From 62dbcbfc953a36202d96466563a8e71b8bd4ff65 Mon Sep 17 00:00:00 2001
From: "James A. Jerkins" <evergreen@jamesjerkinscomputer.com>
Date: Sat, 30 Oct 2021 13:02:39 -0500
Subject: Connect and bond with a passkey

This commit adds the following:
    Passkey pairing - passkey is displayed on watch
    Swipe down to clear passkey screen
    Connection encryption
    Connection bonding
    Automatic reconnects to a bonded peripheral
    Trusted device on Android

Note that persisting the bond between reboots is NOT included in
this commit. Therefore, rebooting the watch will cause reconnect failures.
You must delete the bond from the phone to reconnect/pair.
---
 src/displayapp/Apps.h              |  1 +
 src/displayapp/DisplayApp.cpp      |  9 +++++++++
 src/displayapp/Messages.h          |  1 +
 src/displayapp/screens/PassKey.cpp | 17 +++++++++++++++++
 src/displayapp/screens/PassKey.h   | 20 ++++++++++++++++++++
 5 files changed, 48 insertions(+)
 create mode 100644 src/displayapp/screens/PassKey.cpp
 create mode 100644 src/displayapp/screens/PassKey.h

(limited to 'src/displayapp')

diff --git a/src/displayapp/Apps.h b/src/displayapp/Apps.h
index d340efee..935a61a1 100644
--- a/src/displayapp/Apps.h
+++ b/src/displayapp/Apps.h
@@ -25,6 +25,7 @@ namespace Pinetime {
       Metronome,
       Motion,
       Steps,
+      PassKey,
       QuickSettings,
       Settings,
       SettingWatchFace,
diff --git a/src/displayapp/DisplayApp.cpp b/src/displayapp/DisplayApp.cpp
index 80155187..08a76467 100644
--- a/src/displayapp/DisplayApp.cpp
+++ b/src/displayapp/DisplayApp.cpp
@@ -29,6 +29,7 @@
 #include "displayapp/screens/FlashLight.h"
 #include "displayapp/screens/BatteryInfo.h"
 #include "displayapp/screens/Steps.h"
+#include "displayapp/screens/PassKey.h"
 #include "displayapp/screens/Error.h"
 
 #include "drivers/Cst816s.h"
@@ -288,6 +289,9 @@ void DisplayApp::Refresh() {
         // Added to remove warning
         // What should happen here?
         break;
+      case Messages::ShowPairingKey:
+        LoadApp(Apps::PassKey, DisplayApp::FullRefreshDirections::Up);
+        break;
     }
   }
 
@@ -351,6 +355,11 @@ void DisplayApp::LoadApp(Apps app, DisplayApp::FullRefreshDirections direction)
       ReturnApp(Apps::Clock, FullRefreshDirections::Down, TouchEvents::None);
       break;
 
+    case Apps::PassKey:
+      currentScreen = std::make_unique<Screens::PassKey>(this, bleController.GetPairingKey());
+      ReturnApp(Apps::Clock, FullRefreshDirections::Down, TouchEvents::SwipeDown);
+      break;
+
     case Apps::Notifications:
       currentScreen = std::make_unique<Screens::Notifications>(
         this, notificationManager, systemTask->nimble().alertService(), motorController, Screens::Notifications::Modes::Normal);
diff --git a/src/displayapp/Messages.h b/src/displayapp/Messages.h
index 29e09eb3..b22d6c3c 100644
--- a/src/displayapp/Messages.h
+++ b/src/displayapp/Messages.h
@@ -19,6 +19,7 @@ namespace Pinetime {
         UpdateTimeOut,
         DimScreen,
         RestoreBrightness,
+        ShowPairingKey,
         AlarmTriggered
       };
     }
diff --git a/src/displayapp/screens/PassKey.cpp b/src/displayapp/screens/PassKey.cpp
new file mode 100644
index 00000000..66bf0c24
--- /dev/null
+++ b/src/displayapp/screens/PassKey.cpp
@@ -0,0 +1,17 @@
+#include "PassKey.h"
+#include "displayapp/DisplayApp.h"
+
+using namespace Pinetime::Applications::Screens;
+
+PassKey::PassKey(Pinetime::Applications::DisplayApp* app, uint32_t key) : Screen(app) {
+  lpasskey = lv_label_create(lv_scr_act(), nullptr);
+  lv_obj_set_style_local_text_color(lpasskey, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, lv_color_hex(0xFFFF00));
+  lv_obj_set_style_local_text_font(lpasskey, LV_LABEL_PART_MAIN, LV_STATE_DEFAULT, &jetbrains_mono_42);
+  lv_label_set_text_fmt(lpasskey, "%06u", key);
+  lv_obj_align(lpasskey, nullptr, LV_ALIGN_CENTER, 0, -20);
+}
+
+PassKey::~PassKey() {
+  lv_obj_clean(lv_scr_act());
+}
+
diff --git a/src/displayapp/screens/PassKey.h b/src/displayapp/screens/PassKey.h
new file mode 100644
index 00000000..34e0d593
--- /dev/null
+++ b/src/displayapp/screens/PassKey.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include "Screen.h"
+#include <lvgl/lvgl.h>
+
+namespace Pinetime {
+  namespace Applications {
+    namespace Screens {
+
+      class PassKey : public Screen {
+      public:
+        PassKey(DisplayApp* app, uint32_t key);
+        ~PassKey() override;
+
+      private:
+        lv_obj_t* lpasskey;
+      };
+    }
+  }
+}
-- 
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