term_keep 1.2.1

Terminal-based Google Keep clone. Can be used as a note taking / To-Do list app on a server.
Documentation 
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use colored::Colorize;
use unicode_segmentation::UnicodeSegmentation;

#[must_use]
pub fn truncate_string_ellipsis(s: &str, length: usize) -> String {
  let graphemes = s.graphemes(true);

  if graphemes.clone().count() <= length {
    s.to_owned()
  } else {
    format!("{}...", graphemes.take(length).collect::<String>())
  }
}

#[must_use]
pub fn count_lines(s: &str) -> usize {
  s.split('\n')
    .map(str::trim)
    .filter(|line| !line.is_empty())
    .count()
}

#[must_use]
pub const fn bool_to_str<'a>(b: bool) -> &'a str {
  if b {
    "Yes"
  } else {
    "No"
  }
}

#[must_use]
pub fn first_line(s: &str) -> &str {
  s.split('\n')
    .filter(|line| !line.trim().is_empty())
    .collect::<Vec<&str>>()
    .first()
    .unwrap_or(&"")
}

#[must_use]
pub fn highlight(s: &str) -> String {
  format!("{}", s.bold().truecolor(0, 0, 0).on_truecolor(233, 173, 12))
}

#[cfg(test)]
mod tests {
  use super::*;

  #[test]
  fn test_count_lines() {
    assert_eq!(count_lines(""), 0);
    assert_eq!(count_lines("a"), 1);
    assert_eq!(count_lines(" a \n b "), 2);
    assert_eq!(count_lines(" a \n b \n "), 2);
    assert_eq!(count_lines(" a \n  \n b"), 2);
    assert_eq!(count_lines(" a \n  \n b \n"), 2);
    assert_eq!(count_lines(" a \n b \n c \n"), 3);
    assert_eq!(count_lines(" a \n b \n c \n d"), 4);
    assert_eq!(count_lines(" \n\n\n\nx\n\n\n"), 1);
  }

  #[test]
  fn test_first_line() {
    assert_eq!(first_line("hello\nworld"), "hello");
    assert_eq!(first_line("  a \n b"), "  a ");
    assert_eq!(first_line(" only one line "), " only one line ");
    assert_eq!(
      first_line("  \n first line is blank "),
      " first line is blank "
    );
    assert_eq!(
      first_line("\n first line is blank "),
      " first line is blank "
    );
    assert_eq!(first_line("\n \n   "), "");
  }

  #[test]
  fn test_truncate_string_ellipsis() {
    assert_eq!(truncate_string_ellipsis("abcde", 2), "ab...");
    assert_eq!(truncate_string_ellipsis("abcde", 7), "abcde");
    assert_eq!(truncate_string_ellipsis("東京都港区", 2), "東京...");
    assert_eq!(truncate_string_ellipsis("東京都港区", 5), "東京都港区");
    assert_eq!(truncate_string_ellipsis("東京都港区", 15), "東京都港区");
  }

  #[test]
  fn test_truncate_string_ellipsis_hindi() {
    assert_eq!(truncate_string_ellipsis("न", 1), "न");
    assert_eq!(truncate_string_ellipsis("नम", 2), "नम");
    assert_eq!(truncate_string_ellipsis("नमस्", 2), "नम...");
    assert_eq!(truncate_string_ellipsis("नमस्", 3), "नमस्");
    assert_eq!(truncate_string_ellipsis("नमस्ते", 2), "नम...");
    assert_eq!(truncate_string_ellipsis("नमस्ते", 3), "नमस्...");
    assert_eq!(truncate_string_ellipsis("नमस्ते", 4), "नमस्ते");
    assert_eq!(truncate_string_ellipsis("नमस्ते", 5), "नमस्ते");
  }

  #[test]
  fn test_bool_to_str() {
    assert_eq!(bool_to_str(true), "Yes");
    assert_eq!(bool_to_str(false), "No");
  }
}