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# frozen_string_literal: true
module Assembly
# This class contains generic methods to operate on any file.
class ObjectFile
include Assembly::ObjectFileable
# Class level method that given an array of strings, return the longest common initial path. Useful for removing a common path from a set of filenames when producing content metadata
#
# @param [Array] strings Array of filenames with paths to operate on
# @return [String] Common part of path of filenames passed in
#
# Example:
# puts Assembly::ObjectFile.common_prefix(['/Users/peter/00/test.tif','/Users/peter/05/test.jp2']) # '/Users/peter/0'
def self.common_path(strings)
return nil if strings.empty?
n = 0
x = strings.last
n += 1 while strings.all? { |s| s[n] && (s[n] == x[n]) }
common_prefix = x[0...n]
if common_prefix[-1, 1] == '/' # check if last element of the common string is the end of a directory
common_prefix # if not, split string along directories, and reject last one
else
"#{common_prefix.split('/')[0..-2].join('/')}/" # if it was, then return the common prefix directly
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems