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Trim whitespace when parsing entries
[tablify] / src / lib.rs
diff --git a/src/lib.rs b/src/lib.rs
index 8d60eb8ba898b65d93f3e50c00d859206f11ba36..5b06e705aecaaac8fd071f064dd63d731038687d 100644 (file)
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,10 +2,66 @@ use std::collections::{HashMap, HashSet};
 use std::io::BufRead;
 use std::iter::Iterator;
 
 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>
+    /* 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: 8em; 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.numeric { text-align: right; }
+    td.yes { border: thin solid gray; background-color: gray; }
+    td.spacer { border: none; }
+    /* 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; }
+    img { height: 1.2em; }
+  </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(Debug, PartialEq, Eq, Hash)]
+struct Entry {
+    col: String,
+    instance: Option<String>,
+}
+impl From<&str> for Entry {
+    fn from(value: &str) -> Entry {
+        match value.split_once(':') {
+            None => Entry {
+                col: String::from(value),
+                instance: None,
+            },
+            Some((col, instance)) => Entry {
+                col: String::from(col.trim()),
+                instance: Some(String::from(instance.trim())),
+            },
+        }
+    }
+}
+
 #[derive(Debug, PartialEq, Eq)]
 struct RowInput {
     label: String,
 #[derive(Debug, PartialEq, Eq)]
 struct RowInput {
     label: String,
-    entries: Vec<String>,
+    entries: Vec<Entry>,
 }
 
 struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
 }
 
 struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
@@ -42,7 +98,7 @@ impl<Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader
                             n + 1
                         ))))
                     }
                             n + 1
                         ))))
                     }
-                    Some(ref mut row) => row.entries.push(String::from(line.trim())),
+                    Some(ref mut row) => row.entries.push(Entry::from(line.trim())),
                 },
                 Some((_, Ok(line))) => {
                     let prev = std::mem::take(&mut self.row);
                 },
                 Some((_, Ok(line))) => {
                     let prev = std::mem::take(&mut self.row);
@@ -66,9 +122,15 @@ fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<RowInput,
 fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
     let mut counts: Vec<_> = rows
         .iter()
 fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
     let mut counts: Vec<_> = rows
         .iter()
-        .flat_map(|r| r.entries.iter().collect::<HashSet<_>>().into_iter())
-        .fold(HashMap::new(), |mut cs, e| {
-            cs.entry(String::from(e))
+        .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
                 .and_modify(|n| *n += 1)
                 .or_insert(1);
             cs
@@ -89,13 +151,38 @@ fn column_counts(rows: &[RowInput]) -> Vec<(usize, String)> {
 pub fn tablify(input: impl std::io::Read) -> Result<String, std::io::Error> {
     let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
     let _columns = column_counts(&rows);
 pub fn tablify(input: impl std::io::Read) -> Result<String, std::io::Error> {
     let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
     let _columns = column_counts(&rows);
-    Ok(String::from("Hello, world!"))
+    Ok(String::from(HEADER) + "Hello, world!" + FOOTER)
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
+    #[test]
+    fn test_parse_entry() {
+        assert_eq!(
+            Entry::from("foo"),
+            Entry {
+                col: String::from("foo"),
+                instance: None
+            }
+        );
+        assert_eq!(
+            Entry::from("foo:bar"),
+            Entry {
+                col: String::from("foo"),
+                instance: Some(String::from("bar"))
+            }
+        );
+        assert_eq!(
+            Entry::from("foo: bar"),
+            Entry {
+                col: String::from("foo"),
+                instance: Some(String::from("bar"))
+            }
+        );
+    }
+
     #[test]
     fn test_read_rows() {
         assert_eq!(
     #[test]
     fn test_read_rows() {
         assert_eq!(
@@ -129,7 +216,7 @@ mod tests {
             read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
             read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
-                entries: vec![String::from("bar")]
+                entries: vec![Entry::from("bar")]
             }]
         );
         assert_eq!(
             }]
         );
         assert_eq!(
@@ -138,7 +225,7 @@ mod tests {
                 .collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
                 .collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
-                entries: vec![String::from("bar"), String::from("baz")]
+                entries: vec![Entry::from("bar"), Entry::from("baz")]
             }]
         );
         assert_eq!(
             }]
         );
         assert_eq!(
@@ -177,7 +264,7 @@ mod tests {
                 .collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
                 .collect::<Vec<_>>(),
             vec![RowInput {
                 label: String::from("foo"),
-                entries: vec![String::from("bar")]
+                entries: vec![Entry::from("bar")]
             }]
         );
 
             }]
         );
 
@@ -216,5 +303,13 @@ mod tests {
             ),
             vec![(1, String::from("bar")), (2, String::from("baz"))]
         );
             ),
             vec![(1, String::from("bar")), (2, String::from("baz"))]
         );
+        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![(1, String::from("bar")), (2, String::from("baz"))]
+        );
     }
 }
     }
 }
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