imports.rb

require 'zip'

# Check if a variable is set
def is_set(var)
  !var.nil? && !var.to_s.strip.empty? && var != "0"
end

# Splits a string into components and returns them as an array.
# If the string is nil or empty or if the string just consists of delimiters it returns an empty array.
# Params:
# +string+:: The string to split.
# +delimiter+:: The delimiter which should be used to split.
def split_string(string, delimiter)
  if string.nil?
    return []
  end
  return string
    .split(',')
    .map{ |s| s.strip || s }
    .reject { |s| s.empty? }
end

# Uses a section from a changelog and converts them to an array of hashes of issue number and pr title.
# Params:
# +section+:: The section of a changelog representing a release. The format has to be like https://raw.githubusercontent.com/Blackjacx/SHSearchBar/develop/CHANGELOG.md.
def get_issue_numbers_and_titles(section)  
  issues_titles = []
  section.split(/\n/).each do |line|
    issue = line[/\* \[#(.*?)\]\(/m, 1]
    title = line[/\)\: (.*?) - \[@/m, 1].gsub(/\"/, "") # strip double quotations from pr titles
    issues_titles.push( { "issue" => issue, "title" => title } ) if issue && !issue.empty? && title && !title.empty?
  end    
  return issues_titles
end

# Extracting a ZIP file
def unzip(file, destination)
  FileUtils.mkdir_p(destination)

  Zip::File.open(file) do |zip_file|
    zip_file.each do |f|
      fpath = File.join(destination, f.name)
      zip_file.extract(f, fpath) unless File.exist?(fpath)
    end
  end
end