1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199

//! geo-types conversions.
pub(crate) mod geo_types_reader;
pub(crate) mod geo_types_writer;

pub use geo_types_reader::*;
pub use geo_types_writer::*;

pub(crate) mod conversion {
    use crate::error::{GeozeroError, Result};
    use crate::geo_types::GeoWriter;
    use crate::GeozeroGeometry;

    /// Convert to geo-types Geometry.
    pub trait ToGeo {
        /// Convert to geo-types Geometry.
        fn to_geo(&self) -> Result<geo_types::Geometry<f64>>;
    }

    impl<T: GeozeroGeometry> ToGeo for T {
        fn to_geo(&self) -> Result<geo_types::Geometry<f64>> {
            let mut geo = GeoWriter::new();
            self.process_geom(&mut geo)?;
            geo.take_geometry()
                .ok_or(GeozeroError::Geometry("Missing Geometry".to_string()))
        }
    }
}

#[cfg(feature = "with-wkb")]
mod wkb {
    use crate::error::{GeozeroError, Result};
    use crate::geo_types::GeoWriter;
    use crate::wkb::{FromWkb, WkbDialect};
    use std::io::Read;

    impl FromWkb for geo_types::Geometry<f64> {
        fn from_wkb<R: Read>(rdr: &mut R, dialect: WkbDialect) -> Result<Self> {
            let mut geo = GeoWriter::new();
            crate::wkb::process_wkb_type_geom(rdr, &mut geo, dialect)?;
            geo.take_geometry()
                .ok_or(GeozeroError::Geometry("Missing Geometry".to_string()))
        }
    }
}

#[cfg(test)]
mod test {
    use crate::geo_types::conversion::ToGeo;
    use crate::geojson::GeoJsonString;

    use geo_types::{Geometry, GeometryCollection, Point};
    use serde_json::json;

    #[test]
    fn from_geojson_feature_collection_of_points() {
        let geojson = GeoJsonString(
            json!({
                "type": "FeatureCollection",
                "features": [
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 100
                        },
                        "geometry": {
                            "type": "Point",
                            "coordinates": [10.0, 45.0]
                        }
                    },
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 200
                        },
                        "geometry": {
                            "type": "Point",
                            "coordinates": [20.0, 45.0]
                        }
                    }
                ]
            })
            .to_string(),
        );

        let actual = geojson.to_geo().unwrap();
        let expected = Geometry::GeometryCollection(GeometryCollection::<f64>(vec![
            Point::new(10.0, 45.0).into(),
            Point::new(20.0, 45.0).into(),
        ]));
        assert_eq!(expected, actual);
    }

    #[test]
    fn from_geojson_feature_collection_geometry_collection_and_point() {
        let geojson = GeoJsonString(
            json!({
                "type": "FeatureCollection",
                "features": [
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 100
                        },
                        "geometry": {
                            "type": "GeometryCollection",
                            "geometries": [
                                {
                                    "type": "Point",
                                    "coordinates": [10.1, 45.0]
                                },
                                {
                                    "type": "Point",
                                    "coordinates": [10.2, 45.0]
                                }
                            ]
                        }
                    },
                    {
                        "type": "Feature",
                        "properties": {
                            "population": 200
                        },
                        "geometry": {
                            "type": "Point",
                            "coordinates": [20.0, 45.0]
                        }
                    }
                ]
            })
            .to_string(),
        );

        let actual = geojson.to_geo().unwrap();
        let expected = Geometry::GeometryCollection(GeometryCollection::<f64>(vec![
            Geometry::GeometryCollection(GeometryCollection::<f64>(vec![
                Point::new(10.1, 45.0).into(),
                Point::new(10.2, 45.0).into(),
            ])),
            Point::new(20.0, 45.0).into(),
        ]));
        assert_eq!(expected, actual);
    }

    #[test]
    fn from_geojson_point_feature() {
        let geojson = GeoJsonString(
            json!({
                "type": "Feature",
                "properties": {
                    "population": 100
                },
                "geometry": {
                    "type": "Point",
                    "coordinates": [10.0, 45.0]
                }
            })
            .to_string(),
        );

        use geo_types::{Geometry, Point};

        let actual = geojson.to_geo().unwrap();
        let expected = Geometry::Point(Point::new(10.0, 45.0));
        assert_eq!(expected, actual);
    }

    #[test]
    fn from_geojson_geometry_collection_feature() {
        let geojson = GeoJsonString(
            json!({
                "type": "Feature",
                "properties": {
                    "population": 100
                },
                "geometry": {
                    "type": "GeometryCollection",
                    "geometries": [
                        {
                            "type": "Point",
                            "coordinates": [10.0, 45.0]
                        },
                        {
                            "type": "Point",
                            "coordinates": [20.0, 45.0]
                        }
                    ]
                }
            })
            .to_string(),
        );

        let actual = geojson.to_geo().unwrap();
        let expected = Geometry::GeometryCollection(GeometryCollection::<f64>(vec![
            Point::new(10.0, 45.0).into(),
            Point::new(20.0, 45.0).into(),
        ]));
        assert_eq!(expected, actual);
    }
}