Module: SimpleSearch::ViewHelper

Defined in:
lib/simple_search/view_helper.rb

Instance Method Summary collapse

Instance Method Details

Example:

<%= order_by :name %>
<%= order_by :name, 'Company Name' %>
<%= order_by :name, 'Company Name', :class=>'bold' %>

Raises:



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# File 'lib/simple_search/view_helper.rb', line 9

def order_link(order_to, name=nil, html_options={})
	raise Exception, "must be used in a view" unless (request.fullpath && request.parameters)

	# check if order_by is in an url array
	matches = request.fullpath.match Regexp.new("[\&\?]([a-z_]+)\\[order_by\\]=") # &array[order_by]
	order_arr_key = (matches && matches.length == 2) ? matches[1] : nil

	# get order_by value
	order_by_value = order_arr_key ? request.parameters[order_arr_key][:order_by] : request.parameters[:order_by]
    if order_by_value
      order_by_col, current_order = order_by_value.split(" ")
    else
      order_by_col, current_order = order_to.to_s, ""
    end
    order_to = order_to.to_s.strip
    order_by_col.strip!
    order_by_value.strip! unless order_by_value.nil?

	# determine next order
	next_order = order_to==order_by_col ? {'asc'=>'desc', 'desc'=>'asc'}[current_order] : 'asc'

	# build new url params
    params = request.parameters.clone
	new_url_params = if order_arr_key
		old_arr = params[order_arr_key]
		new_arr = old_arr.merge(:order_by => "#{order_to} #{next_order}")
		params.merge(order_arr_key => new_arr)
    else
		params.merge(:order_by => "#{order_to} #{next_order}" )
	end

	# build link text
	name ||= order_to.gsub(/_/," ").strip.titleize
	order_indicator = order_to==order_by_col ? {'asc'=>'&#9650;', 'desc'=>'&#9660;'}[current_order] : "" 
	link_text = "#{name} #{order_indicator}".strip

	link_to raw(link_text), new_url_params, html_options
end

#page_params(page_num, page_by, page_arr_key = nil) ⇒ Object

Returns a url params in hash for the page number given



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# File 'lib/simple_search/view_helper.rb', line 81

def page_params(page_num, page_by, page_arr_key=nil)
	params = if page_arr_key
		old_arr = request.parameters[page_arr_key].with_indifferent_access
		request.parameters.merge(page_arr_key => old_arr.merge(:page => page_num, :page_by => page_by ) )
	else
		request.parameters.merge(:page => page_num, :page_by => page_by )
	end
    params.with_indifferent_access
end

#page_properties(arel, page_options = {}) ⇒ Object

Returns page related properties in hash



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# File 'lib/simple_search/view_helper.rb', line 51

def page_properties(arel, page_options={})
	total_rows = arel.limit(1000000).offset(0).count

	# check if page is in an url array
	matches = request.fullpath.match Regexp.new("\&([a-z_]+)\\[page|page_by\\]=") # &array[page]
	page_arr_key = (matches && matches.length == 2) ? matches[1] : nil

	# get current page value 
	page = page_arr_key ? request.parameters[page_arr_key][:page] : request.parameters[:page]
	page ||= 1 
    page = page.to_i

	page_by = page_arr_key ? request.parameters[page_arr_key][:page_by] : request.parameters[:page_by]
	page_by ||= 30 
    page_by = page_by.to_i

	last_page = total_rows / page_by.to_i 
	last_page += 1 if total_rows % page_by.to_i != 0
	{
		:total_rows => total_rows,
		:last_page => last_page,
		:current_page => (page || 1).to_i,
		:rows_per_page => (page_by || 30).to_i,
		:page_arr_key => page_arr_key
	}.merge(page_options)
end

#page_url_params(arel, page_props = nil) ⇒ Object

Returns page url params in hash with the page number as key



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# File 'lib/simple_search/view_helper.rb', line 94

def page_url_params(arel, page_props=nil)
	page_props ||= page_properties(arel)
    num_pages  = page_props[:num_pages] || 5 
	num_bf_af = (num_pages-1)/2
	current_page = page_props[:current_page]
	last_page    = page_props[:last_page]

	page_numbers = [1, last_page]
	page_numbers << ([current_page-num_bf_af,1].max..[current_page+num_bf_af,last_page].min).to_a
	page_numbers << last_page
	page_numbers = page_numbers.flatten.uniq.sort

	page_url_params = {}
	for num in page_numbers
		page_url_params[num] = page_params(num, page_props[:rows_per_page], page_props[:page_arr_key])
	end

	page_url_params
end

#page_urls(arel, page_options = {}, http_options = {}) ⇒ Object 



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# File 'lib/simple_search/view_helper.rb', line 114

def page_urls(arel, page_options={}, http_options={})
	page_urls = []
	prev_page = 0	
    page_props = page_properties(arel, page_options)
	page_url_params(arel, page_props ).each { |page, url_params|
		if page.to_i > (prev_page+1) # page number jumped up, need to have some indicator
			page_urls << "<span class='filler'>...</span>"
		end
      new_options = page_props[:current_page] == page ? http_options.merge({:class => 'current'}) : http_options
		page_urls << link_to(page, url_params, new_options)
      prev_page = page
	}
    page_urls
end