Class: Availability::RecurrenceExpander

Inherits:
Object
  • Object
show all
Defined in:
lib/availability/recurrence_expander.rb

Overview

Expands recurrences in bounded chunks and enforces occurrence-count limits.

Defined Under Namespace

Classes: LimitError

Constant Summary collapse

MAX_OCCURRENCES_PER_EVENT = 
10_000
MAX_OCCURRENCES_PER_CALENDAR = 
50_000
SECONDLY_CHUNK_SECONDS = 
60 * 60
MINUTELY_CHUNK_SECONDS = 
24 * 60 * 60

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RecurrenceExpander

Returns a new instance of RecurrenceExpander.



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# File 'lib/availability/recurrence_expander.rb', line 13

def initialize
  @calendar_occurrence_count = 0
end

Instance Method Details

#expand(event, range_start:, range_end:) ⇒ Object 



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# File 'lib/availability/recurrence_expander.rb', line 17

def expand(event, range_start:, range_end:)
  occurrences = {}
  cursor = range_start
  chunk_seconds = expansion_chunk_seconds(event, range_start, range_end)

  while cursor < range_end
    chunk_end = [cursor + chunk_seconds, range_end].min
    add_occurrences(occurrences, event, cursor, chunk_end)
    cursor = chunk_end
  end

  occurrences.values
end