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-rw-r--r--lib/feed2imap/channel.rb334
1 files changed, 0 insertions, 334 deletions
diff --git a/lib/feed2imap/channel.rb b/lib/feed2imap/channel.rb
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index c43c254..0000000
--- a/lib/feed2imap/channel.rb
+++ /dev/null
@@ -1,334 +0,0 @@
-=begin
-Feed2Imap - RSS/Atom Aggregator uploading to an IMAP Server
-Copyright (c) 2005 Lucas Nussbaum <lucas@lucas-nussbaum.net>
-
-This program 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 2 of the License, or
-(at your option) any later version.
-
-This program 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 this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-=end
-
-# This class allows to retrieve a feed and parse it into a Channel
-
-require 'rexml/document'
-require 'time'
-require 'rmail'
-require 'feed2imap/textconverters'
-require 'feed2imap/rubymail_patch'
-require 'feed2imap/rexml_patch'
-require 'base64'
-
-class UnknownFeedTypeException < RuntimeError
-end
-# an RSS/Atom channel
-class Channel
- attr_reader :title, :link, :description, :creator, :encoding, :items
-
- # parse str to build a channel
- def initialize(str = nil)
- parse_str(str) if str
- end
-
- # Determines all the fields using a string containing an
- # XML document
- def parse_str(str)
- # Dirty hack: some feeds contain the & char. It must be changed to &amp;
- str.gsub!(/&(\s+)/, '&amp;\1')
- doc = REXML::Document.new(str)
- # get channel info
- @encoding = doc.encoding
- @title,@link,@description,@creator = nil
- @items = []
- if doc.root.elements['channel'] || doc.root.elements['rss:channel']
- # We have a RSS feed!
- # Title
- if (e = doc.root.elements['channel/title'] ||
- doc.root.elements['rss:channel/rss:title']) && e.text
- @title = e.text.toUTF8(@encoding).rmWhiteSpace!
- end
- # Link
- if (e = doc.root.elements['channel/link'] ||
- doc.root.elements['rss:channel/rss:link']) && e.text
- @link = e.text.rmWhiteSpace!
- end
- # Description
- if (e = doc.root.elements['channel/description'] ||
- doc.root.elements['rss:channel/rss:description']) && e.text
- @description = e.text.toUTF8(@encoding).rmWhiteSpace!
- end
- # Creator
- if ((e = doc.root.elements['channel/dc:creator']) && e.text) ||
- ((e = doc.root.elements['channel/author'] ||
- doc.root.elements['rss:channel/rss:author']) && e.text)
- @creator = e.text.toUTF8(@encoding).rmWhiteSpace!
- end
- # Items
- if doc.root.elements['channel/item']
- query = 'channel/item'
- elsif doc.root.elements['item']
- query = 'item'
- elsif doc.root.elements['rss:channel/rss:item']
- query = 'rss:channel/rss:item'
- else
- query = 'rss:item'
- end
- doc.root.each_element(query) { |e| @items << Item::new(e, self) }
-
- elsif doc.root.elements['/feed']
- # We have an ATOM feed!
- # Title
- if (e = doc.root.elements['/feed/title']) && e.text
- @title = e.text.toUTF8(@encoding).rmWhiteSpace!
- end
- # Link
- doc.root.each_element('/feed/link') do |e|
- if e.attribute('type') and (
- e.attribute('type').value == 'text/html' or
- e.attribute('type').value == 'application/xhtml' or
- e.attribute('type').value == 'application/xhtml+xml')
- if (h = e.attribute('href')) && h
- @link = h.value.rmWhiteSpace!
- end
- end
- end
- # Description
- if e = doc.root.elements['/feed/info']
- @description = e.elements.to_s.toUTF8(@encoding).rmWhiteSpace!
- end
- # Items
- doc.root.each_element('/feed/entry') do |e|
- @items << AtomItem::new(e, self)
- end
- else
- raise UnknownFeedTypeException::new
- end
- end
-
- def to_s
- s = "Title: #{@title}\nLink: #{@link}\n\n"
- @items.each { |i| s += i.to_s }
- s
- end
-end
-
-# an Item from a channel
-class Item
- attr_accessor :title, :link, :content, :date, :creator, :subject,
- :category, :cacheditem
- attr_reader :channel
- def initialize(item = nil, channel = nil)
- @channel = channel
- @title, @link, @content, @date, @creator, @subject, @category = nil
- if item
- # Title
- if ((e = item.elements['title'] || item.elements['rss:title']) &&
- e.text) ||
- ((e = item.elements['pubDate'] || item.elements['rss:pubDate']) &&
- e.text)
- @title = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- # Link
- if ((e = item.elements['link'] || item.elements['rss:link']) && e.text)||
- (e = item.elements['guid'] || item.elements['rss:guid'] and
- not (e.attribute('isPermaLink') and
- e.attribute('isPermaLink').value == 'false'))
- @link = e.text.rmWhiteSpace!
- end
- # Content
- if (e = item.elements['content:encoded']) ||
- (e = item.elements['description'] || item.elements['rss:description'])
- if e.children.length > 1
- s = ''
- e.children.each { |c| s += c.to_s }
- @content = s.toUTF8(@channel.encoding).rmWhiteSpace!.text2html
- elsif e.children.length == 1
- if e.cdatas[0]
- @content = e.cdatas[0].to_s.toUTF8(@channel.encoding).rmWhiteSpace!
- elsif e.text
- @content = e.text.toUTF8(@channel.encoding).text2html
- end
- end
- end
- # Date
- if e = item.elements['dc:date'] || item.elements['pubDate'] ||
- item.elements['rss:pubDate']
- begin
- @date = Time::xmlschema(e.text)
- rescue
- begin
- @date = Time::rfc2822(e.text)
- rescue
- begin
- @date = Time::parse(e.text)
- rescue
- @date = nil
- end
- end
- end
- end
- # Creator
- @creator = @channel.creator
- if (e = item.elements['dc:creator'] || item.elements['author'] ||
- item.elements['rss:author']) && e.text
- @creator = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- # Subject
- if (e = item.elements['dc:subject']) && e.text
- @subject = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- # Category
- if (e = item.elements['dc:category'] || item.elements['category'] ||
- item.elements['rss:category']) && e.text
- @category = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- end
- end
-
- def to_s
- "--------------------------------\n" +
- "Title: #{@title}\nLink: #{@link}\n" +
- "Date: #{@date.to_s}\nCreator: #{@creator}\n" +
- "Subject: #{@subject}\nCategory: #{@category}\nContent:\n#{content}\n"
- end
-
- def to_text
- s = ""
- s += "Channel: "
- s += @channel.title.toISO_8859_1('utf-8') + ' ' if @channel.title
- s += "<#{@channel.link.toISO_8859_1('utf-8')}>" if @channel.link
- s += "\n"
- s += "Item: "
- s += @title.toISO_8859_1('utf-8') + ' ' if @title
- s += "<#{@link.toISO_8859_1('utf-8')}>" if @link
- s += "\n"
- s += "\nDate: #{@date.to_s.toISO_8859_1('utf-8')}" if @date # TODO improve date rendering ?
- s += "\nAuthor: #{@creator.toISO_8859_1('utf-8')}" if @creator
-
- s += "\nSubject: #{@subject.toISO_8859_1('utf-8')}" if @subject
- s += "\nCategory: #{@category.toISO_8859_1('utf-8')}" if @category
- s += "\n\n"
- s += "#{@content.html2text.toISO_8859_1('utf-8')}" if @content
- s
- end
-
- def to_html
- s = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">'
- s += '<html>'
- s += '<body>'
- s += "<p>Channel: "
- s += "<a href=\"#{@channel.link}\">" if @channel.link
- s += @channel.title if @channel.title
- s += "</a>" if @channel.link
- s += "<br/>\nItem: "
- s += "<a href=\"#{@link}\">" if @link
- s += @title if @title
- s += "</a>" if @link
- s += "\n"
- s += "<br/>Date: #{@date.to_s}" if @date # TODO improve date rendering ?
- s += "<br/>Author: #{@creator}" if @creator
- s += "<br/>Subject: #{@subject}" if @subject
- s += "<br/>Category: #{@category}" if @category
- s += "</p>"
- s += "<p>#{@content}</p>" if @content
- s += '</body></html>'
- s
- end
-
- def to_mail(from = 'Feed2Imap')
- message = RMail::Message::new
- message.header['From'] = "#{from} <feed2imap@feed2imap.net>"
- message.header['To'] = "#{from} <feed2imap@feed2imap.net>"
- if @date.nil?
- message.header['Date'] = Time::new.rfc2822
- else
- message.header['Date'] = @date.rfc2822
- end
- message.header['X-Feed2Imap-Version'] = F2I_VERSION if defined?(F2I_VERSION)
- message.header['X-CacheIndex'] = "-#{@cacheditem.index}-"
- message.header['X-F2IStatus'] = "Updated" if @cacheditem.updated
- # treat subject. Might need MIME encoding.
- subj = @title or (@date and @date.to_s) or @link
- if subj
- if subj.needMIME
- message.header['Subject'] = "=?utf-8?b?#{Base64::encode64(subj).gsub("\n",'')}?="
- else
- message.header['Subject'] = subj
- end
- end
- textpart = RMail::Message::new
- textpart.header['Content-Type'] = 'text/plain; charset=iso-8859-1'
- textpart.header['Content-Transfer-Encoding'] = '7bit'
- textpart.body = to_text
- htmlpart = RMail::Message::new
- htmlpart.header['Content-Type'] = 'text/html; charset=utf-8'
- htmlpart.header['Content-Transfer-Encoding'] = '7bit'
- htmlpart.body = to_html
- message.add_part(textpart)
- message.add_part(htmlpart)
- return message.to_s
- end
-end
-
-class AtomItem < Item
- def initialize(item = nil, channel = nil)
- @channel = channel
- @title, @link, @content, @date, @creator, @subject, @category = nil
- if item
- # Title
- if (e = item.elements['title']) && e.text
- @title = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- # Link
- item.each_element('link') do |e|
- if e.attribute('type').value == 'text/html' or
- e.attribute('type').value == 'application/xhtml' or
- e.attribute('type').value == 'application/xhtml+xml'
- if (h = e.attribute('href')) && h.value
- @link = h.value
- end
- end
- end
- # Content
- if e = item.elements['content'] || item.elements['summary']
- if (e.attribute('mode') and e.attribute('mode').value == 'escaped') &&
- e.text
- @content = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- else
- # go one step deeper in the recursion if possible
- e = e.elements['div'] || e
- @content = e.to_s.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- end
- # Date
- if (e = item.elements['issued'] || e = item.elements['created']) && e.text
- begin
- @date = Time::xmlschema(e.text)
- rescue
- begin
- @date = Time::rfc2822(e.text)
- rescue
- begin
- @date = Time::parse(e.text)
- rescue
- @date = nil
- end
- end
- end
- end
- # Creator
- @creator = @channel.creator
- if (e = item.elements['author/name']) && e.text
- @creator = e.text.toUTF8(@channel.encoding).rmWhiteSpace!
- end
- end
- end
-end
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