+use std::borrow::ToOwned;
+use std::collections::HashMap;
+use std::fmt::Write;
+use std::io::BufRead;
+use std::iter::Iterator;
+
+#[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#"<!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; }
+ 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; }
+ tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
+ td { border: thin solid gray; }
+ td.leftover { text-align: left; border: none; padding-left: .4em; }
+ 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(">"),
+ '<' => escaped.push_str("<"),
+ '\'' => escaped.push_str("'"),
+ '"' => escaped.push_str("""),
+ '&' => escaped.push_str("&"),
+ 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)]
+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 {
+ match value.split_once(':') {
+ None => InputLine::Entry(value.trim(), None),
+ Some((col, instance)) => InputLine::Entry(col.trim(), Some(instance.trim())),
+ }
+ }
+ }
+}
+
+#[derive(Debug, PartialEq, Eq)]
+struct Row {
+ label: String,
+ entries: HashMap<String, Vec<Option<String>>>,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+enum Rowlike {
+ Row(Row),
+ Spacer,
+}
+
+struct Reader<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> {
+ input: std::iter::Enumerate<Input>,
+ row: Option<Row>,
+ config: &'cfg mut Config,
+}
+impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'cfg, Input> {
+ fn new(config: &'cfg mut Config, input: Input) -> Self {
+ Self {
+ input: input.enumerate(),
+ row: None,
+ config,
+ }
+ }
+}
+impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator
+ for Reader<'cfg, Input>
+{
+ type Item = Result<Rowlike, std::io::Error>;
+ fn next(&mut self) -> Option<Self::Item> {
+ loop {
+ match self.input.next() {
+ 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 => return Some(Ok(Rowlike::Spacer)),
+ InputLine::Entry(col, instance) => match &mut self.row {
+ None => {
+ return Some(Err(std::io::Error::other(format!(
+ "{}: Entry with no header",
+ n + 1
+ ))))
+ }
+ Some(ref mut row) => {
+ row.entries
+ .entry(col.to_owned())
+ .and_modify(|is| is.push(instance.map(ToOwned::to_owned)))
+ .or_insert_with(|| vec![instance.map(ToOwned::to_owned)]);
+ }
+ },
+ InputLine::RowHeader(row) => {
+ let prev = std::mem::take(&mut self.row);
+ self.row = Some(Row {
+ label: row.to_owned(),
+ entries: HashMap::new(),
+ });
+ if prev.is_some() {
+ return Ok(prev.map(Rowlike::Row)).transpose();
+ }
+ }
+ },
+ }
+ }
+ }
+}
+
+fn read_input(input: impl std::io::Read) -> Result<(Vec<Rowlike>, 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::<Result<Vec<_>, _>>()
+ .map(|rows| (rows, config))
+}
+
+fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> {
+ let empty = HashMap::new();
+ let mut counts: Vec<_> = rows
+ .iter()
+ .flat_map(|rl| match rl {
+ Rowlike::Row(r) => r.entries.keys(),
+ Rowlike::Spacer => empty.keys(),
+ })
+ .fold(HashMap::new(), |mut cs, col| {
+ cs.entry(col.to_owned())
+ .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(config: &Config, rows: &[Rowlike]) -> Vec<String> {
+ column_counts(rows)
+ .into_iter()
+ .filter_map(|(n, col)| (n >= config.column_threshold).then_some(col))
+ .collect()
+}
+
+fn render_one_instance(instance: &Option<String>) -> HTML {
+ match instance {
+ None => HTML::from("✓"),
+ Some(instance) => HTML::escape(instance.as_ref()),
+ }
+}
+
+fn render_instances(instances: &[Option<String>]) -> HTML {
+ let all_empty = instances.iter().all(Option::is_none);
+ if all_empty && instances.len() == 1 {
+ HTML::from("")
+ } else if all_empty {
+ HTML(format!("{}", instances.len()))
+ } else {
+ HTML(
+ instances
+ .iter()
+ .map(render_one_instance)
+ .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
+ .collect::<Vec<_>>()
+ .join(" "),
+ )
+ }
+}
+
+fn render_cell(col: &str, row: &mut Row) -> HTML {
+ let row_label = HTML::escape(row.label.as_ref());
+ let col_label = HTML::escape(col);
+ let instances: Option<&Vec<Option<String>>> = row.entries.get(col);
+ let class = HTML::from(if instances.is_none() { "" } else { "yes" });
+ let contents = match instances {
+ None => HTML::from(""),
+ Some(is) => render_instances(is),
+ };
+ row.entries.remove(col);
+ HTML(format!(
+ r#"<td class="{class}" onmouseover="h2('{row_label}','{col_label}')" onmouseout="ch2('{row_label}','{col_label}')">{contents}</td>"#
+ ))
+}
+
+fn render_leftover(notcol: &str, instances: &[Option<String>]) -> HTML {
+ let label = HTML::escape(notcol);
+ let rest = render_instances(instances);
+ if rest == HTML::from("") {
+ HTML(format!("{label}"))
+ } else {
+ HTML(format!("{label}: {rest}"))
+ }
+}
+
+fn render_all_leftovers(row: &Row) -> HTML {
+ let mut order: Vec<_> = row.entries.keys().collect();
+ order.sort_unstable();
+ HTML(
+ order
+ .into_iter()
+ .map(|notcol| render_leftover(notcol, row.entries.get(notcol).expect("Key vanished?!")))
+ .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
+ .collect::<Vec<_>>()
+ .join(", "),
+ )
+}
+
+fn render_row(columns: &[String], rowlike: &mut Rowlike) -> HTML {
+ match rowlike {
+ Rowlike::Spacer => HTML::from("<tr><th class=\"spacer_row\"></th></tr>\n"),
+ Rowlike::Row(row) => {
+ let row_label = HTML::escape(row.label.as_ref());
+ let cells = columns
+ .iter()
+ .map(|col| render_cell(col, row))
+ .collect::<HTML>();
+ let leftovers = render_all_leftovers(row);
+ HTML(format!(
+ "<tr><th id=\"{row_label}\">{row_label}</th>{cells}<td class=\"leftover\" onmouseover=\"highlight('{row_label}')\" onmouseout=\"clear_highlight('{row_label}')\">{leftovers}</td></tr>\n"
+ ))
+ }
+ }
+}
+
+fn render_column_headers(columns: &[String]) -> HTML {
+ HTML(
+ String::from(r#"<tr class="key"><th></th>"#)
+ + &columns.iter().fold(String::new(), |mut acc, col| {
+ let col_header = HTML::escape(col.as_ref());
+ write!(
+ &mut acc,
+ r#"<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, config) = read_input(input)?;
+ let columns = column_order(&config, &rows);
+ Ok(HTML(format!(
+ "{HEADER}{}{}{FOOTER}",
+ render_column_headers(&columns),
+ rows.into_iter()
+ .map(|mut r| render_row(&columns, &mut r))
+ .collect::<HTML>()
+ )))
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn test_parse_line() {
+ assert_eq!(InputLine::from(""), InputLine::Blank);
+ assert_eq!(InputLine::from(" "), InputLine::Blank);
+ assert_eq!(InputLine::from("foo"), InputLine::RowHeader("foo"));
+ assert_eq!(InputLine::from("foo "), InputLine::RowHeader("foo"));
+ assert_eq!(InputLine::from(" foo"), InputLine::Entry("foo", None));
+ assert_eq!(
+ InputLine::from(" foo:bar"),
+ InputLine::Entry("foo", Some("bar"))
+ );
+ assert_eq!(
+ InputLine::from(" foo: bar"),
+ InputLine::Entry("foo", Some("bar"))
+ );
+ assert_eq!(
+ InputLine::from(" foo: bar "),
+ InputLine::Entry("foo", Some("bar"))
+ );
+ assert_eq!(
+ InputLine::from(" foo: bar "),
+ InputLine::Entry("foo", Some("bar"))
+ );
+ assert_eq!(
+ InputLine::from(" foo : bar "),
+ InputLine::Entry("foo", Some("bar"))
+ );
+ }
+
+ fn read_rows(input: impl std::io::Read) -> Result<Vec<Rowlike>, std::io::Error> {
+ read_input(input).map(|(rows, _)| rows)
+ }
+ fn read_config(input: impl std::io::Read) -> Result<Config, std::io::Error> {
+ read_input(input).map(|(_, config)| config)
+ }
+ #[test]
+ fn test_read_rows() {
+ assert_eq!(
+ read_rows(&b"foo"[..]).unwrap(),
+ vec![Rowlike::Row(Row {
+ label: "foo".to_owned(),
+ entries: HashMap::new(),
+ })]
+ );
+ assert_eq!(
+ read_rows(&b"bar"[..]).unwrap(),
+ vec![Rowlike::Row(Row {
+ label: "bar".to_owned(),
+ entries: HashMap::new(),
+ })]
+ );
+ assert_eq!(
+ read_rows(&b"foo\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 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"[..]).unwrap(),
+ vec![Rowlike::Row(Row {
+ label: "foo".to_owned(),
+ entries: HashMap::from([
+ ("bar".to_owned(), vec![None]),
+ ("baz".to_owned(), vec![None])
+ ]),
+ })]
+ );
+ assert_eq!(
+ 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(),
+ })
+ ]
+ );
+ assert_eq!(
+ 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 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"[..]);
+ assert!(bad.is_err());
+ assert!(format!("{bad:?}").contains("1: Entry with no header"));
+
+ 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()
+ .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"[..]).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"[..]).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"[..]).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"[..]).unwrap()
+ ),
+ vec![(2, String::from("baz")), (1, String::from("bar"))]
+ );
+ }
+
+ #[test]
+ fn test_render_cell() {
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::new(),
+ }
+ ),
+ HTML::from(
+ r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("bar".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">2</td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([(
+ "foo".to_owned(),
+ vec![Some("5".to_owned()), Some("10".to_owned())]
+ )]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 10</td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![Some("5".to_owned()), None])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 ✓</td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "heart",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("heart".to_owned(), vec![Some("<3".to_owned())])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('nope','heart')" onmouseout="ch2('nope','heart')"><3</td>"#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "bob's".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#"<td class="yes" onmouseover="h2('bob's','foo')" onmouseout="ch2('bob's','foo')"></td>"#
+ )
+ );
+ let mut r = Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([
+ ("foo".to_owned(), vec![None]),
+ ("baz".to_owned(), vec![None]),
+ ]),
+ };
+ assert_eq!(r.entries.len(), 2);
+ render_cell("foo", &mut r);
+ assert_eq!(r.entries.len(), 1);
+ render_cell("bar", &mut r);
+ assert_eq!(r.entries.len(), 1);
+ render_cell("baz", &mut r);
+ assert_eq!(r.entries.len(), 0);
+ }
+
+ #[test]
+ fn test_render_leftovers() {
+ assert_eq!(
+ render_all_leftovers(&Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None])]),
+ }),
+ HTML::from("foo")
+ );
+ assert_eq!(
+ render_all_leftovers(&Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([
+ ("foo".to_owned(), vec![None]),
+ ("bar".to_owned(), vec![None])
+ ]),
+ }),
+ HTML::from("bar, foo")
+ );
+ assert_eq!(
+ render_all_leftovers(&Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([
+ ("foo".to_owned(), vec![None]),
+ ("bar".to_owned(), vec![None, None])
+ ]),
+ }),
+ HTML::from("bar: 2, foo")
+ );
+ }
+
+ #[test]
+ fn test_render_row() {
+ assert_eq!(
+ render_row(
+ &["foo".to_owned()],
+ &mut Rowlike::Row(Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("bar".to_owned(), vec![None])]),
+ })
+ ),
+ HTML::from(
+ r#"<tr><th id="nope">nope</th><td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')">bar</td></tr>
+"#
+ )
+ );
+ }
projects / tablify / blobdiff