Module: Eco::API::Common::People::SupervisorHelpers::ClassMethods

Included in:
Eco::API::Common::People::SupervisorHelpers
Defined in:
lib/eco/api/common/people/supervisor_helpers.rb

Instance Method Summary collapse

Instance Method Details

#identify_cyclic_chains(values) ⇒ Array<Array>

Note:

as supervisors_tree will have any entry involved in a cycle at the top, it just checks all the top entries against their offspring

Identifies all the cyclic supervisor chains

Returns:

  • (Array<Array>) —

    the sets of entries that are cyclic



41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/eco/api/common/people/supervisor_helpers.rb', line 41

def identify_cyclic_chains(values)
  raise "Expected non hash Enumerable. Given: #{values.class}" if values.is_a?(Hash)
  return [] unless values.is_a?(Enumerable)

  identify  = proc do |top_sup, offspring, chain = [top_sup]|
    next [] if offspring.empty?
    offspring.each_with_object([]) do |(sup, subordinates), set|
      break set unless set.empty?
      if top_sup.supervisor_id == sup.id
        set.concat(chain, [sup])
      else
        set = identify.call(top_sup, subordinates, chain | [sup])
      end
    end
  end

  supervisors_tree(values).each_with_object([]) do |(top_sup, offspring), sets|
    if (set = identify.call(top_sup, offspring)) && !set.empty?
      sets.push(set)
    end
  end
end

#print_tree(tree, lev: 0) ⇒ Object 



74
75
76
 
# File 'lib/eco/api/common/people/supervisor_helpers.rb', line 74

def print_tree(tree, lev: 0)
  puts tree_to_str(tree)
end

#sort_by_supervisors(values, supervisors_first: true) ⇒ Array<PersonEntry>

Reorders as follows:

  1. supervisors, people with no supervisor or where their supervisor not present
  2. subordinates

Returns:

  • (Array<PersonEntry>) —

    values sorted by supervisors/subordinates



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/eco/api/common/people/supervisor_helpers.rb', line 19

def sort_by_supervisors(values, supervisors_first: true)
  raise "Expected non hash Enumerable. Given: #{values.class}" if values.is_a?(Hash)
  return [] unless values.is_a?(Enumerable)
  roam = proc do |tree|
    [].tap do |out|
      sub_outs = tree.empty?? [] : tree.map {|sup, subtree| roam.call(subtree)}

      tree.each do |sup, subtree|
        sout = subtree.empty?? [] : roam.call(subtree)
        supervisors_first ? sout.unshift(sup) : sout.push(sup)
        out.concat(sout)
      end
    end
  end

  roam.call(supervisors_tree(values))
end

#supervisors_tree(values) ⇒ Hash

Note:

it is resilient to cyclic supervisors (it will just add the last at the top)

Generates a Hash tree structure, where:

  • keys are nodes
  • values are Hash subtree structures of key subordinates

Parameters:

  • values (Enumerable<Object>) —

    of objects with methods: id, external_id and supervisor_id

Returns:

  • (Hash) —

    the tree structure



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
 
# File 'lib/eco/api/common/people/supervisor_helpers.rb', line 85

def supervisors_tree(values) # rubocop:disable Metrics/AbcSize
  raise "Expected non hash Enumerable. Given: #{values.class}" if values.is_a?(Hash)
  return {} unless values.is_a?(Enumerable)
  idx = get_super_indexes(values)

  processed = []
  subtree = proc do |entry, level, toptree|
    if processed.include?(entry)
      next {} unless toptree.key?(entry) && level.positive?
      # needs to be moved as a child
      subnodes = toptree.delete(entry)
      processed.delete(entry)
    end

    subnodes ||= {}.tap do |tree|
      subs = idx[:subordinates].call(entry)
      processed.push(entry)
      next nil unless subs && !subs.empty?
      subs.each do |sub|
        sub_tree = subtree.call(sub, level + 1, toptree)
        tree.merge!(sub_tree)
      end
    end

    {entry => subnodes}
  end

  {}.tap do |tree|
    idx[:by_sup].keys.each do |sup_id|
      if (sup = idx[:supers][sup_id])
        tree.merge!(subtree.call(sup, 0, tree))
      else
        idx[:by_sup][sup_id].each do |sub|
          tree.merge!(subtree.call(sub, 0, tree))
        end
      end
    end
  end
end

#tree_to_str(tree, lev: 0) ⇒ Object 



64
65
66
67
68
69
70
71
72
 
# File 'lib/eco/api/common/people/supervisor_helpers.rb', line 64

def tree_to_str(tree, lev: 0)
  raise "Required Hash tree structure. Given: #{tree.class}" unless tree.is_a?(Hash)
  "".tap do |str|
    tree.each do |entry, subtree|
      str << "#{"  " * lev}+-- #{entry.id || entry.external_id}\n"
      str << tree_to_str(subtree, lev: lev + 1) unless !subtree || subtree.empty?
    end
  end
end