getUserQuery method

String getUserQuery(String userId, { Set<String>? filters, Sort? sort, int? from, })

Builds the user query url used in the call to Shadertoy user page in order to obtain both the user and the his shaders data.

• userId: The user Id
• filters: A set of tag filters
• sort: The sort order of the shaders
• from: A 0 based index for results returned

The call is performed to a user page identified by it's id, for example user iq page

Implementation

String getUserQuery(String userId,
    {Set<String>? filters, Sort? sort, int? from}) {
  var num = options.pageUserShaderCount;

  var queryParameters = [];

  if (filters != null) {
    for (var filter in filters) {
      queryParameters.add('filter=$filter');
    }
  }

  if (sort != null) {
    queryParameters.add('sort=${sort.name}');
  }

  if (from != null) {
    queryParameters.add('from=$from');
  }

  queryParameters.add('num=$num');

  var sb = StringBuffer(_getUserUrl(userId));
  for (var i = 0; i < queryParameters.length; i++) {
    // Strangely the only way to filter the calls is by ommiting ? in the
    // query string. This is probably a bug on the shadertoy website
    // If fixed line bellow should be used to distinguish between index 0
    // thus '?' and the remaining indexes (which should use '&')
    sb.write('&');
    sb.write(queryParameters[i]);
  }

  return sb.toString();
}