e9f5d8ece2
- Word import (multi-format: word, word-def, word:def, word|def) - Flashcard filter UI (swipe + keyboard arrows + Space to flip) - SM-2 spaced repetition review queue - Stimulus flashcard controller with 3D flip animation
79 lines
1.8 KiB
Ruby
79 lines
1.8 KiB
Ruby
# frozen_string_literal: true
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class Review < ApplicationRecord
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belongs_to :word
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EASE_MIN = 1.3
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EASE_START = 2.5
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# status: new | known | learning | skipped
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scope :due, -> { where(status: "learning").where("due_at <= ?", Time.current).order(:due_at) }
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scope :upcoming, -> { where(status: "learning").order(:due_at) }
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def mark_known!
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update!(status: "known", last_reviewed_at: Time.current, due_at: nil)
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end
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def mark_learning!
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update!(
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status: "learning",
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interval: 1,
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repetitions: 0,
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ease_factor: EASE_START,
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due_at: 1.day.from_now,
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last_reviewed_at: Time.current
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)
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end
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def mark_skipped!
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update!(status: "skipped", last_reviewed_at: Time.current)
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end
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# SM-2 algorithm: quality 0-5
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# 0-2 = forgot/hard 3-5 = remembered
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def sm2_update!(quality)
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quality = quality.to_i.clamp(0, 5)
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new_ease = [EASE_MIN, ease_factor + 0.1 - (5 - quality) * (0.08 + (5 - quality) * 0.02)].max.round(3)
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if quality < 3
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update!(
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status: "learning",
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repetitions: 0,
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interval: 1,
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ease_factor: new_ease,
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due_at: 1.day.from_now,
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last_reviewed_at: Time.current
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)
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else
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new_reps = repetitions + 1
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new_interval = case repetitions
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when 0 then 1
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when 1 then 6
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else [ (interval * new_ease).ceil, 1 ].max
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end
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update!(
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status: "learning",
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repetitions: new_reps,
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interval: new_interval,
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ease_factor: new_ease,
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due_at: new_interval.days.from_now,
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last_reviewed_at: Time.current
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)
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end
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end
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def due_label
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return "Now" unless due_at
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return "Now" if due_at <= Time.current
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days = ((due_at - Time.current) / 1.day).ceil
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case days
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when 0 then "Today"
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when 1 then "Tomorrow"
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else "#{days} days"
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end
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end
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end
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