Momentum-Firmware/applications/main/bad_kb/bad_kb_app.c

#include "bad_kb_app.h"
#include "bad_kb_settings_filename.h"
#include <furi.h>
#include <furi_hal.h>
#include <storage/storage.h>
#include <lib/toolbox/path.h>
#include <xtreme/settings.h>

#include <bt/bt_service/bt_i.h>
#include <bt/bt_service/bt.h>

#define BAD_KB_SETTINGS_PATH BAD_KB_APP_BASE_FOLDER "/" BAD_KB_SETTINGS_FILE_NAME

static bool bad_kb_app_custom_event_callback(void* context, uint32_t event) {
    furi_assert(context);
    BadKbApp* app = context;
    return scene_manager_handle_custom_event(app->scene_manager, event);
}

static bool bad_kb_app_back_event_callback(void* context) {
    furi_assert(context);
    BadKbApp* app = context;
    return scene_manager_handle_back_event(app->scene_manager);
}

static void bad_kb_app_tick_event_callback(void* context) {
    furi_assert(context);
    BadKbApp* app = context;
    scene_manager_handle_tick_event(app->scene_manager);
}

static void bad_kb_load_settings(BadKbApp* app) {
    File* settings_file = storage_file_alloc(furi_record_open(RECORD_STORAGE));
    if(storage_file_open(settings_file, BAD_KB_SETTINGS_PATH, FSAM_READ, FSOM_OPEN_EXISTING)) {
        char chr;
        while((storage_file_read(settings_file, &chr, 1) == 1) &&
              !storage_file_eof(settings_file) && !isspace(chr)) {
            furi_string_push_back(app->keyboard_layout, chr);
        }
    } else {
        furi_string_reset(app->keyboard_layout);
    }
    storage_file_close(settings_file);
    storage_file_free(settings_file);

    if(!furi_string_empty(app->keyboard_layout)) {
        Storage* fs_api = furi_record_open(RECORD_STORAGE);
        FileInfo layout_file_info;
        FS_Error file_check_err = storage_common_stat(
            fs_api, furi_string_get_cstr(app->keyboard_layout), &layout_file_info);
        furi_record_close(RECORD_STORAGE);
        if(file_check_err != FSE_OK) {
            furi_string_reset(app->keyboard_layout);
            return;
        }
        if(layout_file_info.size != 256) {
            furi_string_reset(app->keyboard_layout);
        }
    }
}

static void bad_kb_save_settings(BadKbApp* app) {
    File* settings_file = storage_file_alloc(furi_record_open(RECORD_STORAGE));
    if(storage_file_open(settings_file, BAD_KB_SETTINGS_PATH, FSAM_WRITE, FSOM_OPEN_ALWAYS)) {
        storage_file_write(
            settings_file,
            furi_string_get_cstr(app->keyboard_layout),
            furi_string_size(app->keyboard_layout));
        storage_file_write(settings_file, "\n", 1);
    }
    storage_file_close(settings_file);
    storage_file_free(settings_file);
}

void bad_kb_reload_worker(BadKbApp* app) {
    bad_kb_script_close(app->bad_kb_script);
    app->bad_kb_script = bad_kb_script_open(app->file_path, app->is_bt ? app->bt : NULL);
    bad_kb_script_set_keyboard_layout(app->bad_kb_script, app->keyboard_layout);
}

void bad_kb_config_switch_mode(BadKbApp* app) {
    scene_manager_previous_scene(app->scene_manager);
    if(app->is_bt) {
        furi_hal_bt_start_advertising();
    } else {
        furi_hal_bt_stop_advertising();
    }
    scene_manager_next_scene(app->scene_manager, BadKbSceneConfig);
    bad_kb_reload_worker(app);
}

void bad_kb_config_switch_remember_mode(BadKbApp* app) {
    if(app->bt_remember) {
        // set bouding mac
        uint8_t mac[6] = BAD_KB_BOUND_MAC_ADDRESS;
        furi_hal_bt_set_profile_pairing_method(
            FuriHalBtProfileHidKeyboard, GapPairingPinCodeVerifyYesNo);
        bt_set_profile_mac_address(app->bt, mac); // this also restart bt
        // enable keys storage
        bt_enable_peer_key_update(app->bt);
    } else {
        // set back user defined mac address
        furi_hal_bt_set_profile_pairing_method(FuriHalBtProfileHidKeyboard, GapPairingNone);
        bt_set_profile_mac_address(app->bt, app->mac);
        // disable key storage
        bt_disable_peer_key_update(app->bt);
    }
    bad_kb_reload_worker(app);
}

int32_t bad_kb_connection_init(BadKbApp* app) {
    app->usb_prev_mode = furi_hal_usb_get_config();
    furi_hal_usb_set_config(NULL, NULL);

    bt_timeout = bt_hid_delays[LevelRssi39_0];
    bt_disconnect(app->bt);
    // furi_delay_ms(200);
    bt_keys_storage_set_storage_path(app->bt, BAD_KB_APP_PATH_BOUND_KEYS_FILE);
    app->bt_prev_mode = furi_hal_bt_get_profile_pairing_method(FuriHalBtProfileHidKeyboard);
    if(app->bt_remember) {
        uint8_t mac[6] = BAD_KB_BOUND_MAC_ADDRESS;
        furi_hal_bt_set_profile_mac_addr(FuriHalBtProfileHidKeyboard, mac);
        // using GapPairingNone breaks bounding between devices
        furi_hal_bt_set_profile_pairing_method(
            FuriHalBtProfileHidKeyboard, GapPairingPinCodeVerifyYesNo);
    } else {
        furi_hal_bt_set_profile_pairing_method(FuriHalBtProfileHidKeyboard, GapPairingNone);
    }

    bt_set_profile(app->bt, BtProfileHidKeyboard);
    if(app->is_bt) {
        furi_hal_bt_start_advertising();
        if(app->bt_remember) {
            bt_enable_peer_key_update(app->bt);
        } else {
            bt_disable_peer_key_update(app->bt); // disable peer key adding to bt SRAM storage
        }
    } else {
        furi_hal_bt_stop_advertising();
    }

    return 0;
}

void bad_kb_connection_deinit(BadKbApp* app) {
    furi_hal_usb_set_config(app->usb_prev_mode, NULL);

    // bt_hid_hold_while_keyboard_buffer_full(6, 3000); // release all keys
    bt_disconnect(app->bt); // stop ble
    // furi_delay_ms(200); // Wait 2nd core to update nvm storage
    bt_keys_storage_set_default_path(app->bt);
    if(app->bt_remember) {
        // hal primitives doesn't restarts ble, that's what we want cuz we are shutting down
        furi_hal_bt_set_profile_mac_addr(FuriHalBtProfileHidKeyboard, app->mac);
    }
    bt_enable_peer_key_update(app->bt); // starts saving peer keys (bounded devices)
    // fails if ble radio stack isn't ready when switching profile
    // if it happens, maybe we should increase the delay after bt_disconnect
    bt_set_profile(app->bt, BtProfileSerial);
    furi_hal_bt_set_profile_pairing_method(FuriHalBtProfileHidKeyboard, app->bt_prev_mode);
}

BadKbApp* bad_kb_app_alloc(char* arg) {
    BadKbApp* app = malloc(sizeof(BadKbApp));

    app->bad_kb_script = NULL;

    app->file_path = furi_string_alloc();
    app->keyboard_layout = furi_string_alloc();
    if(arg && strlen(arg)) {
        furi_string_set(app->file_path, arg);
    }

    Storage* storage = furi_record_open(RECORD_STORAGE);
    storage_simply_mkdir(storage, BAD_KB_APP_BASE_FOLDER);
    furi_record_close(RECORD_STORAGE);

    bad_kb_load_settings(app);

    app->gui = furi_record_open(RECORD_GUI);
    app->notifications = furi_record_open(RECORD_NOTIFICATION);
    app->dialogs = furi_record_open(RECORD_DIALOGS);

    app->view_dispatcher = view_dispatcher_alloc();
    view_dispatcher_enable_queue(app->view_dispatcher);

    app->scene_manager = scene_manager_alloc(&bad_kb_scene_handlers, app);

    view_dispatcher_set_event_callback_context(app->view_dispatcher, app);
    view_dispatcher_set_tick_event_callback(
        app->view_dispatcher, bad_kb_app_tick_event_callback, 500);
    view_dispatcher_set_custom_event_callback(
        app->view_dispatcher, bad_kb_app_custom_event_callback);
    view_dispatcher_set_navigation_event_callback(
        app->view_dispatcher, bad_kb_app_back_event_callback);

    Bt* bt = furi_record_open(RECORD_BT);
    app->bt = bt;
    app->bt->suppress_pin_screen = true;
    app->is_bt = XTREME_SETTINGS()->bad_bt;
    app->bt_remember = XTREME_SETTINGS()->bad_bt_remember;
    const char* adv_name = furi_hal_bt_get_profile_adv_name(FuriHalBtProfileHidKeyboard);
    memcpy(app->name, adv_name, BAD_KB_ADV_NAME_MAX_LEN);
    memcpy(app->bt_old_config.name, adv_name, BAD_KB_ADV_NAME_MAX_LEN);

    // need to be done before bt init (where mac address get modified if bounding is activated)
    const uint8_t* mac_addr = furi_hal_bt_get_profile_mac_addr(FuriHalBtProfileHidKeyboard);
    memcpy(app->mac, mac_addr, BAD_KB_MAC_ADDRESS_LEN);
    memcpy(app->bt_old_config.mac, mac_addr, BAD_KB_MAC_ADDRESS_LEN);

    // Custom Widget
    app->widget = widget_alloc();
    view_dispatcher_add_view(
        app->view_dispatcher, BadKbAppViewError, widget_get_view(app->widget));

    app->var_item_list = variable_item_list_alloc();
    view_dispatcher_add_view(
        app->view_dispatcher, BadKbAppViewConfig, variable_item_list_get_view(app->var_item_list));

    app->bad_kb_view = bad_kb_alloc();
    view_dispatcher_add_view(
        app->view_dispatcher, BadKbAppViewWork, bad_kb_get_view(app->bad_kb_view));

    app->text_input = text_input_alloc();
    view_dispatcher_add_view(
        app->view_dispatcher, BadKbAppViewConfigName, text_input_get_view(app->text_input));

    app->byte_input = byte_input_alloc();
    view_dispatcher_add_view(
        app->view_dispatcher, BadKbAppViewConfigMac, byte_input_get_view(app->byte_input));

    view_dispatcher_attach_to_gui(app->view_dispatcher, app->gui, ViewDispatcherTypeFullscreen);

    if(furi_hal_usb_is_locked()) {
        app->error = BadKbAppErrorCloseRpc;
        app->conn_init_thread = NULL;
        scene_manager_next_scene(app->scene_manager, BadKbSceneError);
    } else {
        app->conn_init_thread = furi_thread_alloc_ex(
            "BadKbConnInit", 1024, (FuriThreadCallback)bad_kb_connection_init, app);
        furi_thread_start(app->conn_init_thread);
        if(!furi_string_empty(app->file_path)) {
            app->bad_kb_script = bad_kb_script_open(app->file_path, app->is_bt ? app->bt : NULL);
            bad_kb_script_set_keyboard_layout(app->bad_kb_script, app->keyboard_layout);
            scene_manager_next_scene(app->scene_manager, BadKbSceneWork);
        } else {
            furi_string_set(app->file_path, BAD_KB_APP_BASE_FOLDER);
            scene_manager_next_scene(app->scene_manager, BadKbSceneFileSelect);
        }
    }

    return app;
}

void bad_kb_app_free(BadKbApp* app) {
    furi_assert(app);

    if(app->bad_kb_script) {
        bad_kb_script_close(app->bad_kb_script);
        app->bad_kb_script = NULL;
    }

    // Views
    view_dispatcher_remove_view(app->view_dispatcher, BadKbAppViewWork);
    bad_kb_free(app->bad_kb_view);

    // Custom Widget
    view_dispatcher_remove_view(app->view_dispatcher, BadKbAppViewError);
    widget_free(app->widget);

    // Variable item list
    view_dispatcher_remove_view(app->view_dispatcher, BadKbAppViewConfig);
    variable_item_list_free(app->var_item_list);

    // Text Input
    view_dispatcher_remove_view(app->view_dispatcher, BadKbAppViewConfigName);
    text_input_free(app->text_input);

    // Byte Input
    view_dispatcher_remove_view(app->view_dispatcher, BadKbAppViewConfigMac);
    byte_input_free(app->byte_input);

    // View dispatcher
    view_dispatcher_free(app->view_dispatcher);
    scene_manager_free(app->scene_manager);

    // Restore bt config
    // BtProfile has already been switched to the previous one
    // So we directly modify the right profile
    if(strcmp(app->bt_old_config.name, app->name) != 0) {
        furi_hal_bt_set_profile_adv_name(FuriHalBtProfileHidKeyboard, app->bt_old_config.name);
    }
    if(memcmp(app->bt_old_config.mac, app->mac, BAD_KB_MAC_ADDRESS_LEN) != 0) {
        furi_hal_bt_set_profile_mac_addr(FuriHalBtProfileHidKeyboard, app->bt_old_config.mac);
    }
    app->bt->suppress_pin_screen = false;

    if(app->conn_init_thread) {
        furi_thread_join(app->conn_init_thread);
        furi_thread_free(app->conn_init_thread);
        bad_kb_connection_deinit(app);
    }

    // Close records
    furi_record_close(RECORD_GUI);
    furi_record_close(RECORD_NOTIFICATION);
    furi_record_close(RECORD_DIALOGS);
    furi_record_close(RECORD_BT);

    bad_kb_save_settings(app);

    furi_string_free(app->file_path);
    furi_string_free(app->keyboard_layout);

    free(app);
}

int32_t bad_kb_app(void* p) {
    BadKbApp* bad_kb_app = bad_kb_app_alloc((char*)p);

    view_dispatcher_run(bad_kb_app->view_dispatcher);

    bad_kb_app_free(bad_kb_app);
    return 0;
}