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 7d1bfcf1..d5bb9aaf 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 708e70fd..42be50e4 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 5005620f..9ddaa47e 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