Class: ParseSSI

Inherits:
Object
  • Object
show all
Defined in:
lib/parse_ssi.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(web_root) ⇒ ParseSSI

Returns a new instance of ParseSSI.



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# File 'lib/parse_ssi.rb', line 5

def initialize web_root
	@vars = {}
	@web_root = web_root
	return
end

Instance Attribute Details

#bottom ⇒ Object (readonly)

Returns the value of attribute bottom.



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# File 'lib/parse_ssi.rb', line 3

def bottom
  @bottom
end

#top ⇒ Object (readonly)

Returns the value of attribute top.



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# File 'lib/parse_ssi.rb', line 3

def top
  @top
end

#vars ⇒ Object (readonly)

Returns the value of attribute vars.



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# File 'lib/parse_ssi.rb', line 3

def vars
  @vars
end

#web_root ⇒ Object (readonly)

Returns the value of attribute web_root.



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# File 'lib/parse_ssi.rb', line 3

def web_root
  @web_root
end

Instance Method Details

#echo_tag(var) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 69

def echo_tag var
	[ '<!--#echo var="' + var + '" -->', "\n" ].join
end

#file_include_tag(path) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 65

def file_include_tag path
	[ '<!--#include virtual="' + @web_root + path.to_s + '" -->', "\n" ].join
end

#parse(file) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 11

def parse file

	# the parse routine currently understands only 3 SSI attributes
	#
	# <!--#echo var="FOO" -->
	#
	# <!--#include virtual="/path/to/file" -->
	#
	# <!--#set var="FOO" value="bar" -->
	#
	# more may be added if required.

	result = File.read( @web_root + "/" + file )

	1 while result.sub!(/<!--#(\w+)\s(.*?)\s*-->(\n+)?/) do |match|
		attrs = parse_attributes($2)
		case $1
		when 'echo'
			@vars[ attrs['var'] ]
		when 'include'
			attrs['virtual'].gsub!(/\$\{(\w+)\}/) do |m|
				if $1
					@vars[$1] 
				else
					m
				end
			end
			File.read( @web_root + "/" + attrs['virtual'] )
		when 'set'
			@vars[ attrs['var'] ] = attrs['value']
			''
		else
			match
		end
	end
	result
end

#parse_attributes(source) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 49

def parse_attributes(source)
	attrs = Hash.new 
	source.scan( /(\w+)="([^"]*)"/ ) do |match|
		attrs[$1] = $2
	end
	return attrs
end

#set_tag(var, value) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 57

def set_tag var, value
	[ '<!--#set var="' + var + '" value="', value.to_s, '" -->', "\n" ].join
end

#virtual_include_tag(path) ⇒ Object 



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# File 'lib/parse_ssi.rb', line 61

def virtual_include_tag path
	[ '<!--#include virtual="' + path.to_s + '" -->', "\n" ].join
end