/// <summary>
/// Loads table items from DynamoDb
/// - Filter property is used to query against DynamoDb table
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public IEnumerable <T> LoadTableItems <T>(LoadTableItemsRequest request)
{
//LambdaLogger.Log($"Entering: LoadTableItems({ JsonConvert.SerializeObject(request) }");
var response = new List <T>();
try
{
//SearchDocumentsRequest searchDocumentsRequest = CreateSearchDocumentsRequest(request);
//var tableItems = DynamoDbHelper.SearchDocuments(searchDocumentsRequest);
//TODOING: build conditions from request filter
var tableItems = DynamoDbHelper.Scan <T>(request.Conditions);
//TODO: Handle order by expression and record cap here
//Use request to hit dynamodb
//If has an id, then can use dynamodb GetItem, else need to query based on filter
response = tableItems.ToList();
}
catch (Exception exp)
{
LambdaLogger.Log($"Error: { exp }");
//LambdaLogger.Log($"Leaving: LoadTableItems({ JsonConvert.SerializeObject(response) }");
return(response);
}
//LambdaLogger.Log($"Leaving: LoadTableItems({ JsonConvert.SerializeObject(response) }");
return(response);
}
public IEnumerable <T> FindAll(string filter, List <ScanCondition> conditions, string orderByExpression, int recordCap)
{
LambdaLogger.Log($"Entering: FindAll({JsonConvert.SerializeObject(conditions)})");
var request = new LoadTableItemsRequest
{
Filter = filter,
OrderByExpression = orderByExpression,
RecordCap = recordCap,
Table = typeof(T).Name, //Name of table will be name of model
Properties = typeof(T).GetProperties().Select(x => x.Name).ToList(),
Type = typeof(T),
Conditions = conditions
};
var response = _daoContext.LoadTableItems <T>(request);
LambdaLogger.Log($"Load Table Items response: { JsonConvert.SerializeObject(response) }");
return(response);
//if (response != null)
//{
// foreach(var tableItem in response.TableItems)
// {
// yield return ContextResponseEntity(tableItem);
// }
//
}
private static SearchDocumentsRequest CreateSearchDocumentsRequest(LoadTableItemsRequest request)
{
LambdaLogger.Log($"Entering: CreateSearchDocumentsRequest({ JsonConvert.SerializeObject(request) })");
SearchDocumentsRequest searchDocumentsRequest = new SearchDocumentsRequest
{
TableName = request.Table
};
try
{
//Enter the Regex
// - goal here is to map request.Filter to Dictionary<string, List<string>>
request.Filter = request.Filter.ToLower();
List <string> tokens = request.Filter
.Split(new char[] { ' ', ',' })
.ToList();
//Example Case #2
//tokens = ["attr1", "=", "value1", "and", "attr2", "=", "value2"]
//keyFilters = [{"attr1", ["=", "value1"]}, {"attr2", ["=", "value2"]}]
if (tokens.Contains("&&"))
{
var subFilters = request.Filter.Split("&&");
foreach (var subFilter in subFilters)
{
var subTokens = subFilter.Split(new char[] { ' ', ',' })
.ToList();
//TODO: Will check later for ORs ("||") here
ParseBaseQuery(searchDocumentsRequest, subTokens);
}
}
} catch (Exception exp) {
LambdaLogger.Log($"Error: { exp }");
LambdaLogger.Log($"Leaving: CreateSearchDocumentsRequest({ JsonConvert.SerializeObject(searchDocumentsRequest) })");
throw exp;
}
LambdaLogger.Log($"Leaving: CreateSearchDocumentsRequest({ JsonConvert.SerializeObject(searchDocumentsRequest) })");
return(searchDocumentsRequest);
}