Class: JSONToChart

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

Instance Method Summary collapse

Constructor Details

#initialize(file, id) ⇒ JSONToChart

Returns a new instance of JSONToChart.



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

def initialize(file, id)
  @input = file
  @id = id
end

Instance Method Details

#columns ⇒ Object

Gets titles for columns and type of data then formats for table



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
 
# File 'lib/jsontochart.rb', line 10

def columns
  data = JSON.parse(@input)
  keylist = Array.new
  columnstring = "\n"

  data.each do |l|
    dhash = Hash[*l.flatten]

    dhash.each_key do |key|
      # Check if the key is in the key list and if not add it (and check the type)
      if keylist.include? key
      else 
        keylist.push(key)
        if dhash[key].is_a? Integer
          columnstring = columnstring + "data.addColumn('number', '" + key + "');\n"
        elsif dhash[key].is_a? String
          columnstring = columnstring + "data.addColumn('string', '" + key + "');\n"
        elsif dhash[key] == true || dhash[key] == false
          columnstring = columnstring + "data.addColumn('boolean', '" + key + "');\n"
        else columnstring = columnstring + "data.addColumn('string', '" + key + "');\n"
        end
      end
    end
  end
 
  return columnstring
end

#columntitles ⇒ Object

Gets a list of all the column titles without formatting



39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
 
# File 'lib/jsontochart.rb', line 39

def columntitles
  data = JSON.parse(@input)
  keylist = Array.new

  data.each do |l|
    dhash = Hash[*l.flatten]
    dhash.each_key do |key|
      if keylist.include? key
      else keylist.push(key)
      end
    end
  end

  return keylist
end

#rows(keylist) ⇒ Object

Converts data in JSON to format for table



56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
 
# File 'lib/jsontochart.rb', line 56

def rows(keylist)
  data = JSON.parse(@input)
  savestring = "data.addRows([\n"
  j = 0

  data.each do |l|
    dhash = Hash[*l.flatten]
    tmpstring = "["
    i = 0
    j += 1
    keylist.each do |key|
      i += 1
      # Add data correctly for the type
      if dhash[key] != nil 
        if dhash[key].is_a? String
          tmpstring = tmpstring + "'" + dhash[key].delete("'") + "'"
        elsif dhash[key].is_a? Integer
          tmpstring = tmpstring + dhash[key].to_s
        elsif dhash[key] == true || dhash[key] == false
          tmpstring = tmpstring + dhash[key].to_s
        elsif dhash[key].is_a? Array
          hold = "'"
          z = 0
          dhash[key].each do |i|
            z += 1
            hold = hold + (i.to_s).delete("'")
            if j < dhash[key].length
              hold = hold + ","
            end
          end
          hold = hold + "'"
          tmpstring = tmpstring + hold
        else tmpstring = tmpstring + "'" + dhash[key].to_s + "'"
        end
      else tmpstring = tmpstring + "null"
      end

      # Check if it is the end of the line and append correct characters
      if i == keylist.length then tmpstring = tmpstring + "]"
      else tmpstring = tmpstring + ","
      end
    end
    
    # Check if it is the end of the data or just the line and append correct characters
    if j == data.length then savestring = savestring + tmpstring + "\n]);\n"
    else savestring = savestring + tmpstring + ",\n"
    end
  end
  
  return savestring
end

#table ⇒ Object

Outputs html for table and calls methods to get column titles and data



109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
 
# File 'lib/jsontochart.rb', line 109

def table
  headerhtml = "<html>
<head>
  <script type='text/javascript' src='https://www.google.com/jsapi'></script>
  <script type='text/javascript'>
    google.load('visualization', '1', {packages:['table']});
    google.setOnLoadCallback(drawTable);
    function drawTable() {
      var data = new google.visualization.DataTable();"
    footerhtml = "var table = new
      google.visualization.Table(document.getElementById('"+@id.to_s+"table_div'));
      table.draw(data, {showRowNumber: true});
    }
  </script>
</head>

<body>
  <div id='"+@id.to_s+"table_div'></div>
</body>
</html>"

  return headerhtml + columns + rows(columntitles) + footerhtml
end