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
|
use hittekaart::gpx::{self, Compression, Coordinates};
use hittekaart::renderer::{self, Renderer};
use pyo3::create_exception;
use pyo3::exceptions::PyTypeError;
use pyo3::prelude::*;
use std::error::Error;
use std::ffi::OsStr;
use std::fmt::Write as _;
use std::os::unix::ffi::OsStrExt as _;
use std::path::PathBuf;
create_exception!(hittekaart_py, HitteError, pyo3::exceptions::PyException);
fn err_to_py(mut error: &dyn Error) -> PyErr {
let mut text = error.to_string();
loop {
match error.source() {
None => break,
Some(e) => error = e,
}
write!(&mut text, "\ncaused by: {error}").unwrap();
}
HitteError::new_err(text)
}
#[pyclass]
#[derive(Debug, Clone)]
struct Track {
inner: Vec<Coordinates>,
}
#[pymethods]
impl Track {
#[staticmethod]
fn from_file(path: &[u8], compression: Option<&str>) -> PyResult<Track> {
let compression = match compression {
None | Some("") => Compression::None,
Some("gzip") => Compression::Gzip,
Some("brotli") => Compression::Brotli,
Some(x) => return Err(HitteError::new_err(format!("invalid compression: {x}"))),
};
let track = gpx::extract_from_file(OsStr::from_bytes(path), compression)
.map_err(|e| err_to_py(&e))?;
Ok(Track { inner: track })
}
#[staticmethod]
fn from_coordinates(coordinates: Vec<(f64, f64)>) -> Track {
Track {
inner: coordinates
.iter()
.map(|(lon, lat)| Coordinates::new(*lon, *lat))
.collect(),
}
}
fn coordinates(&self) -> Vec<(f64, f64)> {
self.inner
.iter()
.map(|c| (c.longitude, c.latitude))
.collect()
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
enum StorageType {
Folder(PathBuf),
Sqlite(PathBuf),
}
#[pyclass]
#[derive(Debug, Clone, PartialEq, Eq)]
struct Storage(StorageType);
#[pymethods]
impl Storage {
#[staticmethod]
#[pyo3(name = "Folder")]
fn folder(path: &[u8]) -> Self {
let path = OsStr::from_bytes(path);
Storage(StorageType::Folder(path.into()))
}
#[staticmethod]
#[pyo3(name = "Sqlite")]
fn sqlite(path: &[u8]) -> Self {
let path = OsStr::from_bytes(path);
Storage(StorageType::Sqlite(path.into()))
}
}
impl Storage {
fn open(&self) -> PyResult<Box<dyn hittekaart::storage::Storage>> {
match self.0 {
StorageType::Folder(ref path) => {
let storage = hittekaart::storage::Folder::new(path.clone());
Ok(Box::new(storage))
}
StorageType::Sqlite(ref path) => {
let storage = hittekaart::storage::Sqlite::connect(path.clone())
.map_err(|e| err_to_py(&e))?;
Ok(Box::new(storage))
}
}
}
}
#[pyclass]
struct HeatmapRenderer {
inner: renderer::heatmap::Renderer,
}
#[pymethods]
impl HeatmapRenderer {
#[new]
fn new() -> HeatmapRenderer {
HeatmapRenderer {
inner: renderer::heatmap::Renderer,
}
}
}
#[pyfunction]
fn generate(
items: &Bound<'_, PyAny>,
renderer: &Bound<'_, PyAny>,
storage: &Bound<'_, Storage>,
) -> PyResult<()> {
let mut tracks = vec![];
for item in items.try_iter()? {
let item = item?;
tracks.push(item.extract::<Track>()?.inner);
}
if let Ok(r) = renderer.downcast::<HeatmapRenderer>() {
do_generate(tracks, &r.borrow().inner, &mut *storage.borrow().open()?)
} else {
Err(PyTypeError::new_err("Expected a HeatmapRenderer"))
}
}
fn do_generate<R: Renderer>(
tracks: Vec<Vec<Coordinates>>,
renderer: &R,
storage: &mut dyn hittekaart::storage::Storage,
) -> PyResult<()> {
storage.prepare().map_err(|e| err_to_py(&e))?;
for zoom in 0..=19 {
let counter =
renderer::prepare(renderer, zoom, &tracks, || Ok(())).map_err(|e| err_to_py(&e))?;
storage.prepare_zoom(zoom).map_err(|e| err_to_py(&e))?;
renderer::colorize(renderer, counter, |rendered_tile| {
storage.store(zoom, rendered_tile.x, rendered_tile.y, &rendered_tile.data)?;
Ok(())
})
.map_err(|e| err_to_py(&e))?;
}
storage.finish().map_err(|e| err_to_py(&e))?;
Ok(())
}
/// A Python module implemented in Rust.
#[pymodule]
fn hittekaart_py(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
m.add_class::<Track>()?;
m.add_class::<HeatmapRenderer>()?;
m.add_class::<Storage>()?;
m.add_function(wrap_pyfunction!(generate, m)?)?;
m.add("HitteError", py.get_type::<HitteError>())?;
Ok(())
}
|
