package Ġcom . ti ixel . period ict able prof essor . domain . review Ċ Ċ import Ġorg . apache . commons . lang 3 . time . Date Utils Ċ import Ġjava . util . Date Ċ Ċ data Ġclass ĠReview ( ĊĠĠĠ Ġval Ġitem : ĠReviewable , ĊĠĠĠ Ġval Ġface : ĠReviewable Face , ĊĠĠĠ Ġval Ġreview Date : ĠDate , ĊĠĠĠ Ġval Ġperformance : ĠReview Performance , ĊĠĠĠ Ġval Ġnext Due Date : ĠDate , ĊĊĠĠĠ Ġval Ġaggregated Item Difficulty : ĠFloat Ċ ) Ġ{ ĊĊĠĠĠ Ġfun Ġnext Interval (): ĠLong Ġ= Ġnext Due Date . time Ġ- Ġreview Date . time ĊĊĠĠĠ Ġfun Ġnext Over due ( relative To : ĠDate ): ĠFloat Ġ= Ġ( relative To . time Ġ- Ġreview Date . time ). toFloat () Ġ/ Ġnext Interval (). toFloat () ĊĊĠĠĠ Ġfun Ġnext Is Over due ( relative To : ĠDate ): ĠBoolean Ġ= Ġnext Over due ( relative To ) Ġ> Ġ 1 ĊĊĠĠĠ Ġfun Ġnext Is Due So on ( relative To : ĠDate ): ĠBoolean Ġ= Ġnext Over due ( relative To ) Ġ>= Ġ 0 . 7 5 ĊĊĠĠĠ Ġfun Ġnext Is Due On Period ( relative To : ĠDate , Ġgranularity : ĠInt ): ĠBoolean Ġ= ĊĠĠĠĠĠĠĠ ĠDate Utils . truncate ( next Due Date , Ġgranularity ) Ġ== ĠDate Utils . truncate ( relative To , Ġgranularity ) ĊĊĠĠĠ Ġfun Ġaggregate New Review ( fresh Review : ĠF resh Review , Ġag gregator : Ġ( Review , ĠF resh Review ) Ġ-> ĠReview ): ĠReview Ġ{ ĊĠĠĠĠĠĠĠ Ġreturn Ġag gregator ( this , Ġfresh Review ) ĊĠĠĠ Ġ} ĊĊĠĠĠ Ġfun Ġis Known (): ĠBoolean Ġ= Ġnext Interval () Ġ> Ġ 4 0 0 0 0 0 0 0 ĊĊĠĠĠ Ġdata Ġclass ĠUp coming Review ( ĊĠĠĠĠĠĠĠ Ġval Ġitem : ĠReviewable , ĊĠĠĠĠĠĠĠ Ġval Ġface : ĠReviewable Face ĊĠĠĠ Ġ) ĊĊĠĠĠ Ġdata Ġclass ĠF resh Review ( ĊĠĠĠĠĠĠĠ Ġval Ġitem : ĠReviewable , ĊĠĠĠĠĠĠĠ Ġval Ġface : ĠReviewable Face , ĊĠĠĠĠĠĠĠ Ġval Ġreview Date : ĠDate Ġ= ĠDate (), ĊĠĠĠĠĠĠĠ Ġval Ġperformance : ĠReview Performance ĊĠĠĠ Ġ) Ċ }