/* parse an url parameter (that looks like "foo=plop") and fill a key_value structure */
void parse_key_value(char* str, struct key_value* key_value) {
  char* saveptr;
  char* key, *value;
  key = strtok_r(str, "=", &saveptr);
  value = strtok_r(NULL, "=", &saveptr);
  strncpy(key_value->key, key, MAX_URL_LENGTH);
  strncpy(key_value->value, value, MAX_VALUE_LENGTH);
}

/* Parse a get url that looks like "/display?user=plip&foo=plop&bar=plup" and fill a
 *  page_request structure
 */
void parse_url(char* url, struct page_request *page_request) {
  char* param[MAX_NB_PARAMETERS];
  int nb_param = 0;
  char* saveptr;

  /* extract page name */
  char* page_url = strtok_r(url, "/", &saveptr);

  if(page_url) {
    /* extract parameters */
    page_url=strtok_r(page_url, "?", &saveptr);

    if(page_url) {
      param[0] = strtok_r(NULL, "&", &saveptr);

      if(param[0]) {
	/* there's at least one parameter */
	parse_key_value(param[0], &page_request->parameters[0]);
	/* the other parameters are separated with & */
	for(int i =1; i<MAX_NB_PARAMETERS; i++) {
	  param[i] = strtok_r(NULL, "&", &saveptr);
	  if(!param[i]) {
	    nb_param = i;
	    break;
	  }
	  parse_key_value(param[i], &page_request->parameters[i]);
	}
      }
    }
    strncpy(page_request->url, page_url, MAX_URL_LENGTH);
  } else {
     strncpy(page_request->url, "", MAX_URL_LENGTH);
  }

  page_request->nb_param = nb_param;
}