git.scottworley.com Git - tablify/blame_incremental - src/lib.rs

use std::collections::{HashMap, HashSet};
use std::fmt::Write;
use std::io::BufRead;
use std::iter::Iterator;

const HEADER: &str = "<!DOCTYPE html>
<html>
<head>
  <meta charset=\"utf-8\">
  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
  <style>
    td { text-align: center; }
    /* 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; }
    table { border-collapse: collapse }
    tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
    tr.key > th > div { width: 1em; }
    tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
    td { border: thin solid gray; }
    td.yes { border: thin solid gray; background-color: #ddd; }
    /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
    .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
  </style>
  <script>
    function highlight(id)       { const e = document.getElementById(id); if (e) { e.classList.add(   \"highlight\"); } }
    function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove(\"highlight\"); } }
    function h2(a, b)  {       highlight(a);       highlight(b); }
    function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
  </script>
</head>
<body>
  <table>
    <tbody>
";
const FOOTER: &str = "    </tbody>
  </table>
</body>
</html>";

#[derive(PartialEq, Eq, Debug)]
pub struct HTML(String);
impl HTML {
    fn escape(value: &str) -> HTML {
        let mut escaped: String = String::new();
        for c in value.chars() {
            match c {
                '>' => escaped.push_str("&gt;"),
                '<' => escaped.push_str("&lt;"),
                '\'' => escaped.push_str("&#39;"),
                '"' => escaped.push_str("&quot;"),
                '&' => escaped.push_str("&amp;"),
                ok_c => escaped.push(ok_c),
            }
        }
        HTML(escaped)
    }
}
impl From<&str> for HTML {
    fn from(value: &str) -> HTML {
        HTML(String::from(value))
    }
}
impl FromIterator<HTML> for HTML {
    fn from_iter<T>(iter: T) -> HTML
    where
        T: IntoIterator<Item = HTML>,
    {
        HTML(iter.into_iter().map(|html| html.0).collect::<String>())
    }
}
impl std::fmt::Display for HTML {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

#[derive(Debug, PartialEq, Eq, Hash)]
struct Entry<'a> {
    col: &'a str,
    instance: Option<&'a str>,
}
impl<'a> From<&'a str> for Entry<'a> {
    fn from(value: &'a str) -> Entry<'a> {
        match value.split_once(':') {
            None => Entry {
                col: value,
                instance: None,
            },
            Some((col, instance)) => Entry {
                col: col.trim(),
                instance: Some(instance.trim()),
            },
        }
    }
}

#[derive(Debug, PartialEq, Eq)]
struct RowInput<'a> {
    label: &'a str,
    entries: Vec<Entry<'a>>,
}

struct Reader<'a, Input: Iterator<Item = Result<String, std::io::Error>>> {
    input: std::iter::Enumerate<Input>,
    row: Option<RowInput<'a>>,
}
impl<'a, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'a, Input> {
    fn new(input: Input) -> Self {
        Self {
            input: input.enumerate(),
            row: None,
        }
    }
}
impl<'a, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<'a, Input> {
    type Item = Result<RowInput<'a>, std::io::Error>;
    fn next(&mut self) -> Option<Self::Item> {
        loop {
            match self.input.next() {
                None => return Ok(std::mem::take(&mut self.row)).transpose(),
                Some((_, Err(e))) => return Some(Err(e)),
                Some((_, Ok(line))) if line.trim_end().is_empty() && self.row.is_some() => {
                    return Ok(std::mem::take(&mut self.row)).transpose()
                }
                Some((_, Ok(line))) if line.trim_end().is_empty() => {}
                Some((n, Ok(line))) if line.starts_with(' ') => match &mut self.row {
                    None => {
                        return Some(Err(std::io::Error::other(format!(
                            "{}: Entry with no header",
                            n + 1
                        ))))
                    }
                    // TODO: Don't leak
                    Some(ref mut row) => row.entries.push(Entry::from(line.leak().trim())),
                },
                Some((_, Ok(line))) => {
                    let prev = std::mem::take(&mut self.row);
                    self.row = Some(RowInput {
                        // TODO: Don't leak
                        label: line.leak().trim_end(),
                        entries: vec![],
                    });
                    if prev.is_some() {
                        return Ok(prev).transpose();
                    }
                }
            }
        }
    }
}

fn read_rows(
    input: impl std::io::Read,
) -> impl Iterator<Item = Result<RowInput<'static>, std::io::Error>> {
    Reader::new(std::io::BufReader::new(input).lines())
}

fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
    let mut counts: Vec<_> = rows
        .iter()
        .flat_map(|r| {
            r.entries
                .iter()
                .map(|e| &e.col)
                .collect::<HashSet<_>>()
                .into_iter()
        })
        .fold(HashMap::new(), |mut cs, col| {
            cs.entry(String::from(*col))
                .and_modify(|n| *n += 1)
                .or_insert(1);
            cs
        })
        .into_iter()
        .map(|(col, n)| (n, col))
        .collect();
    counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
    counts
}
fn column_order(rows: &[RowInput]) -> Vec<String> {
    column_counts(rows)
        .into_iter()
        .map(|(_, col)| col)
        .collect()
}

fn render_instance(entry: &Entry) -> HTML {
    match &entry.instance {
        None => HTML::from("✓"),
        Some(instance) => HTML::escape(instance.as_ref()),
    }
}

fn render_cell(col: &str, row: &RowInput) -> HTML {
    let row_label = HTML::escape(row.label.as_ref());
    let col_label = HTML::escape(col);
    let entries: Vec<&Entry> = row.entries.iter().filter(|e| e.col == col).collect();
    let class = HTML::from(if entries.is_empty() { "" } else { "yes" });
    let all_empty = entries.iter().all(|e| e.instance.is_none());
    let contents = if entries.is_empty() || (all_empty && entries.len() == 1) {
        HTML::from("")
    } else if all_empty {
        HTML(format!("{}", entries.len()))
    } else {
        HTML(
            entries
                .iter()
                .map(|i| render_instance(i))
                .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
                .collect::<Vec<_>>()
                .join(" "),
        )
    };
    HTML(format!("<td class=\"{class}\" onmouseover=\"h2('{row_label}','{col_label}')\" onmouseout=\"ch2('{row_label}','{col_label}')\">{contents}</td>"))
}

fn render_row(columns: &[String], row: &RowInput) -> HTML {
    // This is O(n^2) & doesn't need to be
    let row_label = HTML::escape(row.label.as_ref());
    HTML(format!(
        "<tr><th id=\"{row_label}\">{row_label}</th>{}</tr>\n",
        &columns
            .iter()
            .map(|col| render_cell(col, row))
            .collect::<HTML>()
    ))
}

fn render_column_headers(columns: &[String]) -> HTML {
    HTML(
        String::from("<tr class=\"key\"><th></th>")
            + &columns.iter().fold(String::new(), |mut acc, col| {
                let col_header = HTML::escape(col.as_ref());
                write!(
                    &mut acc,
                    "<th id=\"{col_header}\"><div><div>{col_header}</div></div></th>"
                )
                .unwrap();
                acc
            })
            + "</tr>\n",
    )
}

/// # Errors
///
/// Will return `Err` if
///   * 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(input: impl std::io::Read) -> Result<HTML, std::io::Error> {
    let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
    let columns = column_order(&rows);
    Ok(HTML(format!(
        "{HEADER}{}{}{FOOTER}",
        render_column_headers(&columns),
        rows.into_iter()
            .map(|r| render_row(&columns, &r))
            .collect::<HTML>()
    )))
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parse_entry() {
        assert_eq!(
            Entry::from("foo"),
            Entry {
                col: "foo",
                instance: None
            }
        );
        assert_eq!(
            Entry::from("foo:bar"),
            Entry {
                col: "foo",
                instance: Some("bar")
            }
        );
        assert_eq!(
            Entry::from("foo: bar"),
            Entry {
                col: "foo",
                instance: Some("bar")
            }
        );
    }

    #[test]
    fn test_read_rows() {
        assert_eq!(
            read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: "foo",
                entries: vec![]
            }]
        );
        assert_eq!(
            read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: "bar",
                entries: vec![]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: "foo",
                    entries: vec![]
                },
                RowInput {
                    label: "bar",
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
            vec![RowInput {
                label: "foo",
                entries: vec![Entry::from("bar")]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\n bar\n baz\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![RowInput {
                label: "foo",
                entries: vec![Entry::from("bar"), Entry::from("baz")]
            }]
        );
        assert_eq!(
            read_rows(&b"foo\n\nbar\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: "foo",
                    entries: vec![]
                },
                RowInput {
                    label: "bar",
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo\n \nbar\n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![
                RowInput {
                    label: "foo",
                    entries: vec![]
                },
                RowInput {
                    label: "bar",
                    entries: vec![]
                }
            ]
        );
        assert_eq!(
            read_rows(&b"foo  \n bar  \n"[..])
                .flatten()
                .collect::<Vec<_>>(),
            vec![RowInput {
                label: "foo",
                entries: vec![Entry::from("bar")]
            }]
        );

        let bad = read_rows(&b" foo"[..]).next().unwrap();
        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();
        assert!(bad2.is_err());
        assert!(format!("{bad2:?}").contains("3: Entry with no header"));
    }

    #[test]
    fn test_column_counts() {
        assert_eq!(
            column_counts(
                &read_rows(&b"foo\n bar\n baz\n"[..])
                    .collect::<Result<Vec<_>, _>>()
                    .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::<Result<Vec<_>, _>>()
                    .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::<Result<Vec<_>, _>>()
                    .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::<Result<Vec<_>, _>>()
                    .unwrap()
            ),
            vec![(2, String::from("baz")), (1, String::from("bar"))]
        );
    }

    #[test]
    fn test_render_cell() {
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![]
                }
            ),
            HTML::from("<td class=\"\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("bar")]
                }
            ),
            HTML::from("<td class=\"\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("foo")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("foo"), Entry::from("foo")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">2</td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("foo: 5"), Entry::from("foo: 10")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">5 10</td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("foo: 5"), Entry::from("foo")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">5 ✓</td>")
        );
        assert_eq!(
            render_cell(
                "heart",
                &RowInput {
                    label: "nope",
                    entries: vec![Entry::from("heart: <3")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','heart')\" onmouseout=\"ch2('nope','heart')\">&lt;3</td>")
        );
        assert_eq!(
            render_cell(
                "foo",
                &RowInput {
                    label: "bob's",
                    entries: vec![Entry::from("foo")]
                }
            ),
            HTML::from("<td class=\"yes\" onmouseover=\"h2('bob&#39;s','foo')\" onmouseout=\"ch2('bob&#39;s','foo')\"></td>")
        );
    }
}
Commit	Line	Data
	1	use std::collections::{HashMap, HashSet};
	2	use std::fmt::Write;
	3	use std::io::BufRead;
	4	use std::iter::Iterator;
	5
	6	const HEADER: &str = "<!DOCTYPE html>
	7	<html>
	8	<head>
	9	<meta charset=\"utf-8\">
	10	<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
	11	<style>
	12	td { text-align: center; }
	13	/* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
	14	th, td { white-space: nowrap; }
	15	th { text-align: left; font-weight: normal; }
	16	table { border-collapse: collapse }
	17	tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
	18	tr.key > th > div { width: 1em; }
	19	tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
	20	td { border: thin solid gray; }
	21	td.yes { border: thin solid gray; background-color: #ddd; }
	22	/* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
	23	.highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
	24	</style>
	25	<script>
	26	function highlight(id) { const e = document.getElementById(id); if (e) { e.classList.add( \"highlight\"); } }
	27	function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove(\"highlight\"); } }
	28	function h2(a, b) { highlight(a); highlight(b); }
	29	function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
	30	</script>
	31	</head>
	32	<body>
	33	<table>
	34	<tbody>
	35	";
	36	const FOOTER: &str = " </tbody>
	37	</table>
	38	</body>
	39	</html>";
	40
	41	#[derive(PartialEq, Eq, Debug)]
	42	pub struct HTML(String);
	43	impl HTML {
	44	fn escape(value: &str) -> HTML {
	45	let mut escaped: String = String::new();
	46	for c in value.chars() {
	47	match c {
	48	'>' => escaped.push_str(">"),
	49	'<' => escaped.push_str("<"),
	50	'\'' => escaped.push_str("'"),
	51	'"' => escaped.push_str("""),
	52	'&' => escaped.push_str("&"),
	53	ok_c => escaped.push(ok_c),
	54	}
	55	}
	56	HTML(escaped)
	57	}
	58	}
	59	impl From<&str> for HTML {
	60	fn from(value: &str) -> HTML {
	61	HTML(String::from(value))
	62	}
	63	}
	64	impl FromIterator<HTML> for HTML {
	65	fn from_iter<T>(iter: T) -> HTML
	66	where
	67	T: IntoIterator<Item = HTML>,
	68	{
	69	HTML(iter.into_iter().map(\|html\| html.0).collect::<String>())
	70	}
	71	}
	72	impl std::fmt::Display for HTML {
	73	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	74	write!(f, "{}", self.0)
	75	}
	76	}
	77
	78	#[derive(Debug, PartialEq, Eq, Hash)]
	79	struct Entry<'a> {
	80	col: &'a str,
	81	instance: Option<&'a str>,
	82	}
	83	impl<'a> From<&'a str> for Entry<'a> {
	84	fn from(value: &'a str) -> Entry<'a> {
	85	match value.split_once(':') {
	86	None => Entry {
	87	col: value,
	88	instance: None,
	89	},
	90	Some((col, instance)) => Entry {
	91	col: col.trim(),
	92	instance: Some(instance.trim()),
	93	},
	94	}
	95	}
	96	}
	97
	98	#[derive(Debug, PartialEq, Eq)]
	99	struct RowInput<'a> {
	100	label: &'a str,
	101	entries: Vec<Entry<'a>>,
	102	}
	103
	104	struct Reader<'a, Input: Iterator<Item = Result<String, std::io::Error>>> {
	105	input: std::iter::Enumerate<Input>,
	106	row: Option<RowInput<'a>>,
	107	}
	108	impl<'a, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'a, Input> {
	109	fn new(input: Input) -> Self {
	110	Self {
	111	input: input.enumerate(),
	112	row: None,
	113	}
	114	}
	115	}
	116	impl<'a, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<'a, Input> {
	117	type Item = Result<RowInput<'a>, std::io::Error>;
	118	fn next(&mut self) -> Option<Self::Item> {
	119	loop {
	120	match self.input.next() {
	121	None => return Ok(std::mem::take(&mut self.row)).transpose(),
	122	Some((_, Err(e))) => return Some(Err(e)),
	123	Some((_, Ok(line))) if line.trim_end().is_empty() && self.row.is_some() => {
	124	return Ok(std::mem::take(&mut self.row)).transpose()
	125	}
	126	Some((_, Ok(line))) if line.trim_end().is_empty() => {}
	127	Some((n, Ok(line))) if line.starts_with(' ') => match &mut self.row {
	128	None => {
	129	return Some(Err(std::io::Error::other(format!(
	130	"{}: Entry with no header",
	131	n + 1
	132	))))
	133	}
	134	// TODO: Don't leak
	135	Some(ref mut row) => row.entries.push(Entry::from(line.leak().trim())),
	136	},
	137	Some((_, Ok(line))) => {
	138	let prev = std::mem::take(&mut self.row);
	139	self.row = Some(RowInput {
	140	// TODO: Don't leak
	141	label: line.leak().trim_end(),
	142	entries: vec![],
	143	});
	144	if prev.is_some() {
	145	return Ok(prev).transpose();
	146	}
	147	}
	148	}
	149	}
	150	}
	151	}
	152
	153	fn read_rows(
	154	input: impl std::io::Read,
	155	) -> impl Iterator<Item = Result<RowInput<'static>, std::io::Error>> {
	156	Reader::new(std::io::BufReader::new(input).lines())
	157	}
	158
	159	fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
	160	let mut counts: Vec<_> = rows
	161	.iter()
	162	.flat_map(\|r\| {
	163	r.entries
	164	.iter()
	165	.map(\|e\| &e.col)
	166	.collect::<HashSet<_>>()
	167	.into_iter()
	168	})
	169	.fold(HashMap::new(), \|mut cs, col\| {
	170	cs.entry(String::from(*col))
	171	.and_modify(\|n\| *n += 1)
	172	.or_insert(1);
	173	cs
	174	})
	175	.into_iter()
	176	.map(\|(col, n)\| (n, col))
	177	.collect();
	178	counts.sort_unstable_by(\|(an, acol), (bn, bcol)\| bn.cmp(an).then(acol.cmp(bcol)));
	179	counts
	180	}
	181	fn column_order(rows: &[RowInput]) -> Vec<String> {
	182	column_counts(rows)
	183	.into_iter()
	184	.map(\|(_, col)\| col)
	185	.collect()
	186	}
	187
	188	fn render_instance(entry: &Entry) -> HTML {
	189	match &entry.instance {
	190	None => HTML::from("✓"),
	191	Some(instance) => HTML::escape(instance.as_ref()),
	192	}
	193	}
	194
	195	fn render_cell(col: &str, row: &RowInput) -> HTML {
	196	let row_label = HTML::escape(row.label.as_ref());
	197	let col_label = HTML::escape(col);
	198	let entries: Vec<&Entry> = row.entries.iter().filter(\|e\| e.col == col).collect();
	199	let class = HTML::from(if entries.is_empty() { "" } else { "yes" });
	200	let all_empty = entries.iter().all(\|e\| e.instance.is_none());
	201	let contents = if entries.is_empty() \|\| (all_empty && entries.len() == 1) {
	202	HTML::from("")
	203	} else if all_empty {
	204	HTML(format!("{}", entries.len()))
	205	} else {
	206	HTML(
	207	entries
	208	.iter()
	209	.map(\|i\| render_instance(i))
	210	.map(\|html\| html.0) // Waiting for slice_concat_trait to stabilize
	211	.collect::<Vec<_>>()
	212	.join(" "),
	213	)
	214	};
	215	HTML(format!("<td class=\"{class}\" onmouseover=\"h2('{row_label}','{col_label}')\" onmouseout=\"ch2('{row_label}','{col_label}')\">{contents}</td>"))
	216	}
	217
	218	fn render_row(columns: &[String], row: &RowInput) -> HTML {
	219	// This is O(n^2) & doesn't need to be
	220	let row_label = HTML::escape(row.label.as_ref());
	221	HTML(format!(
	222	"<tr><th id=\"{row_label}\">{row_label}</th>{}</tr>\n",
	223	&columns
	224	.iter()
	225	.map(\|col\| render_cell(col, row))
	226	.collect::<HTML>()
	227	))
	228	}
	229
	230	fn render_column_headers(columns: &[String]) -> HTML {
	231	HTML(
	232	String::from("<tr class=\"key\"><th></th>")
	233	+ &columns.iter().fold(String::new(), \|mut acc, col\| {
	234	let col_header = HTML::escape(col.as_ref());
	235	write!(
	236	&mut acc,
	237	"<th id=\"{col_header}\"><div><div>{col_header}</div></div></th>"
	238	)
	239	.unwrap();
	240	acc
	241	})
	242	+ "</tr>\n",
	243	)
	244	}
	245
	246	/// # Errors
	247	///
	248	/// Will return `Err` if
	249	/// * there's an i/o error while reading `input`
	250	/// * the log has invalid syntax:
	251	/// * an indented line with no preceding non-indented line
	252	pub fn tablify(input: impl std::io::Read) -> Result<HTML, std::io::Error> {
	253	let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
	254	let columns = column_order(&rows);
	255	Ok(HTML(format!(
	256	"{HEADER}{}{}{FOOTER}",
	257	render_column_headers(&columns),
	258	rows.into_iter()
	259	.map(\|r\| render_row(&columns, &r))
	260	.collect::<HTML>()
	261	)))
	262	}
	263
	264	#[cfg(test)]
	265	mod tests {
	266	use super::*;
	267
	268	#[test]
	269	fn test_parse_entry() {
	270	assert_eq!(
	271	Entry::from("foo"),
	272	Entry {
	273	col: "foo",
	274	instance: None
	275	}
	276	);
	277	assert_eq!(
	278	Entry::from("foo:bar"),
	279	Entry {
	280	col: "foo",
	281	instance: Some("bar")
	282	}
	283	);
	284	assert_eq!(
	285	Entry::from("foo: bar"),
	286	Entry {
	287	col: "foo",
	288	instance: Some("bar")
	289	}
	290	);
	291	}
	292
	293	#[test]
	294	fn test_read_rows() {
	295	assert_eq!(
	296	read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
	297	vec![RowInput {
	298	label: "foo",
	299	entries: vec![]
	300	}]
	301	);
	302	assert_eq!(
	303	read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
	304	vec![RowInput {
	305	label: "bar",
	306	entries: vec![]
	307	}]
	308	);
	309	assert_eq!(
	310	read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
	311	vec![
	312	RowInput {
	313	label: "foo",
	314	entries: vec![]
	315	},
	316	RowInput {
	317	label: "bar",
	318	entries: vec![]
	319	}
	320	]
	321	);
	322	assert_eq!(
	323	read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
	324	vec![RowInput {
	325	label: "foo",
	326	entries: vec![Entry::from("bar")]
	327	}]
	328	);
	329	assert_eq!(
	330	read_rows(&b"foo\n bar\n baz\n"[..])
	331	.flatten()
	332	.collect::<Vec<_>>(),
	333	vec![RowInput {
	334	label: "foo",
	335	entries: vec![Entry::from("bar"), Entry::from("baz")]
	336	}]
	337	);
	338	assert_eq!(
	339	read_rows(&b"foo\n\nbar\n"[..])
	340	.flatten()
	341	.collect::<Vec<_>>(),
	342	vec![
	343	RowInput {
	344	label: "foo",
	345	entries: vec![]
	346	},
	347	RowInput {
	348	label: "bar",
	349	entries: vec![]
	350	}
	351	]
	352	);
	353	assert_eq!(
	354	read_rows(&b"foo\n \nbar\n"[..])
	355	.flatten()
	356	.collect::<Vec<_>>(),
	357	vec![
	358	RowInput {
	359	label: "foo",
	360	entries: vec![]
	361	},
	362	RowInput {
	363	label: "bar",
	364	entries: vec![]
	365	}
	366	]
	367	);
	368	assert_eq!(
	369	read_rows(&b"foo \n bar \n"[..])
	370	.flatten()
	371	.collect::<Vec<_>>(),
	372	vec![RowInput {
	373	label: "foo",
	374	entries: vec![Entry::from("bar")]
	375	}]
	376	);
	377
	378	let bad = read_rows(&b" foo"[..]).next().unwrap();
	379	assert!(bad.is_err());
	380	assert!(format!("{bad:?}").contains("1: Entry with no header"));
	381
	382	let bad2 = read_rows(&b"foo\n\n bar"[..]).nth(1).unwrap();
	383	assert!(bad2.is_err());
	384	assert!(format!("{bad2:?}").contains("3: Entry with no header"));
	385	}
	386
	387	#[test]
	388	fn test_column_counts() {
	389	assert_eq!(
	390	column_counts(
	391	&read_rows(&b"foo\n bar\n baz\n"[..])
	392	.collect::<Result<Vec<_>, _>>()
	393	.unwrap()
	394	),
	395	vec![(1, String::from("bar")), (1, String::from("baz"))]
	396	);
	397	assert_eq!(
	398	column_counts(
	399	&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..])
	400	.collect::<Result<Vec<_>, _>>()
	401	.unwrap()
	402	),
	403	vec![(2, String::from("baz")), (1, String::from("bar"))]
	404	);
	405	assert_eq!(
	406	column_counts(
	407	&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..])
	408	.collect::<Result<Vec<_>, _>>()
	409	.unwrap()
	410	),
	411	vec![(2, String::from("baz")), (1, String::from("bar"))]
	412	);
	413	assert_eq!(
	414	column_counts(
	415	&read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..])
	416	.collect::<Result<Vec<_>, _>>()
	417	.unwrap()
	418	),
	419	vec![(2, String::from("baz")), (1, String::from("bar"))]
	420	);
	421	}
	422
	423	#[test]
	424	fn test_render_cell() {
	425	assert_eq!(
	426	render_cell(
	427	"foo",
	428	&RowInput {
	429	label: "nope",
	430	entries: vec![]
	431	}
	432	),
	433	HTML::from("<td class=\"\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
	434	);
	435	assert_eq!(
	436	render_cell(
	437	"foo",
	438	&RowInput {
	439	label: "nope",
	440	entries: vec![Entry::from("bar")]
	441	}
	442	),
	443	HTML::from("<td class=\"\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
	444	);
	445	assert_eq!(
	446	render_cell(
	447	"foo",
	448	&RowInput {
	449	label: "nope",
	450	entries: vec![Entry::from("foo")]
	451	}
	452	),
	453	HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\"></td>")
	454	);
	455	assert_eq!(
	456	render_cell(
	457	"foo",
	458	&RowInput {
	459	label: "nope",
	460	entries: vec![Entry::from("foo"), Entry::from("foo")]
	461	}
	462	),
	463	HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">2</td>")
	464	);
	465	assert_eq!(
	466	render_cell(
	467	"foo",
	468	&RowInput {
	469	label: "nope",
	470	entries: vec![Entry::from("foo: 5"), Entry::from("foo: 10")]
	471	}
	472	),
	473	HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">5 10</td>")
	474	);
	475	assert_eq!(
	476	render_cell(
	477	"foo",
	478	&RowInput {
	479	label: "nope",
	480	entries: vec![Entry::from("foo: 5"), Entry::from("foo")]
	481	}
	482	),
	483	HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','foo')\" onmouseout=\"ch2('nope','foo')\">5 ✓</td>")
	484	);
	485	assert_eq!(
	486	render_cell(
	487	"heart",
	488	&RowInput {
	489	label: "nope",
	490	entries: vec![Entry::from("heart: <3")]
	491	}
	492	),
	493	HTML::from("<td class=\"yes\" onmouseover=\"h2('nope','heart')\" onmouseout=\"ch2('nope','heart')\"><3</td>")
	494	);
	495	assert_eq!(
	496	render_cell(
	497	"foo",
	498	&RowInput {
	499	label: "bob's",
	500	entries: vec![Entry::from("foo")]
	501	}
	502	),
	503	HTML::from("<td class=\"yes\" onmouseover=\"h2('bob's','foo')\" onmouseout=\"ch2('bob's','foo')\"></td>")
	504	);
	505	}
	506	}