/// <summary>
/// Generates an URL for a given file and action.
/// </summary>
/// <param name="extension">File extension used to identify a correct URL template.</param>
/// <param name="fileIdentifier">Identifier of a file which an object of interest.</param>
/// <param name="accessToken">Access token that will be added to the URL.</param>
/// <param name="action">Action used to identify a correct URL template.</param>
/// <param name="urlSettings">Additional URL settings (if not specified, defaults passed to the class constructor will be used).</param>
/// <returns></returns>
public async Task<string> GetFileUrlAsync(string extension, string fileIdentifier, string accessToken, WopiActionEnum action, WopiUrlSettings urlSettings = null)
{
var combinedUrlSettings = new WopiUrlSettings(urlSettings.Merge(UrlSettings));
var template = await WopiDiscoverer.GetUrlTemplateAsync(extension, action);
if (template != null)
{
// Resolve optional parameters
var url = Regex.Replace(template, @"<(?<name>\w*)=(?<value>\w*)&*>", m => ResolveOptionalParameter(m.Groups["name"].Value, m.Groups["value"].Value, combinedUrlSettings));
url = url.TrimEnd('&');
// Append mandatory parameters
var fileUrl = WopiHostUrl + "/wopi/files/" + fileIdentifier;
url += "&WOPISrc=" + Uri.EscapeDataString(fileUrl);
url += "&access_token=" + Uri.EscapeDataString(accessToken);
return url;
}
return null;
}
