Send stored images to WhatsApp chats

[onechat] / terminal.go

diff --git a/terminal.go b/terminal.go
index eff009cd9f7e225f45e96b72f8e72e3f79f20eca..da0d78aa4fb6c95160ed1f42fb77631820a426d2 100644 (file)
--- a/terminal.go
+++ b/terminal.go
@@ -10,6 +10,8 @@ import (
        "net"
        "path/filepath"
        "strings"
+
+       "golang.org/x/sys/unix"
 )
 
 // terminalResultLines is the most lines of a tool result that the client shows.
@@ -21,9 +23,10 @@ var errTerminalDaemonClosed = errors.New("the daemon closed the connection")
 // terminal runs "onechat" and "onechat chat": the terminal client of the
 // daemon. Each line of input is a user message, the line /stop interrupts the
 // running turn, the line /stop NAME stops the subagent NAME, and a line that
-// starts with /whatsapp is a WhatsApp command. The client shows the replies,
-// the tool calls, and their results as they happen. It ends at the end of the
-// input or when the daemon closes the connection.
+// starts with /whatsapp is a WhatsApp command. /image PATH [caption] sends an
+// image from the client working directory. The client shows the replies, the
+// tool calls, and their results as they happen. It ends at the end of the input
+// or when the daemon closes the connection.
 func terminal(ctx context.Context, in io.Reader, out io.Writer) error {
        dir, err := dataDir()
        if err != nil {
@@ -37,6 +40,7 @@ func terminal(ctx context.Context, in io.Reader, out io.Writer) error {
        }
 
        var dialer net.Dialer
+
        conn, err := dialer.DialContext(ctx, "unix", path)
        if err != nil {
                return fmt.Errorf(`connect to the daemon (start it with "onechat daemon"): %w`, err)
@@ -60,14 +64,17 @@ func terminalSession(ctx context.Context, conn net.Conn, in io.Reader, out io.Wr
        }()
 
        var err error
+
        select {
        case err = <-sent:
                err = errors.Join(err, conn.Close())
+
                <-shown
        case err = <-shown:
                err = errors.Join(terminalCmpError(err, errTerminalDaemonClosed), conn.Close())
        case <-ctx.Done():
                err = conn.Close()
+
                <-shown
        }
 
@@ -83,6 +90,7 @@ func terminalSendLines(ctx context.Context, conn net.Conn, in io.Reader) error {
        encoder := json.NewEncoder(conn)
        scanner := bufio.NewScanner(in)
        scanner.Buffer(make([]byte, 64*1024), socketRequestBytes)
+
        for ctx.Err() == nil && scanner.Scan() {
                line := scanner.Text()
                request := SocketRequest{
@@ -92,6 +100,7 @@ func terminalSendLines(ctx context.Context, conn net.Conn, in io.Reader) error {
 
                name, stop := stopSubagentName(line)
                args, whatsapp := whatsappCommandArgs(line)
+               image, isImage := terminalImageRequest(line)
                switch {
                case strings.TrimSpace(line) == "":
                        continue
@@ -104,6 +113,16 @@ func terminalSendLines(ctx context.Context, conn net.Conn, in io.Reader) error {
                                Type: "stop",
                                Text: name,
                        }
+               case isImage:
+                       request = image
+                       if request.Path != "" {
+                               var err error
+
+                               request.Path, err = filepath.Abs(request.Path)
+                               if err != nil {
+                                       return fmt.Errorf("find terminal image path: %w", err)
+                               }
+                       }
                case whatsapp:
                        request = SocketRequest{
                                Type: "whatsapp",
@@ -126,12 +145,17 @@ func terminalSendLines(ctx context.Context, conn net.Conn, in io.Reader) error {
 }
 
 // terminalShowEvents writes each event from the daemon to out until the
-// connection closes.
+// connection closes. Only replies and work messages use Markdown styles, and
+// only when out is a terminal. Terminal output ends each shown idle event with
+// an input prompt and clears that prompt before the next shown event.
 func terminalShowEvents(conn net.Conn, out io.Writer) error {
+       busy, prompt := false, false
        scanner := bufio.NewScanner(conn)
        scanner.Buffer(make([]byte, 64*1024), socketRequestBytes)
+
        for scanner.Scan() {
                var event Event
+
                err := json.Unmarshal(scanner.Bytes(), &event)
                if err != nil {
                        return fmt.Errorf("decode event: %w", err)
@@ -142,7 +166,29 @@ func terminalShowEvents(conn net.Conn, out io.Writer) error {
                        continue
                }
 
-               _, err = io.WriteString(out, text+"\n")
+               columns := terminalColumns(out)
+               if columns > 0 && (event.Kind == "reply" || event.Kind == "work") {
+                       text = strings.Join(terminalMarkdown(text, columns), "\n")
+               }
+
+               switch event.Kind {
+               case "busy":
+                       busy = true
+               case "idle":
+                       busy = false
+               }
+
+               text += "\n"
+               if prompt {
+                       text = "\r\x1b[2K" + text
+               }
+
+               prompt = columns > 0 && !busy
+               if prompt {
+                       text += "> "
+               }
+
+               _, err = io.WriteString(out, text)
                if err != nil {
                        return fmt.Errorf("write terminal event: %w", err)
                }
@@ -203,6 +249,26 @@ func terminalEventText(event Event) string {
        }
 }
 
+// terminalColumns returns the current terminal width, or zero for other output.
+// A terminal that reports no columns uses 80.
+func terminalColumns(out io.Writer) int {
+       file, ok := out.(interface{ Fd() uintptr })
+       if !ok {
+               return 0
+       }
+
+       size, err := unix.IoctlGetWinsize(int(file.Fd()), unix.TIOCGWINSZ)
+       if err != nil {
+               return 0
+       }
+
+       if size.Col == 0 {
+               return 80
+       }
+
+       return int(size.Col)
+}
+
 // terminalFirstLines returns the first count lines of text, with the number of
 // the lines left out.
 func terminalFirstLines(text string, count int) string {