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feat(eguard): implement SessionGuard — session keep-alive guard
- Update eguard.c: full LVGL UI with status display, timer, toggle button, and interval dropdown (30s/60s/120s/300s) - Add build.gradle.kts: Kotlin Compose Multiplatform build config - Add App.kt: Compose UI with guard status card, session uptime timer, start/stop toggle, interval selector, and info panel - Prevents sleep, screen lock, and idle timeout - Cross-platform: macOS (caffeinate), Windows (SetThreadExecutionState), Linux (systemd-inhibit) - Version bump: 2.0.0 → 3.0.0
1 parent 25052d4 commit 0a7e522

3 files changed

Lines changed: 266 additions & 4 deletions

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‎apps/eguard/build.gradle.kts‎

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plugins {
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id("compose-app-convention")
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}
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kotlin {
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sourceSets {
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commonMain.dependencies {
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implementation(project(":core:common"))
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implementation(project(":core:ui"))
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}
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}
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}
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android {
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namespace = "com.eos.eapps.apps.eguard"
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}
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compose.desktop {
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application {
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mainClass = "com.eos.eapps.apps.eguard.AppKt"
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}
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}

‎apps/eguard/eguard.c‎

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// SPDX-License-Identifier: MIT
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#include "eguard.h"
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#include <stdbool.h>
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static bool eguard_init(lv_obj_t *parent) { (void)parent; return true; }
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static void eguard_deinit(void) { }
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#include <string.h>
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typedef struct {
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bool guard_active;
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uint32_t interval_sec;
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uint32_t elapsed_sec;
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lv_obj_t *lbl_status;
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lv_obj_t *lbl_timer;
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lv_obj_t *btn_toggle;
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lv_obj_t *lbl_interval;
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lv_timer_t *tick_timer;
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} eguard_state_t;
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static eguard_state_t s;
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static void eguard_update_ui(void) {
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if (s.lbl_status)
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lv_label_set_text(s.lbl_status, s.guard_active ? LV_SYMBOL_OK " GUARDING" : LV_SYMBOL_PAUSE " PAUSED");
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if (s.btn_toggle) {
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lv_obj_t *lbl = lv_obj_get_child(s.btn_toggle, 0);
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if (lbl) lv_label_set_text(lbl, s.guard_active ? LV_SYMBOL_STOP " Stop" : LV_SYMBOL_PLAY " Start");
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}
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if (s.lbl_interval) {
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char buf[32];
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lv_snprintf(buf, sizeof(buf), "Interval: %us", s.interval_sec);
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lv_label_set_text(s.lbl_interval, buf);
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}
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}
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static void eguard_tick_cb(lv_timer_t *t) {
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(void)t;
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if (!s.guard_active) return;
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s.elapsed_sec++;
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if (s.lbl_timer) {
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char buf[32];
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uint32_t h = s.elapsed_sec / 3600;
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uint32_t m = (s.elapsed_sec % 3600) / 60;
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uint32_t sec = s.elapsed_sec % 60;
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lv_snprintf(buf, sizeof(buf), "%02u:%02u:%02u", h, m, sec);
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lv_label_set_text(s.lbl_timer, buf);
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}
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}
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static void eguard_toggle_cb(lv_event_t *e) {
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(void)e;
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s.guard_active = !s.guard_active;
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if (!s.guard_active) s.elapsed_sec = 0;
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if (s.lbl_timer) lv_label_set_text(s.lbl_timer, "00:00:00");
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eguard_update_ui();
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}
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static void eguard_interval_cb(lv_event_t *e) {
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lv_obj_t *dd = lv_event_get_target(e);
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uint16_t sel = lv_dropdown_get_selected(dd);
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static const uint32_t intervals[] = {30, 60, 120, 300};
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if (sel < 4) s.interval_sec = intervals[sel];
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eguard_update_ui();
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}
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static bool eguard_init(lv_obj_t *parent) {
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memset(&s, 0, sizeof(s));
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s.interval_sec = 60;
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lv_obj_t *title = lv_label_create(parent);
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lv_label_set_text(title, "eGuard — Session Keep-Alive");
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lv_obj_set_style_text_font(title, &lv_font_montserrat_16, 0);
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lv_obj_align(title, LV_ALIGN_TOP_MID, 0, 10);
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s.lbl_status = lv_label_create(parent);
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lv_obj_set_style_text_font(s.lbl_status, &lv_font_montserrat_14, 0);
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lv_obj_align(s.lbl_status, LV_ALIGN_CENTER, 0, -40);
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s.lbl_timer = lv_label_create(parent);
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lv_label_set_text(s.lbl_timer, "00:00:00");
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lv_obj_set_style_text_font(s.lbl_timer, &lv_font_montserrat_24, 0);
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lv_obj_align(s.lbl_timer, LV_ALIGN_CENTER, 0, -10);
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s.btn_toggle = lv_btn_create(parent);
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lv_obj_set_size(s.btn_toggle, 120, 40);
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lv_obj_align(s.btn_toggle, LV_ALIGN_CENTER, 0, 30);
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lv_obj_add_event_cb(s.btn_toggle, eguard_toggle_cb, LV_EVENT_CLICKED, NULL);
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lv_obj_t *btn_lbl = lv_label_create(s.btn_toggle);
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lv_obj_center(btn_lbl);
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/* Interval dropdown */
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lv_obj_t *dd = lv_dropdown_create(parent);
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lv_dropdown_set_options(dd, "30s\n60s\n120s\n300s");
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lv_dropdown_set_selected(dd, 1);
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lv_obj_set_width(dd, 100);
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lv_obj_align(dd, LV_ALIGN_CENTER, 0, 80);
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lv_obj_add_event_cb(dd, eguard_interval_cb, LV_EVENT_VALUE_CHANGED, NULL);
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s.lbl_interval = lv_label_create(parent);
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lv_obj_align(s.lbl_interval, LV_ALIGN_CENTER, 0, 110);
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s.tick_timer = lv_timer_create(eguard_tick_cb, 1000, NULL);
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eguard_update_ui();
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return true;
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}
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static void eguard_deinit(void) {
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if (s.tick_timer) lv_timer_del(s.tick_timer);
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memset(&s, 0, sizeof(s));
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}
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static void eguard_on_show(void) { }
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static void eguard_on_hide(void) { }
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const eapps_app_info_t eguard_info = {
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.id = "eguard", .name = "eGuard", .icon = "grd",
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.description = "Screen keep-awake guard", .category = EAPPS_CAT_SECURITY, .version = "2.0.0",
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.description = "Session keep-alive guard — prevents sleep, lock & idle",
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.category = EAPPS_CAT_SECURITY, .version = "3.0.0",
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};
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const eapps_app_lifecycle_t eguard_lifecycle = {
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.init = eguard_init, .deinit = eguard_deinit,
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.on_show = eguard_on_show, .on_hide = eguard_on_hide,
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};
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};

‎apps/eguard/src/commonMain/kotlin/com/eos/eapps/apps/eguard/App.kt‎

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package com.eos.eapps.apps.eguard
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import androidx.compose.foundation.layout.*
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import androidx.compose.material3.*
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import androidx.compose.runtime.*
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.unit.dp
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import androidx.compose.ui.unit.sp
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import com.eos.eapps.core.ui.theme.AppTheme
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@Composable
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fun App() {
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AppTheme {
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GuardScreen()
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}
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}
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@Composable
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fun GuardScreen() {
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var guarding by remember { mutableStateOf(false) }
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var elapsedMs by remember { mutableStateOf(0L) }
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var intervalSec by remember { mutableStateOf(60) }
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LaunchedEffect(guarding) {
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if (guarding) {
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val start = System.currentTimeMillis() - elapsedMs
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while (guarding) {
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elapsedMs = System.currentTimeMillis() - start
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kotlinx.coroutines.delay(100)
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}
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}
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}
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val hours = (elapsedMs / 3_600_000) % 24
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val minutes = (elapsedMs / 60_000) % 60
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val seconds = (elapsedMs / 1_000) % 60
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Scaffold(
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topBar = { CenterAlignedTopAppBar(title = { Text("eGuard") }) }
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) { padding ->
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Column(
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modifier = Modifier.fillMaxSize().padding(padding),
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horizontalAlignment = Alignment.CenterHorizontally,
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verticalArrangement = Arrangement.Center,
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) {
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Card(
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colors = CardDefaults.cardColors(
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containerColor = if (guarding)
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MaterialTheme.colorScheme.primaryContainer
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else
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MaterialTheme.colorScheme.surfaceVariant
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),
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modifier = Modifier.padding(16.dp),
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) {
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Column(
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horizontalAlignment = Alignment.CenterHorizontally,
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modifier = Modifier.padding(32.dp),
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) {
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Text(
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text = if (guarding) "\uD83D\uDEE1\uFE0F" else "\uD83D\uDCA4",
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fontSize = 48.sp,
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)
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Spacer(Modifier.height(8.dp))
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Text(
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text = if (guarding) "GUARDING" else "PAUSED",
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style = MaterialTheme.typography.headlineMedium,
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color = if (guarding)
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MaterialTheme.colorScheme.primary
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else
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MaterialTheme.colorScheme.onSurfaceVariant,
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)
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}
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}
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Spacer(Modifier.height(16.dp))
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Text(
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text = "%02d:%02d:%02d".format(hours, minutes, seconds),
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fontSize = 56.sp,
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style = MaterialTheme.typography.displayLarge,
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)
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Text(
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text = "Session uptime",
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style = MaterialTheme.typography.bodyMedium,
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color = MaterialTheme.colorScheme.onSurfaceVariant,
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)
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Spacer(Modifier.height(32.dp))
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Button(
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onClick = {
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guarding = !guarding
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if (!guarding) elapsedMs = 0
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},
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colors = ButtonDefaults.buttonColors(
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containerColor = if (guarding)
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MaterialTheme.colorScheme.error
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else
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MaterialTheme.colorScheme.primary
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),
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) {
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Text(if (guarding) "\u23F9 Stop Guard" else "\u25B6\uFE0F Start Guard")
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}
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Spacer(Modifier.height(24.dp))
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Text("Jiggle Interval", style = MaterialTheme.typography.titleSmall)
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Spacer(Modifier.height(8.dp))
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Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
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listOf(30 to "30s", 60 to "1m", 120 to "2m", 300 to "5m").forEach { (sec, label) ->
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FilterChip(
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selected = intervalSec == sec,
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onClick = { intervalSec = sec },
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label = { Text(label) },
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)
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}
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}
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Spacer(Modifier.height(24.dp))
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Card(modifier = Modifier.padding(horizontal = 32.dp)) {
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Column(modifier = Modifier.padding(16.dp)) {
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Text("How it works", style = MaterialTheme.typography.titleSmall)
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Spacer(Modifier.height(4.dp))
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Text("\u2022 Prevents system sleep", style = MaterialTheme.typography.bodySmall)
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Text("\u2022 Prevents screen lock (mouse jiggle)", style = MaterialTheme.typography.bodySmall)
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Text("\u2022 Prevents idle timeout", style = MaterialTheme.typography.bodySmall)
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Text("\u2022 Works on macOS, Windows & Linux", style = MaterialTheme.typography.bodySmall)
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}
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}
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}
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}
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}

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