Paging for threads and posts! #314

[zzz-spline-forum.git] / splinext / forum / model / __init__.py

diff --git a/splinext/forum/model/__init__.py b/splinext/forum/model/__init__.py
index 5ee242b..6dc6bfd 100644 (file)
--- a/splinext/forum/model/__init__.py
+++ b/splinext/forum/model/__init__.py
@@ -1,29 +1,90 @@
-from sqlalchemy import Column, ForeignKey
+from datetime import datetime
+
+from sqlalchemy import and_, Column, ForeignKey, Index
 from sqlalchemy.orm import relation
-from sqlalchemy.types import DateTime, Integer, Unicode
+from sqlalchemy.types import DateTime, Enum, Integer, Unicode
 
 from spline.model.meta import TableBase
+from splinext.users import model as users_model
+
+
+### Core
 
 class Forum(TableBase):
     __tablename__ = 'forums'
     id = Column(Integer, primary_key=True, autoincrement=True, nullable=False)
     name = Column(Unicode(133), nullable=False)
+    description = Column(Unicode(1024), nullable=False, default=u'', server_default=u'')
+    access_level = Column(Enum(u'normal', u'soapbox', u'archive', name='forums_access_level'), nullable=False, default=u'normal', server_default=u'normal')
+
+    def can_create_thread(self, user):
+        """Returns True ifff the named user can make a new thread in this
+        forum.
+        """
+        if not user.can('forum:create-thread'):
+            return False
+
+        if self.access_level == u'soapbox' and \
+            not user.can('forum:override-soapbox'):
+            return False
+
+        if self.access_level == u'archive' and \
+            not user.can('forum:override-archive'):
+            return False
+
+        return True
 
 class Thread(TableBase):
     __tablename__ = 'threads'
     id = Column(Integer, primary_key=True, autoincrement=True, nullable=False)
     forum_id = Column(Integer, ForeignKey('forums.id'), nullable=False)
+    icon = Column(Unicode(32), nullable=True)
     subject = Column(Unicode(133), nullable=False)
+    post_count = Column(Integer, nullable=False, default=0, index=True)
+
+    def specific_post(self, position):
+        """Returns post number `position` in this thread.
+
+        Positions are one-indexed.  Negative indexes are allowed.
+        """
+
+        # Handle negative indexes
+        if position < 0:
+            position = self.post_count + position + 1
+
+        return self.posts.filter_by(position=position).one()
+
+    def can_create_post(self, user):
+        """Returns True ifff the named user can make a new post in this thread.
+        """
+        if not user.can('forum:create-post'):
+            return False
+
+        if self.forum.access_level == u'archive' and \
+            not user.can('forum:override-archive'):
+            return False
+
+        return True
 
 class Post(TableBase):
     __tablename__ = 'posts'
     id = Column(Integer, primary_key=True, autoincrement=True, nullable=False)
     thread_id = Column(Integer, ForeignKey('threads.id'), nullable=False)
-    posted_time = Column(DateTime, nullable=False)
+    position = Column(Integer, nullable=False)
+    author_user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
+    posted_time = Column(DateTime, nullable=False, index=True, default=datetime.now)
+    raw_content = Column(Unicode(5120), nullable=False)
     content = Column(Unicode(5120), nullable=False)
 
+Index('thread_position', Post.thread_id, Post.position, unique=True)
+
 
 # XXX sort by time, how?
-Forum.threads = relation(Thread, order_by=Thread.id.desc(), backref='forum')
+Forum.threads = relation(Thread, order_by=Thread.id.desc(), lazy='dynamic', backref='forum')
+
+Thread.posts = relation(Post, order_by=Post.position.asc(), lazy='dynamic', backref='thread')
+Thread.first_post = relation(Post, primaryjoin=and_(Post.thread_id == Thread.id, Post.position == 1), uselist=False)
+# XXX THIS WILL NEED TO CHANGE when posts can be deleted!  Or change what 'position' means
+Thread.last_post = relation(Post, primaryjoin=and_(Post.thread_id == Thread.id, Post.position == Thread.post_count), uselist=False)
 
-Thread.posts = relation(Post, order_by=Post.posted_time.desc(), backref='thread')
+Post.author = relation(users_model.User, backref='posts')