feat: TUI main selection screen with checkboxes, menu items, revoke hotkey

openvpncertupdate.py

@@ -599,6 +599,153 @@ def show_cert_form(
         fields[active[focus]].handle_key(key)
 
 
+# ============================================================
+# === TUI SCREEN ===
+# ============================================================
+
+
+class Action(Enum):
+    RENEW_SELECTED = auto()
+    NEW_CERT       = auto()
+    REGEN_CRL      = auto()
+    REVOKE         = auto()
+    EXIT           = auto()
+
+
+@dataclass
+class ScreenResult:
+    action: Action
+    selected_cns: list[str] = field(default_factory=list)
+
+
+_MENU_NEW  = "Create New Certificate"
+_MENU_CRL  = "Regenerate CRL"
+_MENU_EXIT = "Exit"
+_MENU_ITEMS = [_MENU_NEW, _MENU_CRL, _MENU_EXIT]
+
+
+def _expiry_label(c: CertInfo) -> str:
+    if c.days_left < 0:
+        return f"[EXPIRED {abs(c.days_left)}d ago]"
+    if c.days_left == 0:
+        return "[EXPIRES TODAY!]"
+    return f"[exp in {c.days_left}d]  "
+
+
+def show_main_screen(stdscr, certs: list[CertInfo]) -> ScreenResult:
+    """Display cert selection list. Returns when user activates an action."""
+    init_colors()
+    curses.curs_set(0)
+
+    n_certs  = len(certs)
+    n_items  = n_certs + len(_MENU_ITEMS)
+    checked: set[str] = set()
+    cursor = 0
+
+    def is_cert(idx):  return idx < n_certs
+    def menu_item(idx): return _MENU_ITEMS[idx - n_certs] if idx >= n_certs else None
+
+    def draw():
+        stdscr.clear()
+        sh, sw = stdscr.getmaxyx()
+
+        # Header bar
+        hdr = " openvpncertupdate — VPN Certificate Manager "
+        try:
+            stdscr.addstr(0, 0, hdr.ljust(sw)[:sw],
+                          curses.color_pair(COLOR_TITLE) | curses.A_BOLD)
+        except curses.error:
+            pass
+
+        # Footer hint
+        hint = " ↑↓:Navigate  Space:Check  Enter:Confirm  R:Revoke  Q:Quit"
+        try:
+            stdscr.addstr(sh - 1, 0, hint[:sw], curses.color_pair(COLOR_DISABLED))
+        except curses.error:
+            pass
+
+        list_h = sh - 2
+        scroll = clamp(cursor - list_h // 2, 0, max(0, n_items - list_h))
+        row_y  = 1
+
+        for i in range(scroll, min(scroll + list_h, n_items)):
+            if row_y >= sh - 1:
+                break
+            is_cur   = (i == cursor)
+            sel_attr = curses.color_pair(COLOR_SELECTED if is_cur else COLOR_NORMAL)
+
+            if is_cert(i):
+                cert = certs[i]
+                box  = "[X]" if cert.cn in checked else "[ ]"
+                lbl  = _expiry_label(cert)
+                line = f"  {box} {lbl:<18} {cert.cn}"
+                try:
+                    stdscr.addstr(row_y, 0, line.ljust(sw - 1)[:sw - 1], sel_attr)
+                except curses.error:
+                    pass
+            else:
+                item      = menu_item(i)
+                any_check = bool(checked)
+                if item == _MENU_NEW and any_check:
+                    notice = "  ← clear all checkboxes to use"
+                    line   = f"  {item}{notice}"
+                    attr   = curses.color_pair(COLOR_SELECTED if is_cur else COLOR_DISABLED)
+                else:
+                    line = f"  {item}"
+                    attr = sel_attr
+                try:
+                    stdscr.addstr(row_y, 0, line.ljust(sw - 1)[:sw - 1], attr)
+                except curses.error:
+                    pass
+            row_y += 1
+
+        stdscr.refresh()
+
+    while True:
+        draw()
+        key = stdscr.getch()
+
+        if key in (ord("q"), ord("Q")):
+            return ScreenResult(action=Action.EXIT)
+
+        elif key == curses.KEY_UP:
+            cursor = clamp(cursor - 1, 0, n_items - 1)
+
+        elif key == curses.KEY_DOWN:
+            cursor = clamp(cursor + 1, 0, n_items - 1)
+
+        elif key == ord(" ") and is_cert(cursor):
+            cn = certs[cursor].cn
+            if cn in checked:
+                checked.discard(cn)
+            else:
+                checked.add(cn)
+
+        elif key in (10, 13, curses.KEY_ENTER):
+            if is_cert(cursor):
+                # Enter on a cert row: add to selection and confirm immediately
+                checked.add(certs[cursor].cn)
+                return ScreenResult(action=Action.RENEW_SELECTED,
+                                    selected_cns=sorted(checked))
+            else:
+                item = menu_item(cursor)
+                if item == _MENU_NEW and not checked:
+                    return ScreenResult(action=Action.NEW_CERT)
+                elif item == _MENU_CRL:
+                    return ScreenResult(action=Action.REGEN_CRL)
+                elif item == _MENU_EXIT:
+                    return ScreenResult(action=Action.EXIT)
+                # _MENU_NEW when checked → grayed, ignore
+
+        elif key in (ord("r"), ord("R")) and is_cert(cursor):
+            cert = certs[cursor]
+            if show_confirm(
+                stdscr,
+                f"Revoke certificate for:\n  CN: {cert.cn}\n\nThis cannot be undone.",
+            ):
+                return ScreenResult(action=Action.REVOKE, selected_cns=[cert.cn])
+
+
 # (remaining sections added in later tasks)
 # ============================================================