Class: Ruty::StandardFilters

Inherits:
FilterCollection show all
Defined in:
lib/ruty/filters.rb

Overview

builtin filter collection

Instance Method Summary collapse

Methods inherited from FilterCollection

each_filter

Instance Method Details

#capitalize(context, value) ⇒ Object

capitalize a string



42
43
44
 
# File 'lib/ruty/filters.rb', line 42

def capitalize context, value
  value.to_s.capitalize
end

#escape(context, value, attribute = false) ⇒ Object

xml escape a string



119
120
121
122
123
124
125
 
# File 'lib/ruty/filters.rb', line 119

def escape context, value, attribute=false
  value = value.to_s.gsub(/&/, '&')\
                    .gsub(/>/, '>')\
                    .gsub(/</, '&lt;')
  value.gsub!(/"/, '&quot;') if attribute
  value
end

#first(context, value) ⇒ Object

get the first item of an array



97
98
99
100
101
102
103
104
105
 
# File 'lib/ruty/filters.rb', line 97

def first context, value
  if value.respond_to?(:first)
    value.first
  elsif value.respond_to?(:[])
    value[0] || value
  else
    value
  end
end

#join(context, value, char = '') ⇒ Object

join an array with a string between the array elements



60
61
62
63
64
65
66
 
# File 'lib/ruty/filters.rb', line 60

def join context, value, char=''
  if value.respond_to?(:join)
    value.join(char)
  else
    value
  end
end

#last(context, value) ⇒ Object

get the last item of an array



108
109
110
111
112
113
114
115
116
 
# File 'lib/ruty/filters.rb', line 108

def last context, value
  if value.respond_to?(:last)
    value.last
  elsif value.respond_to?(:[])
    value[-1] || value
  else
    value
  end
end

#length(context, value) ⇒ Object

return the length of an object



133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/ruty/filters.rb', line 133

def length context, value
  if value.respond_to?(:size)
    value.size
  elsif value.respond_to?(:length)
    value.length
  elsif value.respond_to?(:count)
    value.count
  else
    0
  end
end

#lower(context, value) ⇒ Object

convert a string to lowercase



32
33
34
 
# File 'lib/ruty/filters.rb', line 32

def lower context, value
  value.to_s.downcase
end

#replace(context, value, search, repl = '') ⇒ Object

replace a substring with another if the replacement string isn’t given it replaces it with an empty value.



71
72
73
 
# File 'lib/ruty/filters.rb', line 71

def replace context, value, search, repl=''
  value.to_s.gsub(search.to_s, repl.to_s)
end

#reverse(context, value) ⇒ Object

reverse an item that supports reversing. else return the item unchanged



88
89
90
91
92
93
94
 
# File 'lib/ruty/filters.rb', line 88

def reverse context, value
  if value.respond_to?(:reverse)
    value.reverse
  else
    value
  end
end

#sort(context, value) ⇒ Object

return a sorted version of an array or object that supports sorting. If it does not this function returns the value unchanged.



78
79
80
81
82
83
84
 
# File 'lib/ruty/filters.rb', line 78

def sort context, value
  if value.respond_to?(:sort)
    value.sort
  else
    value
  end
end

#truncate(context, value, n = 80, ellipsis = '...') ⇒ Object

truncate a string down to n characters



47
48
49
50
51
52
53
54
55
56
57
 
# File 'lib/ruty/filters.rb', line 47

def truncate context, value, n=80, ellipsis='...'
  if value
    if (value = value.to_s).length > n
      value[0...n] + ellipsis
    else
      value
    end
  else
    ''
  end
end

#upper(context, value) ⇒ Object

convert a string to uppercase



37
38
39
 
# File 'lib/ruty/filters.rb', line 37

def upper context, value
  value.to_s.upcase
end

#urlencode(context, value) ⇒ Object

urlencode an string



128
129
130
 
# File 'lib/ruty/filters.rb', line 128

def urlencode context, value
  URI.escape(value.to_s)
end