Module: BluxIndexer

Included in:
BlogManager, DraftManager
Defined in:
lib/indexer.rb

Overview

Copyright 2010 Louis-Philippe Salin de l’Etoile, aka Louis Salin email: [email protected]

This file is part of Blux.

Blux is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Blux is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Blux. If not, see <www.gnu.org/licenses/>.

Instance Method Summary collapse

Instance Method Details

#check_count ⇒ Object 



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# File 'lib/indexer.rb', line 72

def check_count
	if @index.keys.length > 0
		yield
	else
		msg = "there is currently no saved index"
		raise RuntimeError, msg
	end
end

#check_filename(filename) ⇒ Object 



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# File 'lib/indexer.rb', line 27

def check_filename(filename)
	draft_filename = "#{self.draft_dir}/#{filename}"

	if (File.exists?(draft_filename))
		yield draft_filename
	else
		msg = "draft filename #{filename} does not exist"
		raise RuntimeError, msg
	end
end

#check_index(filename) ⇒ Object 



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# File 'lib/indexer.rb', line 20

def check_index(filename)
	check_filename(filename) do
		@index[filename] ||= {}
		yield @index[filename]
	end
end

#check_title(filename, attr_key, attr_val) ⇒ Object 



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# File 'lib/indexer.rb', line 38

def check_title(filename, attr_key, attr_val)
	return true unless attr_key.to_s == "title"
	
	unique_title = true
	@index.keys.reject{|k| k == filename}.each do |key|
		unique_title = false if (@index[key][attr_key.to_s] == attr_val)
	end
	
	STDERR << "warning: title '#{attr_val}' is not unique\n" unless unique_title 
	true
end

#delete_attribute(filename, attr_name) ⇒ Object 



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# File 'lib/indexer.rb', line 59

def delete_attribute(filename, attr_name)
	check_index(filename) do |index|
		index.delete(attr_name.to_s)
		save_index
	end
end

#get_attribute(filename, attribute) ⇒ Object 



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# File 'lib/indexer.rb', line 66

def get_attribute(filename, attribute)
	check_index(filename) do |index|
		index[attribute]
	end
end

#load_index ⇒ Object 



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# File 'lib/indexer.rb', line 81

def load_index
	system "touch #{@index_file}" unless File.exists? @index_file

	str = ''
	File.open(@index_file, 'r') do |f| 
		f.each_line {|l| str += l}
	end
		
	@index = str.length > 0 ? JSON.parse(str) : {}
end

#print_index ⇒ Object 



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# File 'lib/indexer.rb', line 98

def print_index
	puts @index.to_json + "\n" if @verbose
end

#save_index ⇒ Object 



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# File 'lib/indexer.rb', line 92

def save_index
	File.open(@index_file, 'w') do |f| 
		f.write(@index.to_json) if @index
	end
end

#set_attribute(filename, key, val) ⇒ Object 



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# File 'lib/indexer.rb', line 50

def set_attribute(filename, key, val)
	check_index(filename) do |index|
		if check_title(filename, key, val)
			index[key.to_s] = val 
			save_index
		end
	end
end