feat: implement mongo APIs

internal/handler/letter.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"log"
 	"net/http"
 	"strconv"
 
@@ -40,6 +41,7 @@ func (h *LetterHandler) GetByYear(w http.ResponseWriter, r *http.Request) {
 	}
 	docs, err := h.repo.GetByYear(r.Context(), year)
 	if err != nil {
+		log.Printf("[ERROR] GetByYear(%d): %v", year, err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch letters")
 		return
 	}
@@ -50,6 +52,7 @@ func (h *LetterHandler) GetByRecipient(w http.ResponseWriter, r *http.Request) {
 	name := chi.URLParam(r, "name")
 	docs, err := h.repo.GetByRecipient(r.Context(), name)
 	if err != nil {
+		log.Printf("[ERROR] GetByRecipient(%s): %v", name, err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch letters")
 		return
 	}
@@ -60,6 +63,7 @@ func (h *LetterHandler) GetByLocation(w http.ResponseWriter, r *http.Request) {
 	name := chi.URLParam(r, "name")
 	docs, err := h.repo.GetByLocation(r.Context(), name)
 	if err != nil {
+		log.Printf("[ERROR] GetByLocation(%s): %v", name, err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch letters")
 		return
 	}
@@ -69,6 +73,7 @@ func (h *LetterHandler) GetByLocation(w http.ResponseWriter, r *http.Request) {
 func (h *LetterHandler) GetYears(w http.ResponseWriter, r *http.Request) {
 	docs, err := h.repo.GetYears(r.Context())
 	if err != nil {
+		log.Printf("[ERROR] GetYears: %v", err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch years")
 		return
 	}
@@ -78,6 +83,7 @@ func (h *LetterHandler) GetYears(w http.ResponseWriter, r *http.Request) {
 func (h *LetterHandler) GetRecipients(w http.ResponseWriter, r *http.Request) {
 	docs, err := h.repo.GetRecipients(r.Context())
 	if err != nil {
+		log.Printf("[ERROR] GetRecipients: %v", err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch recipients")
 		return
 	}
@@ -87,6 +93,7 @@ func (h *LetterHandler) GetRecipients(w http.ResponseWriter, r *http.Request) {
 func (h *LetterHandler) GetLocations(w http.ResponseWriter, r *http.Request) {
 	docs, err := h.repo.GetLocations(r.Context())
 	if err != nil {
+		log.Printf("[ERROR] GetLocations: %v", err)
 		response.Error(w, http.StatusInternalServerError, "failed to fetch locations")
 		return
 	}
@@ -96,6 +103,7 @@ func (h *LetterHandler) GetLocations(w http.ResponseWriter, r *http.Request) {
 func (h *LetterHandler) Count(w http.ResponseWriter, r *http.Request) {
 	count, err := h.repo.Count(r.Context())
 	if err != nil {
+		log.Printf("[ERROR] Count: %v", err)
 		response.Error(w, http.StatusInternalServerError, "failed to count letters")
 		return
 	}