&";
19pub const QUERY_VALUE_SEP: &str = "=";
20
21#[derive(Default, Debug)]
22pub struct QueryData(HashMap<String, String>);
23
24impl QueryData {
25    pub fn get(&self, key: &str) -> Option<&String> {
26        self.0.get(key)
27    }
28    pub fn set(&mut self, key: &str, value: &str) {
29        self.0.insert(key.to_string(), value.to_string());
30    }
31    pub fn len(&self) -> usize {
32        self.0.len()
33    }
34}
35
36impl From<&str> for QueryData {
37    fn from(value: &str) -> Self {
38        value.split(QUERY_SEP).filter(|item| !item.is_empty()).fold(
39            QueryData::default(),
40            |mut query_data, item| {
41                let (key, value) = item.split_once(QUERY_VALUE_SEP).unwrap_or((&item, &""));
42
43                query_data.set(key, value);
44
45                query_data
46            },
47        )
48    }
49}
50
51#[cfg(test)]
52mod tests {
53    use super::*;
54
55    #[test]
56    fn test_from_query_data() {
57        let query_one = QueryData::from("type=admin");
58
59        assert!(query_one
60            .get("type")
61            .and_then(|i| Some(i == "admin"))
62            .is_some());
63
64        let query_two = QueryData::from("a=1&b=2");
65
66        assert!(query_two.get("a").and_then(|i| Some(i == "1")).is_some());
67        assert!(query_two.get("b").and_then(|i| Some(i == "2")).is_some());
68
69        let query_three = QueryData::from("a&b&c=3");
70
71        assert!(query_three.get("a").and_then(|i| Some(i == "")).is_some());
72        assert!(query_three.get("b").and_then(|i| Some(i == "")).is_some());
73        assert!(query_three.get("b").and_then(|i| Some(i == "2")).is_some());
74    }
75}
little_hyper/query.rs

little_hyper/
query.rs
