feat: added pagination to GET /user/invites

internal/api/handler/invite.go

@@ -3,6 +3,7 @@ package handler
 import (
 	"log/slog"
 	"net/http"
+	"strconv"
 
 	"github.com/robindittmar/dttmr-api/internal/api/response"
 	"github.com/robindittmar/dttmr-api/internal/domain"
@@ -94,12 +95,59 @@ func (h *InviteHandler) DeleteInvite(w http.ResponseWriter, r *http.Request) {
 // @Tags Invite
 // @Accept json
 // @Produce json
-// @Success 200 {object} []domain.Invite
+// @Param page query int false "page"
+// @Param count query int false "count"
+// @Success 200 {object} response.Paginated[domain.Invite]
+// @Error 400 {object} response.ErrorResponse "failed to decode request body"
+// @Error 400 {object} response.ErrorResponse "invalid value for page"
+// @Error 400 {object} response.ErrorResponse "invalid value for count"
 // @Error 500 {object} response.ErrorResponse "failed to get invites"
 // @Router /user/invites [get]
 func (h *InviteHandler) GetInvites(w http.ResponseWriter, r *http.Request) {
 	ctx := r.Context()
 
+	pageStr := r.URL.Query().Get("page")
+	if pageStr == "" {
+		pageStr = "1"
+	}
+	countStr := r.URL.Query().Get("count")
+	if countStr == "" {
+		countStr = "10"
+	}
+
+	page, err := strconv.Atoi(pageStr)
+	if err != nil {
+		slog.ErrorContext(ctx,
+			"failed to read page from query",
+			slog.String("page", pageStr))
+		response.Error(ctx, w, http.StatusBadRequest, "failed to decode request url")
+		return
+	}
+
+	count, err := strconv.Atoi(countStr)
+	if err != nil {
+		slog.ErrorContext(ctx,
+			"failed to read count from query",
+			slog.String("count", countStr))
+		response.Error(ctx, w, http.StatusBadRequest, "failed to decode request url")
+		return
+	}
+
+	if page < 1 {
+		slog.ErrorContext(ctx,
+			"page parameter is invalid",
+			slog.Int("page", page))
+		response.Error(ctx, w, http.StatusBadRequest, "invalid value for page")
+		return
+	}
+	if count <= 0 {
+		slog.ErrorContext(ctx,
+			"count parameter is invalid",
+			slog.Int("count", count))
+		response.Error(ctx, w, http.StatusBadRequest, "invalid value for count")
+		return
+	}
+
 	authContext, err := domain.GetAuthContext(ctx)
 	if err != nil {
 		slog.ErrorContext(ctx, "failed to get auth context", slog.Any("error", err))
@@ -107,12 +155,23 @@ func (h *InviteHandler) GetInvites(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	invites, err := h.InviteService.GetInvites(ctx, authContext.UserID)
+	invites, err := h.InviteService.GetInvites(ctx, authContext.UserID, page, count)
 	if err != nil {
 		slog.ErrorContext(ctx, "failed to get invites", slog.Any("error", err))
 		response.Error(ctx, w, http.StatusInternalServerError, "failed to get invites")
 		return
 	}
 
-	response.JSON(ctx, w, http.StatusOK, invites)
+	total, err := h.InviteService.CountInvites(ctx, authContext.UserID)
+	if err != nil {
+		slog.ErrorContext(ctx, "failed to count invites", slog.Any("error", err))
+		response.Error(ctx, w, http.StatusInternalServerError, "failed to get invites")
+		return
+	}
+
+	response.JSON(ctx, w, http.StatusOK, response.Paginated[domain.Invite]{
+		Count: len(invites),
+		Total: total,
+		Data:  invites,
+	})
 }

internal/api/request/invite.go

@@ -0,0 +1,6 @@
+package request
+
+type GetInvitesPayload struct {
+	Page         int
+	CountPerPage int
+}

internal/api/response/paginated.go

@@ -0,0 +1,7 @@
+package response
+
+type Paginated[T any] struct {
+	Count int `json:"count"`
+	Total int `json:"total"`
+	Data  []T `json:"data"`
+}

internal/domain/invite.go

@@ -25,7 +25,8 @@ type InviteRepository interface {
 	DeleteInvite(ctx context.Context, userID string, inviteID string) error
 	ConsumeInvite(ctx context.Context, inviteID string, inviteeUserID string) error
 	GetInvite(ctx context.Context, code string) (*Invite, error)
-	GetInvites(ctx context.Context, userID string) ([]Invite, error)
+	GetInvites(ctx context.Context, userID string, offset int, count int) ([]Invite, error)
+	CountInvites(ctx context.Context, userID string) (int, error)
 }
 
 type InviteService struct {
@@ -89,10 +90,19 @@ func (s *InviteService) GetInvite(ctx context.Context, code string) (*Invite, er
 	return invite, nil
 }
 
-func (s *InviteService) GetInvites(ctx context.Context, userID string) ([]Invite, error) {
+func (s *InviteService) GetInvites(ctx context.Context, userID string, page int, countPerPage int) ([]Invite, error) {
 	if userID == "" {
 		return nil, ErrUserIDMissing
 	}
 
-	return s.repo.GetInvites(ctx, userID)
+	offset := (page - 1) * countPerPage
+	return s.repo.GetInvites(ctx, userID, offset, countPerPage)
+}
+
+func (s *InviteService) CountInvites(ctx context.Context, userID string) (int, error) {
+	if userID == "" {
+		return 0, ErrUserIDMissing
+	}
+
+	return s.repo.CountInvites(ctx, userID)
 }

internal/repository/invite.go

@@ -81,10 +81,10 @@ func (r *InviteRepo) GetInvite(ctx context.Context, code string) (*domain.Invite
 	return &invite, nil
 }
 
-func (r *InviteRepo) GetInvites(ctx context.Context, userID string) ([]domain.Invite, error) {
+func (r *InviteRepo) GetInvites(ctx context.Context, userID string, offset int, count int) ([]domain.Invite, error) {
 	rows, err := r.db.QueryContext(ctx,
-		"SELECT id, code, expires_at, consumed_at FROM invites WHERE inviter_user_id=$1",
+		"SELECT id, code, expires_at, consumed_at FROM invites WHERE inviter_user_id=$1 ORDER BY created_at DESC OFFSET $2 LIMIT $3",
-		userID,
+		userID, offset, count,
 	)
 	if err != nil {
 		if errors.Is(err, sql.ErrNoRows) {
@@ -107,3 +107,16 @@ func (r *InviteRepo) GetInvites(ctx context.Context, userID string) ([]domain.In
 
 	return invites, nil
 }
+
+func (r *InviteRepo) CountInvites(ctx context.Context, userID string) (int, error) {
+	var count int
+	err := r.db.QueryRowContext(ctx,
+		"SELECT COUNT(*) FROM invites WHERE inviter_user_id=$1",
+		userID,
+	).Scan(&count)
+	if err != nil {
+		return 0, fmt.Errorf("failed to count invites: %w", err)
+	}
+
+	return count, nil
+}