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

//! CSV impl and reexported types

use csv;

pub use self::csv::{Reader, ReaderBuilder, Result, Writer};
use crate::AsTableSlice;
use std::io::{Read, Write};
use std::path::Path;

impl<'a> super::TableSlice<'a> {
    /// Write the table to the specified writer.
    pub fn to_csv<W: Write>(&self, w: W) -> Result<Writer<W>> {
        self.to_csv_writer(Writer::from_writer(w))
    }

    /// Write the table to the specified writer.
    ///
    /// This allows for format customisation.
    pub fn to_csv_writer<W: Write>(&self, mut writer: Writer<W>) -> Result<Writer<W>> {
        for title in self.titles {
            writer.write_record(title.iter().map(|c| c.get_content()))?;
        }
        for row in self.rows {
            writer.write_record(row.iter().map(|c| c.get_content()))?;
        }

        writer.flush()?;
        Ok(writer)
    }
}

impl super::Table {
    /// Create a table from a CSV string
    ///
    /// For more customisability use `from_csv()`
    pub fn from_csv_string(csv_s: &str) -> Result<Self> {
        Ok(Self::from_csv(
            &mut ReaderBuilder::new()
                .has_headers(false)
                .from_reader(csv_s.as_bytes()),
        ))
    }

    /// Create a table from a CSV file
    ///
    /// For more customisability use `from_csv()`
    pub fn from_csv_file<P: AsRef<Path>>(csv_p: P) -> Result<Self> {
        Ok(Self::from_csv(
            &mut ReaderBuilder::new().has_headers(false).from_path(csv_p)?,
        ))
    }

    /// Create a table from a CSV reader
    pub fn from_csv<R: Read>(reader: &mut Reader<R>) -> Self {
        Self::init(
            reader
                .records()
                .map(|row| {
                    super::Row::new(
                        row.unwrap()
                            .into_iter()
                            .map(super::Cell::new)
                            .collect(),
                    )
                })
                .collect(),
        )
    }

    /// Write the table to the specified writer.
    pub fn to_csv<W: Write>(&self, w: W) -> Result<Writer<W>> {
        self.as_slice().to_csv(w)
    }

    /// Write the table to the specified writer.
    ///
    /// This allows for format customisation.
    pub fn to_csv_writer<W: Write>(&self, writer: Writer<W>) -> Result<Writer<W>> {
        self.as_slice().to_csv_writer(writer)
    }
}

#[cfg(test)]
mod tests {
    use crate::{Cell, Row, Table};

    static CSV_S: &str = "ABC,DEFG,HIJKLMN\n\
                        foobar,bar,foo\n\
                        foobar2,bar2,foo2\n";

    fn test_table() -> Table {
        let mut table = Table::new();
        table.add_row(Row::new(vec![
            Cell::new("ABC"),
            Cell::new("DEFG"),
            Cell::new("HIJKLMN"),
        ]));
        table.add_row(Row::new(vec![
            Cell::new("foobar"),
            Cell::new("bar"),
            Cell::new("foo"),
        ]));
        table.add_row(Row::new(vec![
            Cell::new("foobar2"),
            Cell::new("bar2"),
            Cell::new("foo2"),
        ]));
        table
    }

    #[test]
    fn from() {
        assert_eq!(
            test_table().to_string().replace("\r\n", "\n"),
            Table::from_csv_string(CSV_S)
                .unwrap()
                .to_string()
                .replace("\r\n", "\n")
        );
    }

    #[test]
    fn to() {
        assert_eq!(
            String::from_utf8(
                test_table()
                    .to_csv(Vec::new())
                    .unwrap()
                    .into_inner()
                    .unwrap()
            )
            .unwrap(),
            CSV_S
        );
    }

    #[test]
    fn trans() {
        assert_eq!(
            Table::from_csv_string(
                &String::from_utf8(
                    test_table()
                        .to_csv(Vec::new())
                        .unwrap()
                        .into_inner()
                        .unwrap()
                )
                .unwrap()
            )
            .unwrap()
            .to_string()
            .replace("\r\n", "\n"),
            test_table().to_string().replace("\r\n", "\n")
        );
    }

    #[test]
    fn extend_table() {
        let mut table = Table::new();
        table.add_row(Row::new(vec![
            Cell::new("ABC"),
            Cell::new("DEFG"),
            Cell::new("HIJKLMN"),
        ]));
        table.extend(vec![vec!["A", "B", "C"]]);
        let t2 = table.clone();
        table.extend(t2.rows);
        assert_eq!(
            table.get_row(1).unwrap().get_cell(2).unwrap().get_content(),
            "C"
        );
        assert_eq!(
            table.get_row(2).unwrap().get_cell(1).unwrap().get_content(),
            "DEFG"
        );
    }
}