instiki/lib/url_generator.rb

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require 'stringsupport'
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class AbstractUrlGenerator
def initialize(controller)
raise 'Controller cannot be nil' if controller.nil?
@controller = controller
end
# Create a link for the given page (or file) name and link text based
# on the render mode in options and whether the page (file) exists
# in the web.
def make_link(asked_name, web, text = nil, options = {})
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mode = (options[:mode] || :show).to_sym
link_type = (options[:link_type] || :show).to_sym
if (link_type == :show)
page_exists = web.has_page?(asked_name)
known_page = page_exists || web.has_redirect_for?(asked_name)
if known_page && !page_exists
name = web.page_that_redirects_for(asked_name)
else
name = asked_name
end
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else
name = asked_name
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known_page = web.has_file?(name)
description = web.description(name)
description = description.unescapeHTML.escapeHTML if description
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end
if (text == asked_name)
text = description || text
else
text = text || description
end
text = (text || WikiWords.separate(asked_name)).unescapeHTML.escapeHTML
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case link_type
when :show
page_link(mode, name, text, web.address, known_page)
when :file
file_link(mode, name, text, web.address, known_page, description)
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when :pic
pic_link(mode, name, text, web.address, known_page)
when :audio
media_link(mode, name, text, web.address, known_page, 'audio')
when :video
media_link(mode, name, text, web.address, known_page, 'video')
when :delete
delete_link(mode, name, web.address, known_page)
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else
raise "Unknown link type: #{link_type}"
end
end
end
class UrlGenerator < AbstractUrlGenerator
private
def file_link(mode, name, text, web_address, known_file, description)
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case mode
when :export
if known_file
%{<a class="existingWikiWord" title="#{description}" href="#{CGI.escape(name)}.#{@controller.html_ext}">#{text}</a>}
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else
%{<span class="newWikiWord">#{text}</span>}
end
when :publish
if known_file
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
%{<a class="existingWikiWord" title="#{description}" href="#{href}">#{text}</a>}
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else
%{<span class="newWikiWord">#{text}</span>}
end
else
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
if known_file
%{<a class="existingWikiWord" title="#{description}" href="#{href}">#{text}</a>}
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else
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
end
end
def page_link(mode, name, text, web_address, known_page)
case mode
when :export
if known_page
%{<a class="existingWikiWord" href="#{CGI.escape(name)}.#{@controller.html_ext}">#{text}</a>}
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else
%{<span class="newWikiWord">#{text}</span>}
end
when :publish
if known_page
href = @controller.url_for :controller => 'wiki', :web => web_address, :action => 'published',
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:id => name
%{<a class="existingWikiWord" href="#{href}">#{text}</a>}
else
%{<span class="newWikiWord">#{text}</span>}
end
when :show
if known_page
href = @controller.url_for :controller => 'wiki', :web => web_address, :action => 'show',
:id => name
%{<a class="existingWikiWord" href="#{href}">#{text}</a>}
else
href = @controller.url_for :controller => 'wiki', :web => web_address, :action => 'new',
:id => name
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
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else
if known_page
web = Web.find_by_address(web_address)
action = web.published? ? 'published' : 'show'
href = @controller.url_for :controller => 'wiki', :web => web_address, :action => action,
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:id => name
%{<a class="existingWikiWord" href="#{href}">#{text}</a>}
else
href = @controller.url_for :controller => 'wiki', :web => web_address, :action => 'new',
:id => name
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
end
end
def pic_link(mode, name, text, web_address, known_pic)
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
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case mode
when :export
if known_pic
%{<img alt="#{text}" src="#{CGI.escape(name)}" />}
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else
%{<img alt="#{text}" src="no image" />}
end
when :publish
if known_pic
%{<img alt="#{text}" src="#{href}" />}
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else
%{<span class="newWikiWord">#{text}</span>}
end
else
if known_pic
%{<img alt="#{text}" src="#{href}" />}
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else
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
end
end
def media_link(mode, name, text, web_address, known_media, media_type)
href = @controller.url_for :controller => 'file', :web => web_address, :action => 'file',
:id => name
case mode
when :export
if known_media
%{<#{media_type} src="#{CGI.escape(name)}" controls="controls">#{text}</#{media_type}>}
else
text
end
when :publish
if known_media
%{<#{media_type} src="#{href}" controls="controls">#{text}</#{media_type}>}
else
%{<span class="newWikiWord">#{text}</span>}
end
else
if known_media
%{<#{media_type} src="#{href}" controls="controls">#{text}</#{media_type}>}
else
%{<span class="newWikiWord">#{text}<a href="#{href}">?</a></span>}
end
end
end
def delete_link(mode, name, web_address, known_file)
href = @controller.url_for :controller => 'file', :web => web_address,
:action => 'delete', :id => name
if mode == :show and known_file
%{<span class="deleteWikiWord"><a href="#{href}">Delete #{name}</a></span>}
else
%{<span class="deleteWikiWord">[[#{name}:delete]]</span>}
end
end
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end