add regex support

src/texts/bible.rs

@@ -1,4 +1,5 @@
 use inline_colorization::*;
+use regex::Regex;
 use std::fmt::Display;
 
 use serde::Deserialize;
@@ -74,11 +75,24 @@ pub const BOOKS_IN_ORDER: [&str; 66] = [
 
 pub fn search_for_word(word: &str, from_files: &Bible) -> Vec<String> {
     let mut found = Vec::new();
+    let regex = match Regex::new(&word.to_lowercase()) {
+        Ok(re) => re,
+        Err(err) => {
+            eprintln!("{}", err);
+
+            #[cfg(debug_assertions)]
+            todo!("IDK what to do yet if building regex engine fails");
+
+            #[cfg(not(debug_assertions))]
+            return Vec::new()
+        },
+    };
+
     for test in &from_files.testaments {
         for book in &test.books {
             for chapter in &book.chapters {
                 for verse in &chapter.verses {
-                    if verse.text.to_lowercase().contains(&word.to_lowercase()) {
+                    if regex.is_match(&verse.text.to_lowercase()) {
                         found.push(format!("{} {}:{}", BOOKS_IN_ORDER[book.number-1], chapter.number, verse.number));
                     }
                 }