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//! What the session knows about the server: the database list, the sidebar's
//! objects, the schema-search catalog, and switching database.
use std::sync::Arc;
use gpui_kit::component::button::Button;
use gpui_kit::component::button::ButtonVariants as _;
use gpui_kit::component::menu::{DropdownMenu, PopupMenuItem};
use gpui_kit::component::{Disableable, Sizable};
use gpui_kit::prelude::*;
use gpui_kit::{Context, Entity, px};
use crate::db::{Catalog, CatalogEntry, Connection, runtime};
use super::{Session, SessionEvent, Status};
impl Session {
/// Read the database list and the current database's tables and views.
pub(crate) fn reload_metadata(&mut self, cx: &mut Context<Self>) {
let connection = self.connection.clone();
let started_on = connection.clone();
let task = runtime::spawn(async move {
(
connection.databases().await,
connection.objects().await,
connection.stored_objects().await,
connection.catalog().await,
)
});
cx.spawn(async move |this, cx| {
let loaded = task.await;
this.update_in(cx, |this, window, cx| {
// `switch_database` replaces `self.connection` and closes the
// one this task started on, then kicks off its own reload. A
// read still in flight against the old connection at that
// point loses its pool mid-await and comes back an error;
// that error is stale (the fresh reload already has, or will
// have, the right answer), so it is dropped rather than
// shown.
if !Arc::ptr_eq(&this.connection, &started_on) {
return;
}
this.metadata_error = None;
match loaded {
Ok((databases, objects, stored, catalog)) => {
match databases {
Ok(databases) => this.databases = databases,
Err(error) => this.metadata_error = Some(format!("{error:#}")),
}
match objects {
Ok(objects) => this.objects = objects,
Err(error) => this.metadata_error = Some(format!("{error:#}")),
}
match stored {
Ok(stored) => this.stored = stored,
Err(error) => this.metadata_error = Some(format!("{error:#}")),
}
this.store_catalog(catalog);
}
Err(_) => {
this.metadata_error = Some("reading the schema was cancelled".into());
this.catalog_loading = false;
}
}
if let Some(error) = &this.metadata_error {
crate::ui::notify_error(window, cx, format!("Error: {error}"));
}
this.rebuild_tree(cx);
cx.notify();
})
.ok();
})
.detach();
}
/// Keep the catalog read's answer, falling back to the names the sidebar
/// already has when the full read failed — a database whose column query
/// times out should still be searchable by name.
fn store_catalog(&mut self, catalog: Result<Catalog, anyhow::Error>) {
self.catalog_loading = false;
match catalog {
Ok(catalog) => {
self.catalog = Arc::new(catalog);
self.catalog_error = None;
}
Err(error) => {
let mut fallback = Catalog::default();
fallback.entries = self
.objects
.iter()
.cloned()
.map(CatalogEntry::object)
.chain(self.stored.iter().cloned().map(CatalogEntry::routine))
.collect();
fallback.total = fallback.entries.len();
self.catalog = Arc::new(fallback);
self.catalog_error = Some(format!("{error:#}"));
}
}
}
/// The whole schema, for [`SearchSchema`].
pub(crate) fn catalog(&self) -> Arc<Catalog> {
self.catalog.clone()
}
pub(crate) fn catalog_loading(&self) -> bool {
self.catalog_loading
}
pub(crate) fn catalog_error(&self) -> Option<&str> {
self.catalog_error.as_deref()
}
/// Reopen the pool against `database` and reload the object list.
///
/// No engine can move an open pool to another database, so this replaces
/// the connection and drains the old one in the background.
pub(crate) fn switch_database(&mut self, database: String, cx: &mut Context<Self>) {
// A file-based engine has a single database; "switching" would try to
// open a file named after it.
if self.connection.config.engine.is_file_based() {
return;
}
if self.switching || database == self.connection.database() {
return;
}
self.switching = true;
cx.notify();
let connection = self.connection.clone();
let task = runtime::spawn(async move { connection.with_database(&database).await });
cx.spawn(async move |this, cx| {
let opened = task.await;
this.update_in(cx, |this, window, cx| {
this.switching = false;
match opened {
Ok(Ok(connection)) => {
this.adopt_connection(connection, cx);
cx.emit(SessionEvent::Changed);
}
Ok(Err(error)) => {
let message = format!("{error:#}");
if let Some(panel) = this.active_panel() {
panel.update(cx, |panel, _| {
panel.set_status(Status::Error(message.clone()))
});
}
crate::ui::notify_error(window, cx, format!("Error: {message}"));
}
Err(_) => {
let message = "switching database was cancelled";
if let Some(panel) = this.active_panel() {
panel.update(cx, |panel, _| {
panel.set_status(Status::Error(message.into()))
});
}
crate::ui::notify_error(window, cx, format!("Error: {message}"));
}
}
cx.notify();
})
.ok();
})
.detach();
}
/// Swap `self.connection` for a freshly opened one on another database:
/// close what it replaces, carry its console history forward, reset the
/// schema read, and point every open panel at the new connection.
///
/// Shared by [`Self::switch_database`] and a restore that switches before
/// building any tabs, so both keep the panels, the catalog, and the
/// console in step the same way.
pub(super) fn adopt_connection(&mut self, connection: Connection, cx: &mut Context<Self>) {
let previous = std::mem::replace(&mut self.connection, Arc::new(connection));
// The console's history belongs to the tab, not the pool about to
// close: an internal read that failed right before the switch (or
// any read from before it) should still be there to look at
// afterward rather than vanish with the connection that logged it.
for entry in previous.query_log().snapshot() {
self.connection.query_log().record(entry);
}
runtime::spawn(async move { previous.close().await });
self.objects.clear();
self.stored.clear();
self.catalog = Arc::new(Catalog::default());
self.catalog_loading = true;
self.catalog_error = None;
self.rebuild_tree(cx);
let connection = self.connection.clone();
for panel in self.panels.clone() {
let connection = connection.clone();
panel.update(cx, |panel, cx| panel.set_connection(connection, cx));
}
self.reload_metadata(cx);
}
/// The database dropdown, rendered by whoever owns the toolbar.
///
/// Sized and styled here rather than by the caller: `dropdown_menu`
/// wraps the button in a popover that does not itself implement
/// [`Sizable`]/[`ButtonVariants`].
pub(crate) fn render_database_picker(
session: &Entity<Session>,
cx: &mut gpui_kit::App,
) -> impl IntoElement {
let this = session.read(cx);
let current = this.connection.database().to_string();
// A SQLite connection is one file: there is nothing to switch to, and
// its "databases" (main, plus attachments) are not separate files.
if this.connection.config.engine.is_file_based() {
return Button::new("database")
.custom(crate::ui::subtle_button(cx))
.xsmall()
.max_w(px(160.))
.icon(gpui_kit::assets::IconName::Database)
.label(crate::db::file_name(¤t))
.disabled(true)
.into_any_element();
}
let databases = this.databases.clone();
let weak = session.downgrade();
let label = if this.switching {
"Switching…".to_string()
} else if current.is_empty() {
"No database".to_string()
} else {
current.clone()
};
Button::new("database")
.custom(crate::ui::subtle_button(cx))
.xsmall()
.max_w(px(160.))
.icon(gpui_kit::assets::IconName::Database)
.label(label)
.dropdown_menu(move |mut menu, _window, _cx| {
if databases.is_empty() {
return menu.label("No databases");
}
for database in &databases {
let name = database.clone();
let weak = weak.clone();
menu = menu.item(
PopupMenuItem::new(database.clone())
.checked(*database == current)
.on_click(move |_, _window, cx| {
let name = name.clone();
if let Some(session) = weak.upgrade() {
session.update(cx, |session, cx| {
session.switch_database(name, cx)
});
}
}),
);
}
menu.scrollable(true).max_h(px(420.))
})
.into_any_element()
}
}