Start on a database-backed prompt library (#12468)

Using the file system as a database seems like it's easy, but it's
actually a real pain. I'd like to use LMDB to store the prompts locally
so we have more control. We can always add an export option, but I want
the source of truth to be somewhere other than the file system.

So far, I have a PromptStore which is global to the application and can
be initialized on startup. Then there's a `PromptLibrary` which is
intended to be the root of a new kind of Zed window. I haven't actually
seen pixels yet, but I've sketched out the basics needed to create a new
prompt, save, etc.

Still lots to figure out but the foundations of being backed by a DB and
rendering in an independent window are in place.

/cc @iamnbutler @as-cii 

Release Notes:

- N/A

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>
This commit is contained in:
Nathan Sobo 2024-06-03 07:58:43 -06:00 committed by GitHub
parent 18e2b43d6d
commit 5f98b9617a
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25 changed files with 1427 additions and 1429 deletions

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@ -0,0 +1,935 @@
use anyhow::{anyhow, Result};
use chrono::{DateTime, Utc};
use collections::HashMap;
use editor::{Editor, EditorEvent};
use futures::{
future::{self, BoxFuture, Shared},
FutureExt,
};
use fuzzy::StringMatchCandidate;
use gpui::{
actions, point, size, AppContext, BackgroundExecutor, Bounds, DevicePixels, Empty,
EventEmitter, Global, PromptLevel, ReadGlobal, Subscription, Task, TitlebarOptions, View,
WindowBounds, WindowHandle, WindowOptions,
};
use heed::{types::SerdeBincode, Database, RoTxn};
use language::{language_settings::SoftWrap, Buffer, LanguageRegistry};
use parking_lot::RwLock;
use picker::{Picker, PickerDelegate};
use rope::Rope;
use serde::{Deserialize, Serialize};
use std::{
cmp::Reverse,
future::Future,
path::PathBuf,
sync::{atomic::AtomicBool, Arc},
time::Duration,
};
use ui::{
div, prelude::*, IconButtonShape, ListItem, ListItemSpacing, ParentElement, Render,
SharedString, Styled, TitleBar, Tooltip, ViewContext, VisualContext,
};
use util::{paths::PROMPTS_DIR, ResultExt, TryFutureExt};
use uuid::Uuid;
actions!(
prompt_library,
[NewPrompt, DeletePrompt, ToggleDefaultPrompt]
);
/// Init starts loading the PromptStore in the background and assigns
/// a shared future to a global.
pub fn init(cx: &mut AppContext) {
let db_path = PROMPTS_DIR.join("prompts-library-db.0.mdb");
let prompt_store_future = PromptStore::new(db_path, cx.background_executor().clone())
.then(|result| future::ready(result.map(Arc::new).map_err(Arc::new)))
.boxed()
.shared();
cx.set_global(GlobalPromptStore(prompt_store_future))
}
/// This function opens a new prompt library window if one doesn't exist already.
/// If one exists, it brings it to the foreground.
///
/// Note that, when opening a new window, this waits for the PromptStore to be
/// initialized. If it was initialized successfully, it returns a window handle
/// to a prompt library.
pub fn open_prompt_library(
language_registry: Arc<LanguageRegistry>,
cx: &mut AppContext,
) -> Task<Result<WindowHandle<PromptLibrary>>> {
let existing_window = cx
.windows()
.into_iter()
.find_map(|window| window.downcast::<PromptLibrary>());
if let Some(existing_window) = existing_window {
existing_window
.update(cx, |_, cx| cx.activate_window())
.ok();
Task::ready(Ok(existing_window))
} else {
let store = PromptStore::global(cx);
cx.spawn(|cx| async move {
let store = store.await?;
cx.update(|cx| {
let bounds = Bounds::centered(
None,
size(DevicePixels::from(1024), DevicePixels::from(768)),
cx,
);
cx.open_window(
WindowOptions {
titlebar: Some(TitlebarOptions {
title: None,
appears_transparent: true,
traffic_light_position: Some(point(px(9.0), px(9.0))),
}),
window_bounds: Some(WindowBounds::Windowed(bounds)),
..Default::default()
},
|cx| cx.new_view(|cx| PromptLibrary::new(store, language_registry, cx)),
)
})
})
}
}
pub struct PromptLibrary {
store: Arc<PromptStore>,
language_registry: Arc<LanguageRegistry>,
prompt_editors: HashMap<PromptId, PromptEditor>,
active_prompt_id: Option<PromptId>,
picker: View<Picker<PromptPickerDelegate>>,
pending_load: Task<()>,
_subscriptions: Vec<Subscription>,
}
struct PromptEditor {
editor: View<Editor>,
next_body_to_save: Option<Rope>,
pending_save: Option<Task<Option<()>>>,
_subscription: Subscription,
}
struct PromptPickerDelegate {
store: Arc<PromptStore>,
selected_index: usize,
matches: Vec<PromptMetadata>,
}
enum PromptPickerEvent {
Confirmed { prompt_id: PromptId },
Deleted { prompt_id: PromptId },
ToggledDefault { prompt_id: PromptId },
}
impl EventEmitter<PromptPickerEvent> for Picker<PromptPickerDelegate> {}
impl PickerDelegate for PromptPickerDelegate {
type ListItem = ListItem;
fn match_count(&self) -> usize {
self.matches.len()
}
fn selected_index(&self) -> usize {
self.selected_index
}
fn set_selected_index(&mut self, ix: usize, _cx: &mut ViewContext<Picker<Self>>) {
self.selected_index = ix;
}
fn placeholder_text(&self, _cx: &mut WindowContext) -> Arc<str> {
"Search...".into()
}
fn update_matches(&mut self, query: String, cx: &mut ViewContext<Picker<Self>>) -> Task<()> {
let search = self.store.search(query);
cx.spawn(|this, mut cx| async move {
let matches = search.await;
this.update(&mut cx, |this, cx| {
this.delegate.selected_index = 0;
this.delegate.matches = matches;
cx.notify();
})
.ok();
})
}
fn confirm(&mut self, _secondary: bool, cx: &mut ViewContext<Picker<Self>>) {
if let Some(prompt) = self.matches.get(self.selected_index) {
cx.emit(PromptPickerEvent::Confirmed {
prompt_id: prompt.id,
});
}
}
fn dismissed(&mut self, _cx: &mut ViewContext<Picker<Self>>) {}
fn render_match(
&self,
ix: usize,
selected: bool,
cx: &mut ViewContext<Picker<Self>>,
) -> Option<Self::ListItem> {
let prompt = self.matches.get(ix)?;
let default = prompt.default;
let prompt_id = prompt.id;
Some(
ListItem::new(ix)
.inset(true)
.spacing(ListItemSpacing::Sparse)
.selected(selected)
.child(Label::new(
prompt.title.clone().unwrap_or("Untitled".into()),
))
.end_slot(if default {
IconButton::new("toggle-default-prompt", IconName::StarFilled)
.shape(IconButtonShape::Square)
.into_any_element()
} else {
Empty.into_any()
})
.end_hover_slot(
h_flex()
.gap_2()
.child(
IconButton::new("delete-prompt", IconName::Trash)
.shape(IconButtonShape::Square)
.tooltip(move |cx| Tooltip::text("Delete Prompt", cx))
.on_click(cx.listener(move |_, _, cx| {
cx.emit(PromptPickerEvent::Deleted { prompt_id })
})),
)
.child(
IconButton::new(
"toggle-default-prompt",
if default {
IconName::StarFilled
} else {
IconName::Star
},
)
.shape(IconButtonShape::Square)
.tooltip(move |cx| {
Tooltip::text(
if default {
"Remove from Default Prompt"
} else {
"Add to Default Prompt"
},
cx,
)
})
.on_click(cx.listener(move |_, _, cx| {
cx.emit(PromptPickerEvent::ToggledDefault { prompt_id })
})),
),
),
)
}
}
impl PromptLibrary {
fn new(
store: Arc<PromptStore>,
language_registry: Arc<LanguageRegistry>,
cx: &mut ViewContext<Self>,
) -> Self {
let delegate = PromptPickerDelegate {
store: store.clone(),
selected_index: 0,
matches: Vec::new(),
};
let picker = cx.new_view(|cx| {
let picker = Picker::uniform_list(delegate, cx)
.modal(false)
.max_height(None);
picker.focus(cx);
picker
});
let mut this = Self {
store: store.clone(),
language_registry,
prompt_editors: HashMap::default(),
active_prompt_id: None,
pending_load: Task::ready(()),
_subscriptions: vec![cx.subscribe(&picker, Self::handle_picker_event)],
picker,
};
if let Some(prompt_id) = store.most_recently_saved() {
this.load_prompt(prompt_id, false, cx);
}
this
}
fn handle_picker_event(
&mut self,
_: View<Picker<PromptPickerDelegate>>,
event: &PromptPickerEvent,
cx: &mut ViewContext<Self>,
) {
match event {
PromptPickerEvent::Confirmed { prompt_id } => {
self.load_prompt(*prompt_id, true, cx);
}
PromptPickerEvent::ToggledDefault { prompt_id } => {
self.toggle_default_for_prompt(*prompt_id, cx);
}
PromptPickerEvent::Deleted { prompt_id } => {
self.delete_prompt(*prompt_id, cx);
}
}
}
pub fn new_prompt(&mut self, cx: &mut ViewContext<Self>) {
let prompt_id = PromptId::new();
let save = self.store.save(prompt_id, None, false, "".into());
self.picker.update(cx, |picker, cx| picker.refresh(cx));
cx.spawn(|this, mut cx| async move {
save.await?;
this.update(&mut cx, |this, cx| this.load_prompt(prompt_id, true, cx))
})
.detach_and_log_err(cx);
}
pub fn save_prompt(&mut self, prompt_id: PromptId, cx: &mut ViewContext<Self>) {
const SAVE_THROTTLE: Duration = Duration::from_millis(500);
let prompt_metadata = self.store.metadata(prompt_id).unwrap();
let prompt_editor = self.prompt_editors.get_mut(&prompt_id).unwrap();
let body = prompt_editor.editor.update(cx, |editor, cx| {
editor
.buffer()
.read(cx)
.as_singleton()
.unwrap()
.read(cx)
.as_rope()
.clone()
});
let store = self.store.clone();
let executor = cx.background_executor().clone();
prompt_editor.next_body_to_save = Some(body);
if prompt_editor.pending_save.is_none() {
prompt_editor.pending_save = Some(cx.spawn(|this, mut cx| {
async move {
loop {
let next_body_to_save = this.update(&mut cx, |this, _| {
this.prompt_editors
.get_mut(&prompt_id)?
.next_body_to_save
.take()
})?;
if let Some(body) = next_body_to_save {
let title = title_from_body(body.chars_at(0));
store
.save(prompt_id, title, prompt_metadata.default, body)
.await
.log_err();
this.update(&mut cx, |this, cx| {
this.picker.update(cx, |picker, cx| picker.refresh(cx));
cx.notify();
})?;
executor.timer(SAVE_THROTTLE).await;
} else {
break;
}
}
this.update(&mut cx, |this, _cx| {
if let Some(prompt_editor) = this.prompt_editors.get_mut(&prompt_id) {
prompt_editor.pending_save = None;
}
})
}
.log_err()
}));
}
}
pub fn delete_active_prompt(&mut self, cx: &mut ViewContext<Self>) {
if let Some(active_prompt_id) = self.active_prompt_id {
self.delete_prompt(active_prompt_id, cx);
}
}
pub fn toggle_default_for_active_prompt(&mut self, cx: &mut ViewContext<Self>) {
if let Some(active_prompt_id) = self.active_prompt_id {
self.toggle_default_for_prompt(active_prompt_id, cx);
}
}
pub fn toggle_default_for_prompt(&mut self, prompt_id: PromptId, cx: &mut ViewContext<Self>) {
if let Some(prompt_metadata) = self.store.metadata(prompt_id) {
self.store
.save_metadata(prompt_id, prompt_metadata.title, !prompt_metadata.default)
.detach_and_log_err(cx);
self.picker.update(cx, |picker, cx| picker.refresh(cx));
cx.notify();
}
}
pub fn load_prompt(&mut self, prompt_id: PromptId, focus: bool, cx: &mut ViewContext<Self>) {
if let Some(prompt_editor) = self.prompt_editors.get(&prompt_id) {
if focus {
prompt_editor
.editor
.update(cx, |editor, cx| editor.focus(cx));
}
self.active_prompt_id = Some(prompt_id);
} else {
let language_registry = self.language_registry.clone();
let prompt = self.store.load(prompt_id);
self.pending_load = cx.spawn(|this, mut cx| async move {
let prompt = prompt.await;
let markdown = language_registry.language_for_name("Markdown").await;
this.update(&mut cx, |this, cx| match prompt {
Ok(prompt) => {
let buffer = cx.new_model(|cx| {
let mut buffer = Buffer::local(prompt, cx);
buffer.set_language(markdown.log_err(), cx);
buffer.set_language_registry(language_registry);
buffer
});
let editor = cx.new_view(|cx| {
let mut editor = Editor::for_buffer(buffer, None, cx);
editor.set_soft_wrap_mode(SoftWrap::EditorWidth, cx);
editor.set_show_gutter(false, cx);
editor.set_show_wrap_guides(false, cx);
editor.set_show_indent_guides(false, cx);
if focus {
editor.focus(cx);
}
editor
});
let _subscription =
cx.subscribe(&editor, move |this, _editor, event, cx| {
this.handle_prompt_editor_event(prompt_id, event, cx)
});
this.prompt_editors.insert(
prompt_id,
PromptEditor {
editor,
next_body_to_save: None,
pending_save: None,
_subscription,
},
);
this.active_prompt_id = Some(prompt_id);
cx.notify();
}
Err(error) => {
// TODO: we should show the error in the UI.
log::error!("error while loading prompt: {:?}", error);
}
})
.ok();
});
}
}
pub fn delete_prompt(&mut self, prompt_id: PromptId, cx: &mut ViewContext<Self>) {
if let Some(metadata) = self.store.metadata(prompt_id) {
let confirmation = cx.prompt(
PromptLevel::Warning,
&format!(
"Are you sure you want to delete {}",
metadata.title.unwrap_or("Untitled".into())
),
None,
&["Delete", "Cancel"],
);
cx.spawn(|this, mut cx| async move {
if confirmation.await.ok() == Some(0) {
this.update(&mut cx, |this, cx| {
if this.active_prompt_id == Some(prompt_id) {
this.active_prompt_id = None;
}
this.prompt_editors.remove(&prompt_id);
this.store.delete(prompt_id).detach_and_log_err(cx);
this.picker.update(cx, |picker, cx| picker.refresh(cx));
cx.notify();
})?;
}
anyhow::Ok(())
})
.detach_and_log_err(cx);
}
}
fn handle_prompt_editor_event(
&mut self,
prompt_id: PromptId,
event: &EditorEvent,
cx: &mut ViewContext<Self>,
) {
if let EditorEvent::BufferEdited = event {
let prompt_editor = self.prompt_editors.get(&prompt_id).unwrap();
let buffer = prompt_editor
.editor
.read(cx)
.buffer()
.read(cx)
.as_singleton()
.unwrap();
buffer.update(cx, |buffer, cx| {
let mut chars = buffer.chars_at(0);
match chars.next() {
Some('#') => {
if chars.next() != Some(' ') {
drop(chars);
buffer.edit([(1..1, " ")], None, cx);
}
}
Some(' ') => {
drop(chars);
buffer.edit([(0..0, "#")], None, cx);
}
_ => {
drop(chars);
buffer.edit([(0..0, "# ")], None, cx);
}
}
});
self.save_prompt(prompt_id, cx);
}
}
fn render_prompt_list(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
v_flex()
.id("prompt-list")
.bg(cx.theme().colors().panel_background)
.h_full()
.w_1_3()
.overflow_x_hidden()
.child(
h_flex()
.p(Spacing::Small.rems(cx))
.border_b_1()
.border_color(cx.theme().colors().border)
.h(TitleBar::height(cx))
.w_full()
.flex_none()
.justify_end()
.child(
IconButton::new("new-prompt", IconName::Plus)
.shape(IconButtonShape::Square)
.tooltip(move |cx| Tooltip::for_action("New Prompt", &NewPrompt, cx))
.on_click(|_, cx| {
cx.dispatch_action(Box::new(NewPrompt));
}),
),
)
.child(div().flex_grow().child(self.picker.clone()))
}
fn render_active_prompt(&mut self, cx: &mut ViewContext<PromptLibrary>) -> gpui::Stateful<Div> {
div()
.w_2_3()
.h_full()
.id("prompt-editor")
.border_l_1()
.border_color(cx.theme().colors().border)
.bg(cx.theme().colors().editor_background)
.flex_none()
.min_w_64()
.children(self.active_prompt_id.and_then(|prompt_id| {
let prompt_metadata = self.store.metadata(prompt_id)?;
let editor = self.prompt_editors[&prompt_id].editor.clone();
Some(
v_flex()
.size_full()
.child(
h_flex()
.h(TitleBar::height(cx))
.px(Spacing::Large.rems(cx))
.justify_end()
.child(
h_flex()
.gap_4()
.child(
IconButton::new(
"toggle-default-prompt",
if prompt_metadata.default {
IconName::StarFilled
} else {
IconName::Star
},
)
.shape(IconButtonShape::Square)
.tooltip(move |cx| {
Tooltip::for_action(
if prompt_metadata.default {
"Remove from Default Prompt"
} else {
"Add to Default Prompt"
},
&ToggleDefaultPrompt,
cx,
)
})
.on_click(
|_, cx| {
cx.dispatch_action(Box::new(
ToggleDefaultPrompt,
));
},
),
)
.child(
IconButton::new("delete-prompt", IconName::Trash)
.shape(IconButtonShape::Square)
.tooltip(move |cx| {
Tooltip::for_action(
"Delete Prompt",
&DeletePrompt,
cx,
)
})
.on_click(|_, cx| {
cx.dispatch_action(Box::new(DeletePrompt));
}),
),
),
)
.child(div().flex_grow().p(Spacing::Large.rems(cx)).child(editor)),
)
}))
}
}
impl Render for PromptLibrary {
fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
h_flex()
.id("prompt-manager")
.key_context("PromptLibrary")
.on_action(cx.listener(|this, &NewPrompt, cx| this.new_prompt(cx)))
.on_action(cx.listener(|this, &DeletePrompt, cx| this.delete_active_prompt(cx)))
.on_action(cx.listener(|this, &ToggleDefaultPrompt, cx| {
this.toggle_default_for_active_prompt(cx)
}))
.size_full()
.overflow_hidden()
.child(self.render_prompt_list(cx))
.child(self.render_active_prompt(cx))
}
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct PromptMetadata {
pub id: PromptId,
pub title: Option<SharedString>,
pub default: bool,
pub saved_at: DateTime<Utc>,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub struct PromptId(Uuid);
impl PromptId {
pub fn new() -> PromptId {
PromptId(Uuid::new_v4())
}
}
pub struct PromptStore {
executor: BackgroundExecutor,
env: heed::Env,
bodies: Database<SerdeBincode<PromptId>, SerdeBincode<String>>,
metadata: Database<SerdeBincode<PromptId>, SerdeBincode<PromptMetadata>>,
metadata_cache: RwLock<MetadataCache>,
updates: (Arc<async_watch::Sender<()>>, async_watch::Receiver<()>),
}
#[derive(Default)]
struct MetadataCache {
metadata: Vec<PromptMetadata>,
metadata_by_id: HashMap<PromptId, PromptMetadata>,
}
impl MetadataCache {
fn from_db(
db: Database<SerdeBincode<PromptId>, SerdeBincode<PromptMetadata>>,
txn: &RoTxn,
) -> Result<Self> {
let mut cache = MetadataCache::default();
for result in db.iter(txn)? {
let (prompt_id, metadata) = result?;
cache.metadata.push(metadata.clone());
cache.metadata_by_id.insert(prompt_id, metadata);
}
cache
.metadata
.sort_unstable_by_key(|metadata| Reverse(metadata.saved_at));
Ok(cache)
}
fn insert(&mut self, metadata: PromptMetadata) {
self.metadata_by_id.insert(metadata.id, metadata.clone());
if let Some(old_metadata) = self.metadata.iter_mut().find(|m| m.id == metadata.id) {
*old_metadata = metadata;
} else {
self.metadata.push(metadata);
}
self.metadata.sort_by_key(|m| Reverse(m.saved_at));
}
fn remove(&mut self, id: PromptId) {
self.metadata.retain(|metadata| metadata.id != id);
self.metadata_by_id.remove(&id);
}
}
impl PromptStore {
pub fn global(cx: &AppContext) -> impl Future<Output = Result<Arc<Self>>> {
let store = GlobalPromptStore::global(cx).0.clone();
async move { store.await.map_err(|err| anyhow!(err)) }
}
pub fn new(db_path: PathBuf, executor: BackgroundExecutor) -> Task<Result<Self>> {
executor.spawn({
let executor = executor.clone();
async move {
std::fs::create_dir_all(&db_path)?;
let db_env = unsafe {
heed::EnvOpenOptions::new()
.map_size(1024 * 1024 * 1024) // 1GB
.max_dbs(2) // bodies and metadata
.open(db_path)?
};
let mut txn = db_env.write_txn()?;
let bodies = db_env.create_database(&mut txn, Some("bodies"))?;
let metadata = db_env.create_database(&mut txn, Some("metadata"))?;
let metadata_cache = MetadataCache::from_db(metadata, &txn)?;
txn.commit()?;
let (updates_tx, updates_rx) = async_watch::channel(());
Ok(PromptStore {
executor,
env: db_env,
bodies,
metadata,
metadata_cache: RwLock::new(metadata_cache),
updates: (Arc::new(updates_tx), updates_rx),
})
}
})
}
pub fn updates(&self) -> async_watch::Receiver<()> {
self.updates.1.clone()
}
pub fn load(&self, id: PromptId) -> Task<Result<String>> {
let env = self.env.clone();
let bodies = self.bodies;
self.executor.spawn(async move {
let txn = env.read_txn()?;
bodies
.get(&txn, &id)?
.ok_or_else(|| anyhow!("prompt not found"))
})
}
pub fn load_default(&self) -> Task<Result<Vec<(PromptMetadata, String)>>> {
let default_metadatas = self
.metadata_cache
.read()
.metadata
.iter()
.filter(|metadata| metadata.default)
.cloned()
.collect::<Vec<_>>();
let env = self.env.clone();
let bodies = self.bodies;
self.executor.spawn(async move {
let txn = env.read_txn()?;
let mut default_prompts = Vec::new();
for metadata in default_metadatas {
if let Some(body) = bodies.get(&txn, &metadata.id)? {
if !body.is_empty() {
default_prompts.push((metadata, body));
}
}
}
default_prompts.sort_unstable_by_key(|(metadata, _)| metadata.saved_at);
Ok(default_prompts)
})
}
pub fn delete(&self, id: PromptId) -> Task<Result<()>> {
self.metadata_cache.write().remove(id);
let db_connection = self.env.clone();
let bodies = self.bodies;
let metadata = self.metadata;
self.executor.spawn(async move {
let mut txn = db_connection.write_txn()?;
metadata.delete(&mut txn, &id)?;
bodies.delete(&mut txn, &id)?;
txn.commit()?;
Ok(())
})
}
fn metadata(&self, id: PromptId) -> Option<PromptMetadata> {
self.metadata_cache.read().metadata_by_id.get(&id).cloned()
}
pub fn id_for_title(&self, title: &str) -> Option<PromptId> {
let metadata_cache = self.metadata_cache.read();
let metadata = metadata_cache
.metadata
.iter()
.find(|metadata| metadata.title.as_ref().map(|title| &***title) == Some(title))?;
Some(metadata.id)
}
pub fn search(&self, query: String) -> Task<Vec<PromptMetadata>> {
let cached_metadata = self.metadata_cache.read().metadata.clone();
let executor = self.executor.clone();
self.executor.spawn(async move {
if query.is_empty() {
cached_metadata
} else {
let candidates = cached_metadata
.iter()
.enumerate()
.filter_map(|(ix, metadata)| {
Some(StringMatchCandidate::new(
ix,
metadata.title.as_ref()?.to_string(),
))
})
.collect::<Vec<_>>();
let matches = fuzzy::match_strings(
&candidates,
&query,
false,
100,
&AtomicBool::default(),
executor,
)
.await;
matches
.into_iter()
.map(|mat| cached_metadata[mat.candidate_id].clone())
.collect()
}
})
}
fn save(
&self,
id: PromptId,
title: Option<SharedString>,
default: bool,
body: Rope,
) -> Task<Result<()>> {
let prompt_metadata = PromptMetadata {
id,
title,
default,
saved_at: Utc::now(),
};
self.metadata_cache.write().insert(prompt_metadata.clone());
let db_connection = self.env.clone();
let bodies = self.bodies;
let metadata = self.metadata;
let updates = self.updates.0.clone();
self.executor.spawn(async move {
let mut txn = db_connection.write_txn()?;
metadata.put(&mut txn, &id, &prompt_metadata)?;
bodies.put(&mut txn, &id, &body.to_string())?;
txn.commit()?;
updates.send(()).ok();
Ok(())
})
}
fn save_metadata(
&self,
id: PromptId,
title: Option<SharedString>,
default: bool,
) -> Task<Result<()>> {
let prompt_metadata = PromptMetadata {
id,
title,
default,
saved_at: Utc::now(),
};
self.metadata_cache.write().insert(prompt_metadata.clone());
let db_connection = self.env.clone();
let metadata = self.metadata;
let updates = self.updates.0.clone();
self.executor.spawn(async move {
let mut txn = db_connection.write_txn()?;
metadata.put(&mut txn, &id, &prompt_metadata)?;
txn.commit()?;
updates.send(()).ok();
Ok(())
})
}
fn most_recently_saved(&self) -> Option<PromptId> {
self.metadata_cache
.read()
.metadata
.first()
.map(|metadata| metadata.id)
}
}
/// Wraps a shared future to a prompt store so it can be assigned as a context global.
pub struct GlobalPromptStore(
Shared<BoxFuture<'static, Result<Arc<PromptStore>, Arc<anyhow::Error>>>>,
);
impl Global for GlobalPromptStore {}
fn title_from_body(body: impl IntoIterator<Item = char>) -> Option<SharedString> {
let mut chars = body.into_iter().take_while(|c| *c != '\n').peekable();
let mut level = 0;
while let Some('#') = chars.peek() {
level += 1;
chars.next();
}
if level > 0 {
let title = chars.collect::<String>().trim().to_string();
if title.is_empty() {
None
} else {
Some(title.into())
}
} else {
None
}
}