tsk-76: Adding function to simplify getting path of Song

src/constants.rs

@@ -12,3 +12,9 @@ pub mod file_extensions {
         pub const PNGEXTENSION: &str = ".png";
     }
 }
+
+pub mod error {
+    pub const DIRECTORY_NOT_INITIALIZED: &str = "Directory has not been initialized";
+    pub const FILENAME_NOT_INITIALIZED: &str = "Filename has not bee initialized";
+    pub const LAST_CHARACTER_IN_DIRECTORY: &str = "Could not access last character of directory";
+}

src/song.rs

@@ -71,14 +71,15 @@ impl Song {
 
     pub fn song_path(&self) -> Result<String, std::io::Error> {
         if self.directory.is_empty() {
-            return Err(std::io::Error::other("Directory has not been initialized"));
+            return Err(std::io::Error::other(crate::constants::error::DIRECTORY_NOT_INITIALIZED));
         } else if self.filename.is_empty() {
-            return Err(std::io::Error::other("Filename has not bee initialized"));
+            return Err(std::io::Error::other(crate::constants::error::FILENAME_NOT_INITIALIZED));
         }
 
         let directory = &self.directory;
         let last_index = directory.len() - 1;
 
+        /*
         if let Some(character) = directory.chars().nth(last_index) {
             let buffer: String = if character != '/' {
                 directory.clone() + "/"
@@ -92,6 +93,11 @@ impl Song {
                 "Could not access last character of directory",
             ))
         }
+        */
+        match crate::util::concatenate_path(&directory, &self.filename, last_index) {
+            Ok(path) => Ok(path),
+            Err(err) => Err(err)
+        }
     }
 
     /// Saves the song to the filesystem using the song's data

src/util/mod.rs

@@ -0,0 +1,13 @@
+pub fn concatenate_path(directory: &str, filename: &str, last_index: usize) -> Result<String, std::io::Error> {
+    if let Some(character) = directory.chars().nth(last_index) {
+        let buffer: String = if character != '/' {
+            format!("{directory}/")
+        } else {
+            String::from(directory)
+        };
+
+        Ok(format!("{buffer}{filename}"))
+    } else {
+        Err(std::io::Error::other(crate::constants::error::LAST_CHARACTER_IN_DIRECTORY))
+    }
+}