Refactor: create DateCacheService to reduce date duplication

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

src/app/services/date-cache.service.ts

@@ -0,0 +1,105 @@
+import { Injectable } from '@angular/core';
+
+/**
+ * Service to cache and provide commonly used date values.
+ * This reduces redundant Date object creation across the application.
+ */
+@Injectable({
+	providedIn: 'root',
+})
+export class DateCacheService {
+	private _today: Date | null = null;
+	private _todayComponents: { date: number; month: number; year: number } | null = null;
+	private _currentMonth: number | null = null;
+	private _currentYear: number | null = null;
+
+	/**
+	 * Get today's date (time set to 00:00:00.000)
+	 */
+	getToday(): Date {
+		if (!this._today || this.isNewDay(this._today)) {
+			this._today = new Date();
+			this._today.setHours(0, 0, 0, 0);
+			this._todayComponents = null; // Invalidate components cache
+		}
+		return this._today;
+	}
+
+	/**
+	 * Get today's date components (date, month, year) for efficient comparison
+	 */
+	getTodayComponents(): { date: number; month: number; year: number } {
+		if (!this._todayComponents || (this._today && this.isNewDay(this._today))) {
+			const today = this.getToday();
+			this._todayComponents = {
+				date: today.getDate(),
+				month: today.getMonth(),
+				year: today.getFullYear(),
+			};
+		}
+		return this._todayComponents;
+	}
+
+	/**
+	 * Get current month (0-11)
+	 */
+	getCurrentMonth(): number {
+		if (this._currentMonth === null || this.isNewMonth()) {
+			this._currentMonth = new Date().getMonth();
+		}
+		return this._currentMonth;
+	}
+
+	/**
+	 * Get current year
+	 */
+	getCurrentYear(): number {
+		if (this._currentYear === null || this.isNewYear()) {
+			this._currentYear = new Date().getFullYear();
+		}
+		return this._currentYear;
+	}
+
+	/**
+	 * Get current date with time set to 00:00:00.000 (alias for getToday)
+	 */
+	getNow(): Date {
+		return this.getToday();
+	}
+
+	/**
+	 * Check if a cached date is from a previous day
+	 */
+	private isNewDay(cachedDate: Date): boolean {
+		const now = new Date();
+		return (
+			cachedDate.getDate() !== now.getDate() ||
+			cachedDate.getMonth() !== now.getMonth() ||
+			cachedDate.getFullYear() !== now.getFullYear()
+		);
+	}
+
+	/**
+	 * Check if we're in a new month
+	 */
+	private isNewMonth(): boolean {
+		return this._currentMonth !== null && this._currentMonth !== new Date().getMonth();
+	}
+
+	/**
+	 * Check if we're in a new year
+	 */
+	private isNewYear(): boolean {
+		return this._currentYear !== null && this._currentYear !== new Date().getFullYear();
+	}
+
+	/**
+	 * Clear all caches (useful for testing)
+	 */
+	clearCache(): void {
+		this._today = null;
+		this._todayComponents = null;
+		this._currentMonth = null;
+		this._currentYear = null;
+	}
+}