nahpu_db 0.1.0

A utility crate for handling database schema and models, auto-generating Rust structs from the NAHPU SQLite Drift schema.
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

pub mod export;
pub mod import;

use polars::prelude::{DataFrame, SerReader, SerWriter};
use serde::{Serialize, de::DeserializeOwned};

pub trait NahpuExport {
    /// Convert the collection to a Polars DataFrame.
    fn to_dataframe(&self) -> Result<DataFrame, String>;
}

pub trait NahpuImport: Sized {
    /// Create a collection from a Polars DataFrame.
    fn from_dataframe(df: &mut DataFrame) -> Result<Vec<Self>, String>;
}

impl<T> NahpuExport for [T]
where
    T: Serialize,
{
    fn to_dataframe(&self) -> Result<DataFrame, String> {
        let json_bytes = serde_json::to_vec(self).map_err(|e| e.to_string())?;
        let cursor = std::io::Cursor::new(json_bytes);
        polars::prelude::JsonReader::new(cursor)
            .finish()
            .map_err(|e| e.to_string())
    }
}

impl<T> NahpuExport for Vec<T>
where
    T: Serialize,
{
    fn to_dataframe(&self) -> Result<DataFrame, String> {
        self.as_slice().to_dataframe()
    }
}

impl<T> NahpuImport for T
where
    T: DeserializeOwned,
{
    fn from_dataframe(df: &mut DataFrame) -> Result<Vec<Self>, String> {
        let mut buf = Vec::new();
        polars::prelude::JsonWriter::new(&mut buf)
            .with_json_format(polars::prelude::JsonFormat::Json)
            .finish(df)
            .map_err(|e| e.to_string())?;
        serde_json::from_slice(&buf).map_err(|e| e.to_string())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::types::nahpu_sqlite::Site;
    use std::fs;
    use std::path::PathBuf;

    fn get_dummy_sites() -> Vec<Site> {
        vec![
            Site {
                id: 1,
                site_id: Some("S1".to_string()),
                project_uuid: Some("uuid-1".to_string()),
                lead_staff_id: None,
                site_type: Some("Forest".to_string()),
                country: Some("USA".to_string()),
                state_province: Some("California".to_string()),
                county: None,
                municipality: None,
                media_id: None,
                locality: Some("Yosemite".to_string()),
                remark: None,
                habitat_type: None,
                habitat_condition: None,
                habitat_description: None,
            },
            Site {
                id: 2,
                site_id: Some("S2".to_string()),
                project_uuid: Some("uuid-2".to_string()),
                lead_staff_id: None,
                site_type: Some("Desert".to_string()),
                country: Some("USA".to_string()),
                state_province: Some("Nevada".to_string()),
                county: None,
                municipality: None,
                media_id: None,
                locality: Some("Mojave".to_string()),
                remark: None,
                habitat_type: None,
                habitat_condition: None,
                habitat_description: None,
            },
        ]
    }

    #[test]
    fn test_csv_export_import() {
        let sites = get_dummy_sites();
        let mut df = sites.to_dataframe().unwrap();

        let path = PathBuf::from("test_export.csv");
        super::export::export_csv(&mut df, &path).unwrap();

        let mut imported_df = super::import::import_csv(&path).unwrap();
        let imported_sites: Vec<Site> = Site::from_dataframe(&mut imported_df).unwrap();

        assert_eq!(imported_sites.len(), 2);
        assert_eq!(imported_sites[0].site_id.as_deref(), Some("S1"));
        assert_eq!(imported_sites[1].site_id.as_deref(), Some("S2"));

        let _ = fs::remove_file(path);
    }

    #[test]
    fn test_excel_export_import() {
        let sites = get_dummy_sites();
        let mut df = sites.to_dataframe().unwrap();

        let path = PathBuf::from("test_export.xlsx");
        super::export::export_excel(&mut df, &path).unwrap();

        let mut imported_df = super::import::import_excel(&path, "Sheet1").unwrap();
        let imported_sites: Vec<Site> = Site::from_dataframe(&mut imported_df).unwrap();

        assert_eq!(imported_sites.len(), 2);
        assert_eq!(imported_sites[0].site_id.as_deref(), Some("S1"));
        assert_eq!(imported_sites[1].site_id.as_deref(), Some("S2"));

        let _ = fs::remove_file(path);
    }
}