From 9f9ce34add7075ee2a218f05753d57f76eeaa755 Mon Sep 17 00:00:00 2001
From: neha_gupta <nehagupta161995@gmail.com>
Date: Tue, 22 Aug 2023 22:03:59 +0530
Subject: [PATCH] add handlers for channels (#4050)

<!-- PR description-->

add Handlers interface for Channels.

#### Does this PR need a docs update or release note?
- [ ] :no_entry: No

#### Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] :sunflower: Feature

#### Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #<issue>

#### Test Plan

<!-- How will this be tested prior to merging.-->
---
 .../m365/collection/groups/handler.go         | 18 +++++++++
 src/pkg/services/m365/api/channels.go         |  1 +
 src/pkg/services/m365/api/channels_pager.go   | 39 +++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 src/internal/m365/collection/groups/handler.go
 create mode 100644 src/pkg/services/m365/api/channels.go
 create mode 100644 src/pkg/services/m365/api/channels_pager.go

diff --git a/src/internal/m365/collection/groups/handler.go b/src/internal/m365/collection/groups/handler.go
new file mode 100644
index 000000000..d4a382149
--- /dev/null
+++ b/src/internal/m365/collection/groups/handler.go
@@ -0,0 +1,18 @@
+package groups
+
+import (
+	"context"
+
+	"github.com/microsoft/kiota-abstractions-go/serialization"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+
+	"github.com/alcionai/corso/src/pkg/services/m365/api"
+)
+
+type BackupMessagesHandler interface {
+	GetMessageByID(ctx context.Context, teamID, channelID, itemID string) (models.ChatMessageable, error)
+	NewMessagePager(teamID, channelID string) api.MessageItemDeltaEnumerator
+	GetChannelByID(ctx context.Context, teamID, channelID string) (models.Channelable, error)
+	NewChannelPager(teamID, channelID string) api.ChannelItemDeltaEnumerator
+	GetReplyByID(ctx context.Context, teamID, channelID, messageID string) (serialization.Parsable, error)
+}
diff --git a/src/pkg/services/m365/api/channels.go b/src/pkg/services/m365/api/channels.go
new file mode 100644
index 000000000..778f64ec1
--- /dev/null
+++ b/src/pkg/services/m365/api/channels.go
@@ -0,0 +1 @@
+package api
diff --git a/src/pkg/services/m365/api/channels_pager.go b/src/pkg/services/m365/api/channels_pager.go
new file mode 100644
index 000000000..599c09649
--- /dev/null
+++ b/src/pkg/services/m365/api/channels_pager.go
@@ -0,0 +1,39 @@
+package api
+
+import (
+	"context"
+)
+
+// ---------------------------------------------------------------------------
+// item pager
+// ---------------------------------------------------------------------------
+
+type MessageItemDeltaEnumerator interface {
+	GetPage(context.Context) (DeltaPageLinker, error)
+}
+
+// TODO: implement
+// var _ MessageItemDeltaEnumerator = &messagePageCtrl{}
+
+// type messagePageCtrl struct {
+// 	gs      graph.Servicer
+// 	builder *teams.ItemChannelsItemMessagesRequestBuilder
+// 	options *teams.ItemChannelsItemMessagesRequestBuilderGetRequestConfiguration
+// }
+
+// ---------------------------------------------------------------------------
+// channel pager
+// ---------------------------------------------------------------------------
+
+type ChannelItemDeltaEnumerator interface {
+	GetPage(context.Context) (DeltaPageLinker, error)
+}
+
+// TODO: implement
+// var _ ChannelsItemDeltaEnumerator = &channelsPageCtrl{}
+
+// type channelsPageCtrl struct {
+// 	gs      graph.Servicer
+// 	builder *teams.ItemChannelsChannelItemRequestBuilder
+// 	options *teams.ItemChannelsChannelItemRequestBuilderGetRequestConfiguration
+// }