Added import to EPUB function.

11 files changed, 598 insertions, 1 deletions

diff --git a/epub/__init__.py b/epub/__init__.py
new file mode 100644
index 00000000..8d1c8b69
--- /dev/null
+++ b/epub/__init__.py
@@ -0,0 +1 @@
+ 
diff --git a/epub/epub.py b/epub/epub.py
new file mode 100644
index 00000000..834acee6
--- /dev/null
+++ b/epub/epub.py
@@ -0,0 +1,354 @@
+#! /usr/local/bin/python

+#-*- coding: utf-8 -*-

+

+import itertools

+import mimetypes

+import os

+import shutil

+import subprocess

+import uuid

+import zipfile

+from genshi.template import TemplateLoader

+from lxml import etree

+

+class TocMapNode:

+

+    def __init__(self):

+        self.playOrder = 0

+        self.title = ''

+        self.href = ''

+        self.children = []

+        self.depth = 0

+

+    def assignPlayOrder(self):

+        nextPlayOrder = [0]

+        self.__assignPlayOrder(nextPlayOrder)

+

+    def __assignPlayOrder(self, nextPlayOrder):

+        self.playOrder = nextPlayOrder[0]

+        nextPlayOrder[0] = self.playOrder + 1

+        for child in self.children:

+            child.__assignPlayOrder(nextPlayOrder)

+

+

+class EpubItem:

+

+    def __init__(self):

+        self.id = ''

+        self.srcPath = ''

+        self.destPath = ''

+        self.mimeType = ''

+        self.html = ''

+

+

+class EpubBook:

+

+    def __init__(self):

+        self.loader = TemplateLoader('./epub/templates')

+

+        self.rootDir = ''

+        self.UUID = uuid.uuid1()

+

+        self.lang = 'en-US'

+        self.title = ''

+        self.creators = []

+        self.metaInfo = []

+

+        self.imageItems = {}

+        self.htmlItems = {}

+        self.cssItems = {}

+

+        self.coverImage = None

+        self.titlePage = None

+        self.tocPage = None

+

+        self.spine = []

+        self.guide = {}

+        self.tocMapRoot = TocMapNode()

+        self.lastNodeAtDepth = {0 : self.tocMapRoot}

+

+    def setTitle(self, title):

+        self.title = title

+

+    def setLang(self, lang):

+        self.lang = lang

+

+    def addCreator(self, name, role = 'aut'):

+        self.creators.append((name, role))

+

+    def addMeta(self, metaName, metaValue, **metaAttrs):

+        self.metaInfo.append((metaName, metaValue, metaAttrs))

+

+    def getMetaTags(self):

+        l = []

+        for metaName, metaValue, metaAttr in self.metaInfo:

+            beginTag = '<dc:%s' % metaName

+            if metaAttr:

+                for attrName, attrValue in metaAttr.iteritems():

+                    beginTag += ' opf:%s="%s"' % (attrName, attrValue)

+            beginTag += '>'

+            endTag = '</dc:%s>' % metaName

+            l.append((beginTag, metaValue, endTag))

+        return l

+

+    def getImageItems(self):

+        return sorted(self.imageItems.values(), key = lambda x : x.id)

+

+    def getHtmlItems(self):

+        return sorted(self.htmlItems.values(), key = lambda x : x.id)

+

+    def getCssItems(self):

+        return sorted(self.cssItems.values(), key = lambda x : x.id)

+

+    def getAllItems(self):

+        return sorted(itertools.chain(self.imageItems.values(), self.htmlItems.values(), self.cssItems.values()), key = lambda x : x.id)

+

+    def addImage(self, srcPath, destPath):

+        item = EpubItem()

+        item.id = 'image_%d' % (len(self.imageItems) + 1)

+        item.srcPath = srcPath

+        item.destPath = destPath

+        item.mimeType = mimetypes.guess_type(destPath)[0]

+        assert item.destPath not in self.imageItems

+        self.imageItems[destPath] = item

+        return item

+

+    def addHtmlForImage(self, imageItem):

+        tmpl = self.loader.load('image.html')

+        stream = tmpl.generate(book = self, item = imageItem)

+        html = stream.render('xhtml', doctype = 'xhtml11', drop_xml_decl = False)

+        return self.addHtml('', '%s.html' % imageItem.destPath, html)

+

+    def addHtml(self, srcPath, destPath, html):

+        item = EpubItem()

+        item.id = 'html_%d' % (len(self.htmlItems) + 1)

+        item.srcPath = srcPath

+        item.destPath = destPath

+        item.html = html

+        item.mimeType = 'application/xhtml+xml'

+        assert item.destPath not in self.htmlItems

+        self.htmlItems[item.destPath] = item

+        return item

+

+    def addCss(self, srcPath, destPath):

+        item = EpubItem()

+        item.id = 'css_%d' % (len(self.cssItems) + 1)

+        item.srcPath = srcPath

+        item.destPath = destPath

+        item.mimeType = 'text/css'

+        assert item.destPath not in self.cssItems

+        self.cssItems[item.destPath] = item

+        return item

+

+    def addCover(self, srcPath):

+        assert not self.coverImage

+        _, ext = os.path.splitext(srcPath)

+        destPath = 'cover%s' % ext

+        self.coverImage = self.addImage(srcPath, destPath)

+        #coverPage = self.addHtmlForImage(self.coverImage)

+        #self.addSpineItem(coverPage, False, -300)

+        #self.addGuideItem(coverPage.destPath, 'Cover', 'cover')

+

+    def __makeTitlePage(self):

+        assert self.titlePage

+        if self.titlePage.html:

+            return

+        tmpl = self.loader.load('title-page.html')

+        stream = tmpl.generate(book = self)

+        self.titlePage.html = stream.render('xhtml', doctype = 'xhtml11', drop_xml_decl = False)

+

+    def addTitlePage(self, html = ''):

+        assert not self.titlePage

+        self.titlePage = self.addHtml('', 'title-page.html', html)

+        self.addSpineItem(self.titlePage, True, -200)

+        self.addGuideItem('title-page.html', 'Title Page', 'title-page')

+

+    def __makeTocPage(self):

+        assert self.tocPage

+        tmpl = self.loader.load('toc.html')

+        stream = tmpl.generate(book = self)

+        self.tocPage.html = stream.render('xhtml', doctype = 'xhtml11', drop_xml_decl = False)

+

+    def addTocPage(self):

+        assert not self.tocPage

+        self.tocPage = self.addHtml('', 'toc.html', '')

+        self.addSpineItem(self.tocPage, False, -100)

+        self.addGuideItem('toc.html', 'Table of Contents', 'toc')

+

+    def getSpine(self):

+        return sorted(self.spine)

+

+    def addSpineItem(self, item, linear = True, order = None):

+        assert item.destPath in self.htmlItems

+        if order == None:

+            order = (max(order for order, _, _ in self.spine) if self.spine else 0) + 1

+        self.spine.append((order, item, linear))

+

+    def getGuide(self):

+        return sorted(self.guide.values(), key = lambda x : x[2])

+

+    def addGuideItem(self, href, title, type):

+        assert type not in self.guide

+        self.guide[type] = (href, title, type)

+

+    def getTocMapRoot(self):

+        return self.tocMapRoot

+

+    def getTocMapHeight(self):

+        return max(self.lastNodeAtDepth.keys())

+

+    def addTocMapNode(self, href, title, depth = None, parent = None):

+        node = TocMapNode()

+        node.href = href

+        node.title = title

+        if parent == None:

+            if depth == None:

+                parent = self.tocMapRoot

+            else:

+                parent = self.lastNodeAtDepth[depth - 1]

+        parent.children.append(node)

+        node.depth = parent.depth + 1

+        self.lastNodeAtDepth[node.depth] = node

+        return node

+

+    def makeDirs(self):

+        try:

+            os.makedirs(os.path.join(self.rootDir, 'META-INF'))

+        except OSError:

+            pass

+        try:

+            os.makedirs(os.path.join(self.rootDir, 'OEBPS'))

+        except OSError:

+            pass

+

+    def __writeContainerXML(self):

+        fout = open(os.path.join(self.rootDir, 'META-INF', 'container.xml'), 'w')

+        tmpl = self.loader.load('container.xml')

+        stream = tmpl.generate()

+        fout.write(stream.render('xml'))

+        fout.close()

+

+    def __writeTocNCX(self):

+        self.tocMapRoot.assignPlayOrder()

+        fout = open(os.path.join(self.rootDir, 'OEBPS', 'toc.ncx'), 'w')

+        tmpl = self.loader.load('toc.ncx')

+        stream = tmpl.generate(book = self)

+        fout.write(stream.render('xml'))

+        fout.close()

+

+    def __writeContentOPF(self):

+        fout = open(os.path.join(self.rootDir, 'OEBPS', 'content.opf'), 'w')

+        tmpl = self.loader.load('content.opf')

+        stream = tmpl.generate(book = self)

+        fout.write(stream.render('xml'))

+        fout.close()

+

+    def __writeItems(self):

+        for item in self.getAllItems():

+            print item.id, item.destPath

+            if item.html:

+                fout = open(os.path.join(self.rootDir, 'OEBPS', item.destPath), 'w')

+                fout.write(item.html)

+                fout.close()

+            else:

+                shutil.copyfile(item.srcPath, os.path.join(self.rootDir, 'OEBPS', item.destPath))

+

+

+    def __writeMimeType(self):

+        fout = open(os.path.join(self.rootDir, 'mimetype'), 'w')

+        fout.write('application/epub+zip')

+        fout.close()

+

+    @staticmethod

+    def __listManifestItems(contentOPFPath):

+        tree = etree.parse(contentOPFPath)

+        return tree.xpath("//opf:manifest/opf:item/@href", namespaces = {'opf': 'http://www.idpf.org/2007/opf'})

+

+    @staticmethod

+    def createArchive(rootDir, outputPath):

+        fout = zipfile.ZipFile(outputPath, 'w')

+        cwd = os.getcwd()

+        os.chdir(rootDir)

+        fout.write('mimetype', compress_type = zipfile.ZIP_STORED)

+        fileList = []

+        fileList.append(os.path.join('META-INF', 'container.xml'))

+        fileList.append(os.path.join('OEBPS', 'content.opf'))

+        for itemPath in EpubBook.__listManifestItems(os.path.join('OEBPS', 'content.opf')):

+            fileList.append(os.path.join('OEBPS', itemPath))

+        for filePath in fileList:

+            fout.write(filePath, compress_type = zipfile.ZIP_DEFLATED)

+        fout.close()

+        os.chdir(cwd)

+

+    @staticmethod

+    def checkEpub(checkerPath, epubPath):

+        subprocess.call(['java', '-jar', checkerPath, epubPath], shell = True)

+

+    def createBook(self, rootDir):

+        if self.titlePage:

+            self.__makeTitlePage()

+        if self.tocPage:

+            self.__makeTocPage()

+        self.rootDir = rootDir

+        self.makeDirs()

+        self.__writeMimeType()

+        self.__writeItems()

+        self.__writeContainerXML()

+        self.__writeContentOPF()

+        self.__writeTocNCX()

+

+

+def test():

+    def getMinimalHtml(text):

+        return """<!DOCTYPE html PUBLIC "-//W3C//DTD XHtml 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

+<html xmlns="http://www.w3.org/1999/xhtml">

+<head><title>%s</title></head>

+<body><p>%s</p></body>

+</html>

+""" % (text, text)

+

+    book = EpubBook()

+    book.setTitle('Most Wanted Tips for Aspiring Young Pirates')

+    book.addCreator('Monkey D Luffy')

+    book.addCreator('Guybrush Threepwood')

+    book.addMeta('contributor', 'Smalltalk80', role = 'bkp')

+    book.addMeta('date', '2010', event = 'publication')

+

+    book.addTitlePage()

+    book.addTocPage()

+    book.addCover(r'D:\epub\blank.png')

+

+    book.addCss(r'main.css', 'main.css')

+

+    n1 = book.addHtml('', '1.html', getMinimalHtml('Chapter 1'))

+    n11 = book.addHtml('', '2.html', getMinimalHtml('Section 1.1'))

+    n111 = book.addHtml('', '3.html', getMinimalHtml('Subsection 1.1.1'))

+    n12 = book.addHtml('', '4.html', getMinimalHtml('Section 1.2'))

+    n2 = book.addHtml('', '5.html', getMinimalHtml('Chapter 2'))

+

+    book.addSpineItem(n1)

+    book.addSpineItem(n11)

+    book.addSpineItem(n111)

+    book.addSpineItem(n12)

+    book.addSpineItem(n2)

+

+    # You can use both forms to add TOC map

+    #t1 = book.addTocMapNode(n1.destPath, '1')

+    #t11 = book.addTocMapNode(n11.destPath, '1.1', parent = t1)

+    #t111 = book.addTocMapNode(n111.destPath, '1.1.1', parent = t11)

+    #t12 = book.addTocMapNode(n12.destPath, '1.2', parent = t1)

+    #t2 = book.addTocMapNode(n2.destPath, '2')

+

+    book.addTocMapNode(n1.destPath, '1')

+    book.addTocMapNode(n11.destPath, '1.1', 2)

+    book.addTocMapNode(n111.destPath, '1.1.1', 3)

+    book.addTocMapNode(n12.destPath, '1.2', 2)

+    book.addTocMapNode(n2.destPath, '2')

+

+    rootDir = r'd:\epub\test'

+    book.createBook(rootDir)

+    EpubBook.createArchive(rootDir, rootDir + '.epub')

+    #EpubBook.checkEpub('epubcheck-1.0.5.jar', rootDir + '.epub')

+

+if __name__ == '__main__':

+    test()
\ No newline at end of file
diff --git a/epub/ez_epub.py b/epub/ez_epub.py
new file mode 100644
index 00000000..afd2dbff
--- /dev/null
+++ b/epub/ez_epub.py
@@ -0,0 +1,38 @@
+#! /usr/local/bin/python

+#-*- coding: utf-8 -*-

+

+import epub

+from genshi.template import TemplateLoader

+

+class Section:

+

+    def __init__(self):

+        self.title = ''

+        self.paragraphs = []

+        self.tocDepth = 1

+

+def makeBook(title, authors, sections, outputDir, lang='en-US', cover=None):

+    book = epub.EpubBook()

+    book.setLang(lang)

+    book.setTitle(title)

+    for author in authors:

+        book.addCreator(author)

+    #book.addTitlePage()

+    #book.addTocPage()

+    #if cover:

+        #book.addCover(cover)

+

+    loader = TemplateLoader('./epub/templates')

+    tmpl = loader.load('ez-section.html')

+

+    for i, section in enumerate(sections):

+        stream = tmpl.generate(section = section)

+        html = stream.render('xhtml', doctype='xhtml11', drop_xml_decl=False)

+        item = book.addHtml('', 's%d.html' % (i + 1), html)

+        book.addSpineItem(item)

+        book.addTocMapNode(item.destPath, section.title, section.tocDepth)

+

+    outputFile = outputDir + 'article.epub'

+    book.createBook(outputDir)

+    book.createArchive(outputDir, outputFile)

+    #book.checkEpub('epubcheck-1.0.5.jar', outputFile)
\ No newline at end of file
diff --git a/epub/templates/container.xml b/epub/templates/container.xml
new file mode 100644
index 00000000..eecf7a0d
--- /dev/null
+++ b/epub/templates/container.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
+  <rootfiles>
+    <rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
+  </rootfiles>
+</container>
diff --git a/epub/templates/content.opf b/epub/templates/content.opf
new file mode 100644
index 00000000..67f3f5c6
--- /dev/null
+++ b/epub/templates/content.opf
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<opf:package xmlns:opf="http://www.idpf.org/2007/opf"
+    xmlns:dc="http://purl.org/dc/elements/1.1/"
+    xmlns:py="http://genshi.edgewall.org/"
+    unique-identifier="bookid" version="2.0">
+  <opf:metadata >
+    <dc:identifier id="bookid">urn:uuid:${book.UUID}</dc:identifier>
+    <dc:language>${book.lang}</dc:language>
+    <dc:title>${book.title}</dc:title>
+    <py:for each="name, role in book.creators">
+    <dc:creator opf:role="$role">$name</dc:creator>
+    </py:for>
+    <py:for each="beginTag, content, endTag in book.getMetaTags()">
+    ${Markup(beginTag)}$content${Markup(endTag)}
+    </py:for>
+    <opf:meta name="cover" content="${book.coverImage.id}" py:if="book.coverImage"/>
+  </opf:metadata>
+  <opf:manifest>
+    <opf:item id="ncxtoc" media-type="application/x-dtbncx+xml" href="toc.ncx"/>
+    <py:for each="item in book.getAllItems()">
+    <opf:item id="${item.id}" media-type="${item.mimeType}" href="${item.destPath}"/>
+    </py:for>
+  </opf:manifest>
+  <opf:spine toc="ncxtoc">
+    <py:for each="_, item, linear in book.getSpine()">
+    <opf:itemref idref="${item.id}" linear="${'yes' if linear else 'no'}"/>
+    </py:for>
+  </opf:spine>
+  <opf:guide py:if="book.guide">
+    <py:for each="href, title, type in book.getGuide()">
+    <opf:reference href="$href" type="$type" title="$title"/>
+    </py:for>
+  </opf:guide>
+</opf:package>
diff --git a/epub/templates/ez-section.html b/epub/templates/ez-section.html
new file mode 100644
index 00000000..0a715e7f
--- /dev/null
+++ b/epub/templates/ez-section.html
@@ -0,0 +1,17 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+    xmlns:py="http://genshi.edgewall.org/">
+<head>
+  <title>${section.title}</title>
+  <style type="text/css">
+h1 {
+  text-align: center;
+}
+  </style>
+</head>
+<body>
+  <h1>${section.title}</h1>
+  <py:for each="p in section.paragraphs">
+  <p>$p</p>
+  </py:for>
+</body>
+</html>
diff --git a/epub/templates/image.html b/epub/templates/image.html
new file mode 100644
index 00000000..9a838c7e
--- /dev/null
+++ b/epub/templates/image.html
@@ -0,0 +1,16 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+    xmlns:py="http://genshi.edgewall.org/">
+<head>
+  <title>${item.destPath}</title>
+  <style type="text/css">
+div, img {
+	border: 0;
+	margin: 0;
+	padding: 0;
+}
+  </style>
+</head>
+<body>
+  <div><img src="${item.destPath}" alt="${item.destPath}"/></div>
+</body>
+</html>
diff --git a/epub/templates/title-page.html b/epub/templates/title-page.html
new file mode 100644
index 00000000..de0f55f0
--- /dev/null
+++ b/epub/templates/title-page.html
@@ -0,0 +1,22 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+    xmlns:py="http://genshi.edgewall.org/">
+<head>
+  <title>${book.title}</title>
+  <style type="text/css">
+.title, .authors {
+  text-align: center;
+}
+span.author {
+  margin: 1em;
+}
+  </style>
+</head>
+<body>
+  <h1 class="title">${book.title}</h1>
+  <h3 class="authors">
+  <py:for each="creator, _ in book.creators">
+  <span class="author">$creator</span>
+  </py:for>
+  </h3>
+</body>
+</html>
diff --git a/epub/templates/toc.html b/epub/templates/toc.html
new file mode 100644
index 00000000..b14c9da3
--- /dev/null
+++ b/epub/templates/toc.html
@@ -0,0 +1,32 @@
+<html xmlns="http://www.w3.org/1999/xhtml"
+    xmlns:py="http://genshi.edgewall.org/">
+<head>
+  <title>${book.title}</title>
+  <style type="text/css">
+.tocEntry-1 {
+}
+.tocEntry-2 {
+	text-indent: 1em;
+}
+.tocEntry-3 {
+	text-indent: 2em;
+}
+.tocEntry-4 {
+	text-indent: 3em;
+}
+  </style>
+</head>
+<body>
+  <py:def function="tocEntry(node)">
+    <div class="tocEntry-${node.depth}">
+      <a href="${node.href}">${node.title}</a>
+    </div>
+    <py:for each="child in node.children">
+    ${tocEntry(child)}
+    </py:for>
+  </py:def>
+  <py:for each="child in book.getTocMapRoot().children">
+  ${tocEntry(child)}
+  </py:for>
+</body>
+</html>
diff --git a/epub/templates/toc.ncx b/epub/templates/toc.ncx
new file mode 100644
index 00000000..e7dd391a
--- /dev/null
+++ b/epub/templates/toc.ncx
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/"
+    xmlns:py="http://genshi.edgewall.org/"
+    version="2005-1">
+  <head>
+    <meta name="dtb:uid" content="urn:uuid:${book.UUID}"/>
+    <meta name="dtb:depth" content="${book.getTocMapHeight()}"/>
+    <meta name="dtb:totalPageCount" content="0"/>
+    <meta name="dtb:maxPageNumber" content="0"/>
+  </head>
+  <docTitle>
+    <text>${book.title}</text>
+  </docTitle>
+  <navMap>
+    <py:def function="navPoint(node)">
+    <navPoint id="navPoint-${node.playOrder}" playOrder="${node.playOrder}">
+      <navLabel><text>${node.title}</text></navLabel>
+      <content src="${node.href}"/>
+      <py:for each="child in node.children">
+      ${navPoint(child)}
+      </py:for>
+    </navPoint>
+    </py:def>
+    <py:for each="child in book.getTocMapRoot().children">
+    ${navPoint(child)}
+    </py:for>
+  </navMap>
+</ncx>
diff --git a/pyAggr3g470r.py b/pyAggr3g470r.py
index 6174945f..610b69b4 100755
--- a/pyAggr3g470r.py
+++ b/pyAggr3g470r.py
@@ -491,6 +491,8 @@ class Root:
                                 (article[6], article[6])
                 html += """<br />\n<a href="/plain_text/%s:%s">Plain text</a>\n""" % \
                                 (feed_id, article_id)
+                html += """\n<a href="/epub/%s:%s">Export to epub</a>\n""" % \
+                                (feed_id, article_id)
                 html += """<br />\n<a href="%s">Complete story</a>\n<br />\n""" % \
                                 (article[3].encode('utf-8'),)
                 # Share this article:
@@ -1100,6 +1102,10 @@ class Root:
     drop_base.exposed = True
 
 
+    #
+    # Export functions
+    #
+
     def export(self, export_method):
         """
         Export articles stored in the SQLite database in text
@@ -1150,6 +1156,7 @@ class Root:
                     content += article[4].encode('utf-8')
                     content += "</div>\n<hr />\n"
                     content += htmlfooter
+
                 # Export for dokuwiki
                 # example: http://wiki.cedricbonhomme.org/doku.php/news-archives
                 elif export_method == "export_dokuwiki":
@@ -1160,12 +1167,14 @@ class Root:
                                 (article[3].encode('utf-8'), article[2].encode('utf-8'))
                     content += article[4].encode('utf-8')
                     content += '</div>\n<hr />Generated with <a href="http://bitbucket.org/cedricbonhomme/pyaggr3g470r/">pyAggr3g470r</a>\n</html>'
+
                 # Export all articles in RSS format
                 elif export_method == "export_RSS":
                     content += """<item>\n<title>%s</title>\n<link>%s</link>\n""" % (article[2], article[3])
                     content += """<pubDate>%s</pubDate>\n""" % (str(article[1]),)
                     content += """<description><![CDATA[%s]]></description>""" % (article[4],)
                     content += "</item>\n"
+
                 # Export all articles in raw text
                 elif export_method == "export_TXT":
                     content = "Title: " + article[2].encode('utf-8') + "\n\n\n"
@@ -1184,6 +1193,41 @@ class Root:
     export.exposed = True
 
 
+    def epub(self, param):
+        """
+        Export article(s) to epub.
+        """
+        try:
+            from epub import ez_epub
+        except Exception, e:
+            return self.error_page(e)
+        try:
+            feed_id, article_id = param.split(':')
+        except:
+            return self.error_page("Bad URL")
+        try:
+            articles_list = self.articles[feed_id]
+        except KeyError:
+            return self.error_page("This feed do not exists.")
+        try:
+            folder = utils.path + "/var/export/epub/"
+            os.makedirs(folder)
+        except OSError:
+            return self.error_page(utils.path + "var/export/epub/"+" already exists.\nYou should delete this folder.")
+        for article in articles_list:
+            if article_id == article[0]:
+                section = ez_epub.Section()
+                section.title = article[2]
+                section.paragraphs = [utils.clear_string(article[4])]
+                ez_epub.makeBook(article[2], [self.feeds[feed_id][3]], [section], \
+                        os.path.normpath(folder + "article"), lang='en-US', cover=None)
+                break
+
+    epub.exposed = True
+
+
+
+
     def update(self, path=None, event = None):
         """
         Synchronizes transient objects (dictionary of feed and articles)
@@ -1207,6 +1251,11 @@ class Root:
         else:
             print "Base (%s) empty!" % utils.sqlite_base
 
+
+    #
+    # Monitoring functions
+    #
+
     def watch_base(self):
         """Monitor a file.
 
@@ -1274,4 +1323,4 @@ if __name__ == '__main__':
         thread_watch_base = threading.Thread(None, root.watch_base_classic, None, ())
     thread_watch_base.setDaemon(True)
     thread_watch_base.start()
-    cherrypy.quickstart(root, config=path)
+    cherrypy.quickstart(root, config=path)
\ No newline at end of file