Class: Nearline::Models::FileContent

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/nearline/file_content.rb

Overview

Has the responsibility of identifying and verifying content

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.fresh_entry ⇒ Object 



10
11
12
13
14
 
# File 'lib/nearline/file_content.rb', line 10

def self.fresh_entry
  file_content = FileContent.new
  file_content.save!
  file_content
end

Instance Method Details

#orphan_check ⇒ Object 



16
17
18
19
20
21
22
23
24
 
# File 'lib/nearline/file_content.rb', line 16

def orphan_check
  if (self.archived_files.size == 1)
    sequences.each do |s|
      s.destroy
      s.block.orphan_check
    end
    self.destroy
  end
end

#restore_to(io) ⇒ Object 



33
34
35
36
37
38
 
# File 'lib/nearline/file_content.rb', line 33

def restore_to(io)
  sequences.each do |seq|
    block = Block.find(seq.block_id)
    io.write(block.content)
  end
end

#unique_fingerprint?(key) ⇒ Boolean

Returns:

  • (Boolean) 


26
27
28
29
30
31
 
# File 'lib/nearline/file_content.rb', line 26

def unique_fingerprint?(key)
  hit = FileContent.connection.select_one(
    "select id from file_contents where fingerprint='#{key}'"
  )
  return hit.nil?
end

#verified? ⇒ Boolean

Returns:

  • (Boolean) 


40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/nearline/file_content.rb', line 40

def verified?
  if (!self.verified_at.nil?)
    return true
  end
  whole_file_hash = Digest::SHA1.new
  sequences.each do |seq|
    block = Block.find(seq.block_id)
    whole_file_hash.update(block.content)
  end
  if fingerprint == whole_file_hash.hexdigest
    self.verified_at = Time.now
    self.save!
    return true
  end
  false
end