[Schema+config change] Comment editing (#396)

* Comment editing
* Optional time limit for comment editing

config.example.py

@@ -127,3 +127,11 @@ ENABLE_ELASTIC_SEARCH_HIGHLIGHT = False
 ES_MAX_SEARCH_RESULT = 1000
 # ES index name generally (nyaa or sukebei)
 ES_INDEX_NAME = SITE_FLAVOR
+
+################
+## Commenting ##
+################
+
+# Time limit for editing a comment after it has been posted (seconds)
+# Set to 0 to disable
+EDITING_TIME_LIMIT = 0

migrations/versions/cf7bf6d0e6bd_add_edited_time_to_comments.py

@@ -0,0 +1,30 @@
+"""Add edited_time to Comments
+
+Revision ID: cf7bf6d0e6bd
+Revises: 500117641608
+Create Date: 2017-10-28 15:32:12.687378
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'cf7bf6d0e6bd'
+down_revision = '500117641608'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('nyaa_comments', sa.Column('edited_time', sa.DateTime(), nullable=True))
+    op.add_column('sukebei_comments', sa.Column('edited_time', sa.DateTime(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('sukebei_comments', 'edited_time')
+    op.drop_column('nyaa_comments', 'edited_time')
+    # ### end Alembic commands ###

nyaa/forms.py

@@ -184,7 +184,7 @@ class CommentForm(FlaskForm):
     comment = TextAreaField('Make a comment', [
         Length(min=3, max=1024, message='Comment must be at least %(min)d characters '
                'long and %(max)d at most.'),
-        DataRequired()
+        DataRequired(message='Comment must not be empty.')
     ])
 
 

nyaa/models.py

@@ -433,6 +433,7 @@ class CommentBase(DeclarativeHelperBase):
         return db.Column(db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'))
 
     created_time = db.Column(db.DateTime(timezone=False), default=datetime.utcnow)
+    edited_time = db.Column(db.DateTime(timezone=False), onupdate=datetime.utcnow)
     text = db.Column(TextType(collation=COL_UTF8MB4_BIN), nullable=False)
 
     @declarative.declared_attr
@@ -448,6 +449,15 @@ class CommentBase(DeclarativeHelperBase):
         ''' Returns a UTC POSIX timestamp, as seconds '''
         return (self.created_time - UTC_EPOCH).total_seconds()
 
+    @property
+    def editable_until(self):
+        return self.created_utc_timestamp + config['EDITING_TIME_LIMIT']
+
+    @property
+    def editing_limit_exceeded(self):
+        limit = config['EDITING_TIME_LIMIT']
+        return bool(limit and (datetime.utcnow() - self.created_time).total_seconds() >= limit)
+
 
 class UserLevelType(IntEnum):
     REGULAR = 0

nyaa/static/css/main.css

@@ -271,6 +271,10 @@ a.text-purple:hover, a.text-purple:active, a.text-purple:focus {
 	color: #a760e0;
 }
 
+.comment-details {
+	margin-bottom: 10px;
+}
+
 .comment-content {
 	overflow-wrap: break-word;
 }
@@ -286,11 +290,39 @@ a.text-purple:hover, a.text-purple:active, a.text-purple:focus {
 	margin-bottom: 10px;
 }
 
-.delete-comment-form {
+.comment-actions {
 	position: relative;
 	float: right;
 }
 
+.delete-comment-form {
+	display: inline-block;
+}
+
+.edit-comment-box {
+	display: none;
+}
+
+.is-editing .edit-comment-box {
+	display: block;
+}
+
+.is-editing .comment-content {
+	display: none;
+}
+
+.edit-waiting {
+	float: right;
+	width: 20px;
+	height: 20px;
+	border: 2px solid;
+	border-color: gray transparent;
+	border-radius: 100%;
+	position: relative;
+	top: 4px;
+	animation: fa-spin 1s infinite linear;
+}
+
 #comment {
 	height: 8em;
 }

nyaa/static/js/main.js

@@ -74,6 +74,52 @@ $(document).ready(function() {
 		$(this).blur().children('i').toggleClass('fa-folder-open fa-folder');
 		$(this).next().stop().slideToggle(250);
 	});
+
+	$('.edit-comment').click(function(e) {
+		e.preventDefault();
+		$(this).closest('.comment').toggleClass('is-editing');
+	});
+
+	$('[data-until]').each(function() {
+		var $this = $(this),
+			text = $(this).text(),
+			until = $this.data('until');
+		
+		var displayTimeRemaining = function() {
+			var diff = Math.max(0, until - (Date.now() / 1000) | 0),
+				min = Math.floor(diff / 60),
+				sec = diff % 60;
+			$this.text(text + ' (' + min + ':' + ('00' + sec).slice(-2) + ')');
+		};
+
+		displayTimeRemaining();
+		setInterval(displayTimeRemaining, 1000);
+	});
+
+	$('.edit-comment-box').submit(function(e) {
+		e.preventDefault();
+
+		var $this = $(this),
+			$submitButton = $this.find('[type=submit]').attr('disabled', 'disabled'),
+			$waitIndicator = $this.find('.edit-waiting').show()
+			$errorStatus = $this.find('.edit-error').empty();
+
+		$.ajax({
+			type: $this.attr('method'),
+			url: $this.attr('action'),
+			data: $this.serialize()
+		}).done(function(data) {
+			var $comment = $this.closest('.comment');
+			$comment.find('.comment-content').html(markdown.render(data.comment));		
+			$comment.toggleClass('is-editing');
+		}).fail(function(xhr) {
+			var error = xhr.responseJSON && xhr.responseJSON.error || 'An unknown error occurred.';
+			$errorStatus.text(error);
+		}).always(function() {
+			$submitButton.removeAttr('disabled');
+			$waitIndicator.hide();
+		});
+	})
 });
 
 function _format_time_difference(seconds) {

nyaa/templates/view.html

@@ -152,18 +152,38 @@
 				</p>
 				<img class="avatar" src="{{ comment.user.gravatar_url() }}" alt="{{ comment.user.userlevel_str }}">
 			</div>
-			<div class="col-md-10">
-				<div class="row">
+			<div class="col-md-10 comment">
+				<div class="row comment-details">
 					<a href="#com-{{ loop.index }}"><small data-timestamp-swap data-timestamp="{{ comment.created_utc_timestamp|int }}">{{ comment.created_time.strftime('%Y-%m-%d %H:%M UTC') }}</small></a>
+					{% if comment.edited_time %}
+					<small title="{{ comment.edited_time }}">(edited)</small>
+					{% endif %}
+					<div class="comment-actions">
+						{% if g.user.id == comment.user_id and not comment.editing_limit_exceeded %}
+						<button class="btn btn-xs edit-comment" title="Edit"{% if config.EDITING_TIME_LIMIT %} data-until="{{ comment.editable_until|int }}"{% endif %}>Edit</button>
+						{% endif %}
 						{% if g.user.is_moderator or g.user.id == comment.user_id %}
 						<form class="delete-comment-form" action="{{ url_for('torrents.delete_comment', torrent_id=torrent.id, comment_id=comment.id) }}" method="POST">
 							<button name="submit" type="submit" class="btn btn-danger btn-xs" title="Delete">Delete</button>
 						</form>
 						{% endif %}
 					</div>
+				</div>
 				<div class="row">
 					{# Escape newlines into html entities because CF strips blank newlines #}
 					<div markdown-text class="comment-content" id="torrent-comment{{ comment.id }}">{{ comment.text }}</div>
+					{% if g.user.id == comment.user_id %}
+					<form class="edit-comment-box" action="{{ url_for('torrents.edit_comment', torrent_id=torrent.id, comment_id=comment.id) }}" method="POST">
+						{{ comment_form.csrf_token }}
+						<div class="form-group">
+							<textarea class="form-control" name="comment" autofocus>{{ comment.text }}</textarea>
+						</div>
+						<input type="submit" value="Submit" class="btn btn-success btn-sm">
+						<button class="btn btn-sm edit-comment" title="Cancel">Cancel</button>
+						<span class="edit-error text-danger"></span>
+						<div class="edit-waiting" style="display:none"></div>
+					</form>
+					{% endif %}
 				</div>
 			</div>
 		</div>

nyaa/views/torrents.py

@@ -330,6 +330,37 @@ def download_torrent(torrent_id):
     return resp
 
 
+@bp.route('/view/<int:torrent_id>/comment/<int:comment_id>/edit', methods=['POST'])
+def edit_comment(torrent_id, comment_id):
+    if not flask.g.user:
+        flask.abort(403)
+    torrent = models.Torrent.by_id(torrent_id)
+    if not torrent:
+        flask.abort(404)
+
+    comment = models.Comment.query.get(comment_id)
+    if not comment:
+        flask.abort(404)
+
+    if not comment.user.id == flask.g.user.id:
+        flask.abort(403)
+
+    if comment.editing_limit_exceeded:
+        flask.abort(flask.make_response(flask.jsonify(
+            {'error': 'Editing time limit exceeded.'}), 400))
+
+    form = forms.CommentForm(flask.request.form)
+
+    if not form.validate():
+        error_str = ' '.join(form.errors['comment'])
+        flask.abort(flask.make_response(flask.jsonify({'error': error_str}), 400))
+
+    comment.text = form.comment.data
+    db.session.commit()
+
+    return flask.jsonify({'comment': comment.text})
+
+
 @bp.route('/view/<int:torrent_id>/comment/<int:comment_id>/delete', methods=['POST'])
 def delete_comment(torrent_id, comment_id):
     if not flask.g.user: