// GET api/RelevantMarks
public List <Mark> Get(double?longitude, double?latitude, double?proximityThreshhold)
{
List <Mark> relevantMarksByCategoryAndProximity = null;
int relevantCategoriesCode = context.GetUserRelevantCateogiresCode(LoggedUserId);
var relevantMarksByCategory = from mark in context.Marks
where (relevantCategoriesCode & mark.CategoriesCode) != 0
select mark;
if (longitude.HasValue && latitude.HasValue)
{
if (!proximityThreshhold.HasValue)
{
proximityThreshhold = k_DefaultProximityThreshhold;
}
relevantMarksByCategoryAndProximity = new List <Mark>();
foreach (Mark mark in relevantMarksByCategory)
{
Vector userPos = new Vector(longitude.Value, latitude.Value);
Vector markPos = new Vector(mark.Longitude, mark.Latitude);
if (markIsCloseEnough(userPos, markPos, proximityThreshhold.Value))
{
relevantMarksByCategoryAndProximity.Add(mark);
}
}
}
else
{
relevantMarksByCategoryAndProximity = relevantMarksByCategory.ToList();
}
return(relevantMarksByCategoryAndProximity);
}
// GET api/ClosestMark
public async Task <Mark> Get(double?latitude, double?longitude)
{
Mark closestMark = null;
if (latitude != null && longitude != null)
{
m_UserLatitude = latitude.Value;
m_UserLongitude = longitude.Value;
}
try
{
int relevantCategoriesCode = context.GetUserRelevantCateogiresCode(LoggedUserId);
IEnumerable <string> seenMarksIds = from userMarkExperiences in context.UserMarkExperiences
where userMarkExperiences.UserId == LoggedUserId
select userMarkExperiences.MarkId;
IEnumerable <Mark> unseenRelevantMarks = from mark in context.Marks
where (relevantCategoriesCode & mark.CategoriesCode) != 0 &&
!seenMarksIds.Contains(mark.Id)
select mark;
if (unseenRelevantMarks.Count() != 0)
{
closestMark = unseenRelevantMarks.OrderByDescending((mark) => distanceFromUserKm(mark)).Last();
double distanceFromClosestMark = distanceFromUserKm(closestMark);
if (distanceFromClosestMark > 0.04)
{
// Closest mark is too far
closestMark = null;
}
else
{
// Insert a UserMarkExperience to avoid notifying this user about this mark again
await context.InsertUserMarkExperience(LoggedUserId, closestMark.Id);
}
}
}
catch (Exception e)
{
LogTools.LogException(e);
}
return(closestMark);
}
