add ParamToInt method

service_a/internal/domains/handlers.go

@@ -3,6 +3,7 @@ package domains
 import (
 	"encoding/json"
 	"net/http"
+	"strconv"
 )
 
 type (
@@ -14,3 +15,22 @@ func (bh *BaseHandler) ToJSON(w http.ResponseWriter, statusCode int, data any) {
 	w.WriteHeader(statusCode)
 	json.NewEncoder(w).Encode(data)
 }
+
+func (bh *BaseHandler) ParamToInt(param string, defaultValue ...int) int {
+	if param == "" {
+		if len(defaultValue) > 0 {
+			return defaultValue[0]
+		}
+		return 0
+	}
+
+	value, err := strconv.Atoi(param)
+	if err != nil {
+		if len(defaultValue) > 0 {
+			return defaultValue[0]
+		}
+		return 0
+	}
+
+	return value
+}

service_a/internal/domains/meteo/handlers.go

@@ -10,7 +10,6 @@ import (
 	"net/http"
 	"servicea/internal/app"
 	"servicea/internal/domains"
-	"strconv"
 	"time"
 )
 
@@ -80,34 +79,13 @@ func (h *Handler) IngestExcel(w http.ResponseWriter, r *http.Request) {
 
 func (h *Handler) GetMeteoData(w http.ResponseWriter, r *http.Request) {
 	queryParams := r.URL.Query()
-	pageInt := int(1)
-	limitInt := int(10)
-
-	page := queryParams.Get("page")
-	limit := queryParams.Get("limit")
-
-	if page != "" {
-		p, err := strconv.Atoi(page)
-		if err == nil {
-			pageInt = p
-		}
-	}
-
-	if limit != "" {
-		l, err := strconv.Atoi(limit)
-		if err == nil {
-			limitInt = l
-		} else {
-			limitInt = 10
-		}
-	}
 
 	params := GetMeteoData{
 		Location: queryParams.Get("city"),
 		From:     queryParams.Get("from"),
 		To:       queryParams.Get("to"),
-		Page:     pageInt,
+		Page:     h.ParamToInt(queryParams.Get("page"), 1),
-		Limit:    limitInt,
+		Limit:    h.ParamToInt(queryParams.Get("limit"), 10),
 	}
 
 	if err := params.Validate(); err != nil {