commit 7c7ba85f8a932df5bc38a4dad1243871e8654dac
Author: Felix Pankratz <mail@felixpankratz.de>
Date:   Tue Sep 20 16:11:43 2022 +0200

    keyboard input

diff --git a/application.fam b/application.fam
new file mode 100644
index 0000000..4c042d4
--- /dev/null
+++ b/application.fam
@@ -0,0 +1,12 @@
+App(
+    appid="caesar_cipher",
+    name="Caesar Cipher",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="caesar_cipher_app",
+    cdefines=["APP_CAESAR_CIPHER"],
+    requires=[
+        "gui",
+    ],
+    stack_size=2 * 1024,
+    order=20,
+)
diff --git a/caesar_cipher.c b/caesar_cipher.c
new file mode 100644
index 0000000..1765de3
--- /dev/null
+++ b/caesar_cipher.c
@@ -0,0 +1,159 @@
+#include <furi.h>
+#include <input/input.h>
+#include <stdlib.h>
+
+#include <gui/gui.h>
+#include <gui/view.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/text_input.h>
+
+#define TEXT_BUFFER_SIZE 256
+
+typedef enum {
+    EventTypeTick,
+    EventTypeKey,
+} EventType;
+
+typedef struct {
+    EventType type;
+    InputEvent input;
+} PluginEvent;
+
+typedef struct {
+  ViewDispatcher* view_dispatcher;
+  TextInput* text_input;
+  char input[TEXT_BUFFER_SIZE];
+} CaesarState;
+
+//static void render_callback(Canvas* const canvas, void* ctx) {
+//    const CaesarState* caesar_state = acquire_mutex((ValueMutex*)ctx, 25);
+//    if(caesar_state == NULL) {
+//        return;
+//    }
+//    // border around the edge of the screen
+//    canvas_draw_frame(canvas, 0, 0, 128, 64);
+//
+//    canvas_set_font(canvas, FontPrimary);
+//
+//    release_mutex((ValueMutex*)ctx, caesar_state);
+//}
+
+//static void input_callback(InputEvent* input_event, FuriMessageQueue* event_queue) {
+//    furi_assert(event_queue);
+//
+//    PluginEvent event = {.type = EventTypeKey, .input = *input_event};
+//    furi_message_queue_put(event_queue, &event, FuriWaitForever);
+//}
+
+static void text_input_callback(void* ctx) {
+    const CaesarState* caesar_state = acquire_mutex((ValueMutex*)ctx, 25);
+    FURI_LOG_D("caesar_cipher", "Input text: %s", caesar_state->input);
+    release_mutex((ValueMutex*)ctx, caesar_state);
+}
+
+static void caesar_cipher_state_init(CaesarState* const caesar_state) {
+  caesar_state->view_dispatcher = view_dispatcher_alloc();
+  caesar_state->text_input = text_input_alloc();
+  // caesar_state->input = ""; - this is not python 
+}
+
+static void caesar_cipher_state_free(CaesarState* const caesar_state) {
+  text_input_free(caesar_state->text_input);
+  view_dispatcher_remove_view(caesar_state->view_dispatcher, 0);
+  view_dispatcher_free(caesar_state->view_dispatcher);
+  free(caesar_state);
+}
+
+int32_t caesar_cipher_app() {
+    FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(PluginEvent));
+
+    CaesarState* caesar_state = malloc(sizeof(CaesarState));
+    
+    FURI_LOG_D("caesar_cipher", "Running caesar_cipher_state_init");
+    caesar_cipher_state_init(caesar_state);
+
+    ValueMutex state_mutex;
+    if(!init_mutex(&state_mutex, caesar_state, sizeof(CaesarState))) {
+        FURI_LOG_E("caesar_cipher", "cannot create mutex\r\n");
+        free(caesar_state);
+        return 255;
+    }
+
+    // Set system callbacks
+    //ViewPort* view_port = view_port_alloc();
+    //view_port_draw_callback_set(view_port, render_callback, &state_mutex);
+    //view_port_input_callback_set(view_port, input_callback, event_queue);
+
+    FURI_LOG_D("caesar_cipher", "Assigning text input callback");
+    text_input_set_result_callback(
+        caesar_state->text_input,
+        text_input_callback,
+        &state_mutex,
+        caesar_state->input,
+        TEXT_BUFFER_SIZE,
+        //clear default text
+        true
+    );
+    text_input_set_header_text(caesar_state->text_input, "Input");
+
+    // Open GUI and register view_port
+    Gui* gui = furi_record_open("gui");
+    //gui_add_view_port(gui, view_port, GuiLayerFullscreen);
+    
+    //FURI_LOG_D("caesar_cipher", "Enabling view dispatcher queue");
+    //view_dispatcher_enable_queue(caesar_state->view_dispatcher);
+
+    FURI_LOG_D("caesar_cipher", "Adding text input view to dispatcher");
+    view_dispatcher_add_view(caesar_state->view_dispatcher, 0, text_input_get_view(caesar_state->text_input)); 
+    FURI_LOG_D("caesar_cipher", "Attaching view dispatcher to GUI");
+    view_dispatcher_attach_to_gui(caesar_state->view_dispatcher, gui, ViewDispatcherTypeFullscreen);
+    FURI_LOG_D("ceasar_cipher", "starting view dispatcher");
+    //view_dispatcher_run(caesar_state->view_dispatcher);
+    view_dispatcher_switch_to_view(caesar_state->view_dispatcher, 0);
+
+    PluginEvent event;
+    for(bool processing = true; processing;) {
+        FuriStatus event_status = furi_message_queue_get(event_queue, &event, 100);
+
+        CaesarState* caesar_state = (CaesarState*)acquire_mutex_block(&state_mutex);
+
+        if(event_status == FuriStatusOk) {
+            // press events
+            if(event.type == EventTypeKey) {
+                if(event.input.type == InputTypePress) {
+                    switch(event.input.key) {
+                    case InputKeyUp:
+                        break;
+                    case InputKeyDown:
+                        break;
+                    case InputKeyRight:
+                        break;
+                    case InputKeyLeft:
+                        break;
+                    case InputKeyOk:
+                        break;
+                    case InputKeyBack:
+                        processing = false;
+                        break;
+                    }
+                }
+            }
+        } else {
+            FURI_LOG_D("caesar_cipher", "FuriMessageQueue: event timeout");
+            // event timeout
+        }
+
+        //view_port_update(view_port);
+        release_mutex(&state_mutex, caesar_state);
+    }
+
+    //view_port_enabled_set(view_port, false);
+    //gui_remove_view_port(gui, view_port);
+    furi_record_close("gui");
+    //view_port_free(view_port);
+    furi_message_queue_free(event_queue);
+    delete_mutex(&state_mutex);
+    caesar_cipher_state_free(caesar_state);
+
+    return 0;
+}