Class: Vers::VersionRange

Inherits:
Object
  • Object
show all
Defined in:
lib/vers/version_range.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(intervals = []) ⇒ VersionRange

Returns a new instance of VersionRange.



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# File 'lib/vers/version_range.rb', line 10

def initialize(intervals = [])
  @intervals = intervals.compact.reject(&:empty?).sort_by { |i| [i.min || '', i.max || ''] }
  merge_overlapping_intervals!
end

Instance Attribute Details

#intervals ⇒ Object (readonly)

Returns the value of attribute intervals.



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# File 'lib/vers/version_range.rb', line 8

def intervals
  @intervals
end

Class Method Details

.empty ⇒ Object 



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# File 'lib/vers/version_range.rb', line 15

def self.empty
  new([])
end

.exact(version) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 23

def self.exact(version)
  new([Interval.exact(version)])
end

.greater_than(version, inclusive: false) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 27

def self.greater_than(version, inclusive: false)
  new([Interval.greater_than(version, inclusive: inclusive)])
end

.less_than(version, inclusive: false) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 31

def self.less_than(version, inclusive: false)
  new([Interval.less_than(version, inclusive: inclusive)])
end

.unbounded ⇒ Object 



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# File 'lib/vers/version_range.rb', line 19

def self.unbounded
  new([Interval.unbounded])
end

Instance Method Details

#complement ⇒ Object 



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# File 'lib/vers/version_range.rb', line 64

def complement
  return self.class.unbounded if empty?
  return self.class.empty if unbounded?

  result_intervals = []
  
  sorted_intervals = intervals.sort_by { |i| i.min || '' }
  
  first_interval = sorted_intervals.first
  if first_interval.min
    result_intervals << Interval.new(
      max: first_interval.min,
      max_inclusive: !first_interval.min_inclusive
    )
  end
  
  sorted_intervals.each_cons(2) do |curr, next_interval|
    if curr.max && next_interval.min
      comparison = version_compare(curr.max, next_interval.min)
      if comparison < 0 || (comparison == 0 && (!curr.max_inclusive || !next_interval.min_inclusive))
        result_intervals << Interval.new(
          min: curr.max,
          max: next_interval.min,
          min_inclusive: !curr.max_inclusive,
          max_inclusive: !next_interval.min_inclusive
        )
      end
    end
  end
  
  last_interval = sorted_intervals.last
  if last_interval.max
    result_intervals << Interval.new(
      min: last_interval.max,
      min_inclusive: !last_interval.max_inclusive
    )
  end
  
  self.class.new(result_intervals)
end

#contains?(version) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vers/version_range.rb', line 43

def contains?(version)
  intervals.any? { |interval| interval.contains?(version) }
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vers/version_range.rb', line 35

def empty?
  intervals.empty?
end

#exclude(version) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 105

def exclude(version)
  return self if !contains?(version)
  
  result_intervals = []
  
  intervals.each do |interval|
    if interval.contains?(version)
      if interval.min && version_compare(interval.min, version) < 0
        result_intervals << Interval.new(
          min: interval.min,
          max: version,
          min_inclusive: interval.min_inclusive,
          max_inclusive: false
        )
      end
      
      if interval.max && version_compare(version, interval.max) < 0
        result_intervals << Interval.new(
          min: version,
          max: interval.max,
          min_inclusive: false,
          max_inclusive: interval.max_inclusive
        )
      end
    else
      result_intervals << interval
    end
  end
  
  self.class.new(result_intervals)
end

#intersect(other) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 47

def intersect(other)
  result_intervals = []
  
  intervals.each do |interval1|
    other.intervals.each do |interval2|
      intersection = interval1.intersect(interval2)
      result_intervals << intersection unless intersection.empty?
    end
  end
  
  self.class.new(result_intervals)
end

#to_s ⇒ Object 



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# File 'lib/vers/version_range.rb', line 137

def to_s
  return "∅" if empty?
  return intervals.map(&:to_s).join(" ∪ ")
end

#unbounded? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vers/version_range.rb', line 39

def unbounded?
  intervals.length == 1 && intervals.first.unbounded?
end

#union(other) ⇒ Object 



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# File 'lib/vers/version_range.rb', line 60

def union(other)
  self.class.new(intervals + other.intervals)
end