/// <summary>
/// Creates the predictions URI.
/// </summary>
/// <returns>The predictions URI.</returns>
/// <param name="newTextValue">New text value.</param>
/// <param name="apiKey">The API key</param>
/// <param name="bias">The location bias (can be NULL)</param>
/// <param name="components">The components (can be NULL)</param>
/// <param name="type">Filter for the returning types </param>
/// <param name="language">The language of the results</param>
private static string CreatePredictionsUri(string newTextValue, string apiKey, LocationBias bias, Components components, PlaceType type, GoogleAPILanguage language)
{
var url = "https://maps.googleapis.com/maps/api/place/autocomplete/json";
var input = Uri.EscapeUriString(newTextValue);
var pType = PlaceTypeValue(type);
var constructedUrl = $"{url}?input={input}&types={pType}&key={apiKey}";
if (bias != null)
{
constructedUrl = constructedUrl + bias;
}
if (components != null)
{
constructedUrl += components;
}
if (language != GoogleAPILanguage.Unset)
{
constructedUrl += "&Language=" + GoogleAPILanguageHelper.ToAPIString(language);
}
return(constructedUrl);
}
/// <summary>
/// Calls the Google Places API to retrieve autofill suggestions
/// </summary>
/// <returns>The places.</returns>
/// <param name="newTextValue">New text value.</param>
/// <param name="apiKey">The API key</param>
/// <param name="bias">The location bias (can be NULL)</param>
/// <param name="components">The components (can be NULL)</param>
/// <param name="type">Filter for the returning types </param>
/// <param name="language">The language of the results</param>
public static async Task <AutoCompleteResult> GetPlaces(string newTextValue, string apiKey, LocationBias bias, Components components, PlaceType type, GoogleAPILanguage language)
{
if (string.IsNullOrEmpty(apiKey))
{
throw new Exception("You have not assigned a Google API key to PlacesBar");
}
try
{
var requestURI = CreatePredictionsUri(newTextValue, apiKey, bias, components, type, language);
var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Get, requestURI);
var response = await client.SendAsync(request);
if (!response.IsSuccessStatusCode)
{
Debug.WriteLine("PlacesBar HTTP request denied.");
return(null);
}
var result = await response.Content.ReadAsStringAsync();
if (result == "ERROR")
{
Debug.WriteLine("PlacesSearchBar Google Places API returned ERROR");
return(null);
}
return(AutoCompleteResult.FromJson(JObject.Parse(result)));
}
catch (Exception ex)
{
Debug.WriteLine("PlacesBar HTTP issue: {0} {1}", ex.Message, ex);
return(null);
}
}
