private async Task <GoogleTrendsAuthorizationWidgets> Authorize(string request, GoogleTrendsPeriod period)
{
string periodRequest = string.Empty;
switch (period)
{
case GoogleTrendsPeriod.Past5Years:
periodRequest = "today+5-y";
break;
case GoogleTrendsPeriod.PastYear:
periodRequest = "today+12-m";
break;
case GoogleTrendsPeriod.Past3Months:
periodRequest = "today+3-m";
break;
case GoogleTrendsPeriod.PastMonth:
periodRequest = "today+1-m";
break;
case GoogleTrendsPeriod.PastWeek:
periodRequest = "now+7-d";
break;
case GoogleTrendsPeriod.PastDay:
periodRequest = "now+1-d";
break;
}
var authorizationRequest = new GoogleTrendsAuthorizationRequest
{
Hl = _googleTrendsSettings.Hl,
Tz = _googleTrendsSettings.Tz,
Req = $"%7B%22comparisonItem%22:%5B%7B%22keyword%22:%22{request}%22,%22geo%22:%22%22,%22time%22:%22{periodRequest}%22%7D%5D,%22category%22:0,%22property%22:%22%22%7D"
};
var response = await _restClient.GetAsync <GoogleTrendsAuthorizationRequest, GoogleTrendsAuthorizationResponse>(_googleTrendsSettings.AuthorizationEndpoint, authorizationRequest);
return(response.Widgets.First());
}
public async Task <GoogleTrendsDataResponse> GetTrendsForPeriod(string request, GoogleTrendsPeriod period)
{
request = request.Trim();
var authorizationResponse = await Authorize(request, period);
var googleRequest = new GoogleTrendsDataRequest
{
Tz = _googleTrendsSettings.Tz,
Token = authorizationResponse.Token,
Req = $"%7B%22time%22:%22{authorizationResponse.Request.Time.Replace("\\", "%5C%5C").Replace(' ', '+')}%22,%22resolution%22:%22{authorizationResponse.Request.Resolution}%22,%22locale%22:%22{authorizationResponse.Request.Locale}%22,%22comparisonItem%22:%5B%7B%22geo%22:%7B%7D,%22complexKeywordsRestriction%22:%7B%22keyword%22:%5B%7B%22type%22:%22BROAD%22,%22value%22:%22{request}%22%7D%5D%7D%7D%5D,%22requestOptions%22:%7B%22property%22:%22%22,%22backend%22:%22{authorizationResponse.Request.RequestOptions.Backend}%22,%22category%22:0%7D%7D"
};
return(await _restClient.GetAsync <GoogleTrendsDataRequest, GoogleTrendsDataResponse>(_googleTrendsSettings.DataEndpoint, googleRequest));
}
