Finds a similar-ish wad txt file

Cargo.toml

@@ -13,4 +13,5 @@ native-dialog = "0.6.3"
 rfd = "0.11.4"
 serde = "1.0.163"
 serde_derive = "1.0.163"
+strsim = "0.10.0"
 toml = "0.7.4"

src/wad.rs

@@ -2,8 +2,10 @@ use bincode;
 use serde::Deserialize;
 use std::collections::HashMap;
 use std::fs::File;
+use std::fs;
 use std::io::{BufReader, Seek, SeekFrom};
 use std::path::PathBuf;
+use strsim;
 
 /*
 A great document I've used as a reference is The Unofficial Doom Specs v1.666
@@ -57,11 +59,26 @@ pub struct OpenWad {
 }
 
 pub fn find_txt_file(path: &PathBuf) -> Option<PathBuf> {
-    // get folder WAD is in
-    // get name of WAD
-    // iterate through all txt/TXT files
-    //   if name is like 50% the same/similar, return match
-    // return if found anything, otherwise None
+    if !path.exists() || !path.is_file() {
+        return None
+    }
+    if let (Some(f), Some(p)) = (path.file_name(), path.parent()) {
+        let files_in_folder = fs::read_dir(&p).unwrap();
+        let mut txt_file = PathBuf::from(f);
+        txt_file.set_extension(".txt");
+        let txt_file = txt_file.into_os_string().into_string().unwrap().to_lowercase();
+        for f in files_in_folder {
+            // Jesus this can't be the right way to do things
+            let f1 = f.unwrap().path().file_name().unwrap().to_os_string().into_string().unwrap();
+            let f2 = f1.clone().to_lowercase();
+            let result = strsim::normalized_levenshtein(&txt_file, &f2);
+            if result > 0.5 {
+                let mut f3 = PathBuf::from(p);
+                f3.push(f1);
+                return Some(f3);
+            }
+        }
+    }
     None
 }
 
@@ -276,7 +293,7 @@ mod tests {
 
     #[test]
     fn test_open_wad() {
-        let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        let freedoom_iwad = PathBuf::from("test_files/freedoom1.wad");
         assert!(
             freedoom_iwad.exists(),
             "WAD test need freedoom1.wad - get it from here https://freedoom.github.io"
@@ -288,7 +305,7 @@ mod tests {
 
     #[test]
     fn test_num_levels_correct() {
-        let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        let freedoom_iwad = PathBuf::from("test_files/freedoom1.wad");
         let ow = open_wad(&freedoom_iwad);
         let summary = get_enemies_and_health_per_level(ow);
         assert_eq!(summary.len(), 9 * 4);
@@ -296,7 +313,7 @@ mod tests {
 
     #[test]
     fn test_enemies_correct() {
-        let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        let freedoom_iwad = PathBuf::from("test_files/freedoom1.wad");
         let ow = open_wad(&freedoom_iwad);
         let summary = get_enemies_and_health_per_level(ow);
         let (c1m1e, _) = summary.get("E1M1\0\0\0\0").unwrap();
@@ -305,7 +322,7 @@ mod tests {
 
     #[test]
     fn test_health_correct() {
-        let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        let freedoom_iwad = PathBuf::from("test_files/freedoom1.wad");
         let ow = open_wad(&freedoom_iwad);
         let summary = get_enemies_and_health_per_level(ow);
         let (_, c1m1h) = summary.get("E1M1\0\0\0\0").unwrap();
@@ -318,7 +335,7 @@ mod tests {
     #[test]
     #[ignore]
     fn test_guess_at_difficulty() {
-        let freedoom_iwad = PathBuf::from("freedoom1.wad");
+        let freedoom_iwad = PathBuf::from("test_files/freedoom1.wad");
         let ow = open_wad(&freedoom_iwad);
         let summary = get_enemies_and_health_per_level(ow);
         let mut levels = Vec::new();
@@ -338,6 +355,13 @@ mod tests {
         panic!();
     }
 
+    #[test]
+    fn test_txt_file_finding() {
+        let wad_path = PathBuf::from("test_files/10amBreakM.wad");
+        let txt_file = find_txt_file(&wad_path);
+        assert_eq!(txt_file, Some(PathBuf::from("test_files/10amBreakM.txt")));
+    }
+
     #[test]
     fn test_struct_size() {
         // This probably isn't really neccesary... but it might catch a mistake, maybe?