437 lines
15 KiB
Python
437 lines
15 KiB
Python
import os
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import datetime
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import xml
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from xml.parsers.expat import *
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from xml.dom.minidom import parse, parseString
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from dynastie.generators.generator import DynastieGenerator, StrictUTF8Writer
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from django.db import models
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class Index(DynastieGenerator):
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cur_page = 0
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nb_pages = 0
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cur_post = 0
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cur_post_obj = None
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posts_per_page = 0
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filename = 'index'
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dirname = ''
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blog = None
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def __init__(self, hash_posts=None, hash_posts_content=None):
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DynastieGenerator.__init__(self, hash_posts, hash_posts_content)
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self.hooks = {'posts' : self.createPosts,
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'title' : self.createTitle,
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'date' : self.createDate,
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'navigation' : self.createNavigation,
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'recents' : self.createRecents,
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'tags' : self.createTags,
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'replace' : self.createReplace}
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self.first_try = True
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def createReplace(self, posts, dom, root, replace_elem):
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if not replace_elem.hasAttribute('div_name'):
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self.addError('No attribute div_name for a replace tag')
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return
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div_element = replace_elem.cloneNode(True)
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div_element.tagName = replace_elem.getAttribute('div_name')
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div_element.removeAttribute('div_name')
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for key,value in replace_elem.attributes.items():
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if key == 'div_name': continue
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value = value.replace('dyn:blog_id', str(self.blog.id))
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div_element.setAttribute(key, value)
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root.replaceChild(div_element, replace_elem)
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return div_element
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def createNavigation(self, posts, dom, root, node):
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if self.nb_pages == 0 or self.nb_pages == 1:
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return None
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if self.dirname != '':
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if self.dirname.startswith('/'):
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href = '<a href="' + self.dirname + '/' + self.filename
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else:
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href = '<a href="/' + self.dirname + '/' + self.filename
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else:
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href = '<a href="/' + self.filename
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nav = ''
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if self.cur_page != 0:
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nav = nav + href + '.html"><< First</a> '
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if self.cur_page == 1:
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nav = nav + href + '.html">< Prev</a> '
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else:
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nav = nav + href + str(self.cur_page-1) + '.html">< Prev</a> '
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start = self.cur_page-5
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if start < 0:
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start = 0
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end = start + 10
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if end > self.nb_pages:
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end = self.nb_pages
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for i in range(start, end):
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if i == self.cur_page:
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nav = nav + str(i+1) + ' '
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else:
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if i == 0:
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nav = nav + href + '.html">1</a> '
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else:
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nav = nav + href + str(i) + '.html">' + str(i+1) + '</a> '
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if self.cur_page < self.nb_pages-1:
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nav = nav + href + str(self.cur_page+1) + '.html">Next ></a> '
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nav = nav + href + str(self.nb_pages-1) + '.html">Last >></a>'
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new_dom = parseString('<div class="navigation">' + nav + '</div>')
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new_node = new_dom.getElementsByTagName('div')[0]
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res = new_node.cloneNode(True)
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root.replaceChild(res, node)
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return res
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def createTitle(self, posts, dom, root, title_elem):
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create_link = (title_elem.getAttribute('link') == '1')
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post = self.cur_post_obj
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if create_link == True:
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node = self.createElement(dom, 'title')
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node.appendChild(self.createLinkElem(dom, post.getPath(), post.title))
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else:
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node = self.createElement(dom, 'title', post.title)
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root.replaceChild(node, title_elem)
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def createDate(self, posts, dom, root, date_elem):
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date_format = date_elem.getAttribute('format')
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if date_format == '':
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date_format = '%A, %d %B %Y %H:%m'
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post = self.cur_post_obj
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node = self.createElement(dom, 'date', post.creation_date.strftime(date_format))
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root.replaceChild(node, date_elem)
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def createPost(self, posts, dom, post_elem, root):
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post = self.cur_post_obj
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if post.id in self.hash_posts and not self.first_try:
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node = self.hash_posts[post.id]
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return node.cloneNode(0)
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values = {}
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values['author'] = post.author.first_name + ' ' + post.author.last_name
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values['post_content'] = ''
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blog = post.blog
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blog.create_paths()
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filename = blog.src_path + '/_post/' + str(post.id)
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if not os.path.exists(filename):
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self.addError('File does not exists ' + filename)
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return None
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if not filename in self.hash_posts_content:
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f = open(filename, 'rb')
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post_content = f.read()
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f.close()
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self.hash_posts_content[filename] = post_content
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else:
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post_content = self.hash_posts_content[filename]
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while True:
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start = post_content.find('<dyn:code')
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if start == -1: break
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end = post_content.find('</dyn:code>')
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if end < start:
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self.addError('Invalid <dyn:code> tags in ' + filename)
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break
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try:
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dom2 = parseString(post_content[start:end+11])
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except xml.dom.DOMException as e:
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self.addError('Error parsing ' + filename)
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break
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res = self.createCode(dom2, dom2.firstChild)
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post_content = post_content.replace(post_content[start:end+11], res)
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self.simpleTransform(values, dom, post_elem, root)
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content_nodes = post_elem.getElementsByTagName('div')
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post_transform = ['post_content']
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for content_node in content_nodes:
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the_class = content_node.getAttribute('class')
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if not the_class in post_transform:
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continue
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new_node = dom.createTextNode(post_content)
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content_node.appendChild(new_node)
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if post.id in self.hash_posts:
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import hashlib
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# Here, we are in first_try, check that computed
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# post has the same result than the one in cache
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self.first_try = False
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writer = StrictUTF8Writer()
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node = self.hash_posts[post.id]
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node.writexml(writer)
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content1 = writer.getvalue().encode('utf-8')
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writer = StrictUTF8Writer()
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post_elem.writexml(writer)
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content2 = writer.getvalue().encode('utf-8')
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md5_1 = hashlib.md5()
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md5_1.update(content1)
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md5_2 = hashlib.md5()
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md5_2.update(content2)
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# If not, clear cache
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if md5_1.digest() != md5_2.digest():
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self.hash_posts = {}
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self.hash_posts[post.id] = post_elem.cloneNode(0)
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return post_elem
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def createPosts(self, posts, dom, root, node):
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posts_elem = self.createElement(dom, 'posts')
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create_link = (node.getAttribute('link') == '1')
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for i in range(0, self.posts_per_page):
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post_elem = self.createElement(dom, 'post')
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if len(posts) > self.cur_post:
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self.cur_post_obj = posts[self.cur_post]
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post_elem = self.createPost(posts, dom, post_elem, node)
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else:
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post_elem = self.createElement(dom, '', '<b>No posts yet</b>')
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self.cur_post_obj = None
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if not post_elem is None:
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posts_elem.appendChild(post_elem)
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# Parse inner HTML
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self._parse(self.hooks, posts, dom, post_elem)
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self.cur_post = self.cur_post + 1
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if self.cur_post == len(posts):
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break
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root.replaceChild(posts_elem, node)
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return posts_elem
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def createRecents(self, posts, dom, root, node):
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if self.cur_post == len(posts):
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root.removeChild(node)
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return
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if node.hasAttribute("limit"):
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nb_recents = int(node.getAttribute("limit"))
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else:
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nb_recents = 5
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recents_elem = self.createElement(dom, 'recents')
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for child in node.childNodes:
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recents_elem.appendChild(child.cloneNode(True))
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list_elem = dom.createElement('ul')
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for i in range(0, nb_recents):
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post_elem = dom.createElement('li')
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if self.cur_post+i < len(posts):
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post = posts[self.cur_post+i]
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link_elem = self.createLinkElem(dom, post.getPath(), post.title)
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post_elem.appendChild(link_elem)
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else:
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break
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list_elem.appendChild(post_elem)
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recents_elem.appendChild(list_elem)
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root.replaceChild(recents_elem, node)
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return recents_elem
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def createTags(self, posts, dom, root, node):
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from dynastie.models import Post
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tags_elem = self.createElement(dom, 'tags')
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create_link = (node.getAttribute('link') == '1')
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if type(posts) == models.query.QuerySet:
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if len(posts) > self.cur_post:
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cur_post = posts[self.cur_post]
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else:
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cur_post = None
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elif type(posts) == Post:
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cur_post = posts
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else:
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cur_post = None
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if not cur_post is None:
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for tag in cur_post.tags.all():
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if create_link:
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tag_elem = self.createElement(dom, 'tag')
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link_elem = self.createLinkElem(dom, '/tag/' + tag.name_slug, '#' + tag.name)
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tag_elem.appendChild(link_elem)
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else:
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tag_elem = self.createElement(dom, 'tag', '#' + tag.name)
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tags_elem.appendChild(tag_elem)
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if len(cur_post.tags.all()) == 0:
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root.removeChild(node)
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return None
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else:
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root.replaceChild(tags_elem, node)
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else:
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root.removeChild(node)
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return None
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return tags_elem
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def createCode(self, dom, node):
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try:
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from pygments import highlight
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from pygments.util import ClassNotFound
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from pygments.lexers import get_lexer_by_name
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from pygments.formatters import get_formatter_by_name
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except ImportError:
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self.addError('Pygments package is missing, please install it in order to use <dyn:code>')
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return
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language = node.getAttribute('language')
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if language is None:
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self.addWarning('No language defined for <dyn:code> assuming C language')
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language = "c"
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else:
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language = language.lower()
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lexer_options = {}
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try:
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lexer = get_lexer_by_name(language, **lexer_options)
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except ClassNotFound:
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self.addWarning('Language ' + language + ' not supported by current version of pygments')
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lexer = get_lexer_by_name('c', **lexer_options)
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formatter_options = {'classprefix' : 'color_emacs_', 'style' : 'emacs'}
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for k in node.attributes.keys():
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attr = node.attributes[k]
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if attr.prefix != '': continue
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if attr.name == 'language': continue
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name = attr.name
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value = attr.value
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if name == 'colouring':
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name = 'style'
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formatter_options['classprefix'] = 'color_' + value + '_'
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formatter_options[name] = value
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formatter = get_formatter_by_name('html', **formatter_options)
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lexer.encoding = 'utf-8'
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formatter.encoding = 'utf-8'
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writer = StrictUTF8Writer()
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node.firstChild.writexml(writer)
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code = writer.getvalue().encode('utf-8')
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r,w = os.pipe()
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r,w=os.fdopen(r,'r',0), os.fdopen(w,'w',0)
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highlight(code, lexer, formatter, w)
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w.close()
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code = r.read()
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r.close()
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# Remove <pre> after <div class="highlight">
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code = code[28:-13]
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code = '<div class="highlight">' + code + '</div>'
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return code
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def parseTemplate(self, blog, src, output, name, directory=None):
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self.blog = blog
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if not os.path.exists(src + '/_%s.html' % name):
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self.addError('No _%s.html found, exiting' % name)
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return None
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try:
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dom = parse(src + '/_%s.html' % name)
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except xml.dom.DOMException as e:
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self.addError('Error parsing _%s.html : ' + e)
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return None
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if not directory is None and not os.path.exists(output + '/' + directory):
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os.mkdir(output + '/' + directory)
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post_nodes = dom.getElementsByTagNameNS(self.URI, "posts")
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if not post_nodes is None:
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if post_nodes[0].hasAttribute("limit"):
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self.posts_per_page = int(post_nodes[0].getAttribute("limit"))
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else:
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self.posts_per_page = 5
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else:
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self.addError('No tag dyn:posts found')
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return dom
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def generatePages(self, dom, posts, src, output, name, directory=None):
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if len(posts) > self.posts_per_page:
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self.nb_pages = self.computeNbPages(len(posts), self.posts_per_page)
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if not directory is None and not os.path.exists(output + self.dirname):
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os.mkdir(output + self.dirname)
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filename = self.dirname + '/' + self.filename + '.html'
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impl = xml.dom.getDOMImplementation()
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while self.cur_page <= self.nb_pages:
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#print 'Generate ' + filename
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dom_ = impl.createDocument('', 'xml', None)
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dom_.replaceChild(dom.firstChild.cloneNode(0), dom_.firstChild)
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nodes = dom.getElementsByTagName("*")
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nodes[0] = self.parse(src, self.hooks, posts, dom_, nodes[0])
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self.writeIfNotTheSame(output + filename, nodes[0])
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self.cur_page = self.cur_page + 1
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filename = self.dirname + '/' + self.filename + str(self.cur_page) + '.html'
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filename = output + filename
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while os.path.exists(filename):
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self.addReport('Removing unused ' + filename)
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os.unlink(filename)
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filename = filename + '.gz'
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if os.path.exists(filename):
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self.addReport('Removing unused ' + filename)
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os.unlink(filename)
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self.cur_page = self.cur_page + 1
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filename = self.dirname + '/' + self.filename + str(self.cur_page) + '.html'
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filename = output + filename
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def generate(self, blog, src, output):
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from dynastie.models import Post, Blog
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dom = self.parseTemplate(blog, src, output, 'index')
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if dom is None: return self.report
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now = datetime.datetime.now()
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cur_year = now.year
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posts = Post.objects.filter(creation_date__year=cur_year, published=True, front_page=True).order_by('-creation_date')
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if posts.count() < self.posts_per_page:
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posts = Post.objects.filter(published=True, front_page=True).order_by('-creation_date')[:self.posts_per_page]
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self.dirname = ''
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self.generatePages(dom, posts, src, output, 'index')
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if not self.somethingWrote:
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self.addReport('Nothing changed')
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return self.report
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