Merge branch 'master' of github.com:FinalsClub/karmaworld
[oweals/karmaworld.git] / karmaworld / apps / notes / models.py
index 7b1f0b3c7d3a0bf0bfaba1cb58d332dd0455451a..f34bb333deb06c67bdce09d312544c842f17f83e 100644 (file)
@@ -8,13 +8,23 @@
 """
 import datetime
 
-from django.template import defaultfilters
+from django.conf import settings
+from django.core.files.storage import FileSystemStorage
 from django.db import models
-from taggit.managers import TaggableManager
+from django.template import defaultfilters
+from lxml.html import fromstring, tostring
 from oauth2client.client import Credentials
+from taggit.managers import TaggableManager
 
 from karmaworld.apps.courses.models import Course
 
+try:
+    from secrets.drive import GOOGLE_USER
+except:
+    GOOGLE_USER = u'admin@karmanotes.org'
+
+fs = FileSystemStorage(location=settings.MEDIA_ROOT)
+
 class Note(models.Model):
     """ A django model representing an uploaded file and associated metadata.
     """
@@ -31,53 +41,100 @@ class Note(models.Model):
     tags            = TaggableManager(blank=True)
 
     name            = models.CharField(max_length=255, blank=True, null=True)
-    slug            = models.SlugField(null=True)
+    slug            = models.SlugField(max_length=255, null=True)
+    year            = models.IntegerField(blank=True, null=True, 
+                        default=datetime.datetime.utcnow().year)
     desc            = models.TextField(max_length=511, blank=True, null=True)
     uploaded_at     = models.DateTimeField(null=True, default=datetime.datetime.utcnow)
 
-    file_type   = models.CharField(max_length=15, blank=True, null=True, choices=FILE_TYPE_CHOICES, default=UNKNOWN_FILE)
+    file_type       = models.CharField(max_length=15,
+                            choices=FILE_TYPE_CHOICES,
+                            default=UNKNOWN_FILE,
+                            blank=True, null=True)
+
     # Upload files to MEDIA_ROOT/notes/YEAR/MONTH/DAY, 2012/10/30/filename
-    note_file   = models.FileField(upload_to="notes/%Y/%m/%j/", blank=True, null=True)
+    note_file       = models.FileField(
+                            storage=fs,
+                            upload_to="notes/%Y/%m/%j/",
+                            blank=True, null=True)
 
     ## post gdrive conversion data
-    embed_url   = models.URLField(max_length=1024, blank=True, null=True)
-    download_url = models.URLField(max_length=1024, blank=True, null=True)
+    embed_url       = models.URLField(max_length=1024, blank=True, null=True)
+    download_url    = models.URLField(max_length=1024, blank=True, null=True)
     # for word processor documents
-    html        = models.TextField(blank=True, null=True)
-    text        = models.TextField(blank=True, null=True)
+    html            = models.TextField(blank=True, null=True)
+    text            = models.TextField(blank=True, null=True)
 
-    # FIXME: Not Implemented
-    #uploader    = models.ForeignKey(User, blank=True, null=True, related_name='notes')
-    #course      = models.ForeignKey(Course, blank=True, null=True, related_name="files")
-    #school      = models.ForeignKey(School, blank=True, null=True)
+
+    class Meta:
+        """ Sort files by most recent first """
+        ordering = ['-uploaded_at']
 
 
     def __unicode__(self):
         return u"{0}: {1} -- {2}".format(self.file_type, self.name, self.uploaded_at)
 
-
     def save(self, *args, **kwargs):
         """ override built-in save to ensure contextual self.name """
         # TODO: If self.name isn't set, generate one based on uploaded_name
         # if we fail to set the Note.name earlier than this, use the saved filename
 
-        if not self.slug:
-            self.slug = defaultfilters.slugify(self.name)
-        super(Note, self).save(*args, **kwargs)
+        # only generate a slug if the name has been set, and slug hasn't
+        if not self.slug and self.name:
+            slug = defaultfilters.slugify(self.name)
+            cursor = Note.objects.filter(slug=slug)
+            # If there are no other notes with this slug, then the slug does not need an id
+            if cursor.count() == 0:
+                self.slug = slug
+            else:
+                super(Note, self).save(*args, **kwargs) # generate self.id
+                self.slug = defaultfilters.slugify("%s %s" % (self.name, self.id))
+            super(Note, self).save(*args, **kwargs)
+
+        # Check if Note.uploaded_at is after Course.updated_at
+        if self.uploaded_at and self.uploaded_at > self.course.updated_at:
+            self.course.updated_at = self.uploaded_at
+            # if it is, update Course.updated_at
+            self.course.save()
 
+        super(Note, self).save(*args, **kwargs)
 
     def get_absolute_url(self):
         """ Resolve note url, use 'note' route and slug if slug
             otherwise use note.id
         """
-        if self.slug == None:
+        if self.slug is not None:
+            # return a url ending in slug
             return u"/{0}/{1}/{2}".format(self.course.school.slug, self.course.slug, self.slug)
         else:
+            # return a url ending in id
             return u"/{0}/{1}/{2}".format(self.course.school.slug, self.course.slug, self.id)
 
+    def sanitize_html(self, save=True):
+        """ if self contains html, find all <a> tags and add target=_blank 
+            takes self
+            returns True/False on succ/fail and error or count
+        """
+        # build a tag sanitizer
+        def add_attribute_target(tag):
+            tag.attrib['target'] = '_blank'
+
+        # if no html, return false
+        if not self.html:
+            return False, "Note has no html"
+
+        _html = fromstring(self.html)
+        a_tags = _html.findall('.//a') # recursively find all a tags in document tree
+        # if there are a tags
+        if a_tags > 1:
+            #apply the add attribute function
+            map(add_attribute_target, a_tags)
+            self.html = _html
+            if save:
+                self.save()
+            return True, len(a_tags)
+
 
-# FIXME: replace the following GOOGLE_USER in a settings.py
-GOOGLE_USER = 'seth.woodworth@gmail.com'
 
 class DriveAuth(models.Model):
     """ stored google drive authentication and refresh token