X-Git-Url: http://git.scottworley.com/tablify/blobdiff_plain/f272e502c4d1e2e33ab1e9fe460df69ff8f8ccd2..12e913005080a9f60750d807c220a58704429361:/src/lib.rs
diff --git a/src/lib.rs b/src/lib.rs
index e90f66b..dbcfc7b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,22 +1,126 @@
-#[cfg(test)]
+use std::borrow::ToOwned;
use std::collections::HashMap;
-#[cfg(test)]
+use std::fmt::Write;
use std::io::BufRead;
-#[cfg(test)]
use std::iter::Iterator;
+pub struct Config {
+ pub column_threshold: usize,
+}
+
+const HEADER: &str = r#"
+
+
+
+
+
+
+
+
+
+
+"#;
+const FOOTER: &str = "
+
+
+";
+
+#[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 for HTML {
+ fn from_iter(iter: T) -> HTML
+ where
+ T: IntoIterator- ,
+ {
+ HTML(iter.into_iter().map(|html| html.0).collect::())
+ }
+}
+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)]
-struct RowInput {
+enum InputLine<'a> {
+ Blank,
+ RowHeader(&'a str),
+ Entry(&'a str, Option<&'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 !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: Vec,
+ entries: HashMap>>,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+enum Rowlike {
+ Row(Row),
+ Spacer,
}
struct Reader>> {
input: std::iter::Enumerate,
- row: Option,
+ row: Option
,
}
impl>> Reader {
- #[cfg(test)]
fn new(input: Input) -> Self {
Self {
input: input.enumerate(),
@@ -25,181 +129,512 @@ impl>> Reader {
}
}
impl>> Iterator for Reader {
- type Item = Result;
+ type Item = Result;
fn next(&mut self) -> Option {
loop {
- match self
- .input
- .next()
- .map(|(n, r)| (n, r.map(|line| String::from(line.trim_end()))))
- {
- None => return Ok(std::mem::take(&mut self.row)).transpose(),
+ 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((_, Ok(line))) if line.is_empty() && self.row.is_some() => {
- return Ok(std::mem::take(&mut self.row)).transpose()
- }
- Some((_, Ok(line))) if line.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
- ))))
+ Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
+ InputLine::Blank if self.row.is_some() => {
+ return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose()
}
- Some(ref mut row) => row.entries.push(String::from(line.trim())),
- },
- Some((_, Ok(line))) => {
- let prev = std::mem::take(&mut self.row);
- self.row = Some(RowInput {
- label: line,
- entries: vec![],
- });
- if prev.is_some() {
- return Ok(prev).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();
+ }
}
- }
+ },
}
}
}
}
-#[cfg(test)]
-fn read_rows(input: impl std::io::Read) -> impl Iterator- > {
- Reader::new(std::io::BufReader::new(input).lines())
+fn read_rows(input: impl std::io::Read) -> Result, std::io::Error> {
+ Reader::new(std::io::BufReader::new(input).lines()).collect::, _>>()
}
-#[cfg(test)]
-fn column_counts(rows: &[RowInput]) -> HashMap {
- rows.iter()
- .flat_map(|r| r.entries.iter())
- .fold(HashMap::new(), |mut counts, e| {
- counts
- .entry(String::from(e))
- .and_modify(|c| *c += 1)
+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);
- counts
+ 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 {
+ column_counts(rows)
+ .into_iter()
+ .filter_map(|(n, col)| (n >= config.column_threshold).then_some(col))
+ .collect()
+}
+
+fn render_one_instance(instance: &Option) -> HTML {
+ match instance {
+ None => HTML::from("â"),
+ Some(instance) => HTML::escape(instance.as_ref()),
+ }
}
-pub fn tablify(_input: &impl std::io::Read) -> String {
- String::from("Hello, world!")
+fn render_instances(instances: &[Option]) -> 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::>()
+ .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>> = 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#"
| {contents} | "#
+ ))
+}
+
+fn render_leftover(notcol: &str, instances: &[Option]) -> 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::>()
+ .join(", "),
+ )
+}
+
+fn render_row(columns: &[String], rowlike: &mut Rowlike) -> HTML {
+ match rowlike {
+ Rowlike::Spacer => HTML::from(" |
|---|
\n"),
+ Rowlike::Row(row) => {
+ let row_label = HTML::escape(row.label.as_ref());
+ let cells = columns
+ .iter()
+ .map(|col| render_cell(col, row))
+ .collect::();
+ let leftovers = render_all_leftovers(row);
+ HTML(format!(
+ "| {row_label} | {cells}{leftovers} |
|---|
\n"
+ ))
+ }
+ }
+}
+
+fn render_column_headers(columns: &[String]) -> HTML {
+ HTML(
+ String::from(r#" | "#)
+ + &columns.iter().fold(String::new(), |mut acc, col| {
+ let col_header = HTML::escape(col.as_ref());
+ write!(
+ &mut acc,
+ r#""#
+ )
+ .unwrap();
+ acc
+ })
+ + "
|---|
\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(config: &Config, input: impl std::io::Read) -> Result {
+ let rows = read_rows(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::()
+ )))
}
#[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"))
+ );
+ }
+
#[test]
fn test_read_rows() {
assert_eq!(
- read_rows(&b"foo"[..]).flatten().collect::>(),
- vec![RowInput {
- label: String::from("foo"),
- entries: vec![]
- }]
+ read_rows(&b"foo"[..]).unwrap(),
+ vec![Rowlike::Row(Row {
+ label: "foo".to_owned(),
+ entries: HashMap::new(),
+ })]
);
assert_eq!(
- read_rows(&b"bar"[..]).flatten().collect::>(),
- vec![RowInput {
- label: String::from("bar"),
- entries: vec![]
- }]
+ 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![
- RowInput {
- label: String::from("foo"),
- entries: vec![]
- },
- RowInput {
- label: String::from("bar"),
- entries: 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"[..]).flatten().collect::>(),
- vec![RowInput {
- label: String::from("foo"),
- entries: vec![String::from("bar")]
- }]
+ 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::>(),
- vec![RowInput {
- label: String::from("foo"),
- entries: vec![String::from("bar"), String::from("baz")]
- }]
+ 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"[..])
- .flatten()
- .collect::>(),
+ read_rows(&b"foo\n\nbar\n"[..]).unwrap(),
vec![
- RowInput {
- label: String::from("foo"),
- entries: vec![]
- },
- RowInput {
- label: String::from("bar"),
- entries: 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 \nbar\n"[..])
- .flatten()
- .collect::>(),
+ read_rows(&b"foo\n\n\nbar\n"[..]).unwrap(),
vec![
- RowInput {
- label: String::from("foo"),
- entries: vec![]
- },
- RowInput {
- label: String::from("bar"),
- entries: 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 bar \n"[..])
- .flatten()
- .collect::>(),
- vec![RowInput {
- label: String::from("foo"),
- entries: vec![String::from("bar")]
- }]
+ 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"[..]).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_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\n baz\n"[..])
- .collect::, _>>()
- .unwrap()
+ &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]).unwrap()
),
- HashMap::from([(String::from("bar"), 1), (String::from("baz"), 1)])
+ vec![(2, String::from("baz")), (1, String::from("bar"))]
);
+ }
+
+ #[test]
+ fn test_render_cell() {
assert_eq!(
- column_counts(
- &read_rows(&b"foo\n bar\n baz\nquux\n baz"[..])
- .collect::, _>>()
- .unwrap()
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::new(),
+ }
+ ),
+ HTML::from(
+ r#" | "#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("bar".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#" | "#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#" | "#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "nope".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
+ }
+ ),
+ HTML::from(
+ r#"2 | "#
+ )
+ );
+ 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#"5 10 | "#
+ )
+ );
+ 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#"5 â | "#
+ )
+ );
+ 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#"<3 | "#
+ )
+ );
+ assert_eq!(
+ render_cell(
+ "foo",
+ &mut Row {
+ label: "bob's".to_owned(),
+ entries: HashMap::from([("foo".to_owned(), vec![None])]),
+ }
+ ),
+ HTML::from(
+ r#" | "#
+ )
+ );
+ 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])]),
+ })
),
- HashMap::from([(String::from("bar"), 1), (String::from("baz"), 2)])
+ HTML::from(
+ r#"| nope | | bar |
|---|
+"#
+ )
);
}
}