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use crate::reader_range::ReaderRange;
use crate::{
// ReaderRange,
TapConfig,
TapError,
TapReader,
TapReaderState,
};
use crate::{tap_error::Result, tap_headers::TapHeaders};
use calamine::{Reader as XlsxReader, Xlsx, open_workbook};
use csv::ReaderBuilder;
use std::fs::File;
// use indexmap::IndexSet;
use std::io::{
self,
BufReader,
// BufReader
};
use std::path::Path;
#[derive(Default)]
pub struct TapReaderBuilder {
_reader_builder: ReaderBuilder,
}
impl TapReaderBuilder {
pub fn new() -> TapReaderBuilder {
TapReaderBuilder::default()
}
/*
// Most of these options are copied from CSV Rust
pub fn _flexible(mut self, yes: bool) -> Self {
self.reader_builder.flexible(yes);
self
}
pub fn _trim(&mut self, trim: Trim) -> &mut TapReaderBuilder {
self.reader_builder.trim(trim);
self
}
pub fn _terminator(&mut self, term: Terminator) -> &mut TapReaderBuilder {
self.reader_builder.terminator(term);
self
}
pub fn _quote(&mut self, quote: u8) -> &mut TapReaderBuilder {
self.reader_builder.quote(quote);
self
}
pub fn _delimiter(&mut self, delimiter: u8) -> &mut TapReaderBuilder {
self.reader_builder.delimiter(delimiter);
self
}
*/
/// Build a TapReader from a path and a `TapConfig`
///
/// # Example
/// ```no_run
/// use dctap::TapReaderBuilder;
/// use dctap::TapConfig;
/// use std::error::Error;
///
/// # fn main() { example().unwrap(); }
/// fn example() -> Result<(), Box<dyn Error>> {
/// let mut tap = TapReaderBuilder::from_path("foo.csv", &TapConfig::default())?;
/// for result in tap.shapes() {
/// let shape = result?;
/// println!("{:?}", shape);
/// }
/// Ok(())
/// }
/// ```
pub fn from_path<P: AsRef<Path>>(path: P, config: &TapConfig) -> Result<TapReader<File>> {
let mut reader = ReaderBuilder::new()
.delimiter(config.delimiter())
.quote(config.quote())
.flexible(config.flexible())
.from_path(path)?;
let rcd_headers = reader.headers()?;
let headers = TapHeaders::from_record(rcd_headers)?;
let state = TapReaderState::new().with_headers(headers);
Ok(TapReader::new_csv_reader(reader, state, config))
}
pub fn from_reader<R: io::Read>(rdr: R, config: &TapConfig) -> Result<TapReader<R>> {
let mut reader = ReaderBuilder::new()
.delimiter(config.delimiter())
.quote(config.quote())
.flexible(config.flexible())
.from_reader(rdr);
let rcd_headers = reader.headers()?;
let headers = TapHeaders::from_record(rcd_headers)?;
let state = TapReaderState::new().with_headers(headers);
Ok(TapReader::new_csv_reader(reader, state, config))
}
pub fn from_excel<R: io::Read, P: AsRef<Path>>(
path: P,
sheet_name: Option<&str>,
config: &TapConfig,
) -> Result<TapReader<R>> {
let path_name = path.as_ref().to_string_lossy().to_string();
let mut excel: Xlsx<_> = match open_workbook(path) {
Ok(xls) => Ok::<calamine::Xlsx<BufReader<File>>, TapError>(xls),
Err(e) => Err(TapError::OpeningWorkbook {
path: path_name.clone(),
error: e,
}),
}?;
let range = match sheet_name {
None => match excel.worksheet_range_at(0) {
Some(range) => range.map_err(|e| TapError::Sheet0Error {
path: path_name.clone(),
error: e,
}),
None => Err(TapError::Sheet0NotFound {
path: path_name.clone(),
}),
},
Some(name) => excel.worksheet_range(name).map_err(|e| TapError::SheetNameError {
path: path_name.clone(),
sheet_name: name.to_string(),
error: e,
}),
}?;
let mut reader_range: ReaderRange<R> = ReaderRange::new(range);
if let Some(rcd) = reader_range.next_record() {
let headers = TapHeaders::from_record(&rcd)?;
let state = TapReaderState::new().with_headers(headers);
Ok(TapReader::new_range_reader(reader_range, state, config))
} else {
Err(TapError::NoHeadersExcel {
path: path_name.clone(),
})
}
}
}