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add screenshot preview logic

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This commit is contained in:
E44
2025-11-01 16:28:22 +01:00
parent 67fe1a4e83
commit 7420e15892
9 changed files with 138 additions and 28 deletions
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control/frontend/src/ts/stores/displays.ts
+47 -3
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@@ -1,7 +1,8 @@
import { get, writable, type Writable } from "svelte/store";
import type { Display, DisplayGroup } from "../types";
import { is_selected, select, selected_display_ids } from "./select";
import { get_uuid } from "../utils";
import { get_uuid, image_content_hash } from "../utils";
import { get_screenshot } from "../api_handler";
export const displays: Writable<DisplayGroup[]> = writable<DisplayGroup[]>([{
id: get_uuid(),
@@ -11,7 +12,7 @@ export const displays: Writable<DisplayGroup[]> = writable<DisplayGroup[]>([{
function add_display(ip: string, mac: string, name: string, status: string) {
displays.update((displays: DisplayGroup[]) => {
displays[0].data.push({ id: get_uuid(), ip, mac, name, status });
displays[0].data.push({ id: get_uuid(), ip, preview_url: null, preview_timeout_id: null, mac, name, status });
return displays;
});
}
@@ -78,6 +79,48 @@ export function remove_empty_display_groups() {
});
}
export async function update_screenshot(display_id: string, check_type: "first_check" | "last_check_different" | "last_check_same" = "first_check") {
const display_ip = get_display_by_id(display_id)?.ip;
if (!display_ip) return;
const new_blob = await get_screenshot(display_ip);
const display = get_display_by_id(display_id);
let update_needed = check_type === "first_check";
if (check_type !== "first_check") {
if (display && display.preview_url) {
const old_blob = await fetch(display.preview_url).then(r => r.blob());
const new_hash = await image_content_hash(new_blob);
const old_hash = await image_content_hash(old_blob);
console.log(old_hash, new_hash);
update_needed = old_hash !== new_hash; // if different -> update
}
}
let new_preview_timeout_id: number | null = null;
if (update_needed || check_type === "last_check_different") {
new_preview_timeout_id = setTimeout(async () => { await update_screenshot(display_id, update_needed ? "last_check_different" : "last_check_same") }, 2 * 1000);
}
if (display?.preview_timeout_id) {
clearInterval(display.preview_timeout_id);
}
if (update_needed) {
displays.update((display_groups) =>
display_groups.map((group) => ({
...group,
data: group.data.map((display) => {
if (display.id !== display_id) return display;
if (display.preview_url) {
URL.revokeObjectURL(display.preview_url);
}
const new_url = URL.createObjectURL(new_blob);
return { ...display, preview_url: new_url, preview_timeout_id: new_preview_timeout_id };
}),
}))
);
}
}
add_testing_displays();
@@ -87,5 +130,6 @@ function add_testing_displays() {
// add_display("127.0.0.1", "00:1A:2B:3C:4D:5E", name, "Offline");
// }
add_display("127.0.0.1", "00:1A:2B:3C:4D:5E", "Test", "Offline")
add_display("127.0.0.1", "00:1A:2B:3C:4D:5E", "PC", "Offline");
// add_display("192.168.178.111", "D4:81:D7:C0:DF:3C", "Laptop", "Online");
}