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cache timelines

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This commit is contained in:
William Casarin 2022-11-20 19:49:43 -08:00
parent e7973a2d84
commit 86f4aa836f
2 changed files with 42 additions and 9 deletions
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48
web/js/damus.js
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@ -166,7 +166,8 @@ async function damus_web_init_ready()
model.ids = ids
model.pool = pool
model.all_events = load_events(model)
load_cache(model)
model.view_el = document.querySelector("#view")
switch_view('home')
@ -584,7 +585,7 @@ function schedule_save_events(damus)
{
if (damus.save_timer)
clearTimeout(damus.save_timer)
damus.save_timer = setTimeout(save_events.bind(null, damus), 5000)
damus.save_timer = setTimeout(save_cache.bind(null, damus), 3000)
}
function is_valid_time(now_sec, created_at)
@ -608,7 +609,7 @@ function calculate_last_of_kind(evs)
if (!is_valid_time(now_sec, ev.created_at))
return obj
const prev = obj[ev.kind] || 0
obj[ev.kind] = max(ev.created_at, prev)
obj[ev.kind] = get_since_time(max(ev.created_at, prev))
return obj
}, {})
}
@ -626,6 +627,17 @@ function load_events(damus)
}, {})
}
function load_cache(damus)
{
damus.all_events = load_events(damus)
load_timelines(damus)
}
function save_cache(damus)
{
save_events(damus)
save_timelines(damus)
}
function save_events(damus)
{
@ -644,8 +656,8 @@ function save_events(damus)
let cached = keys.map((key) => {
const ev = damus.all_events[key]
const {pubkey, content, tags, kind, created_at, id} = ev
return {pubkey, content, tags, kind, created_at, id}
const {sig, pubkey, content, tags, kind, created_at, id} = ev
return {sig, pubkey, content, tags, kind, created_at, id}
})
cached.sort((a,b) => b.created_at - a.created_at)
@ -661,6 +673,30 @@ function save_events(damus)
localStorage.setItem('event_cache', JSON.stringify(cached))
}
function save_timelines(damus)
{
const views = Object.keys(damus.views).reduce((obj, view_name) => {
const view = damus.views[view_name]
obj[view_name] = view.events.map(e => e.id).slice(0,100)
return obj
}, {})
localStorage.setItem('views', JSON.stringify(views))
}
function load_timelines(damus)
{
if (!('views' in localStorage))
return
const stored_views = JSON.parse(localStorage.getItem('views'))
for (const view_name of Object.keys(damus.views)) {
const view = damus.views[view_name]
view.events = (stored_views[view_name] || []).reduce((evs, evid) => {
const ev = damus.all_events[evid]
if (ev) evs.push(ev)
return evs
}, [])
}
}
function handle_home_event(model, relay, sub_id, ev) {
const ids = model.ids
@ -764,7 +800,7 @@ function send_home_filters(model, relay) {
model.last_event_of_kind[relay] =
model.last_event_of_kind[relay] || calculate_last_of_kind(model.all_events)
console.log("last_of_kind", last_of_kind)
log_debug("last_of_kind", last_of_kind)
}
update_filters_with_since(last_of_kind, home_filters)