109 lines
2.4 KiB
Rust
109 lines
2.4 KiB
Rust
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use serde::{Serialize, Deserialize};
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use std::fmt;
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macro_rules! tagtype {
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($name:ident: $tag:literal) => {
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#[derive(Clone, Copy, Default, Debug)]
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pub struct $name;
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impl Serialize for $name {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: serde::Serializer,
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{
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serializer.serialize_str($tag)
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}
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}
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impl<'de> Deserialize<'de> for $name {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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struct Visitor;
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impl serde::de::Visitor<'_> for Visitor {
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type Value = $name;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "tag type {:?}", $tag)
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}
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fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
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where
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E: serde::de::Error,
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{
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if v != $tag {
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return Err(E::invalid_value(serde::de::Unexpected::Str(v), &$tag));
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}
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Ok($name)
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}
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}
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deserializer.deserialize_str(Visitor)
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}
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}
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};
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}
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tagtype!(TagFeatureCollection: "FeatureCollection");
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct FeatureCollection {
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pub r#type: TagFeatureCollection,
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pub features: Vec<Feature>,
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}
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tagtype!(TagFeature: "Feature");
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct Feature {
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pub r#type: TagFeature,
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pub id: String,
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pub properties: FeatureProperties,
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pub geometry: Geometry,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct FeatureProperties {
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pub name: String,
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}
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#[derive(Clone, Debug, Serialize, Deserialize)]
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#[serde(tag = "type")]
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pub enum Geometry {
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Polygon {
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coordinates: PolygonData,
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},
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MultiPolygon {
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coordinates: Vec<PolygonData>,
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},
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}
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// first list of points is outer "hull" (should be clockwise), remaining list of points are holes (counterclockwise)
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#[derive(Clone, Debug, Serialize, Deserialize)]
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pub struct PolygonData(pub Vec<Vec<Position>>);
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#[derive(Clone, Copy, Debug)]
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pub struct Position {
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pub longitude: f32,
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pub latitude: f32,
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}
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impl Serialize for Position {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: serde::Serializer,
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{
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(self.longitude, self.latitude).serialize(serializer)
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}
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}
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impl<'de> Deserialize<'de> for Position {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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<(f32, f32)>::deserialize(deserializer).map(|(longitude, latitude)| Position { longitude, latitude })
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}
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}
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