Implement a function to read the name from the affiliated keywords.

org_mode_samples/affiliated_keyword/case_insensitive.org

@@ -0,0 +1,8 @@
+#+NAME: foo
+bar
+
+#+NaMe: baz
+cat
+
+#+name: lorem
+ipsum

src/parser/util.rs

@@ -22,6 +22,7 @@ use crate::error::CustomError;
 use crate::error::MyError;
 use crate::error::Res;
 use crate::types::IndentationLevel;
+use crate::types::Keyword;
 
 pub(crate) const WORD_CONSTITUENT_CHARACTERS: &str =
     "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
@@ -275,3 +276,14 @@ pub(crate) fn indentation_level<'b, 'g, 'r, 's>(
         .sum();
     Ok((remaining, (indentation_level, leading_whitespace)))
 }
+
+pub(crate) fn get_name<'s>(affiliated_keywords: &Vec<Keyword<'s>>) -> Option<&'s str> {
+    let name_keyword = affiliated_keywords
+        .iter()
+        .filter(|kw| match kw.name {
+            Some(name) if name.eq_ignore_ascii_case("name") => true,
+            _ => false,
+        })
+        .last();
+    name_keyword.map(|kw| kw.value)
+}