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Switch from channel-based communication to async calls into the core

This commit is contained in:
Savanni D'Gerinel 2023-12-28 19:09:12 -05:00
parent 5cd0e822c6
commit ac343a2af6
4 changed files with 121 additions and 104 deletions
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125
fitnesstrax/app/src/app.rs
View File

@ -14,80 +14,113 @@ General Public License for more details.
You should have received a copy of the GNU General Public License along with FitnessTrax. If not, see <https://www.gnu.org/licenses/>.
*/
use emseries::Series;
use chrono::NaiveDate;
use emseries::{time_range, Record, RecordId, Series, Timestamp};
use ft_core::TraxRecord;
use std::{
path::{Path, PathBuf},
sync::{Arc, RwLock},
};
use tokio::runtime::Runtime;
/// Invocations are how parts of the application, primarily the UI, will send requests to the core.
#[derive(Debug)]
pub enum AppInvocation {
/// Tell the core to try to open a database.
OpenDatabase(PathBuf),
/// Request a set of records from the core.
// Note: this will require a time range, but doesn't yet.
RequestRecords,
}
/// Responses are messages that the core sends to the UI. Though they are called responses, the
/// could actually be pre-emptively sent, such as notifications. The UI will need to be able to
/// process those any time they arrive.
///
/// A typical use would be for the UI to send an [AppInvocation::RequestRecords] request and
/// receive [AppResponse::Records].
#[derive(Debug)]
pub enum AppResponse {
/// No database is available. The UI should typically display a placeholder, such as the
/// welcome view.
pub enum AppError {
NoDatabase,
/// The database is open and here is a set of records. Typically, the set of records will be
/// all of the records within a time frame, but this can actually be any set of records.
Records,
/// The database has been changed. This message is useful for telling the UI that a significant
/// change has happened. Further, the UI needs to save PathBuf to settings, because the
/// gio::Settings system can't be run in the fully async background.
DatabaseChanged(PathBuf),
FailedToOpenDatabase,
Unhandled,
}
/// The real, headless application. This is where all of the logic will reside.
#[derive(Clone)]
pub struct App {
runtime: Arc<Runtime>,
database: Arc<RwLock<Option<Series<TraxRecord>>>>,
}
impl App {
pub fn new(db_path: Option<PathBuf>) -> Self {
let database = db_path.map(|path| Series::open(path).unwrap());
let runtime = Arc::new(
tokio::runtime::Builder::new_multi_thread()
.enable_all()
.build()
.unwrap(),
);
let s = Self {
runtime,
database: Arc::new(RwLock::new(database)),
};
s
}
pub async fn process_invocation(&self, invocation: AppInvocation) -> AppResponse {
match invocation {
AppInvocation::OpenDatabase(db_path) => {
self.open_db(&db_path);
AppResponse::DatabaseChanged(db_path)
}
AppInvocation::RequestRecords => {
if self.database.read().unwrap().is_none() {
AppResponse::NoDatabase
pub async fn records(
&self,
start: NaiveDate,
end: NaiveDate,
) -> Result<Vec<Record<TraxRecord>>, AppError> {
let db = self.database.clone();
self.runtime
.spawn_blocking(move || {
if let Some(ref db) = *db.read().unwrap() {
let records = db
.search(time_range(
Timestamp::Date(start),
true,
Timestamp::Date(end),
true,
))
.map(|record| record.clone())
.collect::<Vec<Record<TraxRecord>>>();
Ok(records)
} else {
AppResponse::Records
Err(AppError::NoDatabase)
}
}
}
})
.await
.unwrap()
}
fn open_db(&self, path: &Path) {
let db = Series::open(path).unwrap();
*self.database.write().unwrap() = Some(db);
pub async fn put_record(&self, record: TraxRecord) -> Result<RecordId, AppError> {
let db = self.database.clone();
self.runtime
.spawn_blocking(move || {
if let Some(ref mut db) = *db.write().unwrap() {
let id = db.put(record).unwrap();
Ok(id)
} else {
Err(AppError::NoDatabase)
}
})
.await
.unwrap()
.map_err(|_| AppError::Unhandled)
}
pub async fn save_record(&self, record: Record<TraxRecord>) -> Result<(), AppError> {
let db = self.database.clone();
self.runtime
.spawn_blocking(move || {
if let Some(ref mut db) = *db.write().unwrap() {
db.update(record).map_err(|_| AppError::Unhandled)
} else {
Err(AppError::NoDatabase)
}
})
.await
.unwrap()
.map_err(|_| AppError::Unhandled)
}
pub async fn open_db(&self, path: PathBuf) -> Result<(), AppError> {
let db_ref = self.database.clone();
self.runtime
.spawn_blocking(move || {
let db = Series::open(path).map_err(|_| AppError::FailedToOpenDatabase)?;
*db_ref.write().unwrap() = Some(db);
Ok(())
})
.await
.unwrap()
}
}

52
fitnesstrax/app/src/app_window.rs
View File

@ -15,25 +15,20 @@ You should have received a copy of the GNU General Public License along with Fit
*/
use crate::{
app::{AppInvocation, AppResponse},
app::App,
views::{HistoricalView, PlaceholderView, View, ViewName, WelcomeView},
};
use adw::prelude::*;
use async_channel::Sender;
use chrono::{NaiveDate, TimeZone};
use chrono_tz::America::Anchorage;
use dimensioned::si::{KG, M, S};
use ft_core::{Steps, TimeDistance, TraxRecord, Weight};
use chrono::{Duration, Local};
use gio::resources_lookup_data;
use gtk::STYLE_PROVIDER_PRIORITY_USER;
use std::path::PathBuf;
use std::{cell::RefCell, rc::Rc};
/// The application window, or the main window, is the main user interface for the app. Almost
/// everything occurs here.
#[derive(Clone)]
pub struct AppWindow {
app_tx: Sender<AppInvocation>,
app: App,
layout: gtk::Box,
current_view: Rc<RefCell<View>>,
settings: gio::Settings,
@ -51,7 +46,7 @@ impl AppWindow {
app_id: &str,
resource_path: &str,
adw_app: &adw::Application,
app_tx: Sender<AppInvocation>,
ft_app: App,
) -> AppWindow {
let window = adw::ApplicationWindow::builder()
.application(adw_app)
@ -103,13 +98,25 @@ impl AppWindow {
window.present();
let s = Self {
app_tx,
app: ft_app,
layout,
current_view: Rc::new(RefCell::new(initial_view)),
settings: gio::Settings::new(app_id),
navigation,
};
glib::spawn_future_local({
let s = s.clone();
async move {
let end = Local::now().date_naive();
let start = end - Duration::days(7);
match s.app.records(start, end).await {
Ok(_) => s.change_view(ViewName::Historical),
Err(_) => s.change_view(ViewName::Welcome),
}
}
});
s
}
@ -117,23 +124,6 @@ impl AppWindow {
self.swap_main(self.construct_view(view));
}
pub fn process_response(&self, response: AppResponse) {
match response {
AppResponse::DatabaseChanged(db_path) => {
self.settings
.set_string("series-path", db_path.to_str().unwrap())
.unwrap();
self.change_view(ViewName::Historical);
}
AppResponse::NoDatabase => {
self.change_view(ViewName::Welcome);
}
AppResponse::Records => {
self.change_view(ViewName::Historical);
}
}
}
// Switch views.
//
// This function only replaces the old view with the one which matches the current view state.
@ -149,13 +139,9 @@ impl AppWindow {
fn construct_view(&self, view: ViewName) -> View {
match view {
ViewName::Welcome => View::Welcome(
WelcomeView::new({
WelcomeView::new(self.app.clone(), {
let s = self.clone();
Box::new(move |path: PathBuf| {
s.app_tx
.send_blocking(AppInvocation::OpenDatabase(path))
.unwrap();
})
move || s.change_view(ViewName::Historical)
})
.upcast(),
),

21
fitnesstrax/app/src/main.rs
View File

@ -43,7 +43,7 @@ fn main() {
};
let settings = gio::Settings::new(app_id);
let app = app::App::new({
let ft_app = app::App::new({
let path = settings.string("series-path");
if path.is_empty() {
None
@ -63,23 +63,9 @@ fn main() {
.unwrap();
adw_app.connect_activate(move |adw_app| {
// These channels are used to send messages to the UI. Anything that needs to send a
// message to the UI will send it via `ui_tx`. We will have one single process that owns
// `ui_rx`. That process will read messages coming in and send them to [AppWindow] for proper
// processing.
//
// The core app will usually only send messages in response to a request, but this channel
// can also be used to tell the UI that something happened in the background, such as
// detecting a watch, detecting new tracks to import, and so forth.
let (ui_tx, ui_rx) = async_channel::unbounded::<app::AppResponse>();
// These channels are used for communicating with the app. Already I can see that a lot of
// different event handlers will need copies of app_tx in order to send requests into the
// UI.
let (app_tx, app_rx) = async_channel::unbounded::<app::AppInvocation>();
let window = AppWindow::new(app_id, RESOURCE_BASE_PATH, adw_app, app_tx.clone());
AppWindow::new(app_id, RESOURCE_BASE_PATH, adw_app, ft_app.clone());
/*
// Spawn a future where the UI will receive messages for the app window. Previously, this
// would have been done by creating a glib::MainContext::channel(), but that has been
// deprecated since gtk 4.10 in favor of using `async_channel`.
@ -105,6 +91,7 @@ fn main() {
}
}
});
*/
});
let args: Vec<String> = env::args().collect();

27
fitnesstrax/app/src/views/welcome_view.rs
View File

@ -14,10 +14,10 @@ General Public License for more details.
You should have received a copy of the GNU General Public License along with FitnessTrax. If not, see <https://www.gnu.org/licenses/>.
*/
use crate::components::FileChooserRow;
use crate::{app::App, components::FileChooserRow};
use glib::Object;
use gtk::{prelude::*, subclass::prelude::*};
use std::path::PathBuf;
use std::rc::Rc;
/// This is the view to show if the application has not yet been configured. It will walk the user
/// through the most critical setup steps so that we can move on to the other views in the app.
@ -43,9 +43,9 @@ glib::wrapper! {
}
impl WelcomeView {
pub fn new<F>(on_save: Box<F>) -> Self
pub fn new<OnSave>(app: App, on_save: OnSave) -> Self
where
F: Fn(PathBuf) + 'static,
OnSave: Fn() + 'static,
{
let s: Self = Object::builder().build();
s.set_orientation(gtk::Orientation::Vertical);
@ -80,12 +80,23 @@ impl WelcomeView {
content.append(&gtk::Label::new(Some("Welcome to FitnessTrax. The application has not yet been configured, so I will walk you through that. Let's start out by selecting your database.")));
content.append(&db_row);
let on_save = on_save;
save_button.connect_clicked({
let on_save = Rc::new(on_save);
let app = app.clone();
let db_row = db_row.clone();
move |_| {
if let Some(path) = db_row.path() {
on_save(path)
}
println!("save button clicked. Do something");
let app = app.clone();
let db_row = db_row.clone();
let on_save = on_save.clone();
glib::spawn_future_local(async move {
println!("{:?}", db_row.path());
if let Some(path) = db_row.path() {
if app.open_db(path).await.is_ok() {
on_save();
}
}
});
}
});