add the contains attribute and the nth child

src/lib.rs

@@ -1,6 +1,7 @@
 use regex::Regex;
 
 fn cssifier(xpath: &'static str) -> Option<String> {
+    // Ultra magic regex to parse XPath selectors
     let reg = Regex::new(r#"(?P<node>(^id\(["']?(?P<idvalue>\s*[\w/:][-/\w\s,:;.]*)["']?\)|(?P<nav>//?)(?P<tag>([a-zA-Z][a-zA-Z0-9]{0,10}|\*))(\[((?P<matched>(?P<mattr>@?[.a-zA-Z_:][-\w:.]*(\(\))?)=["'](?P<mvalue>\s*[\w/:][-/\w\s,:;.]*))["']|(?P<contained>contains\((?P<cattr>@?[.a-zA-Z_:][-\w:.]*(\(\))?),\s*["'](?P<cvalue>\s*[\w/:][-/\w\s,:;.]*)["']\)))\])?(\[(?P<nth>\d)\])?))"#).unwrap();
     let mut css = String::new();
     let mut position = 0;
@@ -9,6 +10,7 @@ fn cssifier(xpath: &'static str) -> Option<String> {
         let node = reg.captures(&xpath[position..])?;
         let find = reg.find(&xpath[position..])?;
 
+        // See the nav identifier
         let nav = match position {
             0 => "",
             _ => {
@@ -20,6 +22,7 @@ fn cssifier(xpath: &'static str) -> Option<String> {
             }
         };
 
+        // See the tag name
         let tag = if node.name("tag")?.as_str() == "*" {
             ""
         } else {
@@ -29,6 +32,7 @@ fn cssifier(xpath: &'static str) -> Option<String> {
             }
         };
 
+        // See the idenfitier attribute of the tag
         let attr = if node.name("idvalue").is_some() {
             format!("#{}", node.name("idvalue")?.as_str().replace(" ", "#"))
         } else if node.name("matched").is_some() {
@@ -41,13 +45,40 @@ fn cssifier(xpath: &'static str) -> Option<String> {
                 format!(".{}", mvalue.replace(" ", "."))
             } else if mattr == "text()" || mattr == "." {
                 format!(":contains(^{}$)", mvalue)
+            } else if mattr != "" {
+                let new_mvalue = if mvalue.find(" ").is_some() {
+                    format!("\"{}\"", mvalue)
+                } else {
+                    mvalue.to_string()
+                };
+                format!("[{}={}]", mattr.replace("@", ""), new_mvalue)
+            } else {
+                String::from("")
+            }
+        } else if node.name("contained").is_some() {
+            let cattr = node.name("cattr")?.as_str();
+            let cvalue = node.name("cvalue")?.as_str();
+
+            if cattr.starts_with("@") {
+                format!("{}*={}", cattr.replace("@", ""), cvalue)
+            } else if cattr == "text()" {
+                format!(":contains({})", cvalue)
             } else {
                 String::from("")
             }
         } else {
             String::from("")
         };
-        css = format!("{}{}{}{}", css, nav, tag, attr);
+
+        // See the child type
+        let nth = if node.name("nth").is_some() {
+            format!(":nth-of-type({})", node.name("nth")?.as_str())
+        } else {
+            String::from("")
+        };
+
+        // Paste all the magic :sparkles:
+        css = format!("{}{}{}{}{}", css, nav, tag, attr, nth);
         position += find.end();
     }
 
@@ -56,11 +87,15 @@ fn cssifier(xpath: &'static str) -> Option<String> {
 
 #[cfg(test)]
 mod tests {
-    use crate::cssifier;
+    use super::cssifier;
 
     #[test]
     fn it_works() {
         assert_eq!(cssifier("//a/b").unwrap(), "a b");
         assert_eq!(cssifier("//a/b[@id='hello']").unwrap(), "a b#hello");
+        assert_eq!(
+            cssifier("//a/b[contains(text(), 'hello')]").unwrap(),
+            "a b:contains(hello)"
+        );
     }
 }