WIP: buffers and command history [ci skip]

ui/buffer.go

@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"bufio"
 	"fmt"
 	"os"
 	"path"
@@ -19,6 +20,7 @@ const (
 
 // BufferHandler is the concrete functionality of a Buffer.
 type BufferHandler interface {
+	open(m *model) error                      // gracefully open a new buffer
 	validate(m model, input string) error     // validate incoming input
 	handle(input, hiddenInput string) tea.Msg // handle and dispatch messages from input
 	persist(m *model, input string)           // store buffer input for persistence
@@ -43,6 +45,31 @@ type Buffer struct {
 // the status of ACN connectivity.
 type StatusBufferHandler Buffer
 
+func (s StatusBufferHandler) open(m *model) error {
+	buffer := m.buffers[m.menuState]
+	cairdeLogsDir := path.Join(m.userDir, "logs")
+	bufferLogsPath := path.Join(cairdeLogsDir, buffer.name)
+
+	f, err := os.OpenFile(bufferLogsPath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0664)
+	if err != nil {
+		return fmt.Errorf("unable to create/open file %s: %s", bufferLogsPath, err)
+	}
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		buffer.inputHistory = append(buffer.inputHistory, scanner.Text())
+	}
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("unable to read lines from %s : %s", bufferLogsPath, err)
+	}
+
+	if err := f.Close(); err != nil {
+		return fmt.Errorf("unable to close %s file handler: %s", bufferLogsPath, err)
+	}
+
+	return nil
+}
+
 func (s StatusBufferHandler) validate(m model, input string) error {
 	if string(input[0]) != "/" {
 		return fmt.Errorf("Woops, this is not a chat buffer. Only commands are allowed")

ui/model.go

@@ -171,6 +171,7 @@ func (m model) Init() tea.Cmd {
 	return tea.Batch(
 		textinput.Blink,
 		m.receiveStatusCmd,
+		// TODO: open the buffers and return an error if that fails!
 	)
 }
 
@@ -225,6 +226,12 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	case tea.KeyMsg:
 		switch msg.String() {
+		case "up":
+			m.input.Reset()
+
+			lastCmd := m.statusBuffer.inputHistory[len(m.statusBuffer.inputHistory)-1]
+			m.statusBuffer.viewport.SetContent(lastCmd)
+
 		case "ctrl+c":
 			cmds = append(cmds, func() tea.Msg {
 				return turnAcnOff(&m, true)