Add dashboard time visibility condition

src/common/condition/extract.ts

@@ -0,0 +1,36 @@
+import type {
+  Condition,
+  TimeCondition,
+} from "../../panels/lovelace/common/validate-condition";
+
+/**
+ * Extract media queries from conditions recursively
+ */
+export function extractMediaQueries(conditions: Condition[]): string[] {
+  return conditions.reduce<string[]>((array, c) => {
+    if ("conditions" in c && c.conditions) {
+      array.push(...extractMediaQueries(c.conditions));
+    }
+    if (c.condition === "screen" && c.media_query) {
+      array.push(c.media_query);
+    }
+    return array;
+  }, []);
+}
+
+/**
+ * Extract time conditions from conditions recursively
+ */
+export function extractTimeConditions(
+  conditions: Condition[]
+): TimeCondition[] {
+  return conditions.reduce<TimeCondition[]>((array, c) => {
+    if ("conditions" in c && c.conditions) {
+      array.push(...extractTimeConditions(c.conditions));
+    }
+    if (c.condition === "time") {
+      array.push(c);
+    }
+    return array;
+  }, []);
+}

src/common/condition/listeners.ts

@@ -0,0 +1,72 @@
+import { listenMediaQuery } from "../dom/media_query";
+import type { HomeAssistant } from "../../types";
+import type { Condition } from "../../panels/lovelace/common/validate-condition";
+import { checkConditionsMet } from "../../panels/lovelace/common/validate-condition";
+import { extractMediaQueries, extractTimeConditions } from "./extract";
+import { calculateNextTimeUpdate } from "./time-calculator";
+
+/**
+ * Helper to setup media query listeners for conditional visibility
+ */
+export function setupMediaQueryListeners(
+  conditions: Condition[],
+  hass: HomeAssistant,
+  addListener: (unsub: () => void) => void,
+  onUpdate: (conditionsMet: boolean) => void
+): void {
+  const mediaQueries = extractMediaQueries(conditions);
+
+  if (mediaQueries.length === 0) return;
+
+  // Optimization for single media query
+  const hasOnlyMediaQuery =
+    conditions.length === 1 &&
+    conditions[0].condition === "screen" &&
+    !!conditions[0].media_query;
+
+  mediaQueries.forEach((mediaQuery) => {
+    const unsub = listenMediaQuery(mediaQuery, (matches) => {
+      if (hasOnlyMediaQuery) {
+        onUpdate(matches);
+      } else {
+        const conditionsMet = checkConditionsMet(conditions, hass);
+        onUpdate(conditionsMet);
+      }
+    });
+    addListener(unsub);
+  });
+}
+
+/**
+ * Helper to setup time-based listeners for conditional visibility
+ */
+export function setupTimeListeners(
+  conditions: Condition[],
+  hass: HomeAssistant,
+  addListener: (unsub: () => void) => void,
+  onUpdate: (conditionsMet: boolean) => void
+): void {
+  const timeConditions = extractTimeConditions(conditions);
+
+  if (timeConditions.length === 0) return;
+
+  timeConditions.forEach((timeCondition) => {
+    const scheduleUpdate = () => {
+      const delay = calculateNextTimeUpdate(hass, timeCondition);
+
+      if (delay === undefined) return;
+
+      const timeoutId = setTimeout(() => {
+        const conditionsMet = checkConditionsMet(conditions, hass);
+        onUpdate(conditionsMet);
+        // Reschedule for next boundary
+        scheduleUpdate();
+      }, delay);
+
+      // Store cleanup function
+      addListener(() => clearTimeout(timeoutId));
+    };
+
+    scheduleUpdate();
+  });
+}

src/common/condition/time-calculator.ts

@@ -0,0 +1,73 @@
+import { TZDate } from "@date-fns/tz";
+import {
+  startOfDay,
+  addDays,
+  addMinutes,
+  differenceInMilliseconds,
+} from "date-fns";
+import type { HomeAssistant } from "../../types";
+import { TimeZone } from "../../data/translation";
+import { parseTimeString } from "../datetime/check_time";
+import type { TimeCondition } from "../../panels/lovelace/common/validate-condition";
+
+/**
+ * Calculate milliseconds until next time boundary for a time condition
+ * @param hass Home Assistant object
+ * @param timeCondition Time condition to calculate next update for
+ * @returns Milliseconds until next boundary, or undefined if no boundaries
+ */
+export function calculateNextTimeUpdate(
+  hass: HomeAssistant,
+  { after, before, weekdays }: Omit<TimeCondition, "condition">
+): number | undefined {
+  const timezone =
+    hass.locale.time_zone === TimeZone.server
+      ? hass.config.time_zone
+      : Intl.DateTimeFormat().resolvedOptions().timeZone;
+
+  const now = new TZDate(new Date(), timezone);
+  const updates: Date[] = [];
+
+  // Calculate next occurrence of after time
+  if (after) {
+    let afterDate = parseTimeString(after, timezone);
+    if (afterDate <= now) {
+      // If time has passed today, schedule for tomorrow
+      afterDate = addDays(afterDate, 1);
+    }
+    updates.push(afterDate);
+  }
+
+  // Calculate next occurrence of before time
+  if (before) {
+    let beforeDate = parseTimeString(before, timezone);
+    if (beforeDate <= now) {
+      // If time has passed today, schedule for tomorrow
+      beforeDate = addDays(beforeDate, 1);
+    }
+    updates.push(beforeDate);
+  }
+
+  // If weekdays are specified, check for midnight (weekday transition)
+  if (weekdays && weekdays.length > 0 && weekdays.length < 7) {
+    // Calculate next midnight using startOfDay + addDays
+    const tomorrow = addDays(now, 1);
+    const midnight = startOfDay(tomorrow);
+    updates.push(midnight);
+  }
+
+  if (updates.length === 0) {
+    return undefined;
+  }
+
+  // Find the soonest update time
+  const nextUpdate = updates.reduce((soonest, current) =>
+    current < soonest ? current : soonest
+  );
+
+  // Add 1 minute buffer to ensure we're past the boundary
+  const updateWithBuffer = addMinutes(nextUpdate, 1);
+
+  // Calculate difference in milliseconds
+  return differenceInMilliseconds(updateWithBuffer, now);
+}

src/common/datetime/check_time.ts

@@ -0,0 +1,107 @@
+import { TZDate } from "@date-fns/tz";
+import { isBefore, isAfter, isWithinInterval } from "date-fns";
+import type { HomeAssistant } from "../../types";
+import { TimeZone } from "../../data/translation";
+import { WEEKDAY_MAP } from "./weekday";
+import type { TimeCondition } from "../../panels/lovelace/common/validate-condition";
+
+/**
+ * Parse a time string (HH:MM or HH:MM:SS) and set it on today's date in the given timezone
+ * @param timeString The time string to parse
+ * @param timezone The timezone to use
+ * @returns The Date object
+ */
+export const parseTimeString = (timeString: string, timezone: string): Date => {
+  const parts = timeString.split(":");
+
+  if (parts.length < 2 || parts.length > 3) {
+    throw new Error(
+      `Invalid time format: ${timeString}. Expected HH:MM or HH:MM:SS`
+    );
+  }
+
+  const hours = parseInt(parts[0], 10);
+  const minutes = parseInt(parts[1], 10);
+  const seconds = parts.length === 3 ? parseInt(parts[2], 10) : 0;
+
+  if (isNaN(hours) || isNaN(minutes) || isNaN(seconds)) {
+    throw new Error(`Invalid time values in: ${timeString}`);
+  }
+
+  // Add range validation
+  if (hours < 0 || hours > 23) {
+    throw new Error(`Invalid hours in: ${timeString}. Must be 0-23`);
+  }
+  if (minutes < 0 || minutes > 59) {
+    throw new Error(`Invalid minutes in: ${timeString}. Must be 0-59`);
+  }
+  if (seconds < 0 || seconds > 59) {
+    throw new Error(`Invalid seconds in: ${timeString}. Must be 0-59`);
+  }
+
+  const now = new TZDate(new Date(), timezone);
+  const dateWithTime = new TZDate(
+    now.getFullYear(),
+    now.getMonth(),
+    now.getDate(),
+    hours,
+    minutes,
+    seconds,
+    0,
+    timezone
+  );
+
+  return new Date(dateWithTime.getTime());
+};
+
+/**
+ * Check if the current time matches the time condition (after/before/weekday)
+ * @param hass Home Assistant object
+ * @param timeCondition Time condition to check
+ * @returns true if current time matches the condition
+ */
+export const checkTimeInRange = (
+  hass: HomeAssistant,
+  { after, before, weekdays }: Omit<TimeCondition, "condition">
+): boolean => {
+  const timezone =
+    hass.locale.time_zone === TimeZone.server
+      ? hass.config.time_zone
+      : Intl.DateTimeFormat().resolvedOptions().timeZone;
+
+  const now = new TZDate(new Date(), timezone);
+
+  // Check weekday condition
+  if (weekdays && weekdays.length > 0) {
+    const currentWeekday = WEEKDAY_MAP[now.getDay()];
+    if (!weekdays.includes(currentWeekday)) {
+      return false;
+    }
+  }
+
+  // Check time conditions
+  if (!after && !before) {
+    return true;
+  }
+
+  const afterDate = after ? parseTimeString(after, timezone) : undefined;
+  const beforeDate = before ? parseTimeString(before, timezone) : undefined;
+
+  if (afterDate && beforeDate) {
+    if (isBefore(beforeDate, afterDate)) {
+      // Crosses midnight (e.g., 22:00 to 06:00)
+      return isAfter(now, afterDate) || isBefore(now, beforeDate);
+    }
+    return isWithinInterval(now, { start: afterDate, end: beforeDate });
+  }
+
+  if (afterDate) {
+    return !isBefore(now, afterDate);
+  }
+
+  if (beforeDate) {
+    return !isAfter(now, beforeDate);
+  }
+
+  return true;
+};

src/common/datetime/first_weekday.ts

@@ -1,18 +1,7 @@
 import { getWeekStartByLocale } from "weekstart";
 import type { FrontendLocaleData } from "../../data/translation";
 import { FirstWeekday } from "../../data/translation";
-
-export const weekdays = [
-  "sunday",
-  "monday",
-  "tuesday",
-  "wednesday",
-  "thursday",
-  "friday",
-  "saturday",
-] as const;
-
-type WeekdayIndex = 0 | 1 | 2 | 3 | 4 | 5 | 6;
+import { WEEKDAYS_LONG, type WeekdayIndex } from "./weekday";
 
 export const firstWeekdayIndex = (locale: FrontendLocaleData): WeekdayIndex => {
   if (locale.first_weekday === FirstWeekday.language) {
@@ -23,12 +12,12 @@ export const firstWeekdayIndex = (locale: FrontendLocaleData): WeekdayIndex => {
     }
     return (getWeekStartByLocale(locale.language) % 7) as WeekdayIndex;
   }
-  return weekdays.includes(locale.first_weekday)
-    ? (weekdays.indexOf(locale.first_weekday) as WeekdayIndex)
+  return WEEKDAYS_LONG.includes(locale.first_weekday)
+    ? (WEEKDAYS_LONG.indexOf(locale.first_weekday) as WeekdayIndex)
     : 1;
 };
 
 export const firstWeekday = (locale: FrontendLocaleData) => {
   const index = firstWeekdayIndex(locale);
-  return weekdays[index];
+  return WEEKDAYS_LONG[index];
 };

src/common/datetime/weekday.ts

@@ -0,0 +1,59 @@
+export type WeekdayIndex = 0 | 1 | 2 | 3 | 4 | 5 | 6;
+
+export type WeekdayShort =
+  | "sun"
+  | "mon"
+  | "tue"
+  | "wed"
+  | "thu"
+  | "fri"
+  | "sat";
+
+export type WeekdayLong =
+  | "sunday"
+  | "monday"
+  | "tuesday"
+  | "wednesday"
+  | "thursday"
+  | "friday"
+  | "saturday";
+
+export const WEEKDAYS_SHORT = [
+  "sun",
+  "mon",
+  "tue",
+  "wed",
+  "thu",
+  "fri",
+  "sat",
+] as const satisfies readonly WeekdayShort[];
+
+export const WEEKDAYS_LONG = [
+  "sunday",
+  "monday",
+  "tuesday",
+  "wednesday",
+  "thursday",
+  "friday",
+  "saturday",
+] as const satisfies readonly WeekdayLong[];
+
+export const WEEKDAY_MAP = {
+  0: "sun",
+  1: "mon",
+  2: "tue",
+  3: "wed",
+  4: "thu",
+  5: "fri",
+  6: "sat",
+} as const satisfies Record<WeekdayIndex, WeekdayShort>;
+
+export const WEEKDAY_SHORT_TO_LONG = {
+  sun: "sunday",
+  mon: "monday",
+  tue: "tuesday",
+  wed: "wednesday",
+  thu: "thursday",
+  fri: "friday",
+  sat: "saturday",
+} as const satisfies Record<WeekdayShort, WeekdayLong>;