Class: Caboose::PageBarGenerator

Inherits:
Object
  • Object
show all
Defined in:
app/models/caboose/page_bar_generator.rb

Direct Known Subclasses

Pager

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(post_get, params = nil, options = nil) ⇒ PageBarGenerator

def initialize(post_get, params = nil, options = nil, &custom_url_vars = nil)



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# File 'app/models/caboose/page_bar_generator.rb', line 27

def initialize(post_get, params = nil, options = nil)
  
  params  = {} if params.nil?
  options = {} if options.nil?
  
	# Note: a few keys are required:
	# base_url, page, itemCount, itemsPerPage
	@original_params = {}
	@params = {}
	@options = {
	  'model'           => '',
		'sort' 			      => '',
		'desc' 			      => 0,
		'base_url'		    => '',
		'page'			      => 1,
		'item_count'		  => 0,
		'items_per_page'  => 10,  			
		'abbreviations'   => {},
		'skip'            => [], # params to skip when printing the page bar  			
		'includes'        => nil # Hash of association includes
		                         # {
		                         #   search_field_1 => [association_name, join_table, column_name],
		                         #   search_field_2 => [association_name, join_table, column_name]
		                         # }  			
	}      
	params.each do |key, val|
	  @original_params[key] = val
	  @params[key] = val 
	end
	options.each { |key, val| @options[key] = val }
	
	#@params.each  { |key, val|  		  
	#  k = @options['abbreviations'].include?(key) ? @options['abbreviations'][key] : nil  		  
	#  @params[key] = post_get[key].nil? ? (k && !post_get[k].nil? ? post_get[k] : val) : post_get[key]  		          
	#}
	
	new_params = {}
	keys_to_delete = []
	@params.each  { |key, val|
	  next if !@options['abbreviations'].has_key?(key)  		  
	  long_key = @options['abbreviations'][key]  		  
     new_params[long_key] = post_get[key] ? post_get[key] : val
     keys_to_delete << key        
	}
	keys_to_delete.each { |k| @params.delete(k) }
	new_params.each { |k,v| @params[k] = v }
	@original_params.each { |k,v| @original_params[k] = post_get[k] ? post_get[k] : v }
	@params.each  { |k,v| @params[k]  = post_get[k] ? post_get[k] : v }        			
	@options.each { |k,v| @options[k] = post_get[k] ? post_get[k] : v }
	
	#@custom_url_vars = custom_url_vars if !custom_url_vars.nil?
	@use_url_params = @options['use_url_params'].nil? ? Caboose.use_url_params : @options['use_url_params']
   
	fix_desc
	set_item_count
end

Instance Attribute Details

#custom_url_vars ⇒ Object

Parameters: params: array of key/value pairs that must include the following: base_url: url without querystring onto which the parameters are added. itemCount: Total number of items.

In addition, the following parameters are not required but may be included in the array: itemsPerPage: Number of items you want to show per page. Defaults to 10 if not present. page: Current page number. Defaults to 0 if not present.



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# File 'app/models/caboose/page_bar_generator.rb', line 24

def custom_url_vars
  @custom_url_vars
end

#options ⇒ Object

Parameters: params: array of key/value pairs that must include the following: base_url: url without querystring onto which the parameters are added. itemCount: Total number of items.

In addition, the following parameters are not required but may be included in the array: itemsPerPage: Number of items you want to show per page. Defaults to 10 if not present. page: Current page number. Defaults to 0 if not present.



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# File 'app/models/caboose/page_bar_generator.rb', line 24

def options
  @options
end

#original_params ⇒ Object

Parameters: params: array of key/value pairs that must include the following: base_url: url without querystring onto which the parameters are added. itemCount: Total number of items.

In addition, the following parameters are not required but may be included in the array: itemsPerPage: Number of items you want to show per page. Defaults to 10 if not present. page: Current page number. Defaults to 0 if not present.



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# File 'app/models/caboose/page_bar_generator.rb', line 24

def original_params
  @original_params
end

#params ⇒ Object

Parameters: params: array of key/value pairs that must include the following: base_url: url without querystring onto which the parameters are added. itemCount: Total number of items.

In addition, the following parameters are not required but may be included in the array: itemsPerPage: Number of items you want to show per page. Defaults to 10 if not present. page: Current page number. Defaults to 0 if not present.



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# File 'app/models/caboose/page_bar_generator.rb', line 24

def params
  @params
end

Instance Method Details

#all_items ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 155

def all_items
 return model_with_includes.where(where).all
end

#association_for_table_name(table_name) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 112

def association_for_table_name(table_name)
 @options['includes'].each do |field, arr|
   return arr[0] if table_name_of_association(arr[0]) == table_name                              
  end
  return false
end

#fix_desc ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 124

def fix_desc
  @options['desc'] = 0 and return if @options['desc'].nil?
  return if @options['desc'] == 1
  return if @options['desc'] == 0
  @options['desc'] = 1 and return if @options['desc'] == 'true' || @options['desc'].is_a?(TrueClass)
  @options['desc'] = 0 and return if @options['desc'] == 'false' || @options['desc'].is_a?(FalseClass)  	  
  @options['desc'] = @options['desc'].to_i 
end

#generate(summary = true) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 167

def generate(summary = true)
    	  
	# Check for necessary parameter values
	return false if !ok(@options['base_url']) # Error: base_url is required for the page bar generator to work.
	return false if !ok(@options['item_count']) # Error: itemCount is required for the page bar generator to work.
	
	# Set default parameter values if not present
	@options['items_per_page'] = 10  if @options["items_per_page"].nil?
	@options['page']           = 1   if @options["page"].nil?		
	
	page = @options["page"].to_i
			
	# Max links to show (must be odd) 
	total_links = 5
	prev_page = page - 1
	next_page = page + 1
	total_pages = (@options['item_count'].to_f / @options['items_per_page'].to_f).ceil
	
	if (total_pages < total_links)
		start = 1
		stop = total_pages			
	else
		start = page - (total_links/2).floor			
		start = 1 if start < 1
		stop = start + total_links - 1
		
		if (stop > total_pages)
			stop = total_pages				
			start = stop - total_links  				
			start = 1 if start < 1
		end
	end
	
	base_url = url_with_vars      
   base_url << (@use_url_params ? "/" : (base_url.include?("?") ? "&" : "?"))      
   keyval_delim = @use_url_params ? "/" : "="
	var_delim    = @use_url_params ? "/" : "&"            
	
	str = ''
	str << "<p>Results: showing page #{page} of #{total_pages}</p>\n" if summary
	
	if (total_pages > 1)
	  str << "<div class='page_links'>\n"
	  if (page > 1)
	    str << "<a href='#{base_url}page#{keyval_delim}#{prev_page}'>Previous</a>"
    end
	  for i in start..stop
	  	if (page != i)
	  	  str << "<a href='#{base_url}page#{keyval_delim}#{i}'>#{i}</a>"
	  	else
	  		str << "<span class='current_page'>#{i}</span>"
	  	end
	  end
	  if (page < total_pages)
	  	str << "<a href='#{base_url}page#{keyval_delim}#{next_page}'>Next</a>"
	  end
	  str << "</div>\n"
   end
   
	return str
end

#item_values(attribute) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 159

def item_values(attribute)
 arr = []
 model_with_includes.where(where).all.each do |m|
   arr << m[attribute]
 end    	
	return arr.uniq
end

#items ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 147

def items        		
	assoc = model_with_includes.where(where)
 	if @options['items_per_page'] != -1
 	  assoc = assoc.limit(limit).offset(offset)
 	end
 	return assoc.reorder(reorder).all
end

#limit ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 392

def limit
  return @options['items_per_page'].to_i
end

#model_with_includes ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 88

def model_with_includes
  m = @options['model'].constantize
	return m if @options['includes'].nil?
	
	associations = []
	# See if any fields that we know have includes have values  		
	@params.each do |k,v|
     next if v.nil? || (v.kind_of?(String) && k.length == 0)
     k.split('_concat_').each do |k2|
       next if !@options['includes'].has_key?(k2)
       associations << @options['includes'][k2][0]
     end
   end        		
   # See if any fields in the sort option are listed in a table_name.column_name format
   if @options['sort']
     @options['sort'].split(',').each do |col|
       tbl_col = col.split('.')
       associations << association_for_table_name(tbl_col[0]) if tbl_col && tbl_col.count > 1          
     end
   end      
	associations.uniq.each { |assoc| m = m.includes(assoc) }
	return m
end

#offset ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 396

def offset
  return (@options['page'].to_i - 1) * @options['items_per_page'].to_i
end

#ok(val) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 133

def ok(val)
   return false if val.nil?
   return true  if val.is_a? Array
   return true  if val.is_a? Hash
   return true  if val.is_a? Integer
   return true  if val.is_a? Fixnum
   return true  if val.is_a? Float
   return true  if val.is_a? Bignum
   return true  if val.is_a? TrueClass
   return true  if val.is_a? FalseClass
   return false if val == ""
   return true
end

#reorder ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 400

def reorder
  str = "id"
  if (!@options['sort'].nil? && @options['sort'].length > 0)
    str = "#{@options['sort']}"
  end
  str << " desc" if @options['desc'] == 1       
  return str
end

#set_item_count ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 84

def set_item_count
  @options['item_count'] = model_with_includes.where(where).count
end

#sortable_links(cols) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 288

def sortable_links(cols)
  base_url = url_with_vars
  base_url << (base_url.include?("?") ? "&" : "?")
	h = {}
	# key = sort field, value = text to display
	cols.each do |sort, text|    		
		arrow = @options['sort'] == sort ? (@options['desc'] == 1 ? ' &uarr;' : ' &darr;') : ''    		
    link = "#{base_url}sort=#{sort}&desc=" + (@options['desc'] == 1 ? "0" : "1")            		
		h[sort] = [link, "#{text}#{arrow}"]
	end
	return h  	
end

#sortable_table_headings(cols) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 273

def sortable_table_headings(cols)
  base_url = url_with_vars
  base_url << (base_url.include?("?") ? "&" : "?")
	str = ''
  
	# key = sort field, value = text to display
	cols.each do |sort, text|    		
		arrow = @options['sort'] == sort ? (@options['desc'] == 1 ? ' &uarr;' : ' &darr;') : ''
		#link = @options['base_url'] + "?#{vars}&sort=#{sort}&desc=" + (@options['desc'] == 1 ? "0" : "1")
    link = "#{base_url}sort=#{sort}&desc=" + (@options['desc'] == 1 ? "0" : "1")            		
		str += "<th><a href='#{link}'>#{text}#{arrow}</a></th>\n"
	end
	return str  	
end

#table_name_of_association(assoc) ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 119

def table_name_of_association(assoc)
   ap assoc
  return @options['model'].constantize.reflect_on_association(assoc.to_sym).class_name.constantize.table_name
end

#url_with_vars ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 229

def url_with_vars()
  if !@custom_url_vars.nil?
    return @custom_url_vars.call @options['base_url'], @params
  end
    	  
  vars = []
  @original_params.each do |k,v|          	    
    next if @options['skip'].include?(k)
    k = @options['abbreviations'].include?(k) ? @options['abbreviations'][k] : k  	      	    
    if v.kind_of?(Array)
      v.each do |v2|  	        
        if @use_url_params
          vars.push("#{k}/#{v2}") if !v2.nil?
        else
          vars.push("#{k}[]=#{v2}") if !v2.nil?
        end
      end
    else  	      
      next if v.nil? || (v.kind_of?(String) && v.length == 0)
      if @use_url_params
        vars.push("#{k}/#{v}")
      else
        vars.push("#{k}=#{v}")
      end  	        
    end  	      	    
  end
  if @use_url_params
    vars.push("sort/#{@options['sort']}")
	  vars.push("desc/#{@options['desc']}")  		
	  #vars.push("page/#{@options['page']}")
   else
     vars.push("sort=#{@options['sort']}")
	  vars.push("desc=#{@options['desc']}")  		
	  #vars.push("page=#{@options['page']}")
	end  			
  return "#{@options['base_url']}" if vars.length == 0
  if @use_url_params
    vars = URI.escape(vars.join('/'))  	    
    return "#{@options['base_url']}/#{vars}"
  end
  vars = URI.escape(vars.join('&'))
  return "#{@options['base_url']}?#{vars}"
end

#where ⇒ Object 



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# File 'app/models/caboose/page_bar_generator.rb', line 301

def where
  sql = []
  values = []
  table = @options['model'].constantize.table_name      
 @params.each do |k,v|
    next if v.nil? || (v.kind_of?(String) && v.length == 0)
    
    col = nil        
    if @options['includes'] && @options['includes'].include?(k)           
      arr = @options['includes'][k]
      col = "#{table_name_of_association(arr[0])}.#{arr[1]}"
    end        
    if k.include?('_concat_')
      #arr = k.split('_concat_')
      #col1 = arr[0]
      #col2 = arr[1]           
      #
      #col2 = col2[0..-5] if col2.ends_with?('_gte')
      #col2 = col2[0..-4] if col2.ends_with?('_gt')                        
      #col2 = col2[0..-5] if col2.ends_with?('_lte')                        
      #col2 = col2[0..-4] if col2.ends_with?('_lt')                                  
      #col2 = col2[0..-4] if col2.ends_with?('_bw')                                              
      #col2 = col2[0..-4] if col2.ends_with?('_ew')
      #col2 = col2[0..-6] if col2.ends_with?('_like')
      #                                  
      #col = "concat(#{col1},' ', #{col2})"
      
      arr = k.split('_concat_')                                         
      arr[arr.count-1] = arr[arr.count-1][0..-5] if k.ends_with?('_gte')
      arr[arr.count-1] = arr[arr.count-1][0..-4] if k.ends_with?('_gt')                        
      arr[arr.count-1] = arr[arr.count-1][0..-5] if k.ends_with?('_lte')                        
      arr[arr.count-1] = arr[arr.count-1][0..-4] if k.ends_with?('_lt')                                  
      arr[arr.count-1] = arr[arr.count-1][0..-4] if k.ends_with?('_bw')                                              
      arr[arr.count-1] = arr[arr.count-1][0..-4] if k.ends_with?('_ew')
      arr[arr.count-1] = arr[arr.count-1][0..-6] if k.ends_with?('_like')
      arr2 = []
      arr.each do |col|
        if @options['includes'] && @options['includes'].include?(col)           
          arr3 = @options['includes'][col]
          arr2 << "#{table_name_of_association(arr3[0])}.#{arr3[1]}"
        else
          arr2 << col
        end            
      end
      col = "concat(#{arr2.join(",' ',")})"
    end
    
    sql2 = ""
    if k.ends_with?('_gte')
      col = "#{table}.#{k[0..-5]}" if col.nil?
      sql2 = "#{col} >= ?"
    elsif k.ends_with?('_gt')
      col = "#{table}.#{k[0..-4]}" if col.nil?
      sql2 = "#{col} > ?"
    elsif k.ends_with?('_lte')
      col = "#{table}.#{k[0..-5]}" if col.nil?
      sql2 = "#{col} <= ?"
    elsif k.ends_with?('_lt')
      col = "#{table}.#{k[0..-4]}" if col.nil?          
      sql2 = "#{col} < ?"
    elsif k.ends_with?('_bw')
      col = "#{table}.#{k[0..-4]}" if col.nil?
      sql2 = "upper(#{col}) like ?"
      v = v.kind_of?(Array) ? v.collect{ |v2| "#{v2}%".upcase } : "#{v}%".upcase          
    elsif k.ends_with?('_ew')
      col = "#{table}.#{k[0..-4]}" if col.nil?
      sql2 = "upper(#{col}) like ?"
      v = v.kind_of?(Array) ? v.collect{ |v2| "%#{v2}".upcase } : "%#{v}".upcase
    elsif k.ends_with?('_like')
      col = "#{table}.#{k[0..-6]}" if col.nil?
      sql2 = "upper(#{col}) like ?"
      v = v.kind_of?(Array) ? v.collect{ |v2| "%#{v2}%".upcase } : "%#{v}%".upcase
    else
      col = "#{table}.#{k}" if col.nil?
      sql2 = "#{col} = ?"
    end
    
    if v.kind_of?(Array)
      sql2 = "(" + v.collect{ |v2| "#{sql2}" }.join(" or ") + ")"
      v.each { |v2| values << v2 }
    else              
      values << v
    end
    sql << sql2                          
 end
 sql_str = sql.join(' and ')
 sql = [sql_str]  	   	  
 values.each { |v| sql << v }  	  
 return sql        	  
end