quotes.py

   1 #!/usr/bin/env python
   2 # -*- encoding: utf-8 -*-
   3
   4 """ Gestion des quotes """
   5
   6 import datetime
   7 import time
   8 import re
   9 import json
  10 import random
  11
  12 import config
  13
  14 quote_matcher = re.compile(config.quote_regexp, flags=re.UNICODE)
  15 quote_matcher_with_timestamp = re.compile(config.quote_regexp_with_timestamp, flags=re.UNICODE)
  16
  17 def get_now():
  18     """ Renvoie la date actuelle """
  19     return datetime.datetime(*time.localtime()[:6])
  20
  21 class Quote(object):
  22     """ Une citation """
  23     def __init__(self, author, content, timestamp=None):
  24         if timestamp is None:
  25             timestamp = get_now()
  26         elif isinstance(timestamp, basestring):
  27             timestamp = datetime.datetime(*time.strptime(timestamp, u"%Y-%m-%d_%H:%M:%S")[:6])
  28         self.author = author
  29         self.content = content
  30         self.timestamp = timestamp
  31
  32     def jsonize(self):
  33         d = {"author" : self.author, "content" : self.content,
  34              "timestamp" : self.timestamp.strftime(u"%F_%T")}
  35         return d
  36
  37     def __unicode__(self):
  38         """ Retourne la quote affichable """
  39         return config.quote_template % self.__dict__
  40     def __str__(self):
  41         return unicode(self).encode("utf-8")
  42
  43     def __eq__(self, otherquote):
  44         """ Vérifie si cette phrase n'a pas déjà été dite par la même personne.
  45             Indépendamment de la date. """
  46         return [self.author, self.content] == [otherquote.author, otherquote.content]
  47
  48
  49 def parse(text, date=None):
  50     """ Parse le ``text`` et renvoie une quote ou None. """
  51     if date == None:
  52         date = get_now()
  53     get = quote_matcher.match(text)
  54     if not get is None:
  55         d = get.groupdict()
  56         return Quote(d["author"], d["content"], date)
  57
  58 def load_file(filename):
  59     """ Récupère les quotes depuis le fichier """
  60     with open(filename) as f:
  61         jsonquotes = json.load(f)
  62         quotes = [Quote(**q) for q in jsonquotes]
  63     return quotes
  64
  65 def save_file(quotes, filename):
  66     """ Enregistre les quotes dans le fichier """
  67     with open(filename, "w") as f:
  68         raws = [q.jsonize() for q in quotes]
  69         json.dump(raws, f)
  70
  71 class QuoteDB(object):
  72     """ Stocke et distribue des quotes. """
  73     def __init__(self):
  74         self.quotelist = []
  75
  76     def load(self):
  77         """ Charge le fichier de quotes dans la DB """
  78         self.quotelist = load_file(config.quote_file)
  79
  80     def save(self):
  81         """ Sauvegarde la DB dans le fichier de quotes """
  82         save_file(self.quotelist, config.quote_file)
  83
  84     def store(self, author, content, timestamp=None):
  85         """ Enregistre une nouvelle quote, sauf si elle existe déjà.
  86             Renvoie ``True`` si elle a été ajoutée, ``False`` si elle existait. """
  87         newquote = Quote(author, content, timestamp)
  88         if not newquote in self.quotelist:
  89             self.quotelist.append(newquote)
  90             return True
  91         return False
  92
  93     def __repr__(self):
  94         return repr(self.quotelist)
  95
  96     def random(self):
  97         """ Sort une quote aléatoire """
  98         return random.choice(self.quotelist)
  99     def randomfrom(self, author):
 100         """ Sort une quote aléatoire de ``author`` """
 101         return random.choice([q for q in self.quotelist if q.author == author])
 102
 103     def search(self, inquote=None, author=None, regexp=False):
 104         """Fait une recherche dans les quotes."""
 105         if regexp:
 106             if inquote is None:
 107                 inquote = ".*"
 108             if author is None:
 109                 author = ".*"
 110             qreg = re.compile(inquote, flags=re.UNICODE)
 111             areg = re.compile(author, flags=re.UNICODE)
 112             l = [q for q in self.quotelist if qreg.match(q.content) and areg.match(q.author)]
 113         else:
 114             if inquote is None:
 115                 inquote = ""
 116             if author is None:
 117                 author = ""
 118             l = [q for q in self.quotelist if inquote in q.content and author in q.author]
 119         return l
 120
 121     def search_authors(self, author=None, regexp=False):
 122         """Renvoie la liste des auteurs contenant ``author`` ou qui matchent la regexp."""
 123         if regexp:
 124             if author is None:
 125                 author = ".*"
 126             areg = re.compile(author, flags=re.UNICODE)
 127             l = list(set([q.author for q in self.quotelist if areg.match(q.author)]))
 128         else:
 129             if author is None:
 130                 author = ""
 131             l = list(set([q.author for q in self.quotelist if author in q.author]))
 132         return l
 133
 134 def dump(quotedb, dump_file=None):
 135     """Pour exporter les quotes dans un format readable vers un fichier."""
 136     if dump_file is None:
 137         dump_file = config.quote_dump_file
 138     t = "\n".join(["%s %s" % (q.timestamp.strftime("%F_%T"), q) for q in quotedb.quotelist]) + "\n"
 139     with open(dump_file, "w") as f:
 140         f.write(t)
 141
 142 def restore(dump_file=None):
 143     """Crée un DB de quotes en parsant le contenu d'un fichier de dump."""
 144     if dump_file is None:
 145         dump_file = config.quote_dump_file
 146     with open(dump_file) as f:
 147         t = f.read()
 148     t = t.decode("utf-8") # Oui, ça peut fail, mais on ne doit alors pas continuer
 149     l = [m.groupdict() for m in quote_matcher_with_timestamp.finditer(t)]
 150     # On instancie les quotes grâce aux dicos qui ont déjà la bonne tronche
 151     l = [Quote(**q) for q in l]
 152     newquotedb = QuoteDB()
 153     newquotedb.quotelist = l
 154     return newquotedb