Refactor database handling: remove db_handler module, implement file_handler for CSV operations, and update TUI to integrate new export functionality.

src/file_handler.c

@@ -0,0 +1,87 @@
+#include "file_handler.h"
+
+int loadListFromCSV(char *_filename, list_t *_list)
+{
+    FILE *f_in = fopen(_filename, "r");
+    if (f_in == NULL)
+    {
+        // doprasit
+        exit(-1);
+    }
+
+    char *buffer = NULL;
+    size_t buffer_size = 0;
+
+    int load_sum = 0;
+
+    char _name[128], _surname[128];
+    uint32_t _department;
+    uint16_t _uuid;
+    time_t _last_event, _total;
+    BYTE _avail;
+    while (-1 != getline(&buffer, &buffer_size, f_in))
+    {
+        if (sscanf(buffer, "%hu,%127[^,],%127[^,],%u,%ld,%ld,%hhu", &_uuid, _name, _surname, &_department, &_last_event, &_total, &_avail) == 7)
+        {
+            loadPersonToList(_list, _uuid, _name, _surname, _department, _last_event, _total, _avail);
+            load_sum++;
+        }
+        else
+        {
+            // vstupni databaze je vadna
+            exit(-1);
+        }
+    }
+    free(buffer);
+    fclose(f_in);
+    return load_sum;
+}
+
+int saveListToCSV(char *_filename, list_t *_list)
+{
+    FILE *f_out = fopen(_filename, "w");
+    if (f_out == NULL)
+    {
+        // doprasit
+        exit(-1);
+    }
+
+    node_t *cursor = _list->head;
+    while (cursor != NULL)
+    {
+        if (cursor->user.uuid != 0)
+        {
+            fprintf(f_out, "%hu,%s,%s,%u,%ld,%ld,%hhu\n", cursor->user.uuid, cursor->user.name, cursor->user.surname, cursor->user.department, cursor->user.last_time_event, cursor->user.total, cursor->user.available);
+        }
+        cursor = cursor->next;
+    }
+
+    int save_sum = 0;
+
+    fclose(f_out);
+    return save_sum;
+}
+
+int exportPersonInfo(node_t *_person)
+{
+    char filename[64];
+    sprintf(filename, "person_uuid%d.txt", _person->user.uuid);
+
+    FILE *f_out = fopen(filename, "w");
+    if (f_out == NULL)
+    {
+        return 0;
+    }
+
+    char last_time_event_str[64];
+    printDateAndTimeInString(_person->user.last_time_event, last_time_event_str);
+
+    char total_time_str[64];
+    printTimeInString(_person->user.total, total_time_str);
+
+    fprintf(f_out, "NAME: %s\nSURNAME: %s\nDEPARTMENT: %d\nLAST TIME EVENT: %s\nTOTAL TIME: %s\n", _person->user.name, _person->user.surname, _person->user.department, last_time_event_str, total_time_str);
+
+    fclose(f_out);
+
+    return 1;
+}