refactor: Enhance stall and product loading logic in useMarket composable

- Update the loadStalls and loadProducts functions to filter events based on the active market's merchants instead of fetching from all authors.
- Improve logging to provide clearer insights into the loading process and the merchants involved.
- Add checks to handle cases where no active market or merchants are found, preventing unnecessary API calls.

src/composables/useMarket.ts

@@ -69,7 +69,7 @@ export function useMarket() {
       
       // Load stalls for this market
       console.log('Loading stalls...')
-      await loadStalls(marketData.pubkey)
+      await loadStalls()
       console.log('Stalls loaded')
       
       // Load products for all stalls
@@ -166,16 +166,29 @@ export function useMarket() {
     }
   }
   
-  const loadStalls = async (marketPubkey: string) => {
+  const loadStalls = async () => {
     try {
       const client = nostrStore.getClient()
       
-      console.log('Loading all stalls from all authors')
+      // Get the active market to filter by its merchants
+      const activeMarket = marketStore.activeMarket
+      if (!activeMarket) {
+        console.warn('No active market found')
+        return
+      }
       
-      // Fetch all stall events from all authors
+      const merchants = [...(activeMarket.opts.merchants || [])]
-      // We'll filter by market membership in the application logic
+      console.log('Loading stalls from market merchants:', merchants)
+      
+      if (merchants.length === 0) {
+        console.log('No merchants in market, skipping stall loading')
+        return
+      }
+      
+      // Fetch stall events from market merchants only
       const events = await client.fetchEvents({
-        kinds: [MARKET_EVENT_KINDS.STALL]
+        kinds: [MARKET_EVENT_KINDS.STALL],
+        authors: merchants
       })
       
       console.log('Found stall events:', events.length)
@@ -235,13 +248,28 @@ export function useMarket() {
     try {
       const client = nostrStore.getClient()
       
-      // Fetch all product events from all authors
+      // Get the active market to filter by its merchants
-      // We'll filter by stall membership in the application logic
+      const activeMarket = marketStore.activeMarket
+      if (!activeMarket) {
+        console.warn('No active market found')
+        return
+      }
+      
+      const merchants = [...(activeMarket.opts.merchants || [])]
+      console.log('Loading products from market merchants:', merchants)
+      
+      if (merchants.length === 0) {
+        console.log('No merchants in market, skipping product loading')
+        return
+      }
+      
+      // Fetch product events from market merchants only
       const events = await client.fetchEvents({
-        kinds: [MARKET_EVENT_KINDS.PRODUCT]
+        kinds: [MARKET_EVENT_KINDS.PRODUCT],
+        authors: merchants
       })
       
-      console.log('Found product events from all authors:', events.length)
+      console.log('Found product events from market merchants:', events.length)
       
       // Group events by product ID and keep only the most recent version
       const productGroups = new Map<string, any[]>()
@@ -370,10 +398,26 @@ export function useMarket() {
     try {
       const client = nostrStore.getClient()
       
-      // Subscribe to real-time market updates
+      // Get the active market to filter by its merchants
+      const activeMarket = marketStore.activeMarket
+      if (!activeMarket) {
+        console.warn('No active market found for subscription')
+        return () => {}
+      }
+      
+      const merchants = [...(activeMarket.opts.merchants || [])]
+      if (merchants.length === 0) {
+        console.log('No merchants in market, skipping subscription')
+        return () => {}
+      }
+      
+      console.log('Subscribing to updates from market merchants:', merchants)
+      
+      // Subscribe to real-time market updates from market merchants only
       const filters = [
         {
           kinds: [MARKET_EVENT_KINDS.STALL, MARKET_EVENT_KINDS.PRODUCT],
+          authors: merchants,
           since: Math.floor(Date.now() / 1000)
         }
       ]