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[tablify] / src / lib.rs
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1use std::borrow::ToOwned;
2use std::collections::HashMap;
3use std::fmt::Write;
4use std::io::BufRead;
5use std::iter::Iterator;
6
7pub struct Config {}
8
9const HEADER: &str = r#"<!DOCTYPE html>
10<html>
11<head>
12 <meta charset="utf-8">
13 <meta name="viewport" content="width=device-width, initial-scale=1">
14 <style>
15 td { text-align: center; }
16 /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
17 th, td { white-space: nowrap; }
18 th { text-align: left; font-weight: normal; }
19 table { border-collapse: collapse }
20 tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
21 tr.key > th > div { width: 1em; }
22 tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
23 td { border: thin solid gray; }
24 td.yes { border: thin solid gray; background-color: #ddd; }
25 /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
26 .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
27 </style>
28 <script>
29 function highlight(id) { const e = document.getElementById(id); if (e) { e.classList.add( "highlight"); } }
30 function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove("highlight"); } }
31 function h2(a, b) { highlight(a); highlight(b); }
32 function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
33 </script>
34</head>
35<body>
36 <table>
37 <tbody>
38"#;
39const FOOTER: &str = " </tbody>
40 </table>
41</body>
42</html>";
43
44#[derive(PartialEq, Eq, Debug)]
45pub struct HTML(String);
46impl HTML {
47 fn escape(value: &str) -> HTML {
48 let mut escaped: String = String::new();
49 for c in value.chars() {
50 match c {
51 '>' => escaped.push_str("&gt;"),
52 '<' => escaped.push_str("&lt;"),
53 '\'' => escaped.push_str("&#39;"),
54 '"' => escaped.push_str("&quot;"),
55 '&' => escaped.push_str("&amp;"),
56 ok_c => escaped.push(ok_c),
57 }
58 }
59 HTML(escaped)
60 }
61}
62impl From<&str> for HTML {
63 fn from(value: &str) -> HTML {
64 HTML(String::from(value))
65 }
66}
67impl FromIterator<HTML> for HTML {
68 fn from_iter<T>(iter: T) -> HTML
69 where
70 T: IntoIterator<Item = HTML>,
71 {
72 HTML(iter.into_iter().map(|html| html.0).collect::<String>())
73 }
74}
75impl std::fmt::Display for HTML {
76 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
77 write!(f, "{}", self.0)
78 }
79}
80
81#[derive(Debug, PartialEq, Eq)]
82enum InputLine<'a> {
83 Blank,
84 RowHeader(&'a str),
85 Entry(&'a str, Option<&'a str>),
86}
87impl<'a> From<&'a str> for InputLine<'a> {
88 fn from(value: &'a str) -> InputLine<'a> {
89 let trimmed = value.trim_end();
90 if trimmed.is_empty() {
91 InputLine::Blank
92 } else if !trimmed.starts_with(' ') {
93 InputLine::RowHeader(value.trim())
94 } else {
95 match value.split_once(':') {
96 None => InputLine::Entry(value.trim(), None),
97 Some((col, instance)) => InputLine::Entry(col.trim(), Some(instance.trim())),
98 }
99 }
100 }
101}
102
103#[derive(Debug, PartialEq, Eq)]
104struct Row {
105 label: String,
106 entries: HashMap<String, Vec<Option<String>>>,
107}
108
109struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
110 input: std::iter::Enumerate<Input>,
111 row: Option<Row>,
112}
113impl<Input: Iterator<Item = Result<String, std::io::Error>>> Reader<Input> {
114 fn new(input: Input) -> Self {
115 Self {
116 input: input.enumerate(),
117 row: None,
118 }
119 }
120}
121impl<Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<Input> {
122 type Item = Result<Row, std::io::Error>;
123 fn next(&mut self) -> Option<Self::Item> {
124 loop {
125 match self.input.next() {
126 None => return Ok(std::mem::take(&mut self.row)).transpose(),
127 Some((_, Err(e))) => return Some(Err(e)),
128 Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
129 InputLine::Blank if self.row.is_some() => {
130 return Ok(std::mem::take(&mut self.row)).transpose()
131 }
132 InputLine::Blank => {}
133 InputLine::Entry(col, instance) => match &mut self.row {
134 None => {
135 return Some(Err(std::io::Error::other(format!(
136 "{}: Entry with no header",
137 n + 1
138 ))))
139 }
140 Some(ref mut row) => {
141 row.entries
142 .entry(col.to_owned())
143 .and_modify(|is| is.push(instance.map(ToOwned::to_owned)))
144 .or_insert_with(|| vec![instance.map(ToOwned::to_owned)]);
145 }
146 },
147 InputLine::RowHeader(row) => {
148 let prev = std::mem::take(&mut self.row);
149 self.row = Some(Row {
150 label: row.to_owned(),
151 entries: HashMap::new(),
152 });
153 if prev.is_some() {
154 return Ok(prev).transpose();
155 }
156 }
157 },
158 }
159 }
160 }
161}
162
163fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<Row, std::io::Error>> {
164 Reader::new(std::io::BufReader::new(input).lines())
165}
166
167fn column_counts(rows: &[Row]) -> Vec<(usize, String)> {
168 let mut counts: Vec<_> = rows
169 .iter()
170 .flat_map(|r| r.entries.keys())
171 .fold(HashMap::new(), |mut cs, col| {
172 cs.entry(col.to_owned())
173 .and_modify(|n| *n += 1)
174 .or_insert(1);
175 cs
176 })
177 .into_iter()
178 .map(|(col, n)| (n, col))
179 .collect();
180 counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
181 counts
182}
183fn column_order(rows: &[Row]) -> Vec<String> {
184 column_counts(rows)
185 .into_iter()
186 .map(|(_, col)| col)
187 .collect()
188}
189
190fn render_instance(instance: &Option<String>) -> HTML {
191 match instance {
192 None => HTML::from("✓"),
193 Some(instance) => HTML::escape(instance.as_ref()),
194 }
195}
196
197fn render_cell(col: &str, row: &mut Row) -> HTML {
198 let row_label = HTML::escape(row.label.as_ref());
199 let col_label = HTML::escape(col);
200 let instances: Option<&Vec<Option<String>>> = row.entries.get(col);
201 let class = HTML::from(if instances.is_none() { "" } else { "yes" });
202 let all_empty = instances
203 .iter()
204 .flat_map(|is| is.iter())
205 .all(Option::is_none);
206 let contents = if instances.is_none() || (all_empty && instances.unwrap().len() == 1) {
207 HTML::from("")
208 } else if all_empty {
209 HTML(format!("{}", instances.unwrap().len()))
210 } else {
211 HTML(
212 instances
213 .unwrap()
214 .iter()
215 .map(render_instance)
216 .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
217 .collect::<Vec<_>>()
218 .join(" "),
219 )
220 };
221 row.entries.remove(col);
222 HTML(format!(
223 r#"<td class="{class}" onmouseover="h2('{row_label}','{col_label}')" onmouseout="ch2('{row_label}','{col_label}')">{contents}</td>"#
224 ))
225}
226
227fn render_row(columns: &[String], row: &mut Row) -> HTML {
228 let row_label = HTML::escape(row.label.as_ref());
229 let cells = columns
230 .iter()
231 .map(|col| render_cell(col, row))
232 .collect::<HTML>();
233 HTML(format!(
234 "<tr><th id=\"{row_label}\">{row_label}</th>{cells}</tr>\n"
235 ))
236}
237
238fn render_column_headers(columns: &[String]) -> HTML {
239 HTML(
240 String::from(r#"<tr class="key"><th></th>"#)
241 + &columns.iter().fold(String::new(), |mut acc, col| {
242 let col_header = HTML::escape(col.as_ref());
243 write!(
244 &mut acc,
245 r#"<th id="{col_header}"><div><div>{col_header}</div></div></th>"#
246 )
247 .unwrap();
248 acc
249 })
250 + "</tr>\n",
251 )
252}
253
254/// # Errors
255///
256/// Will return `Err` if
257/// * there's an i/o error while reading `input`
258/// * the log has invalid syntax:
259/// * an indented line with no preceding non-indented line
260pub fn tablify(config: &Config, input: impl std::io::Read) -> Result<HTML, std::io::Error> {
261 let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
262 let columns = column_order(&rows);
263 Ok(HTML(format!(
264 "{HEADER}{}{}{FOOTER}",
265 render_column_headers(&columns),
266 rows.into_iter()
267 .map(|mut r| render_row(&columns, &mut r))
268 .collect::<HTML>()
269 )))
270}
271
272#[cfg(test)]
273mod tests {
274 use super::*;
275
276 #[test]
277 fn test_parse_line() {
278 assert_eq!(InputLine::from(""), InputLine::Blank);
279 assert_eq!(InputLine::from(" "), InputLine::Blank);
280 assert_eq!(InputLine::from("foo"), InputLine::RowHeader("foo"));
281 assert_eq!(InputLine::from("foo "), InputLine::RowHeader("foo"));
282 assert_eq!(InputLine::from(" foo"), InputLine::Entry("foo", None));
283 assert_eq!(
284 InputLine::from(" foo:bar"),
285 InputLine::Entry("foo", Some("bar"))
286 );
287 assert_eq!(
288 InputLine::from(" foo: bar"),
289 InputLine::Entry("foo", Some("bar"))
290 );
291 assert_eq!(
292 InputLine::from(" foo: bar "),
293 InputLine::Entry("foo", Some("bar"))
294 );
295 assert_eq!(
296 InputLine::from(" foo: bar "),
297 InputLine::Entry("foo", Some("bar"))
298 );
299 assert_eq!(
300 InputLine::from(" foo : bar "),
301 InputLine::Entry("foo", Some("bar"))
302 );
303 }
304
305 #[test]
306 fn test_read_rows() {
307 assert_eq!(
308 read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
309 vec![Row {
310 label: "foo".to_owned(),
311 entries: HashMap::new(),
312 }]
313 );
314 assert_eq!(
315 read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
316 vec![Row {
317 label: "bar".to_owned(),
318 entries: HashMap::new(),
319 }]
320 );
321 assert_eq!(
322 read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
323 vec![
324 Row {
325 label: "foo".to_owned(),
326 entries: HashMap::new(),
327 },
328 Row {
329 label: "bar".to_owned(),
330 entries: HashMap::new(),
331 }
332 ]
333 );
334 assert_eq!(
335 read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
336 vec![Row {
337 label: "foo".to_owned(),
338 entries: HashMap::from([("bar".to_owned(), vec![None])]),
339 }]
340 );
341 assert_eq!(
342 read_rows(&b"foo\n bar\n baz\n"[..])
343 .flatten()
344 .collect::<Vec<_>>(),
345 vec![Row {
346 label: "foo".to_owned(),
347 entries: HashMap::from([
348 ("bar".to_owned(), vec![None]),
349 ("baz".to_owned(), vec![None])
350 ]),
351 }]
352 );
353 assert_eq!(
354 read_rows(&b"foo\n\nbar\n"[..])
355 .flatten()
356 .collect::<Vec<_>>(),
357 vec![
358 Row {
359 label: "foo".to_owned(),
360 entries: HashMap::new(),
361 },
362 Row {
363 label: "bar".to_owned(),
364 entries: HashMap::new(),
365 }
366 ]
367 );
368 assert_eq!(
369 read_rows(&b"foo\n \nbar\n"[..])
370 .flatten()
371 .collect::<Vec<_>>(),
372 vec![
373 Row {
374 label: "foo".to_owned(),
375 entries: HashMap::new(),
376 },
377 Row {
378 label: "bar".to_owned(),
379 entries: HashMap::new(),
380 }
381 ]
382 );
383 assert_eq!(
384 read_rows(&b"foo \n bar \n"[..])
385 .flatten()
386 .collect::<Vec<_>>(),
387 vec![Row {
388 label: "foo".to_owned(),
389 entries: HashMap::from([("bar".to_owned(), vec![None])]),
390 }]
391 );
392
393 let bad = read_rows(&b" foo"[..]).next().unwrap();
394 assert!(bad.is_err());
395 assert!(format!("{bad:?}").contains("1: Entry with no header"));
396
397 let bad2 = read_rows(&b"foo\n\n bar"[..]).nth(1).unwrap();
398 assert!(bad2.is_err());
399 assert!(format!("{bad2:?}").contains("3: Entry with no header"));
400 }
401
402 #[test]
403 fn test_column_counts() {
404 assert_eq!(
405 column_counts(
406 &read_rows(&b"foo\n bar\n baz\n"[..])
407 .collect::<Result<Vec<_>, _>>()
408 .unwrap()
409 ),
410 vec![(1, String::from("bar")), (1, String::from("baz"))]
411 );
412 assert_eq!(
413 column_counts(
414 &read_rows(&b"foo\n bar\n baz\nquux\n baz"[..])
415 .collect::<Result<Vec<_>, _>>()
416 .unwrap()
417 ),
418 vec![(2, String::from("baz")), (1, String::from("bar"))]
419 );
420 assert_eq!(
421 column_counts(
422 &read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..])
423 .collect::<Result<Vec<_>, _>>()
424 .unwrap()
425 ),
426 vec![(2, String::from("baz")), (1, String::from("bar"))]
427 );
428 assert_eq!(
429 column_counts(
430 &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..])
431 .collect::<Result<Vec<_>, _>>()
432 .unwrap()
433 ),
434 vec![(2, String::from("baz")), (1, String::from("bar"))]
435 );
436 }
437
438 #[test]
439 fn test_render_cell() {
440 assert_eq!(
441 render_cell(
442 "foo",
443 &mut Row {
444 label: "nope".to_owned(),
445 entries: HashMap::new(),
446 }
447 ),
448 HTML::from(
449 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
450 )
451 );
452 assert_eq!(
453 render_cell(
454 "foo",
455 &mut Row {
456 label: "nope".to_owned(),
457 entries: HashMap::from([("bar".to_owned(), vec![None])]),
458 }
459 ),
460 HTML::from(
461 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
462 )
463 );
464 assert_eq!(
465 render_cell(
466 "foo",
467 &mut Row {
468 label: "nope".to_owned(),
469 entries: HashMap::from([("foo".to_owned(), vec![None])]),
470 }
471 ),
472 HTML::from(
473 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
474 )
475 );
476 assert_eq!(
477 render_cell(
478 "foo",
479 &mut Row {
480 label: "nope".to_owned(),
481 entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
482 }
483 ),
484 HTML::from(
485 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">2</td>"#
486 )
487 );
488 assert_eq!(
489 render_cell(
490 "foo",
491 &mut Row {
492 label: "nope".to_owned(),
493 entries: HashMap::from([(
494 "foo".to_owned(),
495 vec![Some("5".to_owned()), Some("10".to_owned())]
496 )]),
497 }
498 ),
499 HTML::from(
500 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 10</td>"#
501 )
502 );
503 assert_eq!(
504 render_cell(
505 "foo",
506 &mut Row {
507 label: "nope".to_owned(),
508 entries: HashMap::from([("foo".to_owned(), vec![Some("5".to_owned()), None])]),
509 }
510 ),
511 HTML::from(
512 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 ✓</td>"#
513 )
514 );
515 assert_eq!(
516 render_cell(
517 "heart",
518 &mut Row {
519 label: "nope".to_owned(),
520 entries: HashMap::from([("heart".to_owned(), vec![Some("<3".to_owned())])]),
521 }
522 ),
523 HTML::from(
524 r#"<td class="yes" onmouseover="h2('nope','heart')" onmouseout="ch2('nope','heart')">&lt;3</td>"#
525 )
526 );
527 assert_eq!(
528 render_cell(
529 "foo",
530 &mut Row {
531 label: "bob's".to_owned(),
532 entries: HashMap::from([("foo".to_owned(), vec![None])]),
533 }
534 ),
535 HTML::from(
536 r#"<td class="yes" onmouseover="h2('bob&#39;s','foo')" onmouseout="ch2('bob&#39;s','foo')"></td>"#
537 )
538 );
539 let mut r = Row {
540 label: "nope".to_owned(),
541 entries: HashMap::from([
542 ("foo".to_owned(), vec![None]),
543 ("baz".to_owned(), vec![None]),
544 ]),
545 };
546 assert_eq!(r.entries.len(), 2);
547 render_cell("foo", &mut r);
548 assert_eq!(r.entries.len(), 1);
549 render_cell("bar", &mut r);
550 assert_eq!(r.entries.len(), 1);
551 render_cell("baz", &mut r);
552 assert_eq!(r.entries.len(), 0);
553 }
554
555 #[test]
556 fn test_render_row() {
557 assert_eq!(
558 render_row(
559 &["foo".to_owned()],
560 &mut Row {
561 label: "nope".to_owned(),
562 entries: HashMap::from([("bar".to_owned(), vec![None])]),
563 }
564 ),
565 HTML::from(
566 r#"<tr><th id="nope">nope</th><td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td></tr>
567"#
568 )
569 );
570 }
571}
Summarize a text log as an HTML table