65 lines
2.1 KiB
Rust
65 lines
2.1 KiB
Rust
use calamine::{Reader, open_workbook_from_rs, Xlsx, Data};
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use std::io::Cursor;
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use domain::models::{ImportError, ParsedFile};
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pub fn parse_xlsx(bytes: &[u8]) -> Result<ParsedFile, ImportError> {
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let cursor = Cursor::new(bytes);
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let mut workbook: Xlsx<_> = open_workbook_from_rs(cursor)
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.map_err(|e: calamine::XlsxError| ImportError::Xlsx(e.to_string()))?;
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let sheet_name = workbook.sheet_names()
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.first()
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.cloned()
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.ok_or(ImportError::Empty)?;
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let range = workbook.worksheet_range(&sheet_name)
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.map_err(|e| ImportError::Xlsx(e.to_string()))?;
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let mut iter = range.rows();
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let header = iter.next().ok_or(ImportError::NoHeader)?;
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let columns: Vec<String> = header.iter()
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.map(|c| cell_to_string(c).trim().to_string())
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.collect();
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if columns.is_empty() {
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return Err(ImportError::NoHeader);
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}
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let rows: Vec<Vec<String>> = iter
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.map(|row| {
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let mut cells: Vec<String> = row.iter().map(cell_to_string).collect();
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cells.resize(columns.len(), String::new());
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cells.truncate(columns.len());
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cells
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})
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.collect();
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if rows.is_empty() {
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return Err(ImportError::Empty);
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}
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Ok(ParsedFile { columns, rows })
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}
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fn cell_to_string(cell: &Data) -> String {
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match cell {
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Data::String(s) => s.clone(),
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Data::Float(f) => {
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if f.fract() == 0.0 { format!("{}", *f as i64) } else { format!("{}", f) }
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}
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Data::Int(i) => i.to_string(),
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Data::Bool(b) => b.to_string(),
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Data::DateTime(dt) => {
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// ExcelDateTime::to_ymd_hms_milli() works without the chrono feature.
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let (year, month, day, _, _, _, _) = dt.to_ymd_hms_milli();
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format!("{:04}-{:02}-{:02}", year, month, day)
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}
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Data::DateTimeIso(s) => s.clone(),
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Data::DurationIso(s) => s.clone(),
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Data::Empty | Data::Error(_) => String::new(),
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// Fallback for unexpected calamine Data variants; renders as debug string
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other => format!("{other:?}"),
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}
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}
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