Class: Import

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/import.rb

Direct Known Subclasses

IssueImport

Constant Summary

DATE_FORMATS = 
[
  '%Y-%m-%d',
  '%d/%m/%Y',
  '%m/%d/%Y',
  '%d.%m.%Y',
  '%d-%m-%Y'
]

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Import

Returns a new instance of Import



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# File 'app/models/import.rb', line 38

def initialize(*args)
  super
  self.settings ||= {}
end

Instance Method Details

#columns_options(default = nil) ⇒ Object

Returns the headers as an array that can be used for select options



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# File 'app/models/import.rb', line 94

def columns_options(default=nil)
  i = -1
  headers.map {|h| [h, i+=1]}
end

#file=(arg) ⇒ Object 



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# File 'app/models/import.rb', line 43

def file=(arg)
  return unless arg.present? && arg.size > 0

  self.filename = generate_filename
  Redmine::Utils.save_upload(arg, filepath)
end

#file_exists? ⇒ Boolean

Returns true if the file to import exists

Returns:

  • (Boolean) 


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# File 'app/models/import.rb', line 88

def file_exists?
  filepath.present? && File.exists?(filepath)
end

#filepath ⇒ Object

Returns the full path of the file to import It is stored in tmp/imports with a random hex as filename



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# File 'app/models/import.rb', line 79

def filepath
  if filename.present? && filename =~ /\A[0-9a-f]+\z/
    File.join(Rails.root, "tmp", "imports", filename)
  else
    nil
  end
end

#first_rows(count = 4) ⇒ Object

Returns the count first rows of the file (including headers)



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# File 'app/models/import.rb', line 122

def first_rows(count=4)
  rows = []
  read_rows do |row|
    rows << row
    break if rows.size >= count
  end
  rows
end

#headers ⇒ Object

Returns an array of headers



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# File 'app/models/import.rb', line 132

def headers
  first_rows(1).first || []
end

#mapping ⇒ Object

Returns the mapping options



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# File 'app/models/import.rb', line 137

def mapping
  settings['mapping'] || {}
end

#parse_file ⇒ Object

Parses the file to import and updates the total number of items



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# File 'app/models/import.rb', line 100

def parse_file
  count = 0
  read_items {|row, i| count=i}
  update_attribute :total_items, count
  count
end

#read_items ⇒ Object

Reads the items to import and yields the given block for each item



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# File 'app/models/import.rb', line 108

def read_items
  i = 0
  headers = true
  read_rows do |row|
    if i == 0 && headers
      headers = false
      next
    end
    i+= 1
    yield row, i if block_given?
  end
end

#run(options = {}) ⇒ Object

Imports items and returns the position of the last processed item



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# File 'app/models/import.rb', line 142

def run(options={})
  max_items = options[:max_items]
  max_time = options[:max_time]
  current = 0
  imported = 0
  resume_after = items.maximum(:position) || 0
  interrupted = false
  started_on = Time.now

  read_items do |row, position|
    if (max_items && imported >= max_items) || (max_time && Time.now >= started_on + max_time)
      interrupted = true
      break
    end
    if position > resume_after
      item = items.build
      item.position = position

      if object = build_object(row)
        if object.save
          item.obj_id = object.id
        else
          item.message = object.errors.full_messages.join("\n")
        end
      end

      item.save!
      imported += 1
    end
    current = position
  end

  if imported == 0 || interrupted == false
    if total_items.nil?
      update_attribute :total_items, current
    end
    update_attribute :finished, true
    remove_file
  end

  current
end

#saved_items ⇒ Object 



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# File 'app/models/import.rb', line 189

def saved_items
  items.where("obj_id IS NOT NULL")
end

#set_default_settings ⇒ Object 



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# File 'app/models/import.rb', line 50

def set_default_settings
  separator = lu(user, :general_csv_separator)
  if file_exists?
    begin
      content = File.read(filepath, 256)
      separator = [',', ';'].sort_by {|sep| content.count(sep) }.last
    rescue Exception => e
    end
  end
  wrapper = '"'
  encoding = lu(user, :general_csv_encoding)

  date_format = lu(user, "date.formats.default", :default => "foo")
  date_format = DATE_FORMATS.first unless DATE_FORMATS.include?(date_format)

  self.settings.merge!(
    'separator' => separator,
    'wrapper' => wrapper,
    'encoding' => encoding,
    'date_format' => date_format
  )
end

#to_param ⇒ Object 



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# File 'app/models/import.rb', line 73

def to_param
  filename
end

#unsaved_items ⇒ Object 



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# File 'app/models/import.rb', line 185

def unsaved_items
  items.where(:obj_id => nil)
end