use channel pager

src/internal/m365/collection/groups/backup.go

@@ -153,7 +153,9 @@ func populateCollections(
 			// prevDelta   = dp.Delta
 			// prevPathStr = dp.Path // do not log: pii; log prevPath instead
 			// prevPath    path.Path
-			ictx = clues.Add(
+			// TODO: update this path
+			previousPath string
+			ictx         = clues.Add(
 				ctx,
 				"channel_id", cID)
 			// "previous_delta", pii.SafeURL{
@@ -182,7 +184,7 @@ func populateCollections(
 		// TODO: the handler should provide this implementation.
 		items, err := collectItems(
 			ctx,
-			bh.NewMessagePager(qp.ProtectedResource.ID(), ptr.Val(c.GetId())))
+			bh.NewMessagePager(qp.ProtectedResource.ID(), ptr.Val(c.GetId()), previousPath))
 		if err != nil {
 			el.AddRecoverable(ctx, clues.Stack(err))
 			continue

src/internal/m365/collection/groups/channels_handler.go

@@ -33,7 +33,7 @@ func (gHandler groupBackupHandler) GetChannelByID(
 
 func (gHandler groupBackupHandler) NewChannelsPager(
 	teamID string,
-) api.ChannelDeltaEnumerator {
+) api.Pager[models.Channelable] {
 	return gHandler.ac.NewChannelPager(teamID)
 }
 
@@ -46,9 +46,9 @@ func (gHandler groupBackupHandler) GetMessageByID(
 }
 
 func (gHandler groupBackupHandler) NewMessagePager(
-	teamID, channelID string,
-) api.ChannelMessageDeltaEnumerator {
-	return gHandler.ac.NewMessagePager(teamID, channelID)
+	teamID, channelID, prevDelta string,
+) api.DeltaPager[models.ChatMessageable] {
+	return gHandler.ac.NewChannelMessageDeltaPager(teamID, channelID, prevDelta)
 }
 
 func (gHandler groupBackupHandler) GetMessageReplies(

src/internal/m365/collection/groups/handlers.go

@@ -23,7 +23,7 @@ type BackupHandler interface {
 		teamID, channelID, itemID string,
 	) (models.ChatMessageable, error)
 	NewMessagePager(
-		teamID, channelID string,
+		teamID, channelID, prevDelta string,
 	) api.DeltaPager[models.ChatMessageable]
 
 	GetMessageReplies(

src/pkg/services/m365/api/channels_pager.go

@@ -51,13 +51,6 @@ func (p *channelMessageDeltaPageCtrl) ValuesIn(l PageLinker) ([]models.ChatMessa
 	return getValues[models.ChatMessageable](l)
 }
 
-type ChannelDeltaEnumerator interface {
-	PageLinker
-	ValuesInPageLinker[models.Channelable]
-	SetNextLinker
-	GetPage(ctx context.Context) (PageLinker, error)
-}
-
 func (c Channels) NewChannelMessageDeltaPager(
 	teamID, channelID, prevDelta string,
 ) *channelMessageDeltaPageCtrl {
@@ -87,57 +80,6 @@ func (c Channels) NewChannelMessageDeltaPager(
 	}
 }
 
-// var _ ChannelMessageDeltaEnumerator = &ChannelMessageDeltaPageCtrl{}
-var _ Pager[models.Channelable] = &channelPageCtrl{}
-
-type ChannelMessageDeltaPageCtrl struct {
-	gs      graph.Servicer
-	builder *teams.ItemChannelsItemMessagesDeltaRequestBuilder
-	options *teams.ItemChannelsItemMessagesDeltaRequestBuilderGetRequestConfiguration
-}
-
-func (c Channels) NewMessagePager(
-	teamID, channelID string,
-	fields []string,
-) *ChannelMessageDeltaPageCtrl {
-	res := &ChannelMessageDeltaPageCtrl{
-		gs:      c.Stable,
-		options: nil,
-		builder: c.Stable.
-			Client().
-			Teams().
-			ByTeamId(teamID).
-			Channels().
-			ByChannelId(channelID).
-			Messages().
-			Delta(),
-	}
-
-	return res
-}
-
-func (p *ChannelMessageDeltaPageCtrl) SetNext(nextLink string) {
-	p.builder = teams.NewItemChannelsItemMessagesDeltaRequestBuilder(nextLink, p.gs.Adapter())
-}
-
-func (p *ChannelMessageDeltaPageCtrl) GetPage(ctx context.Context) (DeltaPageLinker, error) {
-	var (
-		resp DeltaPageLinker
-		err  error
-	)
-
-	resp, err = p.builder.Get(ctx, p.options)
-	if err != nil {
-		return nil, graph.Stack(ctx, err)
-	}
-
-	return resp, nil
-}
-
-func (p *ChannelMessageDeltaPageCtrl) ValuesIn(l PageLinker) ([]models.ChatMessageable, error) {
-	return getValues[models.ChatMessageable](l)
-}
-
 // ---------------------------------------------------------------------------
 // non delta channel message pager
 // ---------------------------------------------------------------------------