Factor UI models out of the worker message package

Before, the information needed to display different parts of the UI was
tightly coupled to the specific messages being sent back and forth to
the backend worker. Separating out a models package allows us to be more
specific about exactly what a backend is able to and required to
provide for the UI.

3 files changed, 49 insertions, 30 deletions

diff --git a/worker/imap/fetch.go b/worker/imap/fetch.go
index 7d1bfcf..d5bb9aa 100644
--- a/worker/imap/fetch.go
+++ b/worker/imap/fetch.go
@@ -8,6 +8,7 @@ import (
 	"github.com/emersion/go-message/mail"
 	"github.com/emersion/go-message/textproto"
 
+	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/worker/types"
 )
 
@@ -82,39 +83,49 @@ func (imapw *IMAPWorker) handleFetchMessages(
 					header = &mail.Header{message.Header{textprotoHeader}}
 				}
 				imapw.worker.PostMessage(&types.MessageInfo{
-					Message:       types.RespondTo(msg),
-					BodyStructure: _msg.BodyStructure,
-					Envelope:      _msg.Envelope,
-					Flags:         _msg.Flags,
-					InternalDate:  _msg.InternalDate,
-					RFC822Headers: header,
-					Uid:           _msg.Uid,
+					Message: types.RespondTo(msg),
+					Info: &models.MessageInfo{
+						BodyStructure: _msg.BodyStructure,
+						Envelope:      _msg.Envelope,
+						Flags:         _msg.Flags,
+						InternalDate:  _msg.InternalDate,
+						RFC822Headers: header,
+						Uid:           _msg.Uid,
+					},
 				}, nil)
 			case *types.FetchFullMessages:
 				reader := _msg.GetBody(section)
 				imapw.worker.PostMessage(&types.FullMessage{
 					Message: types.RespondTo(msg),
-					Reader:  reader,
-					Uid:     _msg.Uid,
+					Content: &models.FullMessage{
+						Reader: reader,
+						Uid:    _msg.Uid,
+					},
 				}, nil)
 				// Update flags (to mark message as read)
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
-					Flags:   _msg.Flags,
-					Uid:     _msg.Uid,
+					Info: &models.MessageInfo{
+						Flags: _msg.Flags,
+						Uid:   _msg.Uid,
+					},
 				}, nil)
 			case *types.FetchMessageBodyPart:
 				reader := _msg.GetBody(section)
 				imapw.worker.PostMessage(&types.MessageBodyPart{
 					Message: types.RespondTo(msg),
-					Reader:  reader,
-					Uid:     _msg.Uid,
+					Part: &models.MessageBodyPart{
+						Reader: reader,
+						Uid:    _msg.Uid,
+					},
 				}, nil)
 				// Update flags (to mark message as read)
 				imapw.worker.PostMessage(&types.MessageInfo{
 					Message: types.RespondTo(msg),
-					Flags:   _msg.Flags,
-					Uid:     _msg.Uid,
+					Info: &models.MessageInfo{
+						Flags: _msg.Flags,
+						Uid:   _msg.Uid,
+					},
 				}, nil)
 			}
 		}
diff --git a/worker/imap/list.go b/worker/imap/list.go
index 708e70f..42be50e 100644
--- a/worker/imap/list.go
+++ b/worker/imap/list.go
@@ -3,6 +3,7 @@ package imap
 import (
 	"github.com/emersion/go-imap"
 
+	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/worker/types"
 )
 
@@ -18,9 +19,11 @@ func (imapw *IMAPWorker) handleListDirectories(msg *types.ListDirectories) {
 				continue
 			}
 			imapw.worker.PostMessage(&types.Directory{
-				Message:    types.RespondTo(msg),
-				Name:       mbox.Name,
-				Attributes: mbox.Attributes,
+				Message: types.RespondTo(msg),
+				Dir: &models.Directory{
+					Name:       mbox.Name,
+					Attributes: mbox.Attributes,
+				},
 			}, nil)
 		}
 		done <- nil
diff --git a/worker/imap/worker.go b/worker/imap/worker.go
index 5005620..9ddaa47 100644
--- a/worker/imap/worker.go
+++ b/worker/imap/worker.go
@@ -10,6 +10,7 @@ import (
 	idle "github.com/emersion/go-imap-idle"
 	"github.com/emersion/go-imap/client"
 
+	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/worker/types"
 )
 
@@ -169,13 +170,15 @@ func (w *IMAPWorker) handleImapUpdate(update client.Update) {
 			w.selected = *status
 		}
 		w.worker.PostMessage(&types.DirectoryInfo{
-			Flags:    status.Flags,
-			Name:     status.Name,
-			ReadOnly: status.ReadOnly,
-
-			Exists: int(status.Messages),
-			Recent: int(status.Recent),
-			Unseen: int(status.Unseen),
+			Info: &models.DirectoryInfo{
+				Flags:    status.Flags,
+				Name:     status.Name,
+				ReadOnly: status.ReadOnly,
+
+				Exists: int(status.Messages),
+				Recent: int(status.Recent),
+				Unseen: int(status.Unseen),
+			},
 		}, nil)
 	case *client.MessageUpdate:
 		msg := update.Message
@@ -183,11 +186,13 @@ func (w *IMAPWorker) handleImapUpdate(update client.Update) {
 			msg.Uid = w.seqMap[msg.SeqNum-1]
 		}
 		w.worker.PostMessage(&types.MessageInfo{
-			BodyStructure: msg.BodyStructure,
-			Envelope:      msg.Envelope,
-			Flags:         msg.Flags,
-			InternalDate:  msg.InternalDate,
-			Uid:           msg.Uid,
+			Info: &models.MessageInfo{
+				BodyStructure: msg.BodyStructure,
+				Envelope:      msg.Envelope,
+				Flags:         msg.Flags,
+				InternalDate:  msg.InternalDate,
+				Uid:           msg.Uid,
+			},
 		}, nil)
 	case *client.ExpungeUpdate:
 		i := update.SeqNum - 1