updated file database added get_all_users get_user_by_id

get_user_by_username get_user_field_by_id

src/db_get_user_by_username.c

@@ -1,7 +1,12 @@
+#include "cJSON.h"
 #include "database.h"
 #include "sql.h"
 #include "user.h"
 
+#ifndef USE_SQLITE3
+#include "file.h"
+#endif
+
 User *db_get_user_by_username(const char *username) {
 #ifdef USE_SQLITE3
   User *user = nullptr;
@@ -43,7 +48,30 @@ User *db_get_user_by_username(const char *username) {
   pthread_mutex_unlock(&db_mutex);
   return user;
 #else
-  User *asdf = new_user(0, "asdf", "asdf", "asdf", "asdf", false);
-  return asdf;
+  pthread_mutex_lock(&users_file_mutex);
+  char *data = read_file("users_db.json");
+  cJSON *users = cJSON_Parse(data);
+  cJSON *user = nullptr;
+  User *found = nullptr;
+  cJSON_ArrayForEach(user, users) {
+    cJSON *user_id = cJSON_GetObjectItem(user, "id");
+    cJSON *user_username = cJSON_GetObjectItem(user, "username");
+    cJSON *user_password = cJSON_GetObjectItem(user, "password");
+    cJSON *user_email = cJSON_GetObjectItem(user, "email");
+    cJSON *user_group = cJSON_GetObjectItem(user, "group");
+    cJSON *user_is_superuser = cJSON_GetObjectItem(user, "is_superuser");
+    if (!strcmp(user_username->valuestring, username)) {
+      found = new_user(user_id->valueint, user_username->valuestring,
+                       user_password->valuestring, user_email->valuestring,
+                       user_group->valuestring, user_is_superuser->valueint);
+      break;
+    }
+  }
+  if (found == nullptr) {
+      pthread_mutex_unlock(&users_file_mutex);
+      return nullptr;
+  }
+  pthread_mutex_unlock(&users_file_mutex);
+  return found;
 #endif
 }