patch/list: add list sub-cmd

Implement the :patch list command. List the the current project and add
a flag to list all saved projects. Use the pager to display the data and
extract the pager commands and move them into the config package.

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 113 insertions, 0 deletions

diff --git a/commands/patch/list.go b/commands/patch/list.go
new file mode 100644
index 00000000..6dcc06e8
--- /dev/null
+++ b/commands/patch/list.go
@@ -0,0 +1,113 @@
+package patch
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os/exec"
+	"time"
+
+	"git.sr.ht/~rjarry/aerc/app"
+	"git.sr.ht/~rjarry/aerc/config"
+	"git.sr.ht/~rjarry/aerc/lib/pama"
+	"git.sr.ht/~rjarry/aerc/lib/pama/models"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
+	"git.sr.ht/~rjarry/go-opt"
+	"github.com/gdamore/tcell/v2"
+)
+
+type List struct {
+	All bool `opt:"-a"`
+}
+
+func init() {
+	register(List{})
+}
+
+func (List) Aliases() []string {
+	return []string{"list", "ls"}
+}
+
+func (l List) Execute(args []string) error {
+	m := pama.New()
+	current, err := m.CurrentProject()
+	if err != nil {
+		return err
+	}
+
+	projects := []models.Project{current}
+	if l.All {
+		projects, err = m.Projects("")
+		if err != nil {
+			return err
+		}
+	}
+
+	app.PushStatus(fmt.Sprintf("Current project: %s", current.Name), 30*time.Second)
+
+	createWidget := func(r io.Reader) (ui.DrawableInteractive, error) {
+		pagerCmd, err := app.CmdFallbackSearch(config.PagerCmds(), true)
+		if err != nil {
+			return nil, err
+		}
+
+		cmd := opt.SplitArgs(pagerCmd)
+		pager := exec.Command(cmd[0], cmd[1:]...)
+		pager.Stdin = r
+
+		term, err := app.NewTerminal(pager)
+		if err != nil {
+			return nil, err
+		}
+		start := time.Now()
+		term.OnClose = func(err error) {
+			if time.Since(start) > 250*time.Millisecond {
+				app.CloseDialog()
+				return
+			}
+			term.OnEvent = func(_ tcell.Event) bool {
+				app.CloseDialog()
+				return true
+			}
+		}
+		return term, nil
+	}
+
+	viewer, err := createWidget(m.NewReader(projects))
+	if err != nil {
+		viewer = app.NewListBox(
+			"Press <Esc> or <Enter> to close. "+
+				"Start typing to filter.",
+			numerify(m.NewReader(projects)), app.SelectedAccountUiConfig(),
+			func(_ string) { app.CloseDialog() },
+		)
+	}
+
+	app.AddDialog(app.NewDialog(
+		ui.NewBox(viewer, "Patch Management", "",
+			app.SelectedAccountUiConfig(),
+		),
+		// start pos on screen
+		func(h int) int {
+			return h / 8
+		},
+		// dialog height
+		func(h int) int {
+			return h - 2*h/8
+		},
+	))
+
+	return nil
+}
+
+func numerify(r io.Reader) []string {
+	var lines []string
+	nr := 1
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		s := scanner.Text()
+		lines = append(lines, fmt.Sprintf("%3d %s", nr, s))
+		nr++
+	}
+	return lines
+}