Question

I’m trying to have greentext support for my Rails imageboard (though it should be mentioned that this is strictly a Ruby problem, not a Rails problem)

basically, what my code does is:
1. chop up a post, line by line
2. look at the first character of each line. if it’s a “>”, start the greentexting
3. at the end of the line, close the greentexting
4. piece the lines back together

My code looks like this:

def filter_comment(c) #use for both OP's and comments

c1 = c.content

str1 = '<p class = "unkfunc">' #open greentext
str2 = '</p>' #close greentext

if c1 != nil
arr_lines = c1.split('\n') #split the text into lines

arr_lines.each do |a|
  if a[0] == ">"
    a.insert(0, str1) #add the greentext tag
    a << str2 #close the greentext tag

  end
end

c1 = ""

arr_lines.each do |a|
  strtmp = '\n'
  if arr_lines.index(a) == (arr_lines.size - 1) #recombine the lines into text
    strtmp = ""
  end
  c1 += a + strtmp
end


c2 = c1.gsub("\n", '<br/>').html_safe

end

But for some reason, it isn’t working! I’m having weird things where greentexting only works on the first line, and if you have greentext on the first line, normal text doesn’t work on the second line!

Answer 1

I think the problem lies with the spliting the lines in array.

   names = "Alice \n Bob \n Eve"
   names_a = names.split('\n')
   => ["Alice \n Bob \n Eve"]

Note the the string was not splited when \n was encountered.

Now lets try this

  names = "Alice \n Bob \n Eve"
  names_a = names.split(/\n/)
  => ["Alice ", " Bob ", " Eve"]

or This “\n” in double quotes. (thanks to Eric’s Comment)

  names = "Alice \n Bob \n Eve"
  names_a = names.split("\n")
  => ["Alice ", " Bob ", " Eve"]

This got split in array. now you can check and append the data you want

May be this is what you want.

def filter_comment(c) #use for both OP's and comments

c1 = c.content

str1 = '<p class = "unkfunc">' #open greentext
str2 = '</p>' #close greentext

if c1 != nil
arr_lines = c1.split(/\n/) #split the text into lines

arr_lines.each do |a|
  if a[0] == ">"
    a.insert(0, str1) #add the greentext tag 
     # Use a.insert id you want the existing ">" appended to it <p class = "unkfunc">>
     # Or else just assign a[0] = str1 
    a << str2 #close the greentext tag

  end
end

c1 = arr_lines.join('<br/>')
c2 = c1.html_safe  

end

Hope this helps..!!