feat: added pagination to listing files

server/workflow_server.go

@@ -14,6 +14,7 @@ import (
 	log "github.com/sirupsen/logrus"
 	"google.golang.org/grpc/codes"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"math"
 	"sort"
 	"strings"
 	"time"
@@ -475,6 +476,13 @@ func (s *WorkflowServer) ListFiles(ctx context.Context, req *api.ListFilesReques
 		return nil, err
 	}
 
+	if req.Page < 0 {
+		req.Page = 1
+	}
+	if req.PerPage <= 0 {
+		req.PerPage = 15
+	}
+
 	files, err := client.ListFiles(req.Namespace, req.Path)
 	if err != nil {
 		return nil, err
@@ -493,22 +501,43 @@ func (s *WorkflowServer) ListFiles(ctx context.Context, req *api.ListFilesReques
 		}
 	}
 
-	sort.Slice(apiFiles, func(i, j int) bool {
-		fileI := apiFiles[i]
-		fileJ := apiFiles[j]
+	sort.SliceStable(apiFiles, func(i, j int) bool {
+		lhFile := apiFiles[i]
+		rhFile := apiFiles[j]
 
-		if fileI.Directory && !fileJ.Directory {
+		if (lhFile.Directory && rhFile.Directory) ||
+			(!lhFile.Directory && !rhFile.Directory) {
+			return strings.Compare(strings.ToLower(lhFile.Name), strings.ToLower(rhFile.Name)) < 0
+		}
+
+		if lhFile.Directory {
 			return true
 		}
 
-		return strings.Compare(fileI.Path, fileJ.Path) < 0
+		return false
 	})
 
-	parentPath := v1.FilePathToParentPath(req.Path)
+	start := (req.Page - 1) * req.PerPage
+	if start < 0 {
+		start = 0
+	}
+
+	end := int(start + req.PerPage)
+	if end > len(apiFiles) {
+		end = len(apiFiles)
+	}
+	parts := apiFiles[start:end]
+
+	count := len(parts)
+	totalCount := len(apiFiles)
 
 	return &api.ListFilesResponse{
-		Files:      apiFiles,
-		ParentPath: parentPath,
+		Count:      int32(count),
+		Page:       req.Page,
+		Pages:      int32(math.Ceil(float64(totalCount) / float64(req.PerPage))),
+		TotalCount: int32(totalCount),
+		Files:      parts,
+		ParentPath: v1.FilePathToParentPath(req.Path),
 	}, nil
 }