SubGhz: add GFSK modulation, refactoring subghz_chat (#866)

* SubGhz: add GFSK modulation, refactoring subghz_chat
* SubGhz: off echo subghz_chat
* SubGhz: subghz_chat add sending and receiving formatted text, translation of the chat to events
* SubGhz: add UTF support in subghz_chat_worker_alloc

Co-authored-by: あく <alleteam@gmail.com>

3 files changed, 279 insertions, 48 deletions

diff --git a/applications/subghz/helpers/subghz_chat.c b/applications/subghz/helpers/subghz_chat.c
new file mode 100644
index 00000000..15e08dde
--- /dev/null
+++ b/applications/subghz/helpers/subghz_chat.c
@@ -0,0 +1,141 @@
+#include "subghz_chat.h"
+#include <lib/subghz/subghz_tx_rx_worker.h>
+
+#define TAG "SubGhzChat"
+#define SUBGHZ_CHAT_WORKER_TIMEOUT_BETWEEN_MESSAGES 500
+
+struct SubGhzChatWorker {
+    FuriThread* thread;
+    SubGhzTxRxWorker* subghz_txrx;
+
+    volatile bool worker_running;
+    volatile bool worker_stoping;
+    osMessageQueueId_t event_queue;
+    uint32_t last_time_rx_data;
+};
+
+/** Worker thread
+ * 
+ * @param context 
+ * @return exit code 
+ */
+static int32_t subghz_chat_worker_thread(void* context) {
+    SubGhzChatWorker* instance = context;
+    FURI_LOG_I(TAG, "Worker start");
+    char c;
+    SubghzChatEvent event;
+    event.event = SubghzChatEventUserEntrance;
+    osMessageQueuePut(instance->event_queue, &event, 0, 0);
+    while(instance->worker_running) {
+        if(furi_hal_vcp_rx_with_timeout((uint8_t*)&c, 1, osWaitForever) == 1) {
+            event.event = SubghzChatEventInputData;
+            event.c = c;
+            osMessageQueuePut(instance->event_queue, &event, 0, osWaitForever);
+        }
+    }
+
+    FURI_LOG_I(TAG, "Worker stop");
+    return 0;
+}
+
+static void subghz_chat_worker_update_rx_event_chat(void* context) {
+    furi_assert(context);
+    SubGhzChatWorker* instance = context;
+    SubghzChatEvent event;
+    if((millis() - instance->last_time_rx_data) > SUBGHZ_CHAT_WORKER_TIMEOUT_BETWEEN_MESSAGES) {
+        event.event = SubghzChatEventNewMessage;
+        osMessageQueuePut(instance->event_queue, &event, 0, osWaitForever);
+    }
+    instance->last_time_rx_data = millis();
+    event.event = SubghzChatEventRXData;
+    osMessageQueuePut(instance->event_queue, &event, 0, osWaitForever);
+}
+
+SubGhzChatWorker* subghz_chat_worker_alloc() {
+    SubGhzChatWorker* instance = furi_alloc(sizeof(SubGhzChatWorker));
+
+    instance->thread = furi_thread_alloc();
+    furi_thread_set_name(instance->thread, "SubghzChat");
+    furi_thread_set_stack_size(instance->thread, 2048);
+    furi_thread_set_context(instance->thread, instance);
+    furi_thread_set_callback(instance->thread, subghz_chat_worker_thread);
+    instance->subghz_txrx = subghz_tx_rx_worker_alloc();
+    instance->event_queue = osMessageQueueNew(80, sizeof(SubghzChatEvent), NULL);
+    return instance;
+}
+
+void subghz_chat_worker_free(SubGhzChatWorker* instance) {
+    furi_assert(instance);
+    furi_assert(!instance->worker_running);
+    osMessageQueueDelete(instance->event_queue);
+    subghz_tx_rx_worker_free(instance->subghz_txrx);
+    furi_thread_free(instance->thread);
+
+    free(instance);
+}
+
+bool subghz_chat_worker_start(SubGhzChatWorker* instance, uint32_t frequency) {
+    furi_assert(instance);
+    furi_assert(!instance->worker_running);
+    bool res = false;
+
+    if(subghz_tx_rx_worker_start(instance->subghz_txrx, frequency)) {
+        osMessageQueueReset(instance->event_queue);
+        subghz_tx_rx_worker_set_callback_have_read(
+            instance->subghz_txrx, subghz_chat_worker_update_rx_event_chat, instance);
+
+        instance->worker_running = true;
+        instance->last_time_rx_data = 0;
+
+        res = furi_thread_start(instance->thread);
+    }
+    return res;
+}
+
+void subghz_chat_worker_stop(SubGhzChatWorker* instance) {
+    furi_assert(instance);
+    furi_assert(instance->worker_running);
+    if(subghz_tx_rx_worker_is_running(instance->subghz_txrx)) {
+        subghz_tx_rx_worker_stop(instance->subghz_txrx);
+    }
+
+    instance->worker_running = false;
+
+    furi_thread_join(instance->thread);
+}
+
+bool subghz_chat_worker_is_running(SubGhzChatWorker* instance) {
+    furi_assert(instance);
+    return instance->worker_running;
+}
+
+SubghzChatEvent subghz_chat_worker_get_event_chat(SubGhzChatWorker* instance) {
+    furi_assert(instance);
+    SubghzChatEvent event;
+    if(osMessageQueueGet(instance->event_queue, &event, NULL, osWaitForever) == osOK) {
+        return event;
+    } else {
+        event.event = SubghzChatEventNoEvent;
+        return event;
+    }
+}
+
+void subghz_chat_worker_put_event_chat(SubGhzChatWorker* instance, SubghzChatEvent* event) {
+    furi_assert(instance);
+    osMessageQueuePut(instance->event_queue, event, 0, osWaitForever);
+}
+
+size_t subghz_chat_worker_available(SubGhzChatWorker* instance) {
+    furi_assert(instance);
+    return subghz_tx_rx_worker_available(instance->subghz_txrx);
+}
+
+size_t subghz_chat_worker_read(SubGhzChatWorker* instance, uint8_t* data, size_t size) {
+    furi_assert(instance);
+    return subghz_tx_rx_worker_read(instance->subghz_txrx, data, size);
+}
+
+bool subghz_chat_worker_write(SubGhzChatWorker* instance, uint8_t* data, size_t size) {
+    furi_assert(instance);
+    return subghz_tx_rx_worker_write(instance->subghz_txrx, data, size);
+}
\ No newline at end of file
diff --git a/applications/subghz/helpers/subghz_chat.h b/applications/subghz/helpers/subghz_chat.h
new file mode 100644
index 00000000..89f82ef3
--- /dev/null
+++ b/applications/subghz/helpers/subghz_chat.h
@@ -0,0 +1,29 @@
+#pragma once
+#include "../subghz_i.h"
+
+typedef struct SubGhzChatWorker SubGhzChatWorker;
+
+typedef enum {
+    SubghzChatEventNoEvent,
+    SubghzChatEventUserEntrance,
+    SubghzChatEventUserExit,
+    SubghzChatEventInputData,
+    SubghzChatEventRXData,
+    SubghzChatEventNewMessage,
+} SubghzChatEventType;
+
+typedef struct {
+    SubghzChatEventType event;
+    char c;
+} SubghzChatEvent;
+
+SubGhzChatWorker* subghz_chat_worker_alloc();
+void subghz_chat_worker_free(SubGhzChatWorker* instance);
+bool subghz_chat_worker_start(SubGhzChatWorker* instance, uint32_t frequency);
+void subghz_chat_worker_stop(SubGhzChatWorker* instance);
+bool subghz_chat_worker_is_running(SubGhzChatWorker* instance);
+SubghzChatEvent subghz_chat_worker_get_event_chat(SubGhzChatWorker* instance);
+void subghz_chat_worker_put_event_chat(SubGhzChatWorker* instance, SubghzChatEvent* event);
+size_t subghz_chat_worker_available(SubGhzChatWorker* instance);
+size_t subghz_chat_worker_read(SubGhzChatWorker* instance, uint8_t* data, size_t size);
+bool subghz_chat_worker_write(SubGhzChatWorker* instance, uint8_t* data, size_t size);
diff --git a/applications/subghz/subghz_cli.c b/applications/subghz/subghz_cli.c
index 2578fb26..2f9d698e 100644
--- a/applications/subghz/subghz_cli.c
+++ b/applications/subghz/subghz_cli.c
@@ -9,7 +9,8 @@
 #include <lib/subghz/subghz_keystore.h>
 #include <lib/subghz/protocols/subghz_protocol_common.h>
 #include <lib/subghz/protocols/subghz_protocol_princeton.h>
-#include <lib/subghz/subghz_tx_rx_worker.h>
+
+#include "helpers/subghz_chat.h"
 
 #include <notification/notification-messages.h>
 
@@ -377,23 +378,34 @@ static void subghz_cli_command_chat(Cli* cli, string_t args) {
         return;
     }
 
-    SubGhzTxRxWorker* subghz_txrx = subghz_tx_rx_worker_alloc();
-    subghz_tx_rx_worker_start(subghz_txrx, frequency);
+    SubGhzChatWorker* subghz_chat = subghz_chat_worker_alloc();
+    if(!subghz_chat_worker_start(subghz_chat, frequency)) {
+        printf("Startup error SubGhzChatWorker\r\n");
+
+        if(subghz_chat_worker_is_running(subghz_chat)) {
+            subghz_chat_worker_stop(subghz_chat);
+            subghz_chat_worker_free(subghz_chat);
+        }
+        return;
+    }
 
     printf("Receiving at frequency %lu Hz\r\n", frequency);
     printf("Press CTRL+C to stop\r\n");
 
     furi_hal_power_suppress_charge_enter();
+
     size_t message_max_len = 64;
     uint8_t message[64] = {0};
     string_t input;
     string_init(input);
     string_t name;
     string_init(name);
+    string_t output;
+    string_init(output);
     string_t sysmsg;
     string_init(sysmsg);
-    char c;
     bool exit = false;
+    SubghzChatEvent chat_event;
 
     NotificationApp* notification = furi_record_open("notification");
 
@@ -402,71 +414,120 @@ static void subghz_cli_command_chat(Cli* cli, string_t args) {
     printf("%s", string_get_cstr(input));
     fflush(stdout);
 
-    string_printf(sysmsg, "\033[0;34m%s joined chat.\033[0m", furi_hal_version_get_name_ptr());
-    subghz_tx_rx_worker_write(
-        subghz_txrx, (uint8_t*)string_get_cstr(sysmsg), strlen(string_get_cstr(sysmsg)));
-
     while(!exit) {
-        if(furi_hal_vcp_rx_with_timeout((uint8_t*)&c, 1, 0) == 1) {
-            if(c == CliSymbolAsciiETX) {
+        chat_event = subghz_chat_worker_get_event_chat(subghz_chat);
+        switch(chat_event.event) {
+        case SubghzChatEventInputData:
+            if(chat_event.c == CliSymbolAsciiETX) {
                 printf("\r\n");
-                exit = true;
+                chat_event.event = SubghzChatEventUserExit;
+                subghz_chat_worker_put_event_chat(subghz_chat, &chat_event);
                 break;
-            } else if((c >= 0x20 && c < 0x7F) || (c >= 0x80 && c < 0xF0)) {
-                putc(c, stdout);
-                fflush(stdout);
-                string_push_back(input, c);
-            } else if((c == CliSymbolAsciiBackspace) || (c == CliSymbolAsciiDel)) {
-                size_t len = string_size(input);
-                if(len > string_size(name)) {
+            } else if(
+                (chat_event.c == CliSymbolAsciiBackspace) || (chat_event.c == CliSymbolAsciiDel)) {
+                size_t len = string_length_u(input);
+                if(len > string_length_u(name)) {
                     printf("%s", "\e[D\e[1P");
                     fflush(stdout);
-                    string_set_strn(input, string_get_cstr(input), len - 1);
+                    //delete 1 char UTF
+                    const char* str = string_get_cstr(input);
+                    size_t size = 0;
+                    m_str1ng_utf8_state_e s = M_STRING_UTF8_STARTING;
+                    string_unicode_t u = 0;
+                    string_reset(sysmsg);
+                    while(*str) {
+                        m_str1ng_utf8_decode(*str, &s, &u);
+                        if((s == M_STRING_UTF8_ERROR) || s == M_STRING_UTF8_STARTING) {
+                            string_push_u(sysmsg, u);
+                            if(++size >= len - 1) break;
+                            s = M_STRING_UTF8_STARTING;
+                        }
+                        str++;
+                    }
+                    string_set(input, sysmsg);
                 }
-            } else if(c == CliSymbolAsciiCR) {
+            } else if(chat_event.c == CliSymbolAsciiCR) {
                 printf("\r\n");
-                subghz_tx_rx_worker_write(
-                    subghz_txrx, (uint8_t*)string_get_cstr(input), strlen(string_get_cstr(input)));
+                string_push_back(input, '\r');
+                string_push_back(input, '\n');
+                while(!subghz_chat_worker_write(
+                    subghz_chat,
+                    (uint8_t*)string_get_cstr(input),
+                    strlen(string_get_cstr(input)))) {
+                    delay(10);
+                }
+
                 string_printf(input, "%s", string_get_cstr(name));
                 printf("%s", string_get_cstr(input));
                 fflush(stdout);
+            } else if(chat_event.c == CliSymbolAsciiLF) {
+                //cut out the symbol \n
+            } else {
+                putc(chat_event.c, stdout);
+                fflush(stdout);
+                string_push_back(input, chat_event.c);
+                break;
+            case SubghzChatEventRXData:
+                do {
+                    memset(message, 0x00, message_max_len);
+                    size_t len = subghz_chat_worker_read(subghz_chat, message, message_max_len);
+                    for(size_t i = 0; i < len; i++) {
+                        string_push_back(output, message[i]);
+                        if(message[i] == '\n') {
+                            printf("\r");
+                            for(uint8_t i = 0; i < 80; i++) {
+                                printf(" ");
+                            }
+                            printf("\r %s", string_get_cstr(output));
+                            printf("%s", string_get_cstr(input));
+                            fflush(stdout);
+                            string_reset(output);
+                        }
+                    }
+                } while(subghz_chat_worker_available(subghz_chat));
+                break;
+            case SubghzChatEventNewMessage:
+                notification_message(notification, &sequence_single_vibro);
+                break;
+            case SubghzChatEventUserEntrance:
+                string_printf(
+                    sysmsg,
+                    "\033[0;34m%s joined chat.\033[0m\r\n",
+                    furi_hal_version_get_name_ptr());
+                subghz_chat_worker_write(
+                    subghz_chat,
+                    (uint8_t*)string_get_cstr(sysmsg),
+                    strlen(string_get_cstr(sysmsg)));
+                break;
+            case SubghzChatEventUserExit:
+                string_printf(
+                    sysmsg, "\033[0;31m%s left chat.\033[0m\r\n", furi_hal_version_get_name_ptr());
+                subghz_chat_worker_write(
+                    subghz_chat,
+                    (uint8_t*)string_get_cstr(sysmsg),
+                    strlen(string_get_cstr(sysmsg)));
+                delay(10);
+                exit = true;
+                break;
+            default:
+                FURI_LOG_W("SubGhzChat", "Error event");
+                break;
             }
         }
-
-        if(subghz_tx_rx_worker_available(subghz_txrx)) {
-            memset(message, 0x00, message_max_len);
-            subghz_tx_rx_worker_read(subghz_txrx, message, message_max_len);
-            printf("\r");
-            for(uint8_t i = 0; i < 80; i++) {
-                printf(" ");
-            }
-
-            printf("\r %s\r\n", message);
-
-            printf("%s", string_get_cstr(input));
-            fflush(stdout);
-
-            notification_message(notification, &sequence_single_vibro);
-        }
-        osDelay(1);
     }
 
-    string_printf(sysmsg, "\033[0;31m%s left chat.\033[0m", furi_hal_version_get_name_ptr());
-    subghz_tx_rx_worker_write(
-        subghz_txrx, (uint8_t*)string_get_cstr(sysmsg), strlen(string_get_cstr(sysmsg)));
-    osDelay(10);
-
-    printf("\r\nExit chat\r\n");
     string_clear(input);
     string_clear(name);
+    string_clear(output);
     string_clear(sysmsg);
     furi_hal_power_suppress_charge_exit();
     furi_record_close("notification");
 
-    if(subghz_tx_rx_worker_is_running(subghz_txrx)) {
-        subghz_tx_rx_worker_stop(subghz_txrx);
-        subghz_tx_rx_worker_free(subghz_txrx);
+    if(subghz_chat_worker_is_running(subghz_chat)) {
+        subghz_chat_worker_stop(subghz_chat);
+        subghz_chat_worker_free(subghz_chat);
     }
+    printf("\r\nExit chat\r\n");
 }
 
 static void subghz_cli_command(Cli* cli, string_t args, void* context) {