X-Git-Url: http://git.scottworley.com/tablify/blobdiff_plain/06a6a5cad195d0b7504c4e7b4caf085487f53578..e44de444711dd8dc9d79f4fd6ab86c2d0fd26862:/src/lib.rs diff --git a/src/lib.rs b/src/lib.rs index 73e517b..b52806a 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -4,8 +4,19 @@ use std::fmt::Write; use std::io::BufRead; use std::iter::Iterator; -pub struct Config { - pub column_threshold: usize, +#[derive(PartialEq, Eq, Debug)] +struct Config { + column_threshold: usize, +} +impl Config { + fn apply_command(&mut self, cmd: &str) -> Result<(), std::io::Error> { + if let Some(threshold) = cmd.strip_prefix("col_threshold ") { + self.column_threshold = threshold + .parse() + .map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidInput, e))?; + } + Ok(()) + } } const HEADER: &str = r#" @@ -18,6 +29,7 @@ const HEADER: &str = r#" /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */ th, td { white-space: nowrap; } th { text-align: left; font-weight: normal; } + th.spacer_row { height: .3em; } table { border-collapse: collapse } tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 } tr.key > th > div { width: 1em; } @@ -86,12 +98,15 @@ enum InputLine<'a> { Blank, RowHeader(&'a str), Entry(&'a str, Option<&'a str>), + Command(&'a str), } impl<'a> From<&'a str> for InputLine<'a> { fn from(value: &'a str) -> InputLine<'a> { let trimmed = value.trim_end(); if trimmed.is_empty() { InputLine::Blank + } else if let Some(cmd) = trimmed.strip_prefix('!') { + InputLine::Command(cmd) } else if !trimmed.starts_with(' ') { InputLine::RowHeader(value.trim()) } else { @@ -115,19 +130,23 @@ enum Rowlike { Spacer, } -struct Reader>> { +struct Reader<'cfg, Input: Iterator>> { input: std::iter::Enumerate, row: Option, + config: &'cfg mut Config, } -impl>> Reader { - fn new(input: Input) -> Self { +impl<'cfg, Input: Iterator>> Reader<'cfg, Input> { + fn new(config: &'cfg mut Config, input: Input) -> Self { Self { input: input.enumerate(), row: None, + config, } } } -impl>> Iterator for Reader { +impl<'cfg, Input: Iterator>> Iterator + for Reader<'cfg, Input> +{ type Item = Result; fn next(&mut self) -> Option { loop { @@ -135,10 +154,15 @@ impl>> Iterator for Reader None => return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose(), Some((_, Err(e))) => return Some(Err(e)), Some((n, Ok(line))) => match InputLine::from(line.as_ref()) { + InputLine::Command(cmd) => { + if let Err(e) = self.config.apply_command(cmd) { + return Some(Err(e)); + } + } InputLine::Blank if self.row.is_some() => { return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose() } - InputLine::Blank => {} + InputLine::Blank => return Some(Ok(Rowlike::Spacer)), InputLine::Entry(col, instance) => match &mut self.row { None => { return Some(Err(std::io::Error::other(format!( @@ -169,8 +193,14 @@ impl>> Iterator for Reader } } -fn read_rows(input: impl std::io::Read) -> impl Iterator> { - Reader::new(std::io::BufReader::new(input).lines()) +fn read_input(input: impl std::io::Read) -> Result<(Vec, Config), std::io::Error> { + let mut config = Config { + column_threshold: 2, + }; + let reader = Reader::new(&mut config, std::io::BufReader::new(input).lines()); + reader + .collect::, _>>() + .map(|rows| (rows, config)) } fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> { @@ -265,7 +295,7 @@ fn render_all_leftovers(row: &Row) -> HTML { fn render_row(columns: &[String], rowlike: &mut Rowlike) -> HTML { match rowlike { - Rowlike::Spacer => HTML::from(" "), + Rowlike::Spacer => HTML::from("\n"), Rowlike::Row(row) => { let row_label = HTML::escape(row.label.as_ref()); let cells = columns @@ -302,9 +332,9 @@ fn render_column_headers(columns: &[String]) -> HTML { /// * there's an i/o error while reading `input` /// * the log has invalid syntax: /// * an indented line with no preceding non-indented line -pub fn tablify(config: &Config, input: impl std::io::Read) -> Result { - let rows = read_rows(input).collect::, _>>()?; - let columns = column_order(config, &rows); +pub fn tablify(input: impl std::io::Read) -> Result { + let (rows, config) = read_input(input)?; + let columns = column_order(&config, &rows); Ok(HTML(format!( "{HEADER}{}{}{FOOTER}", render_column_headers(&columns), @@ -347,24 +377,30 @@ mod tests { ); } + fn read_rows(input: impl std::io::Read) -> Result, std::io::Error> { + read_input(input).map(|(rows, _)| rows) + } + fn read_config(input: impl std::io::Read) -> Result { + read_input(input).map(|(_, config)| config) + } #[test] fn test_read_rows() { assert_eq!( - read_rows(&b"foo"[..]).flatten().collect::>(), + read_rows(&b"foo"[..]).unwrap(), vec![Rowlike::Row(Row { label: "foo".to_owned(), entries: HashMap::new(), })] ); assert_eq!( - read_rows(&b"bar"[..]).flatten().collect::>(), + read_rows(&b"bar"[..]).unwrap(), vec![Rowlike::Row(Row { label: "bar".to_owned(), entries: HashMap::new(), })] ); assert_eq!( - read_rows(&b"foo\nbar\n"[..]).flatten().collect::>(), + read_rows(&b"foo\nbar\n"[..]).unwrap(), vec![ Rowlike::Row(Row { label: "foo".to_owned(), @@ -377,16 +413,14 @@ mod tests { ] ); assert_eq!( - read_rows(&b"foo\n bar\n"[..]).flatten().collect::>(), + read_rows(&b"foo\n bar\n"[..]).unwrap(), vec![Rowlike::Row(Row { label: "foo".to_owned(), entries: HashMap::from([("bar".to_owned(), vec![None])]), })] ); assert_eq!( - read_rows(&b"foo\n bar\n baz\n"[..]) - .flatten() - .collect::>(), + read_rows(&b"foo\n bar\n baz\n"[..]).unwrap(), vec![Rowlike::Row(Row { label: "foo".to_owned(), entries: HashMap::from([ @@ -396,14 +430,26 @@ mod tests { })] ); assert_eq!( - read_rows(&b"foo\n\nbar\n"[..]) - .flatten() - .collect::>(), + read_rows(&b"foo\n\nbar\n"[..]).unwrap(), + vec![ + Rowlike::Row(Row { + label: "foo".to_owned(), + entries: HashMap::new(), + }), + Rowlike::Row(Row { + label: "bar".to_owned(), + entries: HashMap::new(), + }) + ] + ); + assert_eq!( + read_rows(&b"foo\n\n\nbar\n"[..]).unwrap(), vec![ Rowlike::Row(Row { label: "foo".to_owned(), entries: HashMap::new(), }), + Rowlike::Spacer, Rowlike::Row(Row { label: "bar".to_owned(), entries: HashMap::new(), @@ -411,9 +457,7 @@ mod tests { ] ); assert_eq!( - read_rows(&b"foo\n \nbar\n"[..]) - .flatten() - .collect::>(), + read_rows(&b"foo\n \nbar\n"[..]).unwrap(), vec![ Rowlike::Row(Row { label: "foo".to_owned(), @@ -426,55 +470,53 @@ mod tests { ] ); assert_eq!( - read_rows(&b"foo \n bar \n"[..]) - .flatten() - .collect::>(), + read_rows(&b"foo \n bar \n"[..]).unwrap(), vec![Rowlike::Row(Row { label: "foo".to_owned(), entries: HashMap::from([("bar".to_owned(), vec![None])]), })] ); - let bad = read_rows(&b" foo"[..]).next().unwrap(); + let bad = read_rows(&b" foo"[..]); assert!(bad.is_err()); assert!(format!("{bad:?}").contains("1: Entry with no header")); - let bad2 = read_rows(&b"foo\n\n bar"[..]).nth(1).unwrap(); + let bad2 = read_rows(&b"foo\n\n bar"[..]); assert!(bad2.is_err()); assert!(format!("{bad2:?}").contains("3: Entry with no header")); } + #[test] + fn test_read_config() { + assert_eq!( + read_config(&b"!col_threshold 10"[..]).unwrap(), + Config { + column_threshold: 10 + } + ); + + let bad_num = read_config(&b"!col_threshold foo"[..]); + assert!(bad_num.is_err()); + assert!(format!("{bad_num:?}").contains("Parse")); + } + #[test] fn test_column_counts() { assert_eq!( - column_counts( - &read_rows(&b"foo\n bar\n baz\n"[..]) - .collect::, _>>() - .unwrap() - ), + column_counts(&read_rows(&b"foo\n bar\n baz\n"[..]).unwrap()), vec![(1, String::from("bar")), (1, String::from("baz"))] ); assert_eq!( - column_counts( - &read_rows(&b"foo\n bar\n baz\nquux\n baz"[..]) - .collect::, _>>() - .unwrap() - ), + column_counts(&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..]).unwrap()), vec![(2, String::from("baz")), (1, String::from("bar"))] ); assert_eq!( - column_counts( - &read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..]) - .collect::, _>>() - .unwrap() - ), + column_counts(&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..]).unwrap()), vec![(2, String::from("baz")), (1, String::from("bar"))] ); assert_eq!( column_counts( - &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]) - .collect::, _>>() - .unwrap() + &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]).unwrap() ), vec![(2, String::from("baz")), (1, String::from("bar"))] );