try to abstract matcher

cmd/cli/main.go

@@ -411,8 +411,14 @@ func newViewItemsParamsKnownValues() *cli.Command {
 
 func newViewItemsCountCmd() *cli.Command {
 	return &cli.Command{
-		Name:   "count",
+		Name:  "count",
-		Usage:  "iterates over collection and counts number of items",
+		Usage: "iterates over collection and counts number of items",
+		Flags: []cli.Flag{
+			&cli.StringSliceFlag{
+				Name:  "param-key-match",
+				Usage: "filters by parameters with AND logic",
+			},
+		},
 		Action: decorateAction(viewItemsCountAction),
 	}
 }
@@ -649,36 +655,47 @@ func viewItemsCountAction(ctx context.Context, c *cli.Command) error {
 		return fmt.Errorf("getting repository: %w", err)
 	}
 
-	itemChan, err := r.GoodsItem().ListIter(ctx, 10)
+	filters := c.StringSlice("param-key-match")
-	if err != nil {
+	m := matcher.NewRadix()
-		if !errors.Is(err, entity.ErrNotImplemented) {
+	patternMapped := make(map[string]struct{}, len(filters))
-			return fmt.Errorf("getting list iter: %w", err)
+	if len(filters) == 0 {
+		m.Register("*")
+	} else {
+		for _, f := range filters {
+			m.Register(f)
+		}
+		for _, pattern := range m.Patterns() {
+			patternMapped[pattern] = struct{}{}
 		}
 	}
 
 	var count int
-	if err == nil {
+	items, err := r.GoodsItem().List(ctx)
-		var done bool
+	if err != nil {
-		for !done {
+		return fmt.Errorf("getting items: %w", err)
-			select {
+	}
-			case _, ok := <-itemChan:
+	for _, item := range items {
-				if !ok {
+		seenPatterns := map[string]struct{}{}
-					done = true
+
-					continue
+		for k := range item.Parameters {
-				}
+			pattern := m.MatchByPattern(k)
-				count++
+			if pattern == "" {
-			case <-ctx.Done():
+				continue
-				return ctx.Err()
 			}
+			if _, ok := seenPatterns[pattern]; ok {
+				continue
+			}
+			seenPatterns[pattern] = struct{}{}
+		}
+
+		if len(seenPatterns) == len(patternMapped) {
+			println("Item matched", item.Articul, item.Cart)
+			count++
 		}
 	}
 
-	items, err := r.GoodsItem().List(ctx)
+	println(count)
-	if err != nil {
-		return fmt.Errorf("getting list: %w", err)
-	}
 
-	zerolog.Ctx(ctx).Info().Int("count", count).Int("list_count", len(items)).Msg("read all items")
 	return nil
 }
 

internal/matcher/matcher.go

@@ -0,0 +1,13 @@
+package matcher
+
+type Unit interface {
+	MatchByPattern(value string) (pattern string)
+	Match(value string) bool
+
+	// Move this to init stage because some of matchers
+	// might not be applicable to it
+	RegisterRegexp(regexpPattern string)
+	Register(pattern string)
+
+	Patterns() []string
+}