Class: JSONdb::FileOps

Inherits:
Object
  • Object
show all
Includes:
Logger
Defined in:
lib/jsondb/file_ops.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logger

#allowed_log_level?, #log, #log_enabled?, #log_this?

Constructor Details

#initialize(folder, filename, filetype, json = true) ⇒ FileOps

Returns a new instance of FileOps.



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# File 'lib/jsondb/file_ops.rb', line 11

def initialize(folder, filename, filetype, json = true)
  @folder = folder
  @filename = File.expand_path(File.join(@folder, filename))
  @filetype = filetype
  @contents = ""
  @json = json
end

Instance Attribute Details

#contents ⇒ Object

Returns the value of attribute contents.



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# File 'lib/jsondb/file_ops.rb', line 9

def contents
  @contents
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/jsondb/file_ops.rb', line 7

def filename
  @filename
end

#filetype ⇒ Object (readonly)

Returns the value of attribute filetype.



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# File 'lib/jsondb/file_ops.rb', line 7

def filetype
  @filetype
end

#folder ⇒ Object (readonly)

Returns the value of attribute folder.



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# File 'lib/jsondb/file_ops.rb', line 7

def folder
  @folder
end

#new_file ⇒ Object (readonly)

Returns the value of attribute new_file.



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# File 'lib/jsondb/file_ops.rb', line 7

def new_file
  @new_file
end

#writeable ⇒ Object (readonly)

Returns the value of attribute writeable.



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# File 'lib/jsondb/file_ops.rb', line 7

def writeable
  @writeable
end

Instance Method Details

#destroy ⇒ Object 



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# File 'lib/jsondb/file_ops.rb', line 73

def destroy
  if File.exists?(@filename)
    File.delete(@filename) 
    log("File '#{@filename}' deleted.", :info)
  else
    log("File '#{@filename}' does not exists.", :error)
  end
end

#read ⇒ Object 



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# File 'lib/jsondb/file_ops.rb', line 19

def read
  begin
    if File.exists?(@filename)
      file = File.open(@filename, 'r') 
      raw = file.read
      @new_file = false
      log("File '#{@filename}' readed.", :debug)
    else
      raw = JSONdb.constants.default_file_content[@filetype]
      @new_file = true
    end
    if @json == true
      @contents = JSON.parse(raw)
    else
      @contents = raw
    end
    file.close if file
    log("File '#{@filename}' parsed.", :debug)
    return true
  rescue
    log("File '#{@filename}' could not read the file.", :error)
    return false
  end
end

#write ⇒ Object 



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# File 'lib/jsondb/file_ops.rb', line 44

def write
  begin
    file = File.open(@filename, 'w')
    if @json == true
      file.write(JSON.pretty_generate(@contents))
    else 
      file.write(@contents)
    end
    file.close
    @new_file = false
    log("File '#{@filename}' content updated.", :debug)
    return true
  rescue
    log("File '#{@filename}' could not open and write the file.", :error)
    return false
  end
end

#write_line(line) ⇒ Object 



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# File 'lib/jsondb/file_ops.rb', line 62

def write_line(line)
  begin
    file = File.open(@filename, 'a+')
    file.write("#{line}\n")
    file.close
    @new_file = false
  rescue
    log("Couldn't write line on file '#{@filename}'.", :error)
  end
end