2 files changed, 87 insertions, 0 deletions
diff --git a/backend/notes/app.bsky.feed.post.go b/backend/notes/app.bsky.feed.post.go
new file mode 100644
index 0000000..21256be
--- /dev/null
+++ b/backend/notes/app.bsky.feed.post.go
@@ -0,0 +1,74 @@
+package notes
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+type AppBskyFeedPostNote struct {
+	URI          string
+	AuthorDID    string
+	AuthorHandle string
+	Text         string
+	CreatedAt    time.Time
+	ReplyTo      *string
+}
+
+type AppBskyFeedPostRecord struct {
+	URI   string `json:"uri"`
+	Value struct {
+		Text      string `json:"text"`
+		CreatedAt string `json:"createdAt"`
+		Reply     *struct {
+			Parent struct {
+				URI string `json:"uri"`
+			} `json:"parent"`
+		} `json:"reply,omitempty"`
+	} `json:"value"`
+}
+
+func (bp *AppBskyFeedPostNote) GetID() string {
+	return bp.URI
+}
+
+func (bp *AppBskyFeedPostNote) GetAuthorDID() string {
+	return bp.AuthorDID
+}
+
+func (bp *AppBskyFeedPostNote) GetAuthorHandle() string {
+	return bp.AuthorHandle
+}
+
+func (bp *AppBskyFeedPostNote) GetTimestamp() time.Time {
+	return bp.CreatedAt
+}
+
+func (bp *AppBskyFeedPostNote) GetReplyTo() *string {
+	return bp.ReplyTo
+}
+
+func AppBskyFeedPostFromRecord(record AppBskyFeedPostRecord) (*AppBskyFeedPostNote, error) {
+	createdAt, err := time.Parse(time.RFC3339, record.Value.CreatedAt)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse timestamp: %w", err)
+	}
+	if record.Value.Text == "" {
+		return nil, fmt.Errorf("missing required field: text")
+	}
+	if record.URI == "" {
+		return nil, fmt.Errorf("missing required field: uri")
+	}
+
+	parts := strings.Split(record.URI, "/") // at://DID/collection/rkey
+	did := parts[2]
+
+	return &AppBskyFeedPostNote{
+		URI:          record.URI,
+		AuthorDID:    did,
+		AuthorHandle: "author_handle", // wip
+		CreatedAt:    createdAt,
+		Text:         record.Value.Text,
+		ReplyTo:      &record.Value.Reply.Parent.URI,
+	}, nil
+}
diff --git a/backend/notes/note.go b/backend/notes/note.go
new file mode 100644
index 0000000..1d92948
--- /dev/null
+++ b/backend/notes/note.go
@@ -0,0 +1,13 @@
+package notes
+
+import (
+	"time"
+)
+
+type Note interface {
+	GetID() string
+	GetAuthorDID() string
+	GetAuthorHandle() string
+	GetTimestamp() time.Time
+	GetReplyTo() *string
+}