internal List <TimelineSegment> Analyze(DateTime startTime, DateTime endTime)
{
Func <Event, DynamicEvent> convertEvent = e => new DynamicEvent(e.StartTime, e.EndTime, e.Data, e.Type);
var events = (from e in this.db.Events
where e.EndTime >= startTime
where e.StartTime <= endTime
select e)
.AsEnumerable()
.Select(convertEvent)
.ToList();
var times = new SortedSet <DateTime>(new[] { startTime, endTime });
times.UnionWith(events.Select(e => e.StartTime));
times.UnionWith(events.Select(e => e.EndTime));
times = times.GetViewBetween(startTime, endTime);
var spans = times.Zip(times.Skip(1), (start, end) => new { startTime = start, endTime = end }).ToList();
var segments = new List <TimelineSegment>();
var rules = this.db.Rules.ToList();
for (int i = 0; i < spans.Count; i++)
{
var span = spans[i];
TimelineSegment segment = null;
Func <Predicate <DynamicEvent>, DynamicEvent> mostRecent = predicate =>
{
return((from e in events
where e.StartTime <= span.startTime
orderby e.StartTime descending
where predicate(e)
select e).FirstOrDefault() ??
(from e in this.db.Events
where e.StartTime <= span.startTime
orderby e.StartTime descending
select e)
.AsEnumerable()
.Select(convertEvent)
.Where(e => predicate(e))
.FirstOrDefault());
};
Func <Predicate <DynamicEvent>, DynamicEvent> current = predicate =>
{
return((from e in events
where e.StartTime <= span.startTime
where e.EndTime >= span.endTime
where predicate(e)
orderby e.StartTime descending, e.EndTime ascending
select e).FirstOrDefault());
};
foreach (var rule in rules)
{
var result = RunRule(rule, span.startTime, span.endTime, events, mostRecent, current);
if (result != null)
{
if (result.StartTime > span.startTime)
{
spans.Add(new { startTime = span.startTime, endTime = result.StartTime });
}
if (result.EndTime < span.endTime)
{
spans.Add(new { startTime = result.EndTime, endTime = span.endTime });
}
segment = result;
break;
}
}
if (segment == null)
{
segment = new TimelineSegment
{
StartTime = span.startTime,
EndTime = span.endTime,
Description = "Unclassified",
Productivity = 0,
IsUnclassified = true,
};
}
segments.Add(segment);
}
Simplify(segments);
return(segments);
}
private TimelineSegment RunRule(Rule rule, DateTime startTime, DateTime endTime, IList <DynamicEvent> events, EventFilter mostRecent, EventFilter current)
{
var ruleFunc = ScriptManager.GetScriptFunc(rule.Expression);
dynamic result;
try
{
result = ruleFunc(startTime, endTime, events, mostRecent, current);
}
catch (TargetInvocationException)
{
// TODO: This should be bubbled up, so that the user can be notified of which rule cause the error.
return(null);
}
if (result == null)
{
return(null);
}
else if (result is bool)
{
return(!result
? null
: new TimelineSegment
{
StartTime = startTime,
EndTime = endTime,
Description = rule.Description,
Productivity = rule.Productivity,
});
}
else if (result is string)
{
return(new TimelineSegment
{
StartTime = startTime,
EndTime = endTime,
Description = result as string,
Productivity = rule.Productivity,
});
}
else
{
var ruleResult = new TimelineSegment();
ruleResult.Description = RetrieveField(result, "Description", rule.Description);
ruleResult.Productivity = RetrieveField(result, "Productivity", rule.Productivity);
ruleResult.StartTime = RetrieveField(result, "StartTime", startTime);
ruleResult.EndTime = RetrieveField(result, "EndTime", endTime);
ruleResult.StartTime = ruleResult.StartTime.Clamp(startTime, endTime);
ruleResult.EndTime = ruleResult.EndTime.Clamp(startTime, endTime);
ruleResult.Description = ruleResult.Description ?? "";
if (ruleResult.Productivity.HasValue)
{
ruleResult.Productivity = ruleResult.Productivity.Value.Clamp(0, 100);
}
if (ruleResult.StartTime >= ruleResult.EndTime)
{
return(null);
}
return(ruleResult);
}
}