Created simple backend with hard-coded prices

project/src/backend.rs

@@ -0,0 +1,50 @@
+// Libraries
+use std::io::Result;
+
+// Structures
+pub struct Backend {
+    memberships: Vec<String>,
+}
+
+// Implementations
+impl Backend {
+    // Constructors
+    /// Creates a new Backend
+    ///
+    /// # Arguments
+    /// * `fetch` - Uses the **Internet** to fetch the latest prices for memberships.
+    ///
+    /// # Examples
+    /// ```rs
+    /// let backend = Backend::new(true)?;
+    /// ```
+    pub fn new(fetch: bool) -> Result<Self> {
+        // Did we want to fetch our prices?
+        let memberships: Vec<String> = if fetch {
+            // Use Internet to get prices
+            unimplemented!("TODO: Implement online Membership Price Fetching");
+        } else {
+            // Manually creating our prices
+            vec![
+                "Super ($41.99)".to_string(),
+                "Deluxe ($36.99)".to_string(),
+                "Standard ($31.99)".to_string(),
+                "Basic ($26.99)".to_string(),
+            ]
+        };
+
+        // Return Self
+        Ok(Self { memberships })
+    }
+
+    // Functions
+    /// Gets the list of current memberships
+    ///
+    /// # Examples
+    /// ```rs
+    /// app.set_membership_names(backend.get_memberships());
+    /// ```
+    pub fn get_memberships(&self) -> Vec<String> {
+        self.memberships.clone()
+    }
+}