I have here is a module that replaces the smilies (like ":-)") as icons:
module Smileize
PATH = "/images/smiles"
SMILES = [/\;\-?p/i, /\$\-?\)/, /8\-?\)/, /\>\:\-?\(/, /\:\-?\*/, /\:\-?o/i, /\:\-?c/i, /\;\-?\)/,
/\:\-?s/i, /\:\-?\|/, /\:\-?p/i, /\:\-?D/i, /\:\-?\?/, /\:\-?\(/, /\:\-?\)/]
def to_icon(key)
return "<img class='smiley' src='#{PATH}/smile#{SMILES.index(key) + 1}.png'/>"
end
module_function :to_icon
end
class String
def to_smile
Smileize::SMILES.each do |smile|
if self =~ smile
self.gsub!(smile, Smileize.to_icon(smile))
end
end
self
end
end
So pictures show that I'm using html_safe, like this:
<%= #message.text.to_smile.html_safe %>
But it does not suit me, because but pictures will be displayed and other tags, too.
My question is: how to display only my smile, ignoring the other tags?
I think you'll need to do it like this:
HTML encode the string.
Perform your substitution.
Mark the final result as HTML safe.
Add a helper something like this:
def expand_smilies(s)
s = ERB::Util::html_escape(s)
Smileize::SMILES.each do |smile|
s.gsub!(smile, Smileize.to_icon(smile))
end
s.html_safe
end
And then in your ERB:
<%= expand_smilies some_text %>
ERB uses ERB::Util::html_escape to encode HTML so using it yourself makes sense if you're targeting ERB. Calling html_safe on a string returns you something that ERB will leave alone when it is HTML encoding things.
Note that there is no usable html_safe! on strings and html_safe returns an ActiveSupport::SafeBuffer rather than a String so you'll have to use a helper rather than monkey patching a new method into String. ActiveSupport does patch an html_safe! method into String but all it does is raise an exception saying "don't do that":
def html_safe!
raise "You can't call html_safe! on a String"
end
Related
I just want to make a simple each loop in my Middleman helper, datas are stored in my page'Frontmatter like this :
dir:
- test
- test2
So in my helper, I try to write my loop :
def translate_directory
current_page.data.dir.each do |dir|
dir
end
end
call my method in my page
<%= translate_directory %>
and this is what's display :
["test", "test2"]
But now, if I make the same loop in my page, write with ERB syntax :
<% current_page.data.dir.each do |x| %>
<%= x %>
<% end %>
the exit is the following
test test2
separated in two strings, so exactly what I want.
EDIT : when I puts the helper'method, it display the two strings in two lines, so in two separated strings. Don't understand why it appear as an array on my browser.
EDIT 2 : a little thing I forgot, I want to translate each word with I18n.translate, like this :
def path_translate
current_page.data.dir.each { |dir| t("paths.#{dir}", locale: lang) }
end
but i can't because the each method doesn't work so I18n can't translate each word.
Because your helper is returning an array not a interpolated string like the ERB template is doing. Try the following for your helper:
def translate_directory
current_page.data.dir.join(' ')
end
My bad. Using .map instead of .each fix the problem, then use .join makes the array a big string.
I'm writing a helper for a small Sinatra app that prints some gaming cards stored as hash in an array.
Every card has this structure:
{ card: 'Ace', suit: :spades, value: 11 }
and the filename of the card image is "spades_11.jpg".
I'm writing a helper to display the cards in my view:
def view(hand)
hand.each do |card|
#print the card
end
end
I need an output like this:
.span2
%img(src="/images/#{card[:suite]}_#{card[:value]}")
How can I insert my Haml code inside the helper block keeping the indentation?
The simplest solution would be to just return the HTML directly from your helper as a string:
def view(hand)
hand.map do |card|
"<div class='span2'><img src='/images/#{card[:suite]}_#{card[:value]}'></div>"
end.join
end
The call it from your Haml with something like:
= view(#the_hand)
You could make use of the haml_tag helper which would let you write something like:
def view(hand)
hand.each do |card|
haml_tag '.span2' do
haml_tag :img, 'src' => "/images/#{card[:suite]}_#{card[:value]}"
end
end
end
Note that haml_tag writes directly to the output rather than returning a string, so you would have to use it with - rather than =:
- view(#the_hand)
or use capture_haml.
This method means your helper depends on Haml. The first method would be usable whatever template language you used, but wouldn’t respect settings like format for whether to end the img tag with />.
If you want to use pure Haml for the markup for each card (this example is simple enough to get away with helpers, but you would certainly want to do this for more complex sections) you could use a partial. Add you Haml code to a file named e.g. view.haml, then you can render it from the containing template, passing in the hand as a local variable:
view.haml:
- hand.each do |card|
.span2
%img(src="/images/#{card[:suite]}_#{card[:value]}")
Parent template:
= haml :view, :locals => {:hand => #the_hand}
You should be able to use a here doc
def view(hand)
hand.each do |card|
<<-HAML
.span2
%img(src="/images/#{card[:suite]}_#{card[:value]}")
HAML
end
end
but note that here docs take the whitespace from the start of the line the are on, so unfortunately this will make your indentation somewhat ugly.
For anything more complicated it probably makes sense to write your haml in a separate .haml file.
def scrape!(url)
Anemone.crawl(url) do |anemone|
anemone.on_pages_like %[/events/detail/.*] do |page|
show = {
headliner: page.doc.at_css('h1.summary').text,
openers: page.doc.at_css('.details h2').text
}
puts show
end
end
end
Writing a scraper in Anemone, which uses Nokogiri under the hood..
Sometime the selector .details h2'returns nothing because its not in the HTML, and calling text on it throws an exception.
I'd like to avoid if/elses all over the place...
if page.doc.at_css('.details h2').empty?
openers: page.doc.at_css('.details h2').text
end
Is there any more eloquent way of handling errors produced by inconsistant mark up? For instance CoffeeScript has the existentional operator person.name?.first(). If the HTML has the element, great make the object and call text on it. If not, move on and dont add it to the hash.
You just need do:
anemone.on_pages_like %[/events/detail/.*] do |page|
if not page.nil?
...#your code
end
end
I have an array #cities = ["Vienna", "Barcelona", "Paris"];
and I am trying to display the individual items with a spacer in between. However it is possible that there is only 1 element in the array, in which case I do not want to display the spacer. And also the array could be empty, in which case I want to display nothing.
For the above array I want the following output:
Vienna
-----
Barcelona
-----
Paris
I use an erb template cityview to apply formatting, css, etc before actually printing the city names. Simplified, it looks like this:
<p><%= #cities[#city_id] %></p>
I have implemented it as follows...
unless #array.empty?
#city_id = 0;
erb :cityview
end
unless #array[1..-1].nil?
#array[1..-1].each_index do |i|
#city_id = i+1;
puts "<p>-------</p>";
erb :cityview
end
end
Is there a better way?
#cities.join("<p>--------</p>")
Edit to address the template
Here I'm assuming that there's an erbs method that returns the rendered template without doing a puts. Returning the string allows easier manipulation and reuse.
#cities.map { |c| #city = c; erb :cityview }.join("<p>--------</p>")
I'd prefer:
erb:
<p><%= #city %></p>
and loop
#array.each_with_index do |e, i|
#city = e
erb :cityview
puts "<p>-------</p>" if i < #array.length - 1
end
I assume you have split the erb, bit because you want to customize it.
If you want to mix HTML with your city names then you'll need to worry about HTML encoding things before you mix in your HTML. Using just the standard library:
require 'cgi'
html = #cities.map { |c| CGI.escapeHTML(c) }.join('<p>-----</p>')
If you're in Rails, then you can use html_escape from ERB::Util and mark the result as safe-for-HTML with html_safe to avoid having to worry about the encoding in your view:
include ERB::Util
html = #cities.map { |c| html_escape(c) }.join('<p>-----</p>').html_safe
The simpler solution would be to use a spacer template.
http://guides.rubyonrails.org/layouts_and_rendering.html#spacer-templates
Useful additional info: I am using the decent_exposure gem so this might be the issue - correcting the code below:
expose(:get_filter_tags) do
if params[:filter_tag_names]
filter_tag_names = Array(params[:filter_tag_names].split(" "))
filter_tags = Array.new
filter_tag_names.each do |f|
t = Tag.find_by_name(f)
filter_tags << t
end
end
end
So, something funny happens when I call this in the view:
query string ?utf8=✓&filter_tag_names=test
<% get_filter_tags.each do |ft| %>
<%= ft.name %>
<% end %>
Error message: undefined method `name' for "test":String
Why is this trying to call name on a string not a Tag object? If I put the following in the view, and have jut one filter_tag_names item
def getfiltertag
Tag.find_by_name(params[:filter_tag_names])
end
#view
<%= getfiltertag.name %>
query string: ?utf8=✓&filter=test
like above then I can call name just fine, so obviously I am doing something wrong to get an array of strings instead of objects. I just don't know what. Any suggestions?
Your problem is that each returns self — so if you write filter_tag_names.each, it returns filter_tag_names. You could fix this by explicitly returning filter_tags, but more idiomatically, you could just rewrite it as:
expose(:get_filter_tags) do
if params[:filter_tag_names]
filter_tag_names = Array(params[:filter_tag_names].split(" "))
filter_tag_names.map {|f| Tag.find_by_name(f) }
end
end
Just as an aside, this method will return nil if there aren't any filter tag names. You may want to do that, or you might want to return an empty collection to avoid exceptions in the calling code.