private async Task <HttpRequestMessage> QueryToHttpRequest(QueryBase queryBase)
{
switch (queryBase)
{
case FetchExpression query:
{
using (var input = new StringReader(query.Query))
using (var reader = XmlReader.Create(input))
{
reader.ReadToFollowing("entity");
var entityName = reader.GetAttribute("name");
var metadata = await GetEntityMetadata(entityName);
var entity = metadata.LogicalCollectionName;
return(new HttpRequestMessage(HttpMethod.Get, $"{_baseUrl}/{entity}?fetchXml={query.Query}"));
}
}
case QueryExpression query:
{
var metadata = await GetEntityMetadata(query.EntityName);
var entity = metadata.LogicalCollectionName;
var visitor = new ODataQueryExpressionVisitor();
visitor.Visit(query);
return(new HttpRequestMessage(HttpMethod.Get, $"{_baseUrl}/{entity}?{visitor.QueryString}"));
}
case QueryByAttribute query:
{
var queryExpression = new QueryExpression(query.EntityName)
{
TopCount = query.TopCount,
PageInfo = query.PageInfo,
ColumnSet = query.ColumnSet
};
queryExpression.Orders.AddRange(query.Orders);
for (var i = 0; i < query.Attributes.Count; i++)
{
var attribute = query.Attributes[i];
var value = query.Values[i];
queryExpression.Criteria.AddCondition(attribute, ConditionOperator.Equal, value);
}
return(await QueryToHttpRequest(queryExpression));
}
default:
{
throw new NotSupportedException("Query type is not supported.");
}
}
}
private async Task <HttpRequestMessage> ToHttpRequest(OrganizationRequest orgRequest)
{
switch (orgRequest)
{
case ExecuteMultipleRequest request:
{
var message = new HttpRequestMessage(HttpMethod.Post, $"{_baseUrl}/$batch");
var batchId = $"batch_{Guid.NewGuid().ToString("N")}";
var batch = new MultipartContent("mixed", batchId);
foreach (var req in request.Requests)
{
var changesetId = $"changeset_{Guid.NewGuid().ToString("N")}";
var changeset = new MultipartContent("mixed", changesetId);
changeset.Headers.Remove("Content-Type");
changeset.Headers.Add("Content-Type", $"multipart/mixed;boundary={changesetId}");
var change = await ToHttpRequest(req);
var content = new HttpMessageContent(change);
content.Headers.Remove("Content-Type");
content.Headers.Add("Content-Type", $"application/http");
content.Headers.Add("Content-Transfer-Encoding", "binary");
content.Headers.Add("Content-ID", "1");
changeset.Add(content);
batch.Add(changeset);
}
message.Content = batch;
return(message);
}
case CreateRequest request:
{
var target = request.Target;
var metadata = await GetEntityMetadata(target.LogicalName);
var entitySetName = metadata.LogicalCollectionName;
var message = new HttpRequestMessage(HttpMethod.Post, $"{_baseUrl}/{entitySetName}");
var body = JsonConvert.SerializeObject(request.Target.Attributes.ToDictionary(x => x.Key, x => x.Value));
message.Content = new StringContent(body, Encoding.UTF8, "application/json");
return(message);
}
case RetrieveRequest request:
{
var target = request.Target;
var metadata = await GetEntityMetadata(target.LogicalName);
var entity = metadata.LogicalCollectionName;
var query = new QueryExpression(target.LogicalName)
{
ColumnSet = request.ColumnSet
};
var visitor = new ODataQueryExpressionVisitor();
visitor.Visit(query);
return(new HttpRequestMessage(HttpMethod.Get, $"{_baseUrl}/{entity}({target.Id})?{visitor.QueryString}"));
}
case RetrieveMultipleRequest request:
{
return(await QueryToHttpRequest(request.Query));
}
case DeleteRequest request:
{
var target = request.Target;
var metadata = await GetEntityMetadata(target.LogicalName);
var entity = metadata.LogicalCollectionName;
return(new HttpRequestMessage(HttpMethod.Delete, $"{_baseUrl}/{entity}({target.Id})"));
}
}
return(null);
}
