geozero 0.15.1

Zero-Copy reading and writing of geospatial data in WKT/WKB, GeoJSON, MVT, GDAL, and other formats.
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use crate::{
    ColumnValue, CoordDimensions, FeatureProcessor, GeomProcessor, PropertyProcessor, error::Result,
};

/// Wraps another [`FeatureProcessor`], first transforming coordinates.
pub struct WrappedXYProcessor<T, F: Fn(&mut f64, &mut f64)> {
    /// The underlying FeatureProcessor
    pub inner: T,
    pre_process_xy: F,
}

impl<T, F: Fn(&mut f64, &mut f64)> WrappedXYProcessor<T, F> {
    /// Wraps an inner [`FeatureProcessor`], calling `transform_coordinates` on [GeomProcessor::xy]
    /// and [GeomProcessor::coordinate] first. The function takes and returns `(x, y)`.
    pub fn new(inner: T, pre_process_xy: F) -> Self {
        Self {
            inner,
            pre_process_xy,
        }
    }

    pub fn into_inner(self) -> T {
        self.inner
    }
}

// The trait has many default implementations, but every single call must be specified here to
// delegate
impl<T: GeomProcessor, F: Fn(&mut f64, &mut f64)> GeomProcessor for WrappedXYProcessor<T, F> {
    fn dimensions(&self) -> CoordDimensions {
        self.inner.dimensions()
    }
    fn multi_dim(&self) -> bool {
        self.inner.multi_dim()
    }
    fn srid(&mut self, srid: Option<i32>) -> Result<()> {
        self.inner.srid(srid)
    }
    fn xy(&mut self, mut x: f64, mut y: f64, idx: usize) -> Result<()> {
        (self.pre_process_xy)(&mut x, &mut y);
        self.inner.xy(x, y, idx)
    }
    fn coordinate(
        &mut self,
        mut x: f64,
        mut y: f64,
        z: Option<f64>,
        m: Option<f64>,
        t: Option<f64>,
        tm: Option<u64>,
        idx: usize,
    ) -> Result<()> {
        (self.pre_process_xy)(&mut x, &mut y);
        self.inner.coordinate(x, y, z, m, t, tm, idx)
    }
    fn empty_point(&mut self, idx: usize) -> Result<()> {
        self.inner.empty_point(idx)
    }
    fn point_begin(&mut self, idx: usize) -> Result<()> {
        self.inner.point_begin(idx)
    }
    fn point_end(&mut self, idx: usize) -> Result<()> {
        self.inner.point_end(idx)
    }
    fn multipoint_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.multipoint_begin(size, idx)
    }
    fn multipoint_end(&mut self, idx: usize) -> Result<()> {
        self.inner.multipoint_end(idx)
    }
    fn linestring_begin(&mut self, tagged: bool, size: usize, idx: usize) -> Result<()> {
        self.inner.linestring_begin(tagged, size, idx)
    }
    fn linestring_end(&mut self, tagged: bool, idx: usize) -> Result<()> {
        self.inner.linestring_end(tagged, idx)
    }
    fn multilinestring_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.multilinestring_begin(size, idx)
    }
    fn multilinestring_end(&mut self, idx: usize) -> Result<()> {
        self.inner.multilinestring_end(idx)
    }
    fn polygon_begin(&mut self, tagged: bool, size: usize, idx: usize) -> Result<()> {
        self.inner.polygon_begin(tagged, size, idx)
    }
    fn polygon_end(&mut self, tagged: bool, idx: usize) -> Result<()> {
        self.inner.polygon_end(tagged, idx)
    }
    fn multipolygon_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.multipolygon_begin(size, idx)
    }
    fn multipolygon_end(&mut self, idx: usize) -> Result<()> {
        self.inner.multipolygon_end(idx)
    }
    fn geometrycollection_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.geometrycollection_begin(size, idx)
    }
    fn geometrycollection_end(&mut self, idx: usize) -> Result<()> {
        self.inner.geometrycollection_end(idx)
    }
    fn circularstring_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.circularstring_begin(size, idx)
    }
    fn circularstring_end(&mut self, idx: usize) -> Result<()> {
        self.inner.circularstring_end(idx)
    }
    fn compoundcurve_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.compoundcurve_begin(size, idx)
    }
    fn compoundcurve_end(&mut self, idx: usize) -> Result<()> {
        self.inner.compoundcurve_end(idx)
    }
    fn curvepolygon_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.curvepolygon_begin(size, idx)
    }
    fn curvepolygon_end(&mut self, idx: usize) -> Result<()> {
        self.inner.curvepolygon_end(idx)
    }
    fn multicurve_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.multicurve_begin(size, idx)
    }
    fn multicurve_end(&mut self, idx: usize) -> Result<()> {
        self.inner.multicurve_end(idx)
    }
    fn multisurface_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.multisurface_begin(size, idx)
    }
    fn multisurface_end(&mut self, idx: usize) -> Result<()> {
        self.inner.multisurface_end(idx)
    }
    fn triangle_begin(&mut self, tagged: bool, size: usize, idx: usize) -> Result<()> {
        self.inner.triangle_begin(tagged, size, idx)
    }
    fn triangle_end(&mut self, tagged: bool, idx: usize) -> Result<()> {
        self.inner.triangle_end(tagged, idx)
    }
    fn polyhedralsurface_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.polyhedralsurface_begin(size, idx)
    }
    fn polyhedralsurface_end(&mut self, idx: usize) -> Result<()> {
        self.inner.polyhedralsurface_end(idx)
    }
    fn tin_begin(&mut self, size: usize, idx: usize) -> Result<()> {
        self.inner.tin_begin(size, idx)
    }
    fn tin_end(&mut self, idx: usize) -> Result<()> {
        self.inner.tin_end(idx)
    }
}

impl<T: PropertyProcessor, F: Fn(&mut f64, &mut f64)> PropertyProcessor
    for WrappedXYProcessor<T, F>
{
    fn property(&mut self, idx: usize, name: &str, value: &ColumnValue<'_>) -> Result<bool> {
        self.inner.property(idx, name, value)
    }
}

impl<T: FeatureProcessor, F: Fn(&mut f64, &mut f64)> FeatureProcessor for WrappedXYProcessor<T, F> {
    fn dataset_begin(&mut self, name: Option<&str>) -> Result<()> {
        self.inner.dataset_begin(name)
    }
    fn dataset_end(&mut self) -> Result<()> {
        self.inner.dataset_end()
    }
    fn feature_begin(&mut self, idx: u64) -> Result<()> {
        self.inner.feature_begin(idx)
    }
    fn feature_end(&mut self, idx: u64) -> Result<()> {
        self.inner.feature_end(idx)
    }
    fn properties_begin(&mut self) -> Result<()> {
        self.inner.properties_begin()
    }
    fn properties_end(&mut self) -> Result<()> {
        self.inner.properties_end()
    }
    fn geometry_begin(&mut self) -> Result<()> {
        self.inner.geometry_begin()
    }
    fn geometry_end(&mut self) -> Result<()> {
        self.inner.geometry_end()
    }
}

#[cfg(all(feature = "with-csv", feature = "with-geojson"))]
#[cfg(test)]
mod test {
    use crate::csv::CsvWriter;
    use crate::geojson::GeoJsonString;
    use crate::{GeomProcessor, GeozeroDatasource};
    use serde_json::json;

    fn geojson_fixture_data() -> GeoJsonString {
        GeoJsonString(
            json!({
                "type": "FeatureCollection",
                "features": [
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 100
                        },
                        "geometry": {
                            "type": "Point",
                            "coordinates": [1.0, 2.0]
                        }
                    },
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 200
                        },
                        "geometry": {
                            "type": "Point",
                            "coordinates": [3.0, 4.0]
                        }
                    }
                ]
            })
            .to_string(),
        )
    }

    #[test]
    fn test_pre_process() {
        let mut geojson = geojson_fixture_data();
        let mut out = Vec::new();
        {
            let mut transforming_csv_writer =
                CsvWriter::new(&mut out).pre_process_xy(|x: &mut f64, y: &mut f64| {
                    *x += 1.0;
                    *y += 2.0;
                });
            geojson.process(&mut transforming_csv_writer).unwrap();
        }
        assert_eq!(
            String::from_utf8(out).unwrap(),
            "geometry,population\nPOINT(2 4),100\nPOINT(4 6),200\n"
        );
    }

    #[test]
    fn multiple_transforms() {
        let mut geojson = geojson_fixture_data();
        let mut out = Vec::new();
        {
            let mut transforming_csv_writer = CsvWriter::new(&mut out)
                .pre_process_xy(|x: &mut f64, y: &mut f64| {
                    *x += 1.0;
                    *y += 2.0;
                })
                .pre_process_xy(|x: &mut f64, y: &mut f64| {
                    // It might be surprising that this second transformation is applied before the first.
                    // It makes sense if you think about each subsequent call as an "insert first", but
                    // it's admittedly potentially confusing.
                    *x *= 2.0;
                    *y *= 2.0;
                });
            geojson.process(&mut transforming_csv_writer).unwrap();
        }

        assert_eq!(
            String::from_utf8(out).unwrap(),
            "geometry,population\nPOINT(3 6),100\nPOINT(7 10),200\n"
        );
    }
}