Module: Knj::Strings

Defined in:
lib/knj/strings.rb

Overview

This module contains various methods to escape, change or treat strings.

Class Method Summary collapse

Class Method Details

.const_get_full(str) ⇒ Object

Returns the module from the given string - even if formed as SomeClass::SomeNewClass.



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# File 'lib/knj/strings.rb', line 220

def self.const_get_full(str)
  raise "Invalid object: '#{str.class.name}'." if !str.is_a?(String) and !str.is_a?(Symbol)
  module_use = Kernel
  
  str.to_s.scan(/(.+?)(::|$)/) do |match|
    module_use = module_use.const_get(match[0])
  end
  
  return module_use
end

.email_str_safe(str) ⇒ Object

Email content may only be 1000 characters long. This method shortens them gracefully.



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# File 'lib/knj/strings.rb', line 232

def self.email_str_safe(str)
  str = str.to_s
  strcopy = "#{str}"
  
  str.each_line("\n") do |substr_orig|
    substr = "#{substr_orig}"
    next if substr.length <= 1000
    
    lines = []
    
    while substr.length > 1000 do
      whitespace_index = substr.rindex(/\s/, 1000)
      
      if whitespace_index == nil
        lines << substr.slice(0, 1000)
        substr = substr.slice(1000, substr.length)
      else
        lines << substr.slice(0, whitespace_index + 1)
        substr = substr.slice(whitespace_index + 1, substr.length)
      end
    end
    
    lines << substr
    
    strcopy.gsub!(/^#{Regexp.escape(substr_orig)}$/, lines.join("\n"))
  end
  
  return strcopy
end

.float_as_human_logic(floatval) ⇒ Object

Returns a float as human locaically readable. 1.0 will be 1, 1.5 will be 1.5 and so on.



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# File 'lib/knj/strings.rb', line 263

def self.float_as_human_logic(floatval)
  raise "Not a float." if !floatval.is_a?(Float)
  
  float_s = floatval.to_s
  parts = float_s.split(".")
  if parts[1].to_i > 0
    return float_s
  else
    return parts[0].to_s
  end
end

.html_links(str, args = {}) ⇒ Object

Search for what looks like links in a string and does something with it based on block given or arguments given.

Examples

str = “asd asd asd asdjklqwejqwer www.google.com asdfas df asf” Knj::Strings.html_links(str) #=> “asd asd asd asdjklqwejqwer <a href="www.google.com">www.google.com</a> asdfas df asf” Knj::Strings.html_links(str){ |data| str.gsub(data[0], “!!!#[1]!!!”)} #=> “asd asd asd asdjklqwejqwer !!!www!!! asdfas df asf”



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# File 'lib/knj/strings.rb', line 155

def self.html_links(str, args = {})
  Knj::Web.html(str).scan(/(http:\/\/([A-z]+)\S*\.([A-z]{2,4})(\S+))/) do |match|
    if block_given?
      str = yield(:str => str, :args => args, :match => match)
    else
      if args["target"]
        html = "<a target=\"#{args["target"]}\""
      else
        html = "<a"
      end
      
      html << " href=\"#{match[0]}\">#{match[0]}</a>"
      str = str.gsub(match[0], html)
    end
  end
  
  return str
end

.human_time_str_to_secs(str) ⇒ Object

Turns a human readable time-string into a number of seconds.



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# File 'lib/knj/strings.rb', line 288

def self.human_time_str_to_secs(str)
  match = str.match(/^\s*(\d+)\s*:\s*(\d+)\s*:\s*(\d+)\s*/)
  raise "Could not match string: '#{str}'." if !match
  
  hours = match[1].to_i
  minutes = match[2].to_i
  secs = match[3].to_i
  
  total = (hours * 3600) + (minutes * 60) + secs
  return total
end

.is_a?(obj, str) ⇒ Boolean

Same as ‘Class#is_a?’ but takes a string instead of the actual class. Then it doesnt get autoloaded or anything like that. It can also test against an array containing string-class-names.

Returns:

  • (Boolean) 


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# File 'lib/knj/strings.rb', line 301

def self.is_a?(obj, str)
  obj_class = obj.class
  str = str.to_s if !str.is_a?(Array)
  
  loop do
    if str.is_a?(Array)
      return true if str.index(obj_class.name.to_s) != nil
    else
      return true if obj_class.name.to_s == str
    end
    
    obj_class = obj_class.superclass
    break if !obj_class
  end
  
  return false
end

.is_email?(str) ⇒ Boolean

Returns boolean if the strings is a correctly formatted email: [email protected].

Returns:

  • (Boolean) 


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# File 'lib/knj/strings.rb', line 97

def self.is_email?(str)
  return true if str.to_s.match(/^\S+@\S+\.\S+$/)
  return false
end

.is_phonenumber?(str) ⇒ Boolean

Returns boolean if the string is a correctly formatted phonenumber as: +4512345678.

Returns:

  • (Boolean) 


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# File 'lib/knj/strings.rb', line 103

def self.is_phonenumber?(str)
  return true if str.to_s.match(/^\+\d{2}\d+$/)
  return false
end

.is_regex?(str) ⇒ Boolean

Returns true if given string is regex-compatible.

Returns:

  • (Boolean) 


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# File 'lib/knj/strings.rb', line 18

def self.is_regex?(str)
  if str.to_s.match(/^\/(.+)\/(i|m|x|)$/)
    return true
  else
    return false
  end
end

.js_safe(str, args = {}) ⇒ Object 



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# File 'lib/knj/strings.rb', line 108

def self.js_safe(str, args = {})
  str = "#{str}"
  
  if args[:quotes_to_single]
    str.gsub!('"', "'")
  end
  
  str = str.gsub("\r", "").gsub("\n", "\\n").gsub("'", "\\\\'")
  
  if !args.key?(:quotes) or args[:quotes]
    str.gsub!('"', '\"')
  end
  
  return str
end

.regex(str) ⇒ Object

Returns a Regexp-object from the string formatted as what you would give to Php’s preg_match.



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# File 'lib/knj/strings.rb', line 27

def self.regex(str)
  first_char = str[0, 1]
  raise "First char should be '/' but wasnt: '#{first_char}'." if first_char != "/"
  first_pos = 1
  
  second_pos = str.rindex("/")
  pattern = str[first_pos, second_pos - 1]
  
  flags = str[second_pos + 1, str.length].to_s
  arg_two = 0
  
  if flags
    flags.length.times do |i|
      arg = flags[i, 1]
      
      case arg
        when "i"
          arg_two |= Regexp::IGNORECASE
        when "m"
          arg_two |= Regexp::MULTILINE
        when "x"
          arg_two |= Regexp::EXTENDED
        when "U"
          raise ArgumentError, "Ruby does (as far as I know) not support the 'U'-modifier. You should rewrite your regex with non-greedy operators such as '(\d+?)' instead for: '#{str}'."
        else
          raise "Unknown argument: '#{arg}'."
      end
    end
  end
  
  regex = Regexp.new(pattern, arg_two)
  
  return regex
end

.searchstring(string, &block) ⇒ Object

Partens a string up in blocks for whatever words can be used to search for. Supports a block or returns an array.



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# File 'lib/knj/strings.rb', line 63

def self.searchstring(string, &block)
  words = [] if !block
  string = string.to_s
  
  matches = string.scan /(\"(.+?)\")/
  matches.each do |matcharr|
    word = matcharr[1]
    
    if word and word.length > 0
      if block
        yield(matcharr[1])
      else
        words << matcharr[1]
      end
      
      string = string.gsub(matcharr[0], "")
    end
  end
  
  string.split(/\s/).each do |word|
    if word and word.length > 0
      if block
        yield(word)
      else
        words << word
      end
    end
  end
  
  return nil if block
  return words
end

.secs_to_human_time_str(secs) ⇒ Object

Returns a human readable time-string from a given number of seconds.



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# File 'lib/knj/strings.rb', line 276

def self.secs_to_human_time_str(secs)
  secs = secs.to_i
  hours = (secs.to_f / 3600.0).floor.to_i
  secs = secs - (hours * 3600)
  
  mins = (secs.to_f / 60).floor.to_i
  secs = secs - (mins * 60)
  
  return "#{"%02d" % hours}:#{"%02d" % mins}:#{"%02d" % secs}"
end

.shorten(str, maxlength) ⇒ Object

Shortens a string to maxlength and adds “…” if it was shortened.

Examples

Knj::Strings.shorten(“Kasper Johansen”, 6) #=> “Kasper…”



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# File 'lib/knj/strings.rb', line 144

def self.shorten(str, maxlength)
  str = str.to_s
  str = str.slice(0..(maxlength - 1)).strip + "..." if str.length > maxlength
  return str
end

.strip(origstr, args) ⇒ Object

Strips various given characters from a given string.

Examples

Knj::Strings.strip(“…kasper…”, => false, :left => true, :strips => [“.”, “,”]) #=> “kasper…”



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# File 'lib/knj/strings.rb', line 177

def self.strip(origstr, args)
  newstr = "#{origstr}"
  
  if !args.key?(:right) or args[:right]
    loop do
      changed = false
      args[:strips].each do |str|
        len = str.length
        endstr = newstr.slice(-len, len)
        next if !endstr
        
        if endstr == str
          changed = true
          newstr = newstr.slice(0..newstr.length-len-1)
        end
      end
      
      break if !changed
    end
  end
  
  if !args.key?(:left) or args[:left]
    loop do
      changed = false
      args[:strips].each do |str|
        len = str.length
        endstr = newstr.slice(0, len)
        next if !endstr
        
        if endstr == str
          changed = true
          newstr = newstr.slice(len..-1)
        end
      end
      
      break if !changed
    end
  end
  
  return newstr
end

.unixsafe(string) ⇒ Object

Alias for UnixSafe.



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# File 'lib/knj/strings.rb', line 13

def self.unixsafe(string)
  return Knj::Strings.UnixSafe(string)
end

.UnixSafe(tha_string) ⇒ Object

Returns a string that is safe to use on the command line.



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# File 'lib/knj/strings.rb', line 8

def self.UnixSafe(tha_string)
  return tha_string.to_s.gsub(" ", "\\ ").gsub("&", "\&").gsub("(", "\\(").gsub(")", "\\)").gsub('"', '\"').gsub("\n", "\"\n\"").gsub(":", "\\:").gsub('\'', "\\\\'").gsub("`", "\\\\`")
end

.yn_str(value, str_yes = "Yes", str_no = "No") ⇒ Object

Returns ‘Yes’ or ‘No’ based on a value. The value can be 0, 1, yes, no, true or false.



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# File 'lib/knj/strings.rb', line 125

def self.yn_str(value, str_yes = "Yes", str_no = "No")
  value = value.to_i if Php4r.is_numeric(value)
  value_s = value.to_s
  
  if value.is_a?(Integer)
    if value == 0
      return str_no
    else
      return str_yes
    end
  end
  
  return str_no if !value or value_s == "no" or value_s == "false" or value_s == ""
  return str_yes
end