Multiple enhancements and bugfixes

!Breaking change! - The updated version will not be able to read your old database file

Major improvements:
- Added editable pastas
- Added private pastas
- Added line numbers
- Added support for wide mode (1080p instead of 720p)
- Added syntax highlighting support
- Added read-only mode
- Added built-in help page
- Added option to remove logo, change title and footer text

Minor improvements:
- Improved looks in pure html mode
- Removed link to GitHub repo from navbar
- Broke up 7km long main.rs file into smaller modules
- Moved water.css into a template instead of serving it as an external resource
- Made Save button a bit bigger
- Updated README.MD

Bugfixes:
- Fixed a bug where an incorrect animal ID in a request would cause a crash
- Fixed a bug where an empty or corrupt JSON database would cause a crash

src/util/dbio.rs

@@ -0,0 +1,56 @@
+use std::fs::File;
+use std::io;
+use std::io::{BufReader, BufWriter};
+
+use crate::Pasta;
+
+static DATABASE_PATH: &'static str = "pasta_data/database.json";
+
+pub fn save_to_file(pasta_data: &Vec<Pasta>) {
+    let mut file = File::create(DATABASE_PATH);
+    match file {
+        Ok(_) => {
+            let writer = BufWriter::new(file.unwrap());
+            serde_json::to_writer(writer, &pasta_data).expect("Failed to create JSON writer");
+        }
+        Err(_) => {
+            log::info!("Database file {} not found!", DATABASE_PATH);
+            file = File::create(DATABASE_PATH);
+            match file {
+                Ok(_) => {
+                    log::info!("Database file {} created.", DATABASE_PATH);
+                    save_to_file(pasta_data);
+                }
+                Err(err) => {
+                    log::error!(
+                        "Failed to create database file {}: {}!",
+                        &DATABASE_PATH,
+                        &err
+                    );
+                    panic!("Failed to create database file {}: {}!", DATABASE_PATH, err)
+                }
+            }
+        }
+    }
+}
+
+pub fn load_from_file() -> io::Result<Vec<Pasta>> {
+    let file = File::open(DATABASE_PATH);
+    match file {
+        Ok(_) => {
+            let reader = BufReader::new(file.unwrap());
+            let data: Vec<Pasta> = match serde_json::from_reader(reader) {
+                Ok(t) => t,
+                _ => Vec::new(),
+            };
+            Ok(data)
+        }
+        Err(_) => {
+            log::info!("Database file {} not found!", DATABASE_PATH);
+            save_to_file(&Vec::<Pasta>::new());
+
+            log::info!("Database file {} created.", DATABASE_PATH);
+            load_from_file()
+        }
+    }
+}