Class: Fsrs::Scheduler

Inherits:
Object
  • Object
show all
Includes:
Common, LearningState, NewState, ReviewState, Serialization
Defined in:
lib/fsrs/fsrs.rb

Overview

Scheduler

Defined Under Namespace

Modules: Common, LearningState, NewState, ReviewState, Serialization

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Serialization

included, #to_h

Methods included from Common

#next_difficulty, #next_ds, #next_forget_stability, #next_interval, #next_recall_stability

Methods included from ReviewState

#compute_review_state_intervals_and_schedule, #forgetting_curve, #mean_reversion, #schedule_review_state

Methods included from LearningState

#schedule_learning_relearning_state

Methods included from NewState

#init_difficulty, #init_ds, #init_stability, #schedule_new_state

Constructor Details

#initialize ⇒ Scheduler

Returns a new instance of Scheduler.



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# File 'lib/fsrs/fsrs.rb', line 269

def initialize
  @p = Parameters.new
  @decay = -0.5
  @factor = (0.9**(1 / @decay)) - 1
end

Instance Attribute Details

#decay ⇒ Object

Returns the value of attribute decay.



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# File 'lib/fsrs/fsrs.rb', line 267

def decay
  @decay
end

#factor ⇒ Object

Returns the value of attribute factor.



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# File 'lib/fsrs/fsrs.rb', line 267

def factor
  @factor
end

#p ⇒ Object

Returns the value of attribute p.



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# File 'lib/fsrs/fsrs.rb', line 267

def p
  @p
end

Instance Method Details

#card_elapsed_days(card, now) ⇒ Object 



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# File 'lib/fsrs/fsrs.rb', line 289

def card_elapsed_days(card, now)
  card.state == State::NEW ? 0 : (now - card.last_review).to_i
end

#repeat(card, now) ⇒ Object

Raises:



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# File 'lib/fsrs/fsrs.rb', line 275

def repeat(card, now)
  raise Fsrs::InvalidDateError unless now.utc?

  card = card.clone
  card.elapsed_days = card_elapsed_days(card, now)
  card.last_review = now
  card.reps += 1
  card_scheduler = CardScheduler.new(card)
  card_scheduler.update_state(card.state)

  schedule_card(card_scheduler, card, now)
  card_scheduler.record_log(card, now)
end

#schedule_card(card_scheduler, card, now) ⇒ Object 



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# File 'lib/fsrs/fsrs.rb', line 293

def schedule_card(card_scheduler, card, now)
  case card.state
  when State::NEW
    schedule_new_state(card_scheduler, now)
  when State::LEARNING, State::RELEARNING
    schedule_learning_relearning_state(card_scheduler, now)
  when State::REVIEW
    schedule_review_state(card_scheduler, card, now)
  end
end