feat: improve layanan search and pagination

internal/http/layanan.go

@@ -3,11 +3,15 @@ package http
 import (
 	"net/http"
 	"strconv"
+	"strings"
 
 	"primaya-api/cpone-middleware/internal/repository"
 )
 
-const layananPerPage = 15
+const (
+	defaultLayananPerPage = 15
+	maxLayananPerPage     = 1000
+)
 
 type LayananPaginationResponse struct {
 	CurrentPage  int                            `json:"current_page"`
@@ -24,8 +28,11 @@ type LayananPaginationResponse struct {
 
 func (h Handler) ListLayanan(w http.ResponseWriter, r *http.Request) {
 	pageNumber := layananPageNumber(r)
+	perPage := layananPageSize(r)
+	search := strings.TrimSpace(r.URL.Query().Get("search"))
+	departemenID := strings.TrimSpace(r.URL.Query().Get("departemen_id"))
 	page, err := h.layananRepository(r.Context()).ListLayanan(r.Context(), repository.LayananListParams{
-		Page: pageNumber, PerPage: layananPerPage,
+		Page: pageNumber, PerPage: perPage, Search: search, DepartemenID: departemenID,
 	})
 	if err != nil {
 		WriteJSON(w, http.StatusInternalServerError, Response{
@@ -34,13 +41,13 @@ func (h Handler) ListLayanan(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	lastPage := (page.Total + layananPerPage - 1) / layananPerPage
+	lastPage := (page.Total + perPage - 1) / perPage
 	if lastPage < 1 {
 		lastPage = 1
 	}
 	var from *int
 	if len(page.Items) > 0 {
-		value := (pageNumber-1)*layananPerPage + 1
+		value := (pageNumber-1)*perPage + 1
 		from = &value
 	}
 	var nextPageURL *string
@@ -52,10 +59,21 @@ func (h Handler) ListLayanan(w http.ResponseWriter, r *http.Request) {
 	WriteJSON(w, http.StatusOK, LayananPaginationResponse{
 		CurrentPage: pageNumber, Data: page.Items, FirstPageURL: "", From: from,
 		LastPage: lastPage, LastPageURL: "", Links: map[string]any{},
-		NextPageURL: nextPageURL, Total: page.Total, PerPage: layananPerPage,
+		NextPageURL: nextPageURL, Total: page.Total, PerPage: perPage,
 	})
 }
 
+func layananPageSize(r *http.Request) int {
+	perPage, err := strconv.Atoi(r.URL.Query().Get("per_page"))
+	if err != nil || perPage < 1 {
+		return defaultLayananPerPage
+	}
+	if perPage > maxLayananPerPage {
+		return maxLayananPerPage
+	}
+	return perPage
+}
+
 func layananPageNumber(r *http.Request) int {
 	page, err := strconv.Atoi(r.URL.Query().Get("page"))
 	if err != nil || page < 1 {