refactor: improve progress bar logic and update display (#14)

* fix: Revise progress tracking mechanism

* chore: remove unused getDependencies func

* chore: removed unused property & add fetcher check

* Update pkg/wrapper/npm_base.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Sahil Bansal <bansalsahil315@gmail.com>

* refactor: make SetProgressTracker common for all fetchers

---------

Signed-off-by: Sahil Bansal <bansalsahil315@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

pkg/registry/fetcher.go

@@ -6,7 +6,9 @@ import (
 	"context"
 	"fmt"
 	"sync"
+	"sync/atomic"
 
+	"github.com/safedep/pmg/internal/ui"
 	"github.com/safedep/pmg/pkg/models"
 )
 
@@ -21,9 +23,11 @@ type Fetcher interface {
 
 // BaseFetcher implements common functionality for all registry fetchers
 type BaseFetcher struct {
-	visitedMu sync.RWMutex
+	visitedMu       sync.RWMutex
-	visited   map[string]bool
+	visited         map[string]bool
-	client    RegistryClient
+	client          RegistryClient
+	progressTracker ui.ProgressTracker
+	fetchedDeps     int32
 }
 
 // NewBaseFetcher creates a new BaseFetcher with the specified registry client
@@ -34,6 +38,11 @@ func NewBaseFetcher(client RegistryClient) *BaseFetcher {
 	}
 }
 
+func (bf *BaseFetcher) SetProgressTracker(tracker ui.ProgressTracker) {
+	bf.progressTracker = tracker
+	atomic.StoreInt32(&bf.fetchedDeps, 0)
+}
+
 // isVisited checks if a package has already been visited
 func (bf *BaseFetcher) isVisited(key string) bool {
 	bf.visitedMu.RLock()

pkg/registry/npm_fetcher.go

@@ -5,9 +5,11 @@ import (
 	"encoding/json"
 	"fmt"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/safedep/dry/log"
+	"github.com/safedep/pmg/internal/ui"
 	"github.com/safedep/pmg/pkg/common/utils"
 	"github.com/safedep/pmg/pkg/models"
 )
@@ -17,6 +19,14 @@ type NpmFetcher struct {
 	*BaseFetcher
 }
 
+func (nf *NpmFetcher) incrementProgress() {
+	if nf.progressTracker != nil {
+		atomic.AddInt32(&nf.fetchedDeps, 1)
+		// Update progress message to show number of packages fetched
+		ui.SetPinnedMessageOnProgressWriter(fmt.Sprintf("Fetched %d packages", atomic.LoadInt32(&nf.fetchedDeps)))
+	}
+}
+
 // NewNpmFetcher creates a new NPM registry fetcher
 func NewNpmFetcher(timeout time.Duration) *NpmFetcher {
 	client := NewHttpRegistryClient(
@@ -92,6 +102,8 @@ func (nf *NpmFetcher) fetchDependenciesConcurrent(ctx context.Context, pkg model
 		return nil, fmt.Errorf("failed to fetch package info for %s: %w", pkg.Name, err)
 	}
 
+	nf.incrementProgress()
+
 	dependencies := packageInfo.Dependencies
 	node := &models.DependencyNode{
 		Name:         pkg.Name,

pkg/wrapper/npm_base.go

@@ -66,11 +66,17 @@ func (pmw *PackageManagerWrapper) scanAndInstall(ctx context.Context, progressTr
 		pmw.PackageName = fmt.Sprintf("%s@%s", name, version)
 	}
 
-	deps, err := pmw.getDependencies(ctx, fetcher, name, version, progressTracker)
+	// Get dependencies with progress tracking
+	npmFetcher := fetcher.(*registry.NpmFetcher)
+	npmFetcher.SetProgressTracker(progressTracker)
+
+	deps, err := npmFetcher.GetFlattenedDependencies(ctx, name, version)
 	if err != nil {
 		return err
 	}
 
+	// We know the total deps, set progress for analysis phase
+	ui.IncrementTrackerTotal(progressTracker, int64(len(deps)))
 	if err := pmw.analyzeDependencies(ctx, deps, progressTracker); err != nil {
 		return err
 	}
@@ -88,17 +94,6 @@ func (pmw *PackageManagerWrapper) resolveLatestVersion(ctx context.Context, fetc
 	return version, nil
 }
 
-func (pmw *PackageManagerWrapper) getDependencies(ctx context.Context, fetcher registry.Fetcher, name, version string, progressTracker ui.ProgressTracker) ([]string, error) {
-	ui.IncrementProgress(progressTracker, 1)
-	deps, err := fetcher.GetFlattenedDependencies(ctx, name, version)
-	ui.IncrementProgress(progressTracker, 1)
-	if err != nil {
-		return nil, err
-	}
-	ui.SetTrackerTotal(progressTracker, int64(len(deps)))
-	return deps, nil
-}
-
 func (pmw *PackageManagerWrapper) analyzeDependencies(ctx context.Context, deps []string, progressTracker ui.ProgressTracker) error {
 	client, err := analyser.GetMalwareAnalysisClient()
 	if err != nil {