feat: add msglib receive adapter

internal/isphere/msglib_source.go

@@ -0,0 +1,98 @@
+package isphere
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"isphere-ai-bridge/internal/msglib"
+)
+
+type MsgLibMessageLister interface {
+	ListMessages(ctx context.Context, opts msglib.ListMessagesOptions) (msglib.ListMessagesResult, error)
+}
+
+type MsgLibMessageSource struct {
+	Lister                    MsgLibMessageLister
+	IncludeBody               bool
+	IncludeAttachmentMetadata bool
+}
+
+func (s MsgLibMessageSource) ReceiveMessages(ctx context.Context, query ReceiveMessagesQuery) (ReceiveMessagesResult, error) {
+	if s.Lister == nil {
+		return ReceiveMessagesResult{}, fmt.Errorf("msglib message source requires a lister")
+	}
+	result, err := s.Lister.ListMessages(ctx, msglib.ListMessagesOptions{
+		ConversationID:            query.ConversationID,
+		ConversationType:          "auto",
+		Query:                     query.Query,
+		Since:                     query.Since,
+		Limit:                     query.Limit,
+		IncludeBody:               s.IncludeBody,
+		IncludeAttachmentMetadata: s.IncludeAttachmentMetadata,
+	})
+	if err != nil {
+		return ReceiveMessagesResult{}, err
+	}
+	if !result.ReadOnly {
+		return ReceiveMessagesResult{}, fmt.Errorf("msglib list_messages did not report read_only=true")
+	}
+	if result.RawRowsReturned {
+		return ReceiveMessagesResult{}, fmt.Errorf("msglib list_messages returned raw rows")
+	}
+	if result.FilePathsReturned {
+		return ReceiveMessagesResult{}, fmt.Errorf("msglib list_messages returned file path values")
+	}
+
+	messages := make([]Message, 0, len(result.Messages))
+	for _, item := range result.Messages {
+		messages = append(messages, msgLibListMessageToReceiveMessage(item))
+	}
+	return ReceiveMessagesResult{Messages: messages}, nil
+}
+
+func msgLibListMessageToReceiveMessage(item msglib.ListMessage) Message {
+	return Message{
+		ID:               firstNonEmpty(item.ID, item.MessageID),
+		ConversationID:   item.ConversationID,
+		ConversationType: item.ConversationType,
+		SenderID:         item.SenderID,
+		ReceiverID:       item.ReceiverID,
+		Text:             firstNonEmpty(item.ContentText, item.Text),
+		Timestamp:        firstNonEmpty(item.Timestamp, item.CreatedAt),
+		Subject:          item.Subject,
+		Read:             item.Read,
+		Source:           firstNonEmpty(item.Source, "local_readonly"),
+		RawRef:           item.RawRef,
+		Attachments:      msgLibAttachmentsToReceiveAttachments(item.Attachments),
+	}
+}
+
+func msgLibAttachmentsToReceiveAttachments(items []msglib.ListMessageAttachment) []MessageAttachment {
+	if len(items) == 0 {
+		return nil
+	}
+	attachments := make([]MessageAttachment, 0, len(items))
+	for _, item := range items {
+		attachment := MessageAttachment{
+			FileID:      item.FileID,
+			FileName:    item.FileName,
+			DownloadRef: item.DownloadRef,
+		}
+		if item.SizeBytes > 0 {
+			size := item.SizeBytes
+			attachment.SizeBytes = &size
+		}
+		attachments = append(attachments, attachment)
+	}
+	return attachments
+}
+
+func firstNonEmpty(values ...string) string {
+	for _, value := range values {
+		if strings.TrimSpace(value) != "" {
+			return value
+		}
+	}
+	return ""
+}

internal/isphere/msglib_source_test.go

@@ -0,0 +1,98 @@
+package isphere
+
+import (
+	"context"
+	"testing"
+
+	"isphere-ai-bridge/internal/msglib"
+)
+
+func TestMsgLibMessageSourceMapsListMessagesToReceiveMessages(t *testing.T) {
+	fake := &fakeMsgLibMessageLister{
+		result: msglib.ListMessagesResult{
+			ReadOnly:                  true,
+			MessageBodyValuesReturned: true,
+			RawRowsReturned:           false,
+			FilePathsReturned:         false,
+			SourceTables:              []string{"tblMsgGroupPersonMsg"},
+			Messages: []msglib.ListMessage{{
+				MessageID:        "db-msg-1",
+				ID:               "db-msg-1",
+				ConversationID:   "group-redacted",
+				ConversationType: "group",
+				SenderID:         "sender-redacted",
+				SenderName:       "Sender Redacted",
+				ReceiverID:       "",
+				Text:             "redacted body",
+				ContentText:      "redacted body",
+				ContentType:      "file",
+				Timestamp:        "1783423807000",
+				CreatedAt:        "2026-07-10T00:00:00Z",
+				Subject:          "redacted subject",
+				Read:             true,
+				Source:           "local_readonly",
+				RawRef:           "msglib:tblMsgGroupPersonMsg",
+				Attachments: []msglib.ListMessageAttachment{{
+					FileID:      "file-redacted-1",
+					FileName:    "redacted.docx",
+					SizeBytes:   1234,
+					DownloadRef: "",
+				}},
+			}},
+		},
+	}
+	source := MsgLibMessageSource{
+		Lister:                    fake,
+		IncludeBody:               true,
+		IncludeAttachmentMetadata: true,
+	}
+
+	got, err := source.ReceiveMessages(context.Background(), ReceiveMessagesQuery{
+		ConversationID: "group-redacted",
+		Query:          "redacted",
+		Since:          "2026-07-10T00:00:00Z",
+		Limit:          5,
+	})
+	if err != nil {
+		t.Fatalf("ReceiveMessages returned error: %v", err)
+	}
+	if len(fake.calls) != 1 {
+		t.Fatalf("ListMessages calls = %d, want 1", len(fake.calls))
+	}
+	call := fake.calls[0]
+	if call.ConversationID != "group-redacted" || call.Query != "redacted" || call.Since != "2026-07-10T00:00:00Z" || call.Limit != 5 {
+		t.Fatalf("ListMessages options = %+v", call)
+	}
+	if !call.IncludeBody || !call.IncludeAttachmentMetadata {
+		t.Fatalf("ListMessages include flags = body:%v attachments:%v", call.IncludeBody, call.IncludeAttachmentMetadata)
+	}
+	if len(got.Messages) != 1 {
+		t.Fatalf("messages = %+v, want one", got.Messages)
+	}
+	msg := got.Messages[0]
+	if msg.ID != "db-msg-1" || msg.ConversationID != "group-redacted" || msg.ConversationType != "group" {
+		t.Fatalf("unexpected message identity: %+v", msg)
+	}
+	if msg.SenderID != "sender-redacted" || msg.ReceiverID != "" || msg.Text != "redacted body" || msg.Subject != "redacted subject" || !msg.Read {
+		t.Fatalf("unexpected message fields: %+v", msg)
+	}
+	if msg.Source != "local_readonly" || msg.RawRef != "msglib:tblMsgGroupPersonMsg" {
+		t.Fatalf("source refs = %q/%q", msg.Source, msg.RawRef)
+	}
+	if len(msg.Attachments) != 1 || msg.Attachments[0].FileName != "redacted.docx" || msg.Attachments[0].DownloadRef != "" {
+		t.Fatalf("attachments = %+v", msg.Attachments)
+	}
+	if msg.Attachments[0].SizeBytes == nil || *msg.Attachments[0].SizeBytes != 1234 {
+		t.Fatalf("attachment size = %+v", msg.Attachments[0].SizeBytes)
+	}
+}
+
+type fakeMsgLibMessageLister struct {
+	calls  []msglib.ListMessagesOptions
+	result msglib.ListMessagesResult
+}
+
+func (f *fakeMsgLibMessageLister) ListMessages(_ context.Context, opts msglib.ListMessagesOptions) (msglib.ListMessagesResult, error) {
+	f.calls = append(f.calls, opts)
+	return f.result, nil
+}

internal/isphere/source.go

@@ -22,6 +22,16 @@ type Message struct {
 	Subject          string
 	ReceiptID        string
 	Read             bool
+	Source           string
+	RawRef           string
+	Attachments      []MessageAttachment
+}
+
+type MessageAttachment struct {
+	FileID      string
+	FileName    string
+	SizeBytes   *int64
+	DownloadRef string
 }
 
 type ReceiveMessagesQuery struct {