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feature: Implement the common-term plot
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,6 @@ | ||
| [package] | ||
| name = "lowcharts" | ||
| version = "0.4.1" | ||
| version = "0.4.2" | ||
| authors = ["JuanLeon Lahoz <[email protected]>"] | ||
| edition = "2018" | ||
| description = "Tool to draw low-resolution graphs in terminal" | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| use std::collections::HashMap; | ||
| use std::fmt; | ||
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| use yansi::Color::{Blue, Green, Red}; | ||
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| #[derive(Debug)] | ||
| pub struct CommonTerms { | ||
| pub terms: HashMap<String, usize>, | ||
| lines: usize, | ||
| } | ||
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| impl CommonTerms { | ||
| pub fn new(lines: usize) -> CommonTerms { | ||
| CommonTerms { | ||
| terms: HashMap::new(), | ||
| lines, | ||
| } | ||
| } | ||
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| pub fn observe(&mut self, term: String) { | ||
| *self.terms.entry(term).or_insert(0) += 1 | ||
| } | ||
| } | ||
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| impl fmt::Display for CommonTerms { | ||
| fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | ||
| let width = f.width().unwrap_or(100); | ||
| let mut counts: Vec<(&String, &usize)> = self.terms.iter().collect(); | ||
| if counts.is_empty() { | ||
| writeln!(f, "No data")?; | ||
| return Ok(()); | ||
| } | ||
| counts.sort_by(|a, b| b.1.cmp(a.1)); | ||
| let values = &counts[..self.lines.min(counts.len())]; | ||
| let label_width = values.iter().fold(1, |acc, x| acc.max(x.0.len())); | ||
| let divisor = 1.max(counts[0].1 / width); | ||
| let width_count = format!("{}", counts[0].1).len(); | ||
| writeln!( | ||
| f, | ||
| "Each {} represents a count of {}", | ||
| Red.paint("∎"), | ||
| Blue.paint(divisor.to_string()), | ||
| )?; | ||
| for (term, count) in values.iter() { | ||
| writeln!( | ||
| f, | ||
| "[{label}] [{count}] {bar}", | ||
| label = Blue.paint(format!("{:>width$}", term, width = label_width)), | ||
| count = Green.paint(format!("{:width$}", count, width = width_count)), | ||
| bar = Red.paint(format!("{:∎<width$}", "", width = *count / divisor)) | ||
| )?; | ||
| } | ||
| Ok(()) | ||
| } | ||
| } | ||
|
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| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
| use yansi::Paint; | ||
|
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| #[test] | ||
| fn test_common_terms_empty() { | ||
| let terms = CommonTerms::new(10); | ||
| Paint::disable(); | ||
| let display = format!("{}", terms); | ||
| assert_eq!(display, "No data\n"); | ||
| } | ||
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| #[test] | ||
| fn test_common_terms() { | ||
| let mut terms = CommonTerms::new(2); | ||
| for _ in 0..100 { | ||
| terms.observe(String::from("foo")); | ||
| } | ||
| for _ in 0..10 { | ||
| terms.observe(String::from("arrrrrrrr")); | ||
| } | ||
| for _ in 0..20 { | ||
| terms.observe(String::from("barbar")); | ||
| } | ||
| Paint::disable(); | ||
| let display = format!("{:10}", terms); | ||
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| println!("{}", display); | ||
| assert!(display.contains("[ foo] [100] ∎∎∎∎∎∎∎∎∎∎\n")); | ||
| assert!(display.contains("[barbar] [ 20] ∎∎\n")); | ||
| assert!(!display.contains("arr")); | ||
| } | ||
| } |
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