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posts.py
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posts.py
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# -*- coding: utf-8 -*-
import codecs
import os
import re
import math
from post import Post, PostMeta
class Posts:
pattern = r"^\s*\d+\.\s*\[\[([^\|]*?)\|?([^\|]*?)\]\]" # 1. [[title|id]] or [[id]]
def __init__(self, working_dir=None, index=None, per_page=None):
self.working_dir = working_dir
self.index = index
self.per_page = per_page
self.post_metas = []
self.loaded_posts = {}
self.index_path = u"{0}/{1}.md".format(working_dir, index)
self.last_modified = 0
self.reload()
def get_posts(self, page):
posts = []
for i in range((page-1)*self.per_page, page*self.per_page):
if i >= len(self.post_metas):
break
posts.append(self.get_post(self.post_metas[i].post_id))
return posts
# TODO remove post instance if post is permanently deleted.
def get_post(self, post_id):
post = self.loaded_posts.get(post_id, None)
if post is None:
path = u"{0}/{1}.md".format(self.working_dir, post_id)
if os.path.exists(path):
post = Post(post_id, working_dir=self.working_dir)
self.loaded_posts[post_id] = post
else:
post.refresh()
return post
def get_recent_metas(self):
length = len(self.post_metas)
return self.post_metas[0:10] if length >= 10 else self.post_metas[0:length]
def get_num_of_pages(self):
return math.ceil(len(self.post_metas) / (self.per_page*1.0))
def refresh(self):
if self.is_up_to_date():
return
self.reload()
def is_up_to_date(self):
return self.get_last_modified() == self.last_modified
def get_last_modified(self):
return os.path.getmtime(self.index_path)
def reload(self):
self.last_modified = self.get_last_modified()
metas = []
f = codecs.open(self.index_path, 'r', 'utf-8')
# read whole file to give more flexible file format
for line in f:
match = re.match(Posts.pattern, line, re.U)
if match:
post_id = match.group(2)
path = u"{0}/{1}.md".format(self.working_dir, post_id)
if os.path.exists(path):
metas.append(PostMeta(post_id))
f.close()
self.post_metas = metas