1
2
3
4
5
6
7
8
9
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
53
54
55
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
require "date"
module ActionView
module Helpers
# The Date Helper primarily creates select/option tags for different kinds of dates and date elements. All of the select-type methods
# share a number of common options that are as follows:
#
# * <tt>:prefix</tt> - overwrites the default prefix of "date" used for the select names. So specifying "birthday" would give
# birthday[month] instead of date[month] if passed to the select_month method.
# * <tt>:include_blank</tt> - set to true if it should be possible to set an empty date.
# * <tt>:discard_type</tt> - set to true if you want to discard the type part of the select name. If set to true, the select_month
# method would use simply "date" (which can be overwritten using <tt>:prefix</tt>) instead of "date[month]".
module DateHelper
DEFAULT_PREFIX = "date" unless const_defined?("DEFAULT_PREFIX")
# Reports the approximate distance in time between to Time objects. For example, if the distance is 47 minutes, it'll return
# "about 1 hour". See the source for the complete wording list.
def distance_of_time_in_words(from_time, to_time)
distance_in_minutes = ((to_time - from_time) / 60).round
case distance_in_minutes
when 0 then "less than a minute"
when 1 then "1 minute"
when 2..45 then "#{distance_in_minutes} minutes"
when 46..90 then "about 1 hour"
when 90..1440 then "about #{(distance_in_minutes.to_f / 60.0).round} hours"
when 1441..2880 then "1 day"
else "#{(distance_in_minutes / 1440).round} days"
end
end
# Like distance_of_time_in_words, but where <tt>to_time</tt> is fixed to <tt>Time.now</tt>.
def distance_of_time_in_words_to_now(from_time)
distance_of_time_in_words(from_time, Time.now)
end
# Returns a set of select tags (one for year, month, and day) pre-selected for accessing a specified date-based attribute (identified by
# +method+) on an object assigned to the template (identified by +object+). It's possible to tailor the selects through the +options+ hash,
# which both accepts all the keys that each of the individual select builders does (like :use_month_numbers for select_month) and a range of
# discard options. The discard options are <tt>:discard_year</tt>, <tt>:discard_month</tt> and <tt>:discard_day</tt>. Set to true, they'll
# drop the respective select. Discarding the month select will also automatically discard the day select. It's also possible to explicitly
# set the order of the tags using the <tt>:order</tt> option with an array of symbols <tt>:year</tt>, <tt>:month</tt> and <tt>:day</tt> in
# the desired order. Symbols may be omitted and the respective select is not included.
#
# NOTE: Discarded selects will default to 1. So if no month select is available, January will be assumed.
#
# Examples:
#
# date_select("post", "written_on")
# date_select("post", "written_on", :start_year => 1995)
# date_select("post", "written_on", :start_year => 1995, :use_month_numbers => true,
# :discard_day => true, :include_blank => true)
# date_select("post", "written_on", :order => [:day, :month, :year])
# date_select("user", "birthday", :order => [:month, :day])
#
# The selects are prepared for multi-parameter assignment to an Active Record object.
def date_select(object, method, options = {})
InstanceTag.new(object, method, self).to_date_select_tag(options)
end
# Returns a set of select tags (one for year, month, day, hour, and minute) pre-selected for accessing a specified datetime-based
# attribute (identified by +method+) on an object assigned to the template (identified by +object+). Examples:
#
# datetime_select("post", "written_on")
# datetime_select("post", "written_on", :start_year => 1995)
#
# The selects are prepared for multi-parameter assignment to an Active Record object.
def datetime_select(object, method, options = {})
InstanceTag.new(object, method, self).to_datetime_select_tag(options)
end
# Returns a set of html select-tags (one for year, month, and day) pre-selected with the +date+.
def select_date(date = Date.today, options = {})
select_year(date, options) + select_month(date, options) + select_day(date, options)
end
# Returns a set of html select-tags (one for year, month, day, hour, and minute) preselected the +datetime+.
def select_datetime(datetime = Time.now, options = {})
select_year(datetime, options) + select_month(datetime, options) + select_day(datetime, options) +
select_hour(datetime, options) + select_minute(datetime, options)
end
# Returns a set of html select-tags (one for hour and minute)
def select_time(datetime = Time.now, options = {})
h = select_hour(datetime, options) + select_minute(datetime, options) + (options[:include_seconds] ? select_second(datetime, options) : '')
end
# Returns a select tag with options for each of the seconds 0 through 59 with the current second selected.
# The <tt>second</tt> can also be substituted for a second number.
def select_second(datetime, options = {})
second_options = []
0.upto(59) do |second|
second_options << ((datetime.kind_of?(Fixnum) ? datetime : datetime.sec) == second ?
"<option selected=\"selected\">#{leading_zero_on_single_digits(second)}</option>\n" :
"<option>#{leading_zero_on_single_digits(second)}</option>\n"
)
end
select_html("second", second_options, options[:prefix], options[:include_blank], options[:discard_type])
end
# Returns a select tag with options for each of the minutes 0 through 59 with the current minute selected.
# The <tt>minute</tt> can also be substituted for a minute number.
def select_minute(datetime, options = {})
minute_options = []
0.upto(59) do |minute|
minute_options << ((datetime.kind_of?(Fixnum) ? datetime : datetime.min) == minute ?
"<option selected=\"selected\">#{leading_zero_on_single_digits(minute)}</option>\n" :
"<option>#{leading_zero_on_single_digits(minute)}</option>\n"
)
end
select_html("minute", minute_options, options[:prefix], options[:include_blank], options[:discard_type])
end
# Returns a select tag with options for each of the hours 0 through 23 with the current hour selected.
# The <tt>hour</tt> can also be substituted for a hour number.
def select_hour(datetime, options = {})
hour_options = []
0.upto(23) do |hour|
hour_options << ((datetime.kind_of?(Fixnum) ? datetime : datetime.hour) == hour ?
"<option selected=\"selected\">#{leading_zero_on_single_digits(hour)}</option>\n" :
"<option>#{leading_zero_on_single_digits(hour)}</option>\n"
)
end
select_html("hour", hour_options, options[:prefix], options[:include_blank], options[:discard_type])
end
# Returns a select tag with options for each of the days 1 through 31 with the current day selected.
# The <tt>date</tt> can also be substituted for a hour number.
def select_day(date, options = {})
day_options = []
1.upto(31) do |day|
day_options << ((date.kind_of?(Fixnum) ? date : date.day) == day ?
"<option selected=\"selected\">#{day}</option>\n" :
"<option>#{day}</option>\n"
)
end
select_html("day", day_options, options[:prefix], options[:include_blank], options[:discard_type])
end
# Returns a select tag with options for each of the months January through December with the current month selected.
# The month names are presented as keys (what's shown to the user) and the month numbers (1-12) are used as values
# (what's submitted to the server). It's also possible to use month numbers for the presentation instead of names --
# set the <tt>:use_month_numbers</tt> key in +options+ to true for this to happen. If you want both numbers and names,
# set the <tt>:add_month_numbers</tt> key in +options+ to true. Examples:
#
# select_month(Date.today) # Will use keys like "January", "March"
# select_month(Date.today, :use_month_numbers => true) # Will use keys like "1", "3"
# select_month(Date.today, :add_month_numbers => true) # Will use keys like "1 - January", "3 - March"
def select_month(date, options = {})
month_options = []
1.upto(12) do |month_number|
month_name = if options[:use_month_numbers]
month_number
elsif options[:add_month_numbers]
month_number.to_s + " - " + Date::MONTHNAMES[month_number]
else
Date::MONTHNAMES[month_number]
end
month_options << ((date.kind_of?(Fixnum) ? date : date.month) == month_number ?
%(<option value="#{month_number}" selected="selected">#{month_name}</option>\n) :
%(<option value="#{month_number}">#{month_name}</option>\n)
)
end
select_html("month", month_options, options[:prefix], options[:include_blank], options[:discard_type])
end
# Returns a select tag with options for each of the five years on each side of the current, which is selected. The five year radius
# can be changed using the <tt>:start_year</tt> and <tt>:end_year</tt> keys in the +options+. The <tt>date</tt> can also be substituted
# for a year given as a number. Example:
#
# select_year(Date.today, :start_year => 1992, :end_year => 2007)
def select_year(date, options = {})
year_options = []
y = date.kind_of?(Fixnum) ? (y = (date == 0) ? Date.today.year : date) : date.year
default_start_year, default_end_year = y-5, y+5
(options[:start_year] || default_start_year).upto(options[:end_year] || default_end_year) do |year|
year_options << ((date.kind_of?(Fixnum) ? date : date.year) == year ?
"<option selected=\"selected\">#{year}</option>\n" :
"<option>#{year}</option>\n"
)
end
select_html("year", year_options, options[:prefix], options[:include_blank], options[:discard_type])
end
private
def select_html(type, options, prefix = nil, include_blank = false, discard_type = false)
select_html = %(<select name="#{prefix || DEFAULT_PREFIX})
select_html << "[#{type}]" unless discard_type
select_html << %(">\n)
select_html << "<option></option>\n" if include_blank
select_html << options.to_s
select_html << "</select>\n"
return select_html
end
def leading_zero_on_single_digits(number)
number > 9 ? number : "0#{number}"
end
end
class InstanceTag #:nodoc:
include DateHelper
def to_date_select_tag(options = {})
defaults = { :discard_type => true }
options = defaults.merge(options)
options_with_prefix = Proc.new { |position| options.update({ :prefix => "#{@object_name}[#{@method_name}(#{position}i)]" }) }
date = options[:include_blank] ? (value || 0) : (value || Date.today)
date_select = ""
options[:order] = [:month, :year, :day] if options[:month_before_year] # For backwards compatibility
options[:order] ||= [:year, :month, :day]
position = {:year => 1, :month => 2, :day => 3}
discard = {}
discard[:year] = true if options[:discard_year]
discard[:month] = true if options[:discard_month]
discard[:day] = true if options[:discard_day] or options[:discard_month]
options[:order].each do |param|
date_select << self.send("select_#{param}", date, options_with_prefix.call(position[param])) unless discard[param]
end
return date_select
end
def to_datetime_select_tag(options = {})
defaults = { :discard_type => true }
options = defaults.merge(options)
options_with_prefix = Proc.new { |position| options.update({ :prefix => "#{@object_name}[#{@method_name}(#{position}i)]" }) }
datetime = options[:include_blank] ? (value || 0) : (value || Time.now)
datetime_select = select_year(datetime, options_with_prefix.call(1))
datetime_select << select_month(datetime, options_with_prefix.call(2)) unless options[:discard_month]
datetime_select << select_day(datetime, options_with_prefix.call(3)) unless options[:discard_day] || options[:discard_month]
datetime_select << " — " + select_hour(datetime, options_with_prefix.call(4)) unless options[:discard_hour]
datetime_select << " : " + select_minute(datetime, options_with_prefix.call(5)) unless options[:discard_minute] || options[:discard_hour]
return datetime_select
end
end
end
end
|
