boilerplate introduction of the conversations api (#4570)

adds basic get requests for the conversations api set to the api package.  Plust some other minor change for formatting, correctness, or necessity.

---

#### Does this PR need a docs update or release note?

- [x] ⛔ No

#### Type of change

- [x] 🌻 Feature

#### Issue(s)

* #4536 

#### Test Plan

- [x] 💪 Manual
- [x] ⚡ Unit test
- [x] 💚 E2E

src/internal/operations/test/helper_test.go

@@ -738,6 +738,7 @@ func verifyExtensionData(
 	case path.OneDriveService:
 		detailsSize = itemInfo.OneDrive.Size
 	case path.GroupsService:
+		// FIXME: needs update for message.
 		detailsSize = itemInfo.Groups.Size
 	default:
 		assert.Fail(t, "unrecognized data type")

src/pkg/backup/details/groups.go

@@ -42,8 +42,11 @@ type GroupsInfo struct {
 	Modified time.Time `json:"modified,omitempty"`
 
 	// Channels Specific
-	Message   ChannelMessageInfo `json:"message"`
-	LastReply ChannelMessageInfo `json:"lastReply"`
+	Message   ChannelMessageInfo `json:"message,omitempty"`
+	LastReply ChannelMessageInfo `json:"lastReply,omitempty"`
+
+	// Conversations Specific
+	Post ConversationPostInfo `json:"post,omitempty"`
 
 	// SharePoint specific
 	Created    time.Time `json:"created,omitempty"`
@@ -57,6 +60,14 @@ type GroupsInfo struct {
 	WebURL     string    `json:"webURL,omitempty"`
 }
 
+type ConversationPostInfo struct {
+	CreatedAt time.Time `json:"createdAt,omitempty"`
+	Creator   string    `json:"creator,omitempty"`
+	Preview   string    `json:"preview,omitempty"`
+	Size      int64     `json:"size,omitempty"`
+	Subject   string    `json:"subject,omitempty"`
+}
+
 type ChannelMessageInfo struct {
 	AttachmentNames []string  `json:"attachmentNames,omitempty"`
 	CreatedAt       time.Time `json:"createdAt,omitempty"`

src/pkg/backup/details/iteminfo.go

@@ -40,6 +40,7 @@ const (
 
 	// Groups/Teams(40x)
 	GroupsChannelMessage   ItemType = 401
+	GroupsConversationPost ItemType = 402
 )
 
 func UpdateItem(item *ItemInfo, newLocPath *path.Builder) {

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

@@ -52,11 +52,8 @@ func (c Channels) GetChannel(
 		Channels().
 		ByChannelId(containerID).
 		Get(ctx, config)
-	if err != nil {
-		return nil, graph.Stack(ctx, err)
-	}
 
-	return resp, nil
+	return resp, graph.Stack(ctx, err).OrNil()
 }
 
 // GetChannelByName fetches a channel by name

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

@@ -76,7 +76,6 @@ func (c Channels) NewChannelMessagePager(
 }
 
 // GetChannelMessages fetches a delta of all messages in the channel.
-// returns two maps: addedItems, deletedItems
 func (c Channels) GetChannelMessages(
 	ctx context.Context,
 	teamID, channelID string,

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

@@ -0,0 +1,130 @@
+package api
+
+import (
+	"context"
+
+	"github.com/alcionai/clues"
+	"github.com/jaytaylor/html2text"
+	"github.com/microsoftgraph/msgraph-sdk-go/groups"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+
+	"github.com/alcionai/corso/src/internal/common/ptr"
+	"github.com/alcionai/corso/src/internal/common/str"
+	"github.com/alcionai/corso/src/internal/m365/graph"
+	"github.com/alcionai/corso/src/pkg/backup/details"
+)
+
+// ---------------------------------------------------------------------------
+// controller
+// ---------------------------------------------------------------------------
+
+func (c Client) Conversations() Conversations {
+	return Conversations{c}
+}
+
+// Conversations is an interface-compliant provider of the client.
+type Conversations struct {
+	Client
+}
+
+// ---------------------------------------------------------------------------
+// Item (conversation thread post)
+// ---------------------------------------------------------------------------
+
+func (c Conversations) GetConversationPost(
+	ctx context.Context,
+	groupID, conversationID, threadID, postID string,
+	cc CallConfig,
+) (models.Postable, *details.GroupsInfo, error) {
+	config := &groups.ItemConversationsItemThreadsItemPostsPostItemRequestBuilderGetRequestConfiguration{
+		QueryParameters: &groups.ItemConversationsItemThreadsItemPostsPostItemRequestBuilderGetQueryParameters{},
+	}
+
+	if len(cc.Select) > 0 {
+		config.QueryParameters.Select = cc.Select
+	}
+
+	if len(cc.Expand) > 0 {
+		config.QueryParameters.Expand = append(config.QueryParameters.Expand, cc.Expand...)
+	}
+
+	post, err := c.Stable.
+		Client().
+		Groups().
+		ByGroupId(groupID).
+		Conversations().
+		ByConversationId(conversationID).
+		Threads().
+		ByConversationThreadId(threadID).
+		Posts().
+		ByPostId(postID).
+		Get(ctx, config)
+	if err != nil {
+		return nil, nil, graph.Stack(ctx, err)
+	}
+
+	return post, conversationPostInfo(post), graph.Stack(ctx, err).OrNil()
+}
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+func conversationPostInfo(
+	post models.Postable,
+) *details.GroupsInfo {
+	if post == nil {
+		return nil
+	}
+
+	preview, contentLen, err := getConversationPostContentPreview(post)
+	if err != nil {
+		preview = "malformed or unparseable html" + preview
+	}
+
+	var sender string
+	if post.GetSender() != nil && post.GetSender().GetEmailAddress() != nil {
+		sender = ptr.Val(post.GetSender().GetEmailAddress().GetAddress())
+	}
+
+	size := contentLen
+
+	for _, a := range post.GetAttachments() {
+		size += int64(ptr.Val(a.GetSize()))
+	}
+
+	cpi := details.ConversationPostInfo{
+		CreatedAt: ptr.Val(post.GetCreatedDateTime()),
+		Creator:   sender,
+		Preview:   preview,
+		Size:      size,
+	}
+
+	return &details.GroupsInfo{
+		ItemType: details.GroupsConversationPost,
+		Modified: ptr.Val(post.GetLastModifiedDateTime()),
+		Post:     cpi,
+	}
+}
+
+func getConversationPostContentPreview(post models.Postable) (string, int64, error) {
+	content, origSize, err := stripConversationPostHTML(post)
+	return str.Preview(content, 128), origSize, clues.Stack(err).OrNil()
+}
+
+func stripConversationPostHTML(post models.Postable) (string, int64, error) {
+	var (
+		content  string
+		origSize int64
+	)
+
+	if post.GetBody() != nil {
+		content = ptr.Val(post.GetBody().GetContent())
+	}
+
+	origSize = int64(len(content))
+
+	content, err := html2text.FromString(content)
+
+	return content, origSize, clues.Stack(err).OrNil()
+}

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

@@ -0,0 +1,232 @@
+package api
+
+import (
+	"context"
+
+	"github.com/alcionai/clues"
+	"github.com/microsoftgraph/msgraph-sdk-go/groups"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+
+	"github.com/alcionai/corso/src/internal/m365/graph"
+	"github.com/alcionai/corso/src/pkg/services/m365/api/pagers"
+)
+
+// ---------------------------------------------------------------------------
+// conversation pager
+// ---------------------------------------------------------------------------
+
+var _ pagers.NonDeltaHandler[models.Conversationable] = &conversationsPageCtrl{}
+
+type conversationsPageCtrl struct {
+	resourceID string
+	gs         graph.Servicer
+	builder    *groups.ItemConversationsRequestBuilder
+	options    *groups.ItemConversationsRequestBuilderGetRequestConfiguration
+}
+
+func (p *conversationsPageCtrl) SetNextLink(nextLink string) {
+	p.builder = groups.NewItemConversationsRequestBuilder(nextLink, p.gs.Adapter())
+}
+
+func (p *conversationsPageCtrl) GetPage(
+	ctx context.Context,
+) (pagers.NextLinkValuer[models.Conversationable], error) {
+	resp, err := p.builder.Get(ctx, p.options)
+	return resp, graph.Stack(ctx, err).OrNil()
+}
+
+func (p *conversationsPageCtrl) ValidModTimes() bool {
+	return true
+}
+
+func (c Conversations) NewConversationsPager(
+	groupID string,
+	cc CallConfig,
+) *conversationsPageCtrl {
+	builder := c.Stable.
+		Client().
+		Groups().
+		ByGroupId(groupID).
+		Conversations()
+
+	options := &groups.ItemConversationsRequestBuilderGetRequestConfiguration{
+		QueryParameters: &groups.ItemConversationsRequestBuilderGetQueryParameters{},
+		Headers:         newPreferHeaders(preferPageSize(maxNonDeltaPageSize)),
+	}
+
+	if len(cc.Select) > 0 {
+		options.QueryParameters.Select = cc.Select
+	}
+
+	return &conversationsPageCtrl{
+		resourceID: groupID,
+		builder:    builder,
+		gs:         c.Stable,
+		options:    options,
+	}
+}
+
+// GetConversations fetches all conversations in the group.
+func (c Conversations) GetConversations(
+	ctx context.Context,
+	groupID string,
+	cc CallConfig,
+) ([]models.Conversationable, error) {
+	pager := c.NewConversationsPager(groupID, cc)
+	items, err := pagers.BatchEnumerateItems[models.Conversationable](ctx, pager)
+
+	return items, graph.Stack(ctx, err).OrNil()
+}
+
+// ---------------------------------------------------------------------------
+// conversation thread pager
+// ---------------------------------------------------------------------------
+
+var _ pagers.NonDeltaHandler[models.ConversationThreadable] = &conversationThreadsPageCtrl{}
+
+type conversationThreadsPageCtrl struct {
+	resourceID, conversationID string
+	gs                         graph.Servicer
+	builder                    *groups.ItemConversationsItemThreadsRequestBuilder
+	options                    *groups.ItemConversationsItemThreadsRequestBuilderGetRequestConfiguration
+}
+
+func (p *conversationThreadsPageCtrl) SetNextLink(nextLink string) {
+	p.builder = groups.NewItemConversationsItemThreadsRequestBuilder(nextLink, p.gs.Adapter())
+}
+
+func (p *conversationThreadsPageCtrl) GetPage(
+	ctx context.Context,
+) (pagers.NextLinkValuer[models.ConversationThreadable], error) {
+	resp, err := p.builder.Get(ctx, p.options)
+	return resp, graph.Stack(ctx, err).OrNil()
+}
+
+func (p *conversationThreadsPageCtrl) ValidModTimes() bool {
+	return true
+}
+
+func (c Conversations) NewConversationThreadsPager(
+	groupID, conversationID string,
+	cc CallConfig,
+) *conversationThreadsPageCtrl {
+	builder := c.Stable.
+		Client().
+		Groups().
+		ByGroupId(groupID).
+		Conversations().
+		ByConversationId(conversationID).
+		Threads()
+
+	options := &groups.ItemConversationsItemThreadsRequestBuilderGetRequestConfiguration{
+		QueryParameters: &groups.ItemConversationsItemThreadsRequestBuilderGetQueryParameters{},
+		Headers:         newPreferHeaders(preferPageSize(maxNonDeltaPageSize)),
+	}
+
+	if len(cc.Select) > 0 {
+		options.QueryParameters.Select = cc.Select
+	}
+
+	if len(cc.Expand) > 0 {
+		options.QueryParameters.Expand = cc.Expand
+	}
+
+	return &conversationThreadsPageCtrl{
+		resourceID:     groupID,
+		conversationID: conversationID,
+		builder:        builder,
+		gs:             c.Stable,
+		options:        options,
+	}
+}
+
+// GetConversations fetches all conversations in the group.
+func (c Conversations) GetConversationThreads(
+	ctx context.Context,
+	groupID, conversationID string,
+	cc CallConfig,
+) ([]models.ConversationThreadable, error) {
+	ctx = clues.Add(ctx, "conversation_id", conversationID)
+	pager := c.NewConversationThreadsPager(groupID, conversationID, cc)
+	items, err := pagers.BatchEnumerateItems[models.ConversationThreadable](ctx, pager)
+
+	return items, graph.Stack(ctx, err).OrNil()
+}
+
+// ---------------------------------------------------------------------------
+// conversation thread post pager
+// ---------------------------------------------------------------------------
+
+var _ pagers.NonDeltaHandler[models.Postable] = &conversationThreadPostsPageCtrl{}
+
+type conversationThreadPostsPageCtrl struct {
+	resourceID, conversationID, threadID string
+	gs                                   graph.Servicer
+	builder                              *groups.ItemConversationsItemThreadsItemPostsRequestBuilder
+	options                              *groups.ItemConversationsItemThreadsItemPostsRequestBuilderGetRequestConfiguration
+}
+
+func (p *conversationThreadPostsPageCtrl) SetNextLink(nextLink string) {
+	p.builder = groups.NewItemConversationsItemThreadsItemPostsRequestBuilder(nextLink, p.gs.Adapter())
+}
+
+func (p *conversationThreadPostsPageCtrl) GetPage(
+	ctx context.Context,
+) (pagers.NextLinkValuer[models.Postable], error) {
+	resp, err := p.builder.Get(ctx, p.options)
+	return resp, graph.Stack(ctx, err).OrNil()
+}
+
+func (p *conversationThreadPostsPageCtrl) ValidModTimes() bool {
+	return true
+}
+
+func (c Conversations) NewConversationThreadPostsPager(
+	groupID, conversationID, threadID string,
+	cc CallConfig,
+) *conversationThreadPostsPageCtrl {
+	builder := c.Stable.
+		Client().
+		Groups().
+		ByGroupId(groupID).
+		Conversations().
+		ByConversationId(conversationID).
+		Threads().
+		ByConversationThreadId(threadID).
+		Posts()
+
+	options := &groups.ItemConversationsItemThreadsItemPostsRequestBuilderGetRequestConfiguration{
+		QueryParameters: &groups.ItemConversationsItemThreadsItemPostsRequestBuilderGetQueryParameters{},
+		Headers:         newPreferHeaders(preferPageSize(maxNonDeltaPageSize)),
+	}
+
+	if len(cc.Select) > 0 {
+		options.QueryParameters.Select = cc.Select
+	}
+
+	if len(cc.Expand) > 0 {
+		options.QueryParameters.Expand = cc.Expand
+	}
+
+	return &conversationThreadPostsPageCtrl{
+		resourceID:     groupID,
+		conversationID: conversationID,
+		threadID:       threadID,
+		builder:        builder,
+		gs:             c.Stable,
+		options:        options,
+	}
+}
+
+// GetConversations fetches all conversations in the group.
+func (c Conversations) GetConversationThreadPosts(
+	ctx context.Context,
+	groupID, conversationID, threadID string,
+	cc CallConfig,
+) ([]models.Postable, error) {
+	ctx = clues.Add(ctx, "conversation_id", conversationID)
+	pager := c.NewConversationThreadPostsPager(groupID, conversationID, threadID, cc)
+	items, err := pagers.BatchEnumerateItems[models.Postable](ctx, pager)
+
+	return items, graph.Stack(ctx, err).OrNil()
+}

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

@@ -0,0 +1,120 @@
+package api
+
+import (
+	"testing"
+
+	"github.com/alcionai/clues"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+
+	"github.com/alcionai/corso/src/internal/common/ptr"
+	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/internal/tester/tconfig"
+)
+
+type ConversationsPagerIntgSuite struct {
+	tester.Suite
+	its intgTesterSetup
+}
+
+func TestConversationsPagerIntgSuite(t *testing.T) {
+	suite.Run(t, &ConversationsPagerIntgSuite{
+		Suite: tester.NewIntegrationSuite(
+			t,
+			[][]string{tconfig.M365AcctCredEnvs}),
+	})
+}
+
+func (suite *ConversationsPagerIntgSuite) SetupSuite() {
+	suite.its = newIntegrationTesterSetup(suite.T())
+}
+
+func (suite *ConversationsPagerIntgSuite) TestEnumerateConversations_withThreadsAndPosts() {
+	var (
+		t  = suite.T()
+		ac = suite.its.ac.Conversations()
+	)
+
+	ctx, flush := tester.NewContext(t)
+	defer flush()
+
+	convs, err := ac.GetConversations(ctx, suite.its.group.id, CallConfig{})
+	require.NoError(t, err, clues.ToCore(err))
+	require.NotEmpty(t, convs)
+
+	for _, conv := range convs {
+		threads := testEnumerateConvThreads(suite, conv)
+
+		for _, thread := range threads {
+			posts := testEnumerateConvPosts(suite, conv, thread)
+
+			for _, post := range posts {
+				testGetPostByID(suite, conv, thread, post)
+			}
+		}
+	}
+}
+
+func testEnumerateConvThreads(
+	suite *ConversationsPagerIntgSuite,
+	conv models.Conversationable,
+) []models.ConversationThreadable {
+	var threads []models.ConversationThreadable
+
+	suite.Run("threads", func() {
+		var (
+			t   = suite.T()
+			ac  = suite.its.ac.Conversations()
+			err error
+		)
+
+		ctx, flush := tester.NewContext(t)
+		defer flush()
+
+		threads, err = ac.GetConversationThreads(
+			ctx,
+			suite.its.group.id,
+			ptr.Val(conv.GetId()),
+			CallConfig{})
+		require.NoError(t, err, clues.ToCore(err))
+		// to the best of our knowledge, there's only ever one
+		// thread per conversation.  Even trying to create a new
+		// thread within a conversation will create an entirely
+		// new conversation.  We want this test to fail as a potential
+		// identifier if that changes on us.
+		require.Equal(t, 1, len(threads))
+	})
+
+	return threads
+}
+
+func testEnumerateConvPosts(
+	suite *ConversationsPagerIntgSuite,
+	conv models.Conversationable,
+	thread models.ConversationThreadable,
+) []models.Postable {
+	var posts []models.Postable
+
+	suite.Run("posts", func() {
+		var (
+			t   = suite.T()
+			ac  = suite.its.ac.Conversations()
+			err error
+		)
+
+		ctx, flush := tester.NewContext(t)
+		defer flush()
+
+		posts, err = ac.GetConversationThreadPosts(
+			ctx,
+			suite.its.group.id,
+			ptr.Val(conv.GetId()),
+			ptr.Val(thread.GetId()),
+			CallConfig{})
+		require.NoError(t, err, clues.ToCore(err))
+		require.NotEmpty(t, posts)
+	})
+
+	return posts
+}

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

@@ -0,0 +1,267 @@
+package api
+
+import (
+	"testing"
+	"time"
+
+	"github.com/alcionai/clues"
+	"github.com/h2non/gock"
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+
+	"github.com/alcionai/corso/src/internal/common/ptr"
+	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/internal/tester/tconfig"
+	"github.com/alcionai/corso/src/pkg/backup/details"
+)
+
+// called by the pager test, since it is already enumerating
+// posts.
+func testGetPostByID(
+	suite *ConversationsPagerIntgSuite,
+	conv models.Conversationable,
+	thread models.ConversationThreadable,
+	post models.Postable,
+) {
+	suite.Run("post_by_id", func() {
+		var (
+			t  = suite.T()
+			ac = suite.its.ac.Conversations()
+		)
+
+		ctx, flush := tester.NewContext(t)
+		defer flush()
+
+		resp, _, err := ac.GetConversationPost(
+			ctx,
+			suite.its.group.id,
+			ptr.Val(conv.GetId()),
+			ptr.Val(thread.GetId()),
+			ptr.Val(post.GetId()),
+			CallConfig{})
+		require.NoError(t, err, clues.ToCore(err))
+		require.Equal(t, ptr.Val(post.GetId()), ptr.Val(resp.GetId()))
+	})
+}
+
+type ConversationsAPIUnitSuite struct {
+	tester.Suite
+}
+
+func TestConversationsAPIUnitSuite(t *testing.T) {
+	suite.Run(t, &ConversationsAPIUnitSuite{Suite: tester.NewUnitSuite(t)})
+}
+
+func (suite *ConversationsAPIUnitSuite) TestConversationPostInfo() {
+	var (
+		now     = time.Now()
+		content = "content"
+		body    = models.NewItemBody()
+	)
+
+	body.SetContent(ptr.To(content))
+
+	tests := []struct {
+		name        string
+		postAndInfo func() (models.Postable, *details.GroupsInfo)
+	}{
+		{
+			name: "No body",
+			postAndInfo: func() (models.Postable, *details.GroupsInfo) {
+				post := models.NewPost()
+				post.SetCreatedDateTime(&now)
+				post.SetLastModifiedDateTime(&now)
+
+				sender := "foo@bar.com"
+				sea := models.NewEmailAddress()
+				sea.SetAddress(&sender)
+
+				recipient := models.NewRecipient()
+				recipient.SetEmailAddress(sea)
+
+				post.SetSender(recipient)
+
+				iden := models.NewIdentity()
+				iden.SetDisplayName(ptr.To("user"))
+
+				i := &details.GroupsInfo{
+					ItemType: details.GroupsConversationPost,
+					Modified: now,
+					Post: details.ConversationPostInfo{
+						CreatedAt: now,
+						Creator:   "foo@bar.com",
+						Preview:   "",
+						Size:      0,
+						// TODO: feed the subject in from the conversation
+						Subject: "",
+					},
+				}
+
+				return post, i
+			},
+		},
+	}
+	for _, test := range tests {
+		suite.Run(test.name, func() {
+			t := suite.T()
+
+			chMsg, expected := test.postAndInfo()
+			result := conversationPostInfo(chMsg)
+
+			assert.Equal(t, expected, result)
+		})
+	}
+}
+
+type ConversationAPIIntgSuite struct {
+	tester.Suite
+	its intgTesterSetup
+}
+
+// We do end up mocking the actual request, but creating the rest
+// similar to full integration tests.
+func TestConversationAPIIntgSuite(t *testing.T) {
+	suite.Run(t, &ConversationAPIIntgSuite{
+		Suite: tester.NewIntegrationSuite(
+			t,
+			[][]string{tconfig.M365AcctCredEnvs}),
+	})
+}
+
+func (suite *ConversationAPIIntgSuite) SetupSuite() {
+	suite.its = newIntegrationTesterSetup(suite.T())
+}
+
+func (suite *ConversationAPIIntgSuite) TestConversations_attachmentListDownload() {
+	pid := "fake-post-id"
+	aid := "fake-attachment-id"
+
+	tests := []struct {
+		name            string
+		setupf          func()
+		attachmentCount int
+		size            int64
+		expect          assert.ErrorAssertionFunc
+	}{
+		{
+			name: "no attachments",
+			setupf: func() {
+				itm := models.NewPost()
+				itm.SetId(&pid)
+
+				interceptV1Path(
+					"groups",
+					"group",
+					"conversations",
+					"conv",
+					"threads",
+					"thread",
+					"posts",
+					pid).
+					Reply(200).
+					JSON(requireParseableToMap(suite.T(), itm))
+			},
+			expect: assert.NoError,
+		},
+		{
+			name: "fetch with attachment",
+			setupf: func() {
+				itm := models.NewPost()
+				itm.SetId(&pid)
+				itm.SetHasAttachments(ptr.To(true))
+
+				attch := models.NewAttachment()
+				attch.SetSize(ptr.To[int32](50))
+
+				itm.SetAttachments([]models.Attachmentable{attch})
+
+				interceptV1Path(
+					"groups",
+					"group",
+					"conversations",
+					"conv",
+					"threads",
+					"thread",
+					"posts",
+					pid).
+					Reply(200).
+					JSON(requireParseableToMap(suite.T(), itm))
+			},
+			attachmentCount: 1,
+			size:            50,
+			expect:          assert.NoError,
+		},
+		{
+			name: "fetch multiple individual attachments",
+			setupf: func() {
+				truthy := true
+				itm := models.NewPost()
+				itm.SetId(&pid)
+				itm.SetHasAttachments(&truthy)
+
+				attch := models.NewAttachment()
+				attch.SetId(&aid)
+				attch.SetSize(ptr.To[int32](200))
+
+				itm.SetAttachments([]models.Attachmentable{attch, attch, attch, attch, attch})
+
+				interceptV1Path(
+					"groups",
+					"group",
+					"conversations",
+					"conv",
+					"threads",
+					"thread",
+					"posts",
+					pid).
+					Reply(200).
+					JSON(requireParseableToMap(suite.T(), itm))
+			},
+			attachmentCount: 5,
+			size:            1000,
+			expect:          assert.NoError,
+		},
+	}
+
+	for _, test := range tests {
+		suite.Run(test.name, func() {
+			t := suite.T()
+
+			ctx, flush := tester.NewContext(t)
+			defer flush()
+
+			defer gock.Off()
+			test.setupf()
+
+			item, _, err := suite.its.gockAC.
+				Conversations().
+				GetConversationPost(
+					ctx,
+					"group",
+					"conv",
+					"thread",
+					pid,
+					CallConfig{})
+			test.expect(t, err)
+
+			var size int64
+
+			if item.GetBody() != nil {
+				content := ptr.Val(item.GetBody().GetContent())
+				size = int64(len(content))
+			}
+
+			attachments := item.GetAttachments()
+			for _, attachment := range attachments {
+				size += int64(*attachment.GetSize())
+			}
+
+			assert.Equal(t, *item.GetId(), pid)
+			assert.Equal(t, test.attachmentCount, len(attachments), "attachment count")
+			assert.Equal(t, test.size, size, "item size")
+			assert.True(t, gock.IsDone(), "made all requests")
+		})
+	}
+}

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

@@ -324,7 +324,7 @@ func (c Mail) GetItem(
 	logger.CtxErr(ctx, err).Info("fetching all attachments by id")
 
 	// Getting size just to log in case of error
-	attachConfig.QueryParameters.Select = []string{"id", "size"}
+	attachConfig.QueryParameters.Select = idAnd("size")
 
 	attachments, err := c.LargeItem.
 		Client().
@@ -348,6 +348,11 @@ func (c Mail) GetItem(
 			Headers: newPreferHeaders(preferImmutableIDs(immutableIDs)),
 		}
 
+		ictx := clues.Add(
+			ctx,
+			"attachment_id", ptr.Val(a.GetId()),
+			"attachment_size", ptr.Val(a.GetSize()))
+
 		att, err := c.Stable.
 			Client().
 			Users().
@@ -356,17 +361,13 @@ func (c Mail) GetItem(
 			ByMessageId(itemID).
 			Attachments().
 			ByAttachmentId(ptr.Val(a.GetId())).
-			Get(ctx, attachConfig)
+			Get(ictx, attachConfig)
 		if err != nil {
 			// CannotOpenFileAttachment errors are not transient and
 			// happens possibly from the original item somehow getting
 			// deleted from M365 and so we can skip these
 			if graph.IsErrCannotOpenFileAttachment(err) {
-				logger.CtxErr(ctx, err).
-					With(
-						"attachment_id", ptr.Val(a.GetId()),
-						"attachment_size", ptr.Val(a.GetSize())).
-					Info("attachment not found")
+				logger.CtxErr(ictx, err).Info("attachment not found")
 				// TODO This should use a `AddSkip` once we have
 				// figured out the semantics for skipping
 				// subcomponents of an item
@@ -374,8 +375,7 @@ func (c Mail) GetItem(
 				continue
 			}
 
-			return nil, nil, graph.Wrap(ctx, err, "getting mail attachment").
-				With("attachment_id", ptr.Val(a.GetId()), "attachment_size", ptr.Val(a.GetSize()))
+			return nil, nil, graph.Wrap(ictx, err, "getting mail attachment")
 		}
 
 		atts = append(atts, att)

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

@@ -204,7 +204,7 @@ func (suite *MailAPIIntgSuite) SetupSuite() {
 	suite.its = newIntegrationTesterSetup(suite.T())
 }
 
-func (suite *MailAPIIntgSuite) TestHugeAttachmentListDownload() {
+func (suite *MailAPIIntgSuite) TestMail_attachmentListDownload() {
 	mid := "fake-message-id"
 	aid := "fake-attachment-id"
 
@@ -369,7 +369,7 @@ func (suite *MailAPIIntgSuite) TestHugeAttachmentListDownload() {
 	}
 }
 
-func (suite *MailAPIIntgSuite) TestMail_RestoreLargeAttachment() {
+func (suite *MailAPIIntgSuite) TestMail_PostLargeAttachment() {
 	t := suite.T()
 
 	ctx, flush := tester.NewContext(t)