308 lines
16 KiB
Ruby
Executable file
308 lines
16 KiB
Ruby
Executable file
require "date"
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module ActionView
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module Helpers
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# The Date Helper primarily creates select/option tags for different kinds of dates and date elements. All of the select-type methods
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# share a number of common options that are as follows:
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#
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# * <tt>:prefix</tt> - overwrites the default prefix of "date" used for the select names. So specifying "birthday" would give
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# birthday[month] instead of date[month] if passed to the select_month method.
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# * <tt>:include_blank</tt> - set to true if it should be possible to set an empty date.
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# * <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
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# method would use simply "date" (which can be overwritten using <tt>:prefix</tt>) instead of "date[month]".
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module DateHelper
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DEFAULT_PREFIX = 'date' unless const_defined?('DEFAULT_PREFIX')
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# Reports the approximate distance in time between two Time objects or integers.
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# For example, if the distance is 47 minutes, it'll return
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# "about 1 hour". See the source for the complete wording list.
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#
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# Integers are interpreted as seconds. So,
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# <tt>distance_of_time_in_words(50)</tt> returns "less than a minute".
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#
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# Set <tt>include_seconds</tt> to true if you want more detailed approximations if distance < 1 minute
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def distance_of_time_in_words(from_time, to_time = 0, include_seconds = false)
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from_time = from_time.to_time if from_time.respond_to?(:to_time)
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to_time = to_time.to_time if to_time.respond_to?(:to_time)
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distance_in_minutes = (((to_time - from_time).abs)/60).round
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distance_in_seconds = ((to_time - from_time).abs).round
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case distance_in_minutes
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when 0..1
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return (distance_in_minutes==0) ? 'less than a minute' : '1 minute' unless include_seconds
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case distance_in_seconds
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when 0..5 then 'less than 5 seconds'
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when 6..10 then 'less than 10 seconds'
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when 11..20 then 'less than 20 seconds'
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when 21..40 then 'half a minute'
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when 41..59 then 'less than a minute'
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else '1 minute'
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end
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when 2..45 then "#{distance_in_minutes} minutes"
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when 46..90 then 'about 1 hour'
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when 90..1440 then "about #{(distance_in_minutes.to_f / 60.0).round} hours"
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when 1441..2880 then '1 day'
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else "#{(distance_in_minutes / 1440).round} days"
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end
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end
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# Like distance_of_time_in_words, but where <tt>to_time</tt> is fixed to <tt>Time.now</tt>.
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def time_ago_in_words(from_time, include_seconds = false)
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distance_of_time_in_words(from_time, Time.now, include_seconds)
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end
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alias_method :distance_of_time_in_words_to_now, :time_ago_in_words
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# Returns a set of select tags (one for year, month, and day) pre-selected for accessing a specified date-based attribute (identified by
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# +method+) on an object assigned to the template (identified by +object+). It's possible to tailor the selects through the +options+ hash,
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# which accepts all the keys that each of the individual select builders do (like :use_month_numbers for select_month) as well as a range of
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# discard options. The discard options are <tt>:discard_year</tt>, <tt>:discard_month</tt> and <tt>:discard_day</tt>. Set to true, they'll
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# drop the respective select. Discarding the month select will also automatically discard the day select. It's also possible to explicitly
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# 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
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# the desired order. Symbols may be omitted and the respective select is not included.
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#
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# Passing :disabled => true as part of the +options+ will make elements inaccessible for change.
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#
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# NOTE: Discarded selects will default to 1. So if no month select is available, January will be assumed.
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#
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# Examples:
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#
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# date_select("post", "written_on")
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# date_select("post", "written_on", :start_year => 1995)
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# date_select("post", "written_on", :start_year => 1995, :use_month_numbers => true,
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# :discard_day => true, :include_blank => true)
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# date_select("post", "written_on", :order => [:day, :month, :year])
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# date_select("user", "birthday", :order => [:month, :day])
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#
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# The selects are prepared for multi-parameter assignment to an Active Record object.
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def date_select(object_name, method, options = {})
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InstanceTag.new(object_name, method, self, nil, options.delete(:object)).to_date_select_tag(options)
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end
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# Returns a set of select tags (one for year, month, day, hour, and minute) pre-selected for accessing a specified datetime-based
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# attribute (identified by +method+) on an object assigned to the template (identified by +object+). Examples:
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#
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# datetime_select("post", "written_on")
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# datetime_select("post", "written_on", :start_year => 1995)
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#
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# The selects are prepared for multi-parameter assignment to an Active Record object.
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def datetime_select(object_name, method, options = {})
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InstanceTag.new(object_name, method, self, nil, options.delete(:object)).to_datetime_select_tag(options)
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end
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# Returns a set of html select-tags (one for year, month, and day) pre-selected with the +date+.
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def select_date(date = Date.today, options = {})
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select_year(date, options) + select_month(date, options) + select_day(date, options)
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end
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# Returns a set of html select-tags (one for year, month, day, hour, and minute) pre-selected with the +datetime+.
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def select_datetime(datetime = Time.now, options = {})
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select_year(datetime, options) + select_month(datetime, options) + select_day(datetime, options) +
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select_hour(datetime, options) + select_minute(datetime, options)
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end
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# Returns a set of html select-tags (one for hour and minute)
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def select_time(datetime = Time.now, options = {})
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h = select_hour(datetime, options) + select_minute(datetime, options) + (options[:include_seconds] ? select_second(datetime, options) : '')
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end
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# Returns a select tag with options for each of the seconds 0 through 59 with the current second selected.
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# The <tt>second</tt> can also be substituted for a second number.
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# Override the field name using the <tt>:field_name</tt> option, 'second' by default.
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def select_second(datetime, options = {})
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second_options = []
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0.upto(59) do |second|
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second_options << ((datetime && (datetime.kind_of?(Fixnum) ? datetime : datetime.sec) == second) ?
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%(<option value="#{leading_zero_on_single_digits(second)}" selected="selected">#{leading_zero_on_single_digits(second)}</option>\n) :
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%(<option value="#{leading_zero_on_single_digits(second)}">#{leading_zero_on_single_digits(second)}</option>\n)
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)
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end
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select_html(options[:field_name] || 'second', second_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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# Returns a select tag with options for each of the minutes 0 through 59 with the current minute selected.
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# Also can return a select tag with options by <tt>minute_step</tt> from 0 through 59 with the 00 minute selected
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# The <tt>minute</tt> can also be substituted for a minute number.
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# Override the field name using the <tt>:field_name</tt> option, 'minute' by default.
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def select_minute(datetime, options = {})
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minute_options = []
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0.step(59, options[:minute_step] || 1) do |minute|
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minute_options << ((datetime && (datetime.kind_of?(Fixnum) ? datetime : datetime.min) == minute) ?
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%(<option value="#{leading_zero_on_single_digits(minute)}" selected="selected">#{leading_zero_on_single_digits(minute)}</option>\n) :
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%(<option value="#{leading_zero_on_single_digits(minute)}">#{leading_zero_on_single_digits(minute)}</option>\n)
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)
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end
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select_html(options[:field_name] || 'minute', minute_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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# Returns a select tag with options for each of the hours 0 through 23 with the current hour selected.
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# The <tt>hour</tt> can also be substituted for a hour number.
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# Override the field name using the <tt>:field_name</tt> option, 'hour' by default.
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def select_hour(datetime, options = {})
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hour_options = []
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0.upto(23) do |hour|
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hour_options << ((datetime && (datetime.kind_of?(Fixnum) ? datetime : datetime.hour) == hour) ?
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%(<option value="#{leading_zero_on_single_digits(hour)}" selected="selected">#{leading_zero_on_single_digits(hour)}</option>\n) :
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%(<option value="#{leading_zero_on_single_digits(hour)}">#{leading_zero_on_single_digits(hour)}</option>\n)
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)
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end
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select_html(options[:field_name] || 'hour', hour_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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# Returns a select tag with options for each of the days 1 through 31 with the current day selected.
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# The <tt>date</tt> can also be substituted for a hour number.
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# Override the field name using the <tt>:field_name</tt> option, 'day' by default.
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def select_day(date, options = {})
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day_options = []
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1.upto(31) do |day|
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day_options << ((date && (date.kind_of?(Fixnum) ? date : date.day) == day) ?
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%(<option value="#{day}" selected="selected">#{day}</option>\n) :
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%(<option value="#{day}">#{day}</option>\n)
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)
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end
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select_html(options[:field_name] || 'day', day_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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# Returns a select tag with options for each of the months January through December with the current month selected.
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# The month names are presented as keys (what's shown to the user) and the month numbers (1-12) are used as values
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# (what's submitted to the server). It's also possible to use month numbers for the presentation instead of names --
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# set the <tt>:use_month_numbers</tt> key in +options+ to true for this to happen. If you want both numbers and names,
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# set the <tt>:add_month_numbers</tt> key in +options+ to true. Examples:
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#
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# select_month(Date.today) # Will use keys like "January", "March"
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# select_month(Date.today, :use_month_numbers => true) # Will use keys like "1", "3"
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# select_month(Date.today, :add_month_numbers => true) # Will use keys like "1 - January", "3 - March"
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#
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# Override the field name using the <tt>:field_name</tt> option, 'month' by default.
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#
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# If you would prefer to show month names as abbreviations, set the
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# <tt>:use_short_month</tt> key in +options+ to true.
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def select_month(date, options = {})
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month_options = []
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month_names = options[:use_short_month] ? Date::ABBR_MONTHNAMES : Date::MONTHNAMES
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1.upto(12) do |month_number|
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month_name = if options[:use_month_numbers]
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month_number
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elsif options[:add_month_numbers]
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month_number.to_s + ' - ' + month_names[month_number]
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else
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month_names[month_number]
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end
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month_options << ((date && (date.kind_of?(Fixnum) ? date : date.month) == month_number) ?
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%(<option value="#{month_number}" selected="selected">#{month_name}</option>\n) :
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%(<option value="#{month_number}">#{month_name}</option>\n)
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)
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end
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select_html(options[:field_name] || 'month', month_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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# 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
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# can be changed using the <tt>:start_year</tt> and <tt>:end_year</tt> keys in the +options+. Both ascending and descending year
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# lists are supported by making <tt>:start_year</tt> less than or greater than <tt>:end_year</tt>. The <tt>date</tt> can also be
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# substituted for a year given as a number. Example:
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#
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# select_year(Date.today, :start_year => 1992, :end_year => 2007) # ascending year values
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# select_year(Date.today, :start_year => 2005, :end_year => 1900) # descending year values
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#
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# Override the field name using the <tt>:field_name</tt> option, 'year' by default.
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def select_year(date, options = {})
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year_options = []
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y = date ? (date.kind_of?(Fixnum) ? (y = (date == 0) ? Date.today.year : date) : date.year) : Date.today.year
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start_year, end_year = (options[:start_year] || y-5), (options[:end_year] || y+5)
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step_val = start_year < end_year ? 1 : -1
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start_year.step(end_year, step_val) do |year|
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year_options << ((date && (date.kind_of?(Fixnum) ? date : date.year) == year) ?
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%(<option value="#{year}" selected="selected">#{year}</option>\n) :
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%(<option value="#{year}">#{year}</option>\n)
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)
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end
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select_html(options[:field_name] || 'year', year_options, options[:prefix], options[:include_blank], options[:discard_type], options[:disabled])
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end
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private
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def select_html(type, options, prefix = nil, include_blank = false, discard_type = false, disabled = false)
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select_html = %(<select name="#{prefix || DEFAULT_PREFIX})
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select_html << "[#{type}]" unless discard_type
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select_html << %(")
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select_html << %( disabled="disabled") if disabled
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select_html << %(>\n)
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select_html << %(<option value=""></option>\n) if include_blank
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select_html << options.to_s
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select_html << "</select>\n"
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end
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def leading_zero_on_single_digits(number)
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number > 9 ? number : "0#{number}"
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end
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end
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class InstanceTag #:nodoc:
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include DateHelper
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def to_date_select_tag(options = {})
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defaults = { :discard_type => true }
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options = defaults.merge(options)
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options_with_prefix = Proc.new { |position| options.merge(:prefix => "#{@object_name}[#{@method_name}(#{position}i)]") }
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date = options[:include_blank] ? (value || 0) : (value || Date.today)
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date_select = ''
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options[:order] = [:month, :year, :day] if options[:month_before_year] # For backwards compatibility
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options[:order] ||= [:year, :month, :day]
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position = {:year => 1, :month => 2, :day => 3}
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discard = {}
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discard[:year] = true if options[:discard_year]
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discard[:month] = true if options[:discard_month]
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discard[:day] = true if options[:discard_day] or options[:discard_month]
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options[:order].each do |param|
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date_select << self.send("select_#{param}", date, options_with_prefix.call(position[param])) unless discard[param]
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end
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date_select
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end
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def to_datetime_select_tag(options = {})
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defaults = { :discard_type => true }
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options = defaults.merge(options)
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options_with_prefix = Proc.new { |position| options.merge(:prefix => "#{@object_name}[#{@method_name}(#{position}i)]") }
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datetime = options[:include_blank] ? (value || nil) : (value || Time.now)
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datetime_select = select_year(datetime, options_with_prefix.call(1))
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datetime_select << select_month(datetime, options_with_prefix.call(2)) unless options[:discard_month]
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datetime_select << select_day(datetime, options_with_prefix.call(3)) unless options[:discard_day] || options[:discard_month]
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datetime_select << ' — ' + select_hour(datetime, options_with_prefix.call(4)) unless options[:discard_hour]
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datetime_select << ' : ' + select_minute(datetime, options_with_prefix.call(5)) unless options[:discard_minute] || options[:discard_hour]
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datetime_select
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end
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end
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class FormBuilder
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def date_select(method, options = {})
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@template.date_select(@object_name, method, options.merge(:object => @object))
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end
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def datetime_select(method, options = {})
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@template.datetime_select(@object_name, method, options.merge(:object => @object))
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end
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end
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end
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end
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