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//! CSV impl and reexported types
use csv;
pub use self::csv::{Reader, Writer, Result, ReaderBuilder};
use std::path::Path;
use std::io::{Read, Write};
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(|cell| super::Cell::new(&cell))
.collect())
})
.collect())
}
/// Write the table to the specified writer.
pub fn to_csv<W: Write>(&self, w: W) -> Result<Writer<W>> {
self.as_ref().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_ref().to_csv_writer(writer)
}
}
#[cfg(test)]
mod tests {
use crate::{Table, Row, Cell};
static CSV_S: &'static 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");
}
}
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