public IEnumerable<PostDetails> execute(GetPostsRequest the_request)
{
set_request(the_request)
.get_connection();
if (request.first_load)
{
var latest_post = post_repository.Entities.AsEnumerable().LastOrDefault();
if (latest_post != null)
{
request.start_index = latest_post.ID;
request.collection_traversal = CollectionTraversal.Older;
}
}
var query_repository = post_repository.Entities;
if (request.category == GetPostsQueryCategory.ByRadius)
{
query_repository = get_posts_by_radius.execute(new GetPostsByRadiusRequest() { geo_location = connection.GeoLocation });
}
else if (request.category == GetPostsQueryCategory.ByHashTag)
{
var hash_tag = get_hash_tag_by_name.execute(new GetHashTagByNameRequest() { hash_tag_name = request.hash_tag_name });
query_repository = get_posts_by_hash_tag.execute(new GetPostsByHashTagRequest() { hash_tag_id = hash_tag.ID });
}
return
query_repository
.AsEnumerable()
.Where(p => (request.collection_traversal == CollectionTraversal.Older ? p.ID <= request.start_index : p.ID >= request.start_index))
.Order(p => request.category == GetPostsQueryCategory.ByRadius
? p.ID
: p.GeoLocation.Geoposition.Distance(connection.GeoLocation.Geoposition)
, request.category == GetPostsQueryCategory.ByRadius
? request.collection_traversal != CollectionTraversal.Older
:true)
.Take(request.max_results > 0 ? request.max_results : 10)
//.AsEnumerable()
.Select(p => new PostDetails
{
image_id = p.image_id,
text = p.Text,
date = p.DateTime,
post_id = p.ID,
user_id = p.User.ID,
user_display_name = p.User.DisplayName,
long_lat_acc_geo_string = string.Format("{0},{1},{2}", p.GeoLocation.Geoposition.Longitude, p.GeoLocation.Geoposition.Latitude, p.GeoLocation.AccuracyInMetres)
});
}
private GetPosts set_request(GetPostsRequest the_request)
{
request = Guard.IsNotNull(the_request, "the_request");
return this;
}