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use db;
use paths;
pub fn run(query: &str, tsv: bool) -> failure::Fallible<()> {
let db = db::DB::new(&paths::db_path()?)?;
let rows_cell = std::cell::Cell::new(Some(vec![]));
let cols = db.query(query, |row| {
let display_row: Vec<String> = (0..row.column_count())
.map(|i| row.get_raw(i))
.map(|v| format_value(&v))
.collect();
let mut rows = rows_cell.replace(None).unwrap();
rows.push(display_row);
rows_cell.replace(Some(rows));
})?;
let rows = rows_cell.into_inner().unwrap();
if tsv {
print_tsv(&rows);
}
else {
print_table(&cols, &rows);
}
Ok(())
}
fn print_table(cols: &[String], rows: &[Vec<String>]) {
let widths = column_widths(&cols, &rows);
print_row(&widths, &cols);
let border: Vec<String> = widths.iter().map(|l| "-".repeat(*l)).collect();
println!("{}", &border.join("-+-"));
for row in rows {
print_row(&widths, &row);
}
}
fn print_tsv(rows: &[Vec<String>]) {
for row in rows {
println!("{}", row.join("\t"));
}
}
fn format_value(v: &rusqlite::types::ValueRef) -> String {
match v {
rusqlite::types::ValueRef::Null => "null".to_string(),
rusqlite::types::ValueRef::Integer(i) => format!("{}", i),
rusqlite::types::ValueRef::Real(f) => format!("{}", f),
rusqlite::types::ValueRef::Text(s) => format!("{}", s),
rusqlite::types::ValueRef::Blob(b) => format!("{:?}", b),
}
}
fn column_widths(cols: &[String], rows: &[Vec<String>]) -> Vec<usize> {
let mut max_widths: Vec<usize> = cols.iter().map(|s| s.len()).collect();
for row in rows {
for (i, col) in row.iter().enumerate() {
if col.len() > max_widths[i] {
max_widths[i] = col.len();
}
}
}
max_widths
}
fn print_row(widths: &[usize], row: &[String]) {
let fixed_width_row: Vec<String> = row
.iter()
.zip(widths.iter())
.map(|(s, width)| format!("{:width$}", s, width=width))
.collect();
println!("{}", &fixed_width_row.join(" | "));
}
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