/// <summary>
/// Asynchronously generates a meme with the characteristics passed in
/// </summary>
/// <param name="memeName">name of the meme</param>
/// <param name="firstLine">top line</param>
/// <param name="secondLine">bottom line</param>
/// <returns>the url of the corresponding meme</returns>
public async Task <string> Generate(string memeName, string firstLine, string secondLine, string thirdLine = "")
{
await EnsureMemeIdCache();
string memeId = _memeIdCache.GetMemeIdFromName(memeName);
if (string.IsNullOrEmpty(firstLine))
{
firstLine = " ";
}
if (string.IsNullOrEmpty(secondLine))
{
secondLine = " ";
}
string queryString = (thirdLine == "") ? GenerateQueryString(memeId, firstLine, secondLine) : GenerateQueryString(memeId, firstLine, secondLine, thirdLine);
ImgFlipResponse flipResponse = await CallImgFlipApi(queryString);
if (!flipResponse.Success)
{
return(flipResponse.ErrorMessage);
}
return(flipResponse.Data.Url);
}
/// <summary>
/// Ensures the cache is populated
/// </summary>
private async Task EnsureMemeIdCache()
{
if (_memeIdCache == null)
{
_memeIdCache = new MemeIdCache();
ImgFlipResponse flipResponse = await CallImgFlipApi("https://api.imgflip.com/get_memes");
if (!flipResponse.Success)
{
throw new InvalidOperationException(flipResponse.ErrorMessage);
}
_memeIdCache.Refresh(flipResponse.Data.Memes);
}
}