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use crate::lint::rule::Rule;
use crate::markdown::MarkdownParser;
use crate::types::Violation;
use serde_json::Value;
pub struct MD050;
impl Rule for MD050 {
fn name(&self) -> &str {
"MD050"
}
fn description(&self) -> &str {
"Strong style should be consistent"
}
fn tags(&self) -> &[&str] {
&["emphasis"]
}
fn check(&self, parser: &MarkdownParser, config: Option<&Value>) -> Vec<Violation> {
let style = config
.and_then(|c| c.get("style"))
.and_then(|v| v.as_str())
.unwrap_or("consistent");
let mut violations = Vec::new();
let mut first_style: Option<&str> = None;
for (line_num, line) in parser.lines().iter().enumerate() {
let line_number = line_num + 1;
// Look for strong patterns: **text** or __text__
let chars: Vec<char> = line.chars().collect();
let mut i = 0;
while i + 1 < chars.len() {
// Check for ** or __
if i + 1 < chars.len() {
let two_char = format!("{}{}", chars[i], chars[i + 1]);
if two_char == "**" || two_char == "__" {
// Find closing marker
let mut found_close = false;
for j in (i + 2)..chars.len().saturating_sub(1) {
if j + 1 < chars.len() {
let close_two = format!("{}{}", chars[j], chars[j + 1]);
if close_two == two_char {
found_close = true;
// Track style
let current_style = if two_char == "**" {
"asterisk"
} else {
"underscore"
};
if style == "consistent" {
if let Some(first) = first_style {
if current_style != first {
// Report violation for both opening and closing markers
violations.push(Violation {
line: line_number,
column: Some(i + 1),
rule: self.name().to_string(),
message: format!(
"Strong style should be consistent: expected '{}', found '{}'",
if first == "asterisk" { "**" } else { "__" },
two_char
),
fix: None,
});
violations.push(Violation {
line: line_number,
column: Some(j + 1),
rule: self.name().to_string(),
message: format!(
"Strong style should be consistent: expected '{}', found '{}'",
if first == "asterisk" { "**" } else { "__" },
close_two
),
fix: None,
});
}
} else {
first_style = Some(current_style);
}
} else {
let expected_marker =
if style == "asterisk" { "**" } else { "__" };
if two_char != expected_marker {
// Report violation for both opening and closing markers
violations.push(Violation {
line: line_number,
column: Some(i + 1),
rule: self.name().to_string(),
message: format!(
"Strong style should be '{}', found '{}'",
expected_marker, two_char
),
fix: None,
});
violations.push(Violation {
line: line_number,
column: Some(j + 1),
rule: self.name().to_string(),
message: format!(
"Strong style should be '{}', found '{}'",
expected_marker, close_two
),
fix: None,
});
}
}
i = j + 1; // Skip to after closing
break;
}
}
}
if found_close {
i += 1;
continue;
}
}
}
i += 1;
}
}
violations
}
fn fixable(&self) -> bool {
false
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_consistent_asterisk() {
let content = "This is **bold** and **more bold**.";
let parser = MarkdownParser::new(content);
let rule = MD050;
let violations = rule.check(&parser, None);
assert_eq!(violations.len(), 0);
}
#[test]
fn test_consistent_underscore() {
let content = "This is __bold__ and __more bold__.";
let parser = MarkdownParser::new(content);
let rule = MD050;
let violations = rule.check(&parser, None);
assert_eq!(violations.len(), 0);
}
#[test]
fn test_inconsistent() {
let content = "This is **bold** and __also bold__.";
let parser = MarkdownParser::new(content);
let rule = MD050;
let violations = rule.check(&parser, None);
// Reports violation for both opening and closing markers of the second strong emphasis
assert_eq!(violations.len(), 2);
}
#[test]
fn test_enforced_style() {
let content = "This is __bold__ text.";
let parser = MarkdownParser::new(content);
let rule = MD050;
let config = serde_json::json!({ "style": "asterisk" });
let violations = rule.check(&parser, Some(&config));
// Reports violation for both opening and closing markers
assert_eq!(violations.len(), 2);
}
}