com.djrapitops.plan.delivery.domain.mutators

Class ActivityIndex

java.lang.Object

com.djrapitops.plan.delivery.domain.mutators.ActivityIndex

public class ActivityIndex
extends java.lang.Object

Represents Activity index of a player at a certain date.

Old formula for activity index was not linear and difficult to turn into a query due to conditional multipliers. Thus a new formula was written.

T - Time played after someone is considered active on a particular week t1, t2, t3 - Time played that week

Activity index takes into account last 3 weeks.

Activity for a single week is calculated using A(t) = (1 / (pi/2 * (t/T) + 1)). A(t) is based on function f(x) = 1 / (x + 1), which has property f(0) = 1, decreasing from there, but not in a straight line. You can see the function plotted here https://www.wolframalpha.com/input/?i=1+%2F+(x%2B1)+from+-1+to+2

To fine tune the curve pi/2 is used since it felt like a good curve.

Activity index A is calculated by using the formula: A = 5 - 5 * [A(t1) + A(t2) + A(t3)] / 3

Plot for A and limits https://www.wolframalpha.com/input/?i=plot+y+%3D+5+-+5+*+(1+%2F+(pi%2F2+*+x%2B1))+and+y+%3D1+and+y+%3D+2+and+y+%3D+3+and+y+%3D+3.75+from+-0.5+to+3

New Limits for A would thus be < 1: Inactive > 1: Irregular > 2: Regular > 3: Active > 3.75: Very Active

Field Summary

Fields

Modifier and Type	Field and Description
static double	ACTIVE
static double	IRREGULAR
static double	REGULAR
static double	VERY_ACTIVE

Constructor Summary

Constructors

Constructor and Description
ActivityIndex(DataContainer container, long date, long playtimeMsThreshold)
ActivityIndex(double value, long date)
ActivityIndex(java.util.List<Session> sessions, long date, long playtimeMsThreshold)

Method Summary

Modifier and Type	Method and Description
double	distance(ActivityIndex other)
long	getDate()
static java.lang.String[]	getDefaultGroups()
java.lang.String	getFormattedValue(Formatter<java.lang.Double> formatter)
java.lang.String	getGroup()
static java.lang.String	getGroup(double value)
static java.lang.String[]	getGroups(Locale locale)
double	getValue()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VERY_ACTIVE

public static final double VERY_ACTIVE

See Also:

Constant Field Values

ACTIVE

public static final double ACTIVE

See Also:

Constant Field Values

REGULAR

public static final double REGULAR

See Also:

Constant Field Values

IRREGULAR

public static final double IRREGULAR

See Also:

Constant Field Values

Constructor Detail

ActivityIndex

public ActivityIndex(DataContainer container,
                     long date,
                     long playtimeMsThreshold)

ActivityIndex

public ActivityIndex(java.util.List<Session> sessions,
                     long date,
                     long playtimeMsThreshold)

ActivityIndex

public ActivityIndex(double value,
                     long date)

Method Detail

getDefaultGroups

public static java.lang.String[] getDefaultGroups()

getGroups

public static java.lang.String[] getGroups(Locale locale)

getValue

public double getValue()

getDate

public long getDate()

getFormattedValue

public java.lang.String getFormattedValue(Formatter<java.lang.Double> formatter)

distance

public double distance(ActivityIndex other)

getGroup

public static java.lang.String getGroup(double value)

getGroup

public java.lang.String getGroup()