internal static async Task <SqlBotDataEntity> GetSqlBotDataEntity(IAddress key, BotStoreType botStoreType, SqlBotDataContext context)
{
SqlBotDataEntity entity = null;
var query = context.BotData.OrderByDescending(d => d.Timestamp);
switch (botStoreType)
{
case BotStoreType.BotConversationData:
entity = await query.FirstOrDefaultAsync(d => d.BotStoreType == botStoreType &&
d.ChannelId == key.ChannelId &&
d.ConversationId == key.ConversationId);
break;
case BotStoreType.BotUserData:
entity = await query.FirstOrDefaultAsync(d => d.BotStoreType == botStoreType &&
d.ChannelId == key.ChannelId &&
d.UserId == key.UserId);
break;
case BotStoreType.BotPrivateConversationData:
entity = await query.FirstOrDefaultAsync(d => d.BotStoreType == botStoreType &&
d.ChannelId == key.ChannelId &&
d.ConversationId == key.ConversationId &&
d.UserId == key.UserId);
break;
default:
throw new ArgumentException("Unsupported bot store type!");
}
return(entity);
}
async Task <BotData> IBotDataStore <BotData> .LoadAsync(IAddress key, BotStoreType botStoreType, CancellationToken cancellationToken)
{
using (var context = new SqlBotDataContext(_connectionString))
{
try
{
SqlBotDataEntity entity = await SqlBotDataEntity.GetSqlBotDataEntity(key, botStoreType, context);
if (entity == null)
{
// empty record ready to be saved
return(new BotData(eTag: String.Empty, data: null));
}
// return botdata
return(new BotData(entity.ETag, entity.GetData()));
}
catch (System.Data.SqlClient.SqlException err)
{
throw new HttpException((int)HttpStatusCode.InternalServerError, err.Message);
}
}
}
async Task IBotDataStore <BotData> .SaveAsync(IAddress key, BotStoreType botStoreType, BotData botData, CancellationToken cancellationToken)
{
SqlBotDataEntity entity = new SqlBotDataEntity(botStoreType, key.BotId, key.ChannelId, key.ConversationId, key.UserId, botData.Data)
{
ETag = botData.ETag,
ServiceUrl = key.ServiceUrl
};
using (var context = new SqlBotDataContext(_connectionString))
{
try
{
if (string.IsNullOrEmpty(botData.ETag))
{
context.BotData.Add(entity);
}
else if (entity.ETag == "*")
{
var foundData = await SqlBotDataEntity.GetSqlBotDataEntity(key, botStoreType, context);
if (botData.Data != null)
{
if (foundData == null)
{
context.BotData.Add(entity);
}
else
{
foundData.Data = entity.Data;
foundData.ServiceUrl = entity.ServiceUrl;
}
}
else
{
if (foundData != null)
{
context.BotData.Remove(foundData);
}
}
}
else
{
var foundData = await SqlBotDataEntity.GetSqlBotDataEntity(key, botStoreType, context);
if (botData.Data != null)
{
if (foundData == null)
{
context.BotData.Add(entity);
}
else
{
foundData.Data = entity.Data;
foundData.ServiceUrl = entity.ServiceUrl;
foundData.ETag = entity.ETag;
}
}
else
{
if (foundData != null)
{
context.BotData.Remove(foundData);
}
}
}
await context.SaveChangesAsync();
}
catch (System.Data.SqlClient.SqlException err)
{
throw new HttpException((int)HttpStatusCode.InternalServerError, err.Message);
}
}
}