cacao/examples/todos_list/storage/defaults.rs
Benedikt Terhechte e6696eaa3e
Multiple changes I had to make for Ebou (#89)
* Add segmented control, icons, toolbar

* add to demos

* doc tests

* format code

* Additional SFSymbol definitions
2023-07-31 23:51:53 -07:00

80 lines
2.7 KiB
Rust

use std::collections::HashMap;
use cacao::defaults::{UserDefaults, Value};
use objc::runtime::Object;
const EXAMPLE: &str = "exampleSetting";
/// A very basic wrapper around UserDefaults. If I wind up implementing Serde support for
/// UserDefaults, then much of this could be removed or simplified - but I'm not sold on that yet,
/// so this exists for now.
#[derive(Debug)]
pub struct Defaults;
impl Defaults {
/// Registers the default settings for our application. Note that just because this is run at
/// application start does _not_ mean it's always the defaults; this is effectively "on first
/// run, set these defaults". Updates will persist and overwrite these accordingly.
pub fn register() {
let mut defaults = UserDefaults::standard();
defaults.register({
let mut map = HashMap::new();
map.insert(EXAMPLE, Value::Bool(true));
map
});
}
/// Toggles the example setting.
pub fn toggle_should_whatever(_object: *const Object) {
toggle_bool(EXAMPLE);
}
/// Returns whether the example setting is currently true or false.
pub fn should_whatever() -> bool {
load_bool(EXAMPLE)
}
}
/// A helper method for toggling a boolean value held at the specified key. If the value cannot
/// be pulled as a bool, then this panics.
///
/// Note that choosing to panic here is a personal design decision; this is core functionality that
/// should work, and I'd rather it crash with a meaningful message rather than `unwrap()` issues.
fn toggle_bool(key: &str) {
let mut defaults = UserDefaults::standard();
if let Some(value) = defaults.get(key) {
if let Some(value) = value.as_bool() {
defaults.insert(key, Value::Bool(!value));
return;
}
panic!("Attempting to toggle a boolean value for {}, but it's not a boolean.", key);
}
panic!(
"Attempting to toggle a boolean value for {}, but this key does not exist.",
key
);
}
/// A helper method for loading a boolean value held at the specified key. If the value cannot
/// be pulled as a bool, then this panics.
///
/// Note that choosing to panic here is a personal design decision; this is core functionality that
/// should work, and I'd rather it crash with a meaningful message rather than `unwrap()` issues.
fn load_bool(key: &str) -> bool {
let defaults = UserDefaults::standard();
if let Some(value) = defaults.get(key) {
if let Some(value) = value.as_bool() {
return value;
}
panic!("Attempting to load a boolean value for {}, but it's not a boolean.", key);
}
panic!("Attempting to load a boolean value for {}, but this key does not exist.", key);
}