hecha functionalidad para seguir usuarios desde los posts

src/lib/stores/cacheSeguidos.svelte.js

@@ -0,0 +1,105 @@
+import { browser } from '$app/environment';
+import { writable } from 'svelte/store';
+
+class FollowCache {
+	constructor() {
+		if (browser) {
+			this.loadFromStorage();
+		}
+	}
+
+	/** @type {Map<string, boolean>} */
+	#cache = new Map();
+
+	/** @type {import('svelte/store').Writable<Map<string, boolean>>} */
+	store = writable(this.#cache);
+
+	/**
+	 * @param {string} userId
+	 * @returns {boolean | undefined}
+	 */
+	get(userId) {
+		return this.#cache.get(userId);
+	}
+
+	/**
+	 * @param {string} userId
+	 * @param {boolean} isFollowed
+	 */
+	set(userId, isFollowed) {
+		this.#cache.set(userId, isFollowed);
+		this.store.set(this.#cache);
+		this.saveToStorage();
+
+		if (browser) {
+			window.dispatchEvent(
+				new CustomEvent('followCacheUpdated', {
+					detail: { userId, isFollowed }
+				})
+			);
+		}
+	}
+
+	/**
+	 * @param {string} userId
+	 * @returns {boolean}
+	 */
+	has(userId) {
+		return this.#cache.has(userId);
+	}
+
+	/**
+	 * @param {string} userId
+	 */
+	delete(userId) {
+		this.#cache.delete(userId);
+		this.store.set(this.#cache);
+		this.saveToStorage();
+
+		if (browser) {
+			window.dispatchEvent(
+				new CustomEvent('followCacheUpdated', {
+					detail: { userId, isFollowed: false }
+				})
+			);
+		}
+	}
+
+	clear() {
+		this.#cache.clear();
+		this.store.set(this.#cache);
+		this.saveToStorage();
+
+		if (browser) {
+			window.dispatchEvent(
+				new CustomEvent('followCacheUpdated', {
+					detail: { clearAll: true }
+				})
+			);
+		}
+	}
+
+	saveToStorage() {
+		if (browser) {
+			const data = Object.fromEntries(this.#cache);
+			sessionStorage.setItem('follow-cache', JSON.stringify(data));
+		}
+	}
+
+	loadFromStorage() {
+		if (browser) {
+			try {
+				const stored = sessionStorage.getItem('follow-cache');
+				if (stored) {
+					const data = JSON.parse(stored);
+					this.#cache = new Map(Object.entries(data));
+					this.store.set(this.#cache);
+				}
+			} catch (error) {
+				console.error('Error cargando desde sesion:', error);
+			}
+		}
+	}
+}
+
+export const cacheSeguidos = new FollowCache();