Add db output for testing

src/database/mod.rs

@@ -2,6 +2,7 @@ use log::warn;
 use serde_json;
 use std::error::Error;
 use std::fs;
+use std::fmt;
 use std::path;
 
 extern crate custom_error;
@@ -31,6 +32,36 @@ pub struct Database {
     contents: Vec<Category>,
 }
 
+impl fmt::Display for Group {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "  ({})", self.name)?;
+        for file in self.files.iter() {
+            writeln!(f, r#"    File "{}": {}"#, file.name, file.contents.to_string())?;
+        }
+        Ok(())
+    }
+}
+
+impl fmt::Display for Category {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "[{}]", self.name)?;
+        for g in self.groups.iter() {
+            write!(f, "{}", g)?;
+        }
+        Ok(())
+    }
+}
+
+impl fmt::Display for Database {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "DB: {}", self.storage.display())?;
+        for c in self.contents.iter() {
+            writeln!(f, "{}", c)?;
+        }
+        Ok(())
+    }
+}
+
 impl Database {
     pub fn new(storage: &path::Path) -> Result<Database, Box<dyn Error>> {
         if !storage.is_dir() {

src/main.rs

@@ -7,7 +7,7 @@ fn main() {
     let filename = &args[1];
     let config = database::Database::new(Path::new(filename));
     match config {
-        Ok(db) => print!("ok"),
-        _ => (),
+        Ok(db) => print!("{}", db),
+        Err(error) => println!("OH NO: {}", error),
     }
 }