finish up the storage backend

src/data.rs

@@ -89,6 +89,12 @@ impl FileMeta {
     }
 }
 
+impl std::fmt::Display for FileMeta {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "file_name: {}\n", self.file_name)
+    }
+}
+
 struct UserData {
     pub username: String,
     pub pw_hash: String,
@@ -173,7 +179,14 @@ impl DataStorage {
     }
 
     pub fn create_file(&mut self, id: String, file_meta: FileMeta) -> Result<(), Error> {
-        todo!()
+        if self.files.contains_key(&id) {
+            return Err(Error::IDCollision);
+        }
+
+        self.files.insert(id, file_meta);
+
+        self.write_file_meta(id);
+        Ok(())
     }
 
     pub fn delete_file(&mut self, id: String) -> Result<(), Error> {
@@ -186,7 +199,13 @@ impl DataStorage {
     }
 
     pub fn create_redirect(&mut self, id: String, target: String) -> Result<(), Error> {
-        todo!()
+        if self.redirects.contains_key(&id) {
+            return Err(Error::IDCollision);
+        }
+        self.redirects.insert(id, target);
+
+        self.write_redirects()?;
+        Ok(())
     }
 
     pub fn edit_redirect(&mut self, id: String, new_target: String) -> Result<(), Error> {
@@ -319,4 +338,15 @@ impl DataStorage {
 
         Ok(())
     }
+
+    fn write_file_meta(&self, id: String) -> Result<(), Error> {
+        let file_meta = *self.files.get(&id).ok_or(Error::ShitMissing(id))?;
+
+        std::fs::write(
+            self.base_dir.join(*FILE_DIR).join(id),
+            file_meta.to_string(),
+        )?;
+
+        Ok(())
+    }
 }