Improve FindItems function with better error handling and logging

internal/db/db.go

@@ -2,7 +2,9 @@ package db
 
 import (
 	"encoding/json"
+	"fmt"
 	"log"
+	"os"
 	"ssender/internal/models"
 
 	"github.com/boltdb/bolt"
@@ -41,33 +43,39 @@ func InitDb(rss models.Rss2, dbpath string) error {
 
 func FindItems(rss models.Rss2, dbpath string) (*models.SendItems, error) {
 	var sendItems models.SendItems
-	db, err := bolt.Open(dbpath, 0600, nil)
+	
+	// Check if DB file exists
+	if _, err := os.Stat(dbpath); os.IsNotExist(err) {
+		return nil, fmt.Errorf("database file does not exist: %s", dbpath)
+	}
+	
+	// Open database
+	db, err := openDB(dbpath)
 	if err != nil {
 		return nil, err
 	}
 	defer db.Close()
 
-	for _, v := range rss.ItemList {
+	log.Println("Finding new items in DB")
+	
 	err = db.View(func(tx *bolt.Tx) error {
-			// Assume bucket exists and has keys
 		b := tx.Bucket([]byte("rss"))
-			c := b.Cursor()
+		if b == nil {
-			flag := false
+			return fmt.Errorf("bucket 'rss' not found in database")
-			for key, _ := c.First(); key != nil; key, _ = c.Next() {
-				if v.Link == string(key) {
-					flag = true
-					break
 		}
-			}
+		for _, v := range rss.ItemList {
-			if flag {
+			if b.Get([]byte(v.Link)) != nil {
 				sendItems.ItemList = append(sendItems.ItemList, v)
 			}
+		}
 		return nil
 	})
 	if err != nil {
 		return nil, err
 	}
-	}
+	
+	log.Printf("Found %d new items", len(sendItems.ItemList))
+	
 	return &sendItems, nil
 }