Add paginate backups functionality

internal/service/backups/list_backups.go

@@ -1,13 +0,0 @@
-package backups
-
-import (
-	"context"
-
-	"github.com/eduardolat/pgbackweb/internal/database/dbgen"
-)
-
-func (s *Service) ListBackups(
-	ctx context.Context,
-) ([]dbgen.Backup, error) {
-	return s.dbgen.BackupsServiceListBackups(ctx)
-}

internal/service/backups/list_backups.sql

@@ -1,2 +0,0 @@
--- name: BackupsServiceListBackups :many
-SELECT * FROM backups;

internal/service/backups/paginate_backups.go

@@ -0,0 +1,44 @@
+package backups
+
+import (
+	"context"
+
+	"github.com/eduardolat/pgbackweb/internal/database/dbgen"
+	"github.com/eduardolat/pgbackweb/internal/util/paginateutil"
+)
+
+type PaginateBackupsParams struct {
+	Page  int
+	Limit int
+}
+
+func (s *Service) PaginateBackups(
+	ctx context.Context, params PaginateBackupsParams,
+) (paginateutil.PaginateResponse, []dbgen.Backup, error) {
+	page := max(params.Page, 1)
+	limit := max(params.Limit, 100)
+
+	count, err := s.dbgen.BackupsServicePaginateBackupsCount(ctx)
+	if err != nil {
+		return paginateutil.PaginateResponse{}, nil, err
+	}
+
+	paginateParams := paginateutil.PaginateParams{
+		Page:  page,
+		Limit: limit,
+	}
+	offset := paginateutil.CreateOffsetFromParams(paginateParams)
+	paginateResponse := paginateutil.CreatePaginateResponse(paginateParams, int(count))
+
+	backups, err := s.dbgen.BackupsServicePaginateBackups(
+		ctx, dbgen.BackupsServicePaginateBackupsParams{
+			Limit:  int32(params.Limit),
+			Offset: int32(offset),
+		},
+	)
+	if err != nil {
+		return paginateutil.PaginateResponse{}, nil, err
+	}
+
+	return paginateResponse, backups, nil
+}

internal/service/backups/paginate_backups.sql

@@ -0,0 +1,8 @@
+-- name: BackupsServicePaginateBackupsCount :one
+SELECT COUNT(*) FROM backups;
+
+-- name: BackupsServicePaginateBackups :many
+SELECT *
+FROM backups
+ORDER BY created_at DESC
+LIMIT sqlc.arg('limit') OFFSET sqlc.arg('offset');