127 lines
3.7 KiB
Ruby
127 lines
3.7 KiB
Ruby
##
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# This is a representation of a page of the wiki. My wiki is awfully simple
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# because i don't like too many features. This works and it has many different
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# associations. All of the major models has_one of these and it belongs_to
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# some kind of polymorphic owner.
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#
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# Bonuses:
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# * Uses RedCloth markup.
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# * Automatically converts/caches HTML
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# * Allows any alphanumeric character or space in the name
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# * Uses [[ and ]] for WikiWord representation.
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#
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class Page < ActiveRecord::Base
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acts_as_versioned
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acts_as_taggable
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belongs_to :owner, :polymorphic => true
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has_many :discussions, :order => 'discussions.created_at ASC',
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:dependent => :destroy
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belongs_to :created_by, :class_name => 'People', :foreign_key => 'created_by'
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belongs_to :updated_by, :class_name => 'People', :foreign_key => 'updated_by'
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validates_presence_of :title
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validates_uniqueness_of :title, :scope => 'owner_type'
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validates_format_of :title, :with => /^([A-Za-z0-9 ])+$/,
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:message => 'may only contain letters, numbers and spaces'
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before_save :update_html
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before_create :set_created_person
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before_save :set_updated_person
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attr_protected :allow_discussions, :created_by, :updated_by
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##
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# Returns an url-friendly title for making links.
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#
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def title_for_url
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self.title.gsub(/ /, '_')
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end
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##
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# Gets a title from an url name.
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#
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def self.title_from_url(title)
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title.to_s.gsub(/_/, ' ')
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end
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##
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# Returns a list of Tag models for a type of Page.
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#
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# Can take options of :order, :limit, and :owner_type
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#
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def self.tags(options = {})
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query = "select tags.id, name, count(*) as count"
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query << " from tags_pages, tags, pages"
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query << " where tags.id = tag_id"
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if options[:owner_type].nil?
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query << " and pages.owner_type IS NULL"
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else
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query << " and pages.owner_type = '#{options[:owner_type]}'"
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end
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query << " and tags_pages.page_id = pages.id"
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query << " group by tags.id, tags.name"
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query << " order by #{options[:order]}" if options[:order] != nil
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query << " limit #{options[:limit]}" if options[:limit] != nil
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tags = Tag.find_by_sql(query)
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end
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##
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# Determines if a Page exists.
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#
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def self.exists?(page_name, owner_type = nil)
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cond_ary = [
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'title = :page_name'
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]
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cond_var = {
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:page_name => page_name,
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:owner_type => owner_type
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}
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if owner_type.nil? or owner_type == 'Page'
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cond_ary << 'owner_type IS NULL'
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else
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cond_ary << 'owner_type = :owner_type'
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end
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self.count(:conditions => [ cond_ary.join(' AND '), cond_var ]) > 0
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end
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protected
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##
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# Sets the People marker for created_by on creation.
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#
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def set_created_person
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self[:created_by] = ApplicationController.current_people_id rescue nil
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self[:created_by] ||= People.penguincoder.id rescue nil
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end
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##
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# Sets the People marker for updated_by on save.
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#
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def set_updated_person
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self[:updated_by] = ApplicationController.current_people_id rescue nil
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self[:updated_by] ||= People.penguincoder.id rescue nil
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end
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##
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# Updates the HTML chunk from the RedCloth source.
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#
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def update_html
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# need to filter HTML first... remove <script> and chunks and the like...
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self.html = RedCloth.new(strip_tags(self.redcloth.to_s),
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[ :no_span_caps ]).to_html(
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# no link references. messes up lines starting with [[WikiWord]]
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:block_textile_table, :block_textile_lists, :block_textile_prefix,
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:inline_textile_image, :inline_textile_link, :inline_textile_code,
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:inline_textile_span, :glyphs_textile)
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end
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##
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# Removes HTML tags from a string
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#
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def strip_tags(str)
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str.gsub(/\</, "<").gsub(/\>/, ">").gsub(/\&/, "&")
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end
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end
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