Class: Kurosawa::Database

Inherits:
Sinatra::Base
  • Object
show all
Defined in:
lib/kurosawa/database.rb

Instance Method Summary collapse

Instance Method Details

#delete(fs, path) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 152

def delete(fs, path)
	inner_entries = fs.ls("#{path}")

	puts "delete: #{inner_entries.inspect}"

	inner_entries.each do |x|
		fs.del(x)
	end
end

#get_property(fs, path) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 43

def get_property(fs, path)
	property_entries = fs.ls("#{path}/$")
	if property_entries.length == 0
		nil
	elsif property_entries.length == 1
		JSON.parse(fs.get(property_entries[0]), symbolize_names: true)
	else
		# conflict
		raise "TODO get_property handle conflict"
	end
end

#random_key ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 39

def random_key
	SecureRandom.hex(4)
end

#read(fs, path, params) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 68

def read(fs, path, params)

	puts "read: path=#{path.inspect}"
	prop = get_property(fs, path)
	if prop == nil
		nil
	elsif prop[:type] == "object"
		res = {}

		inner_entries = fs.ls("#{path}")
			.select{ |x| /^\/\$/.match(x) == nil }
			.map{ |x| x.sub(/\/[^\/]+$/, "") }
			.map{ |x| match = /(?<first>^\/[^\/]+)/.match(x.sub(/^#{path}/, "")); match[:first] if match }
			.select{ |x| x != nil}
			.uniq

		puts "read: object: inner: #{fs.ls("#{path}").inspect}"
		puts "read: object: inner: #{inner_entries.inspect}"

		inner_entries.each do |x|
			res[x[1..-1]] = read(fs, path + x, params)
		end

		res

	elsif prop[:type] == "array"
		inner_entries = fs.ls("#{path}")
			.select{ |x| /\/\$/.match(x) == nil }
			.map{ |x| match = /(?<first>^\/[^\/]+)/.match(x.sub(/^#{path}/, "")); match[:first] if match }
			.select{ |x| x != nil}
			.uniq

		puts "read: array: #{inner_entries.inspect}"

		inner_entries.map do |x|
			read(fs, path + x, params)
		end

	else
		inner_entries = fs.ls("#{path}")
			.select{ |x| /\/\$/.match(x) == nil }

		puts "read: string: #{inner_entries.inspect}"

		if inner_entries.length == 1
			JSON.parse(fs.get(inner_entries[0]), symbolize_names: true)[:value] 
		elsif inner_entries.length == 0
			nil
		else
			{"$conflict": inner_entries.map{|x| JSON.parse(fs.get(x), symbolize_names: true) }}
			#raise "read conflict at #{path} #{inner_entries.inspect}"
		end
	end
end

#sanitize_body(body) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 30

def sanitize_body(body)
	begin
		JSON.parse(body)
	rescue => e
		puts e
		halt 400
	end
end

#sanitize_path(path) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 20

def sanitize_path(path)
	match = /^\/[a-z0-9\-_\/]*$/i.match(URI.unescape(path))
	if match
		match.to_s.sub(/\/+$/, "")
	else
		p URI.unescape(path)
		halt 400
	end
end

#set_property(fs, path, type:) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 55

def set_property(fs, path, type:)
	puts "set property: #{path}"
	property_entries = fs.ls("#{path}/$")
	p property_entries
	if property_entries.length > 0
		property_entries.each do |x|
			fs.del(x)
		end
	end
	fs.put("#{path}/$#{random_key}", {type: type}.to_json)
end

#write(fs, path, body) ⇒ Object 



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# File 'lib/kurosawa/database.rb', line 123

def write(fs, path, body)

	puts "write: path=#{path.inspect}"

	if body.is_a? Hash
		set_property(fs, path, type: "object")
		body.each do |k,v|
			write(fs, "#{path}/#{k}", v)
		end

	elsif body.is_a? Array
		set_property(fs, path, type: "array")
		body.each do |value|
			write(fs, "#{path}/#{random_key}", value)
		end

	else
		existing_entries = fs.ls("#{path}")

		if existing_entries.length > 0
			existing_entries.each do |x|
				fs.del(x)
			end
		end
		set_property(fs, path, type: "string")
		fs.put("#{path}/#{random_key}", {value: body.to_s}.to_json)
	end
end