Implemented remembering messages in frequencies

internal/client/ui/core/chat/chat.go

@@ -1,6 +1,7 @@
 package chat
 
 import (
+	"log"
 	"strconv"
 	"strings"
 	"time"
@@ -337,20 +338,55 @@ func (m *Model) sendMessage() tea.Cmd {
 // }
 
 func (m *Model) SetReceiver(receiverIndex int) {
-	if m.receiverIndex == nil || *m.receiverIndex != receiverIndex {
-		m.index = -1
+	if m.receiverIndex != nil && *m.receiverIndex == receiverIndex {
+		return
 	}
+	m.ResetBeforeSwitch()
 	m.receiverIndex = &receiverIndex
 	m.frequencyIndex = nil
+	m.RestoreAfterSwitch()
 }
 
 func (m *Model) SetFrequency(networkIndex, frequencyIndex int) {
-	if m.frequencyIndex == nil || *m.frequencyIndex != frequencyIndex {
-		m.index = -1
+	if m.frequencyIndex != nil && *m.frequencyIndex == frequencyIndex {
+		return
 	}
+	m.ResetBeforeSwitch()
 	m.receiverIndex = nil
 	m.frequencyIndex = &frequencyIndex
 	m.networkIndex = networkIndex
+	m.RestoreAfterSwitch()
+}
+
+func (m *Model) ResetBeforeSwitch() {
+	source := m.frequencyIndex
+	if source == nil {
+		source = m.receiverIndex
+	}
+	if source == nil {
+		return
+	}
+
+	log.Println("Resetting", source)
+	state.State.IncompleteMessages[snowflake.ID(*source)] = m.vi.String()
+	m.vi.Reset()
+	m.index = -1
+}
+
+func (m *Model) RestoreAfterSwitch() {
+	source := m.frequencyIndex
+	if source == nil {
+		source = m.receiverIndex
+	}
+	if source == nil {
+		return
+	}
+
+	log.Println("Restoring", source)
+	msgs := state.State.IncompleteMessages
+	if val, ok := msgs[snowflake.ID(*source)]; ok {
+		m.vi.SetString(val)
+	}
 }
 
 func (m *Model) renderMessage(message data.Message, builder *strings.Builder, header bool) int {

internal/client/ui/core/state/state.go

@@ -8,11 +8,15 @@ import (
 )
 
 type state struct {
+	// Key is either a frequency or receiver
+	IncompleteMessages map[snowflake.ID]string
+
 	Messages map[snowflake.ID]*btree.BTreeG[data.Message]
-	Networks     []packet.FullNetwork
+	Networks []packet.FullNetwork
 }
 
 var State state = state{
-	Networks: []packet.FullNetwork{},
-	Messages: map[snowflake.ID]*btree.BTreeG[data.Message]{},
+	Messages:           map[snowflake.ID]*btree.BTreeG[data.Message]{},
+	Networks:           []packet.FullNetwork{},
+	IncompleteMessages: map[snowflake.ID]string{},
 }

internal/client/ui/viminput/viminput.go

@@ -341,14 +341,6 @@ func (m *Model) Blur() {
 	m.focus = false
 }
 
-func (m *Model) SetLines(lines ...[]rune) {
-	m.lines = lines
-}
-
-func (m *Model) Lines() [][]rune {
-	return m.lines
-}
-
 func (m *Model) SetCursorColumn(col int) {
 	if len(m.lines[m.cursorLine]) == 0 {
 		m.cursorColumn = 0
@@ -2021,6 +2013,18 @@ func (m *Model) String() string {
 	return message
 }
 
+func (m *Model) SetString(s string) {
+	m.lines = [][]rune{[]rune("")}
+	i := 0
+	for _, c := range s {
+		if c == '\n' {
+			m.lines = append(m.lines, []rune(""))
+		} else {
+			m.lines[i] = append(m.lines[i], c)
+		}
+	}
+}
+
 func (m *Model) Reset() {
 	m.lines = [][]rune{[]rune("")}
 	m.undoStack = []State{{[][]rune{[]rune("")}, 0, 0}}