Refactor CSV handling: update file names, implement saveListToCSV function, and enhance loadListFromCSV error handling.

.vscode/launch.json

@@ -5,7 +5,7 @@
             "name": "Debug",
             "type": "cppdbg",
             "request": "launch",
-            "args": ["khkokhot.csv"],
+            "args": ["TestList.csv"],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
             "environment": [],

include/db_handler.h

@@ -8,6 +8,7 @@
 
 #include "main.h"
 #include "users.h"
+#include <string.h>
 #include <libpq-fe.h>
 
 int loadListFromCSV(char* _filename, list_t * _list);

src/db_handler.c

@@ -1,6 +1,5 @@
 #include "db_handler.h"
 
-
 int loadListFromCSV(char *_filename, list_t *_list)
 {
     FILE *f_in = fopen(_filename, "r");
@@ -15,13 +14,50 @@ int loadListFromCSV(char *_filename, list_t *_list)
 
     int load_sum = 0;
 
-    char _name[128], _surname[128]; uint32_t _department; uint16_t _uuid; time_t _last_event, _total; BYTE _avail;
+    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))
     {
-        sscanf(buffer, "%hu,%127[^,],%127[^,],%u,%ld,%ld,%hhu", &_uuid, _name, _surname, &_department, &_last_event, &_total, &_avail);
+        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", 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;
+}

src/main.c

@@ -60,6 +60,7 @@ int main(int argc, char const **argv)
     pthread_mutex_init(&person_list.lock, NULL);
 
     loadListFromCSV(argv[1], &person_list);
+    saveListToCSV("khohotjorjijer.csv", &person_list);
 
     noecho();
     noraw();