Class: JSONToChoropleth

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

Instance Method Summary collapse

Constructor Details

#initialize(input, location, number) ⇒ JSONToChoropleth

Returns a new instance of JSONToChoropleth.



4
5
6
7
8
 
# File 'lib/jsontochoropleth.rb', line 4

def initialize(input, location, number)
  @input = JSON.parse(input)
  @location = location
  @number = number
end

Instance Method Details

#genfill(type) ⇒ Object 



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/jsontochoropleth.rb', line 10

def genfill(type)
  countryhash = Hash.new

  rangehash = Hash.new
  fullcount = 0
  @input.each do |r|
    fullcount = fullcount + r[@number].to_f
  end

  average = fullcount.to_f/@input.length.to_f

  if type == "percent"
    rangehash["#FFFF99"] = average/3
    rangehash["#FFFF00"] = average/2
    rangehash["#FFA800"] = average
    rangehash["#FF6800"] = average/0.5
    rangehash["#FF0000"] = average/0.25
  elsif type == "full"
    rangehash["#FFFF99"] = average.to_f/3.0
    rangehash["#FFFF00"] = average.to_f/2.0
    rangehash["#FFA800"] = average
    rangehash["#FF6800"] = average*2
    rangehash["#FF0000"] = average*4
  end

  @input.each do |t|
    numusers = t[@number]
    prevv = 0
    count = 0

    rangehash.each do |k,v|
      if (numusers > prevv) && (numusers <= v)
        countryhash[t[@location]] = k
      elsif (count == 4) && (numusers >= v)
        countryhash[t[@location]] = k
      end
      prevv = v
      count = count + 1
    end
  end

  return JSON.pretty_generate(countryhash)
end