Enable dynamic access to the file access interface.

src/context/file_access_interface.rs

@@ -1,13 +1,15 @@
+use std::fmt::Debug;
 use std::path::Path;
 
-pub trait FileAccessInterface {
-    fn read_file<P: AsRef<Path>>(&self, path: P) -> Result<String, Box<dyn std::error::Error>>;
+pub trait FileAccessInterface: Debug {
+    fn read_file(&self, path: &dyn AsRef<Path>) -> Result<String, Box<dyn std::error::Error>>;
 }
 
+#[derive(Debug, Clone)]
 pub struct LocalFileAccessInterface;
 
 impl FileAccessInterface for LocalFileAccessInterface {
-    fn read_file<P: AsRef<Path>>(&self, path: P) -> Result<String, Box<dyn std::error::Error>> {
+    fn read_file(&self, path: &dyn AsRef<Path>) -> Result<String, Box<dyn std::error::Error>> {
         Ok(std::fs::read_to_string(path)?)
     }
 }

src/context/global_settings.rs

@@ -1,27 +1,26 @@
-// use super::FileAccessInterface;
-// use super::LocalFileAccessInterface;
+use super::FileAccessInterface;
+use super::LocalFileAccessInterface;
 use crate::types::Object;
 
 // TODO: Ultimately, I think we'll need most of this: https://orgmode.org/manual/In_002dbuffer-Settings.html
 
 #[derive(Debug, Clone)]
-// , F: FileAccessInterface
 pub struct GlobalSettings<'g, 's> {
     pub radio_targets: Vec<&'g Vec<Object<'s>>>,
-    // pub file_access: F,
+    pub file_access: &'g dyn FileAccessInterface,
 }
 
 impl<'g, 's> GlobalSettings<'g, 's> {
-    pub fn new() -> Self {
+    pub fn new() -> GlobalSettings<'g, 's> {
         GlobalSettings {
             radio_targets: Vec::new(),
-            // file_access: LocalFileAccessInterface,
+            file_access: &LocalFileAccessInterface,
         }
     }
 }
 
 impl<'g, 's> Default for GlobalSettings<'g, 's> {
-    fn default() -> Self {
+    fn default() -> GlobalSettings<'g, 's> {
         GlobalSettings::new()
     }
 }