From 74ae158c2f7b7d282ce1cc754ac83d27467a7215 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Wed, 15 Mar 2017 22:52:57 +0100
Subject: [PATCH] Add "direct" visibility level in the backend. Web UI is not
 yet adjusted to allow choosing it, yet

---
 .../components/status_action_bar.jsx          |  2 +-
 .../features/status/components/action_bar.jsx |  2 +-
 app/lib/feed_manager.rb                       |  1 +
 app/models/status.rb                          | 27 +++++++++++--------
 app/services/fan_out_on_write_service.rb      | 13 ++++++++-
 app/services/reblog_service.rb                |  2 +-
 6 files changed, 32 insertions(+), 15 deletions(-)

diff --git a/app/assets/javascripts/components/components/status_action_bar.jsx b/app/assets/javascripts/components/components/status_action_bar.jsx
index 469506f2fed..234cd396afa 100644
--- a/app/assets/javascripts/components/components/status_action_bar.jsx
+++ b/app/assets/javascripts/components/components/status_action_bar.jsx
@@ -88,7 +88,7 @@ const StatusActionBar = React.createClass({
     return (
       <div style={{ marginTop: '10px', overflow: 'hidden' }}>
         <div style={{ float: 'left', marginRight: '18px'}}><IconButton title={intl.formatMessage(messages.reply)} icon='reply' onClick={this.handleReplyClick} /></div>
-        <div style={{ float: 'left', marginRight: '18px'}}><IconButton disabled={status.get('visibility') === 'private'} active={status.get('reblogged')} title={intl.formatMessage(messages.reblog)} icon={status.get('visibility') === 'private' ? 'lock' : 'retweet'} onClick={this.handleReblogClick} /></div>
+        <div style={{ float: 'left', marginRight: '18px'}}><IconButton disabled={status.get('visibility') === 'private' || status.get('visibility') === 'direct'} active={status.get('reblogged')} title={intl.formatMessage(messages.reblog)} icon={status.get('visibility') === 'direct' ? 'envelope' : (status.get('visibility') === 'private' ? 'lock' : 'retweet')} onClick={this.handleReblogClick} /></div>
         <div style={{ float: 'left', marginRight: '18px'}}><IconButton animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
 
         <div style={{ width: '18px', height: '18px', float: 'left' }}>
diff --git a/app/assets/javascripts/components/features/status/components/action_bar.jsx b/app/assets/javascripts/components/features/status/components/action_bar.jsx
index 2acf9427432..2aebcd7098f 100644
--- a/app/assets/javascripts/components/features/status/components/action_bar.jsx
+++ b/app/assets/javascripts/components/features/status/components/action_bar.jsx
@@ -74,7 +74,7 @@ const ActionBar = React.createClass({
     return (
       <div className='detailed-status__action-bar'>
         <div style={{ flex: '1 1 auto', textAlign: 'center' }}><IconButton title={intl.formatMessage(messages.reply)} icon='reply' onClick={this.handleReplyClick} /></div>
-        <div style={{ flex: '1 1 auto', textAlign: 'center' }}><IconButton disabled={status.get('visibility') === 'private'} active={status.get('reblogged')} title={intl.formatMessage(messages.reblog)} icon={status.get('visibility') === 'private' ? 'lock' : 'retweet'} onClick={this.handleReblogClick} /></div>
+        <div style={{ flex: '1 1 auto', textAlign: 'center' }}><IconButton disabled={status.get('visibility') === 'direct' || status.get('visibility') === 'private'} active={status.get('reblogged')} title={intl.formatMessage(messages.reblog)} icon={status.get('visibility') === 'direct' ? 'envelope' : (status.get('visibility') === 'private' ? 'lock' : 'retweet')} onClick={this.handleReblogClick} /></div>
         <div style={{ flex: '1 1 auto', textAlign: 'center' }}><IconButton animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
         <div style={{ flex: '1 1 auto', textAlign: 'center' }}><DropdownMenu size={18} icon='ellipsis-h' items={menu} direction="left" /></div>
       </div>
diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index 3a26c5c056f..b0dda125648 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -108,6 +108,7 @@ class FeedManager
     elsif status.reblog?                                                      # Filter out a reblog
       should_filter = receiver.blocking?(status.reblog.account)               # if I'm blocking the reblogged person
       should_filter ||= receiver.muting?(status.reblog.account)               # or muting that person
+      should_filter ||= status.reblog.account.blocking?(receiver)             # or if the author of the reblogged status is blocking me
     end
 
     should_filter ||= receiver.blocking?(status.mentions.map(&:account_id))   # or if it mentions someone I blocked
diff --git a/app/models/status.rb b/app/models/status.rb
index 663ac1e34d4..d5bbf70fb66 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -6,7 +6,7 @@ class Status < ApplicationRecord
   include Streamable
   include Cacheable
 
-  enum visibility: [:public, :unlisted, :private], _suffix: :visibility
+  enum visibility: [:public, :unlisted, :private, :direct], _suffix: :visibility
 
   belongs_to :application, class_name: 'Doorkeeper::Application'
 
@@ -75,12 +75,14 @@ class Status < ApplicationRecord
   end
 
   def hidden?
-    private_visibility?
+    private_visibility? || direct_visibility?
   end
 
   def permitted?(other_account = nil)
-    if private_visibility?
-      (account.id == other_account&.id || other_account&.following?(account) || mentions.where(account: other_account).exists?)
+    if direct_visibility?
+      account.id == other_account&.id || mentions.where(account: other_account).exists?
+    elsif private_visibility?
+      account.id == other_account&.id || other_account&.following?(account) || mentions.where(account: other_account).exists?
     else
       other_account.nil? || !account.blocking?(other_account)
     end
@@ -156,15 +158,18 @@ class Status < ApplicationRecord
     end
 
     def permitted_for(target_account, account)
-      if account&.id == target_account.id || account&.following?(target_account)
-        where('1 = 1')
-      elsif !account.nil? && target_account.blocking?(account)
+      return where.not(visibility: [:private, :direct]) if account.nil?
+
+      if target_account.blocking?(account) # get rid of blocked peeps
         where('1 = 0')
-      elsif !account.nil?
+      elsif account.id == target_account.id # author can see own stuff
+        where('1 = 1')
+      elsif account.following?(target_account) # followers can see followers-only stuff, but also things they are mentioned in
         joins('LEFT OUTER JOIN mentions ON statuses.id = mentions.status_id AND mentions.account_id = ' + account.id.to_s)
-          .where('statuses.visibility != ? OR mentions.id IS NOT NULL', Status.visibilities[:private])
-      else
-        where.not(visibility: :private)
+          .where('statuses.visibility != ? OR mentions.id IS NOT NULL', Status.visibilities[:direct])
+      else # non-followers can see everything that isn't private/direct, but can see stuff they are mentioned in
+        joins('LEFT OUTER JOIN mentions ON statuses.id = mentions.status_id AND mentions.account_id = ' + account.id.to_s)
+          .where('statuses.visibility NOT IN (?) OR mentions.id IS NOT NULL', [Status.visibilities[:direct], Status.visibilities[:private]])
       end
     end
 
diff --git a/app/services/fan_out_on_write_service.rb b/app/services/fan_out_on_write_service.rb
index 71f6cbca1ca..0cacfd7cd38 100644
--- a/app/services/fan_out_on_write_service.rb
+++ b/app/services/fan_out_on_write_service.rb
@@ -5,7 +5,8 @@ class FanOutOnWriteService < BaseService
   # @param [Status] status
   def call(status)
     deliver_to_self(status) if status.account.local?
-    deliver_to_followers(status)
+
+    status.direct_visibility? ? deliver_to_mentioned_followers(status) : deliver_to_followers(status)
 
     return if status.account.silenced? || !status.public_visibility? || status.reblog?
 
@@ -32,6 +33,16 @@ class FanOutOnWriteService < BaseService
     end
   end
 
+  def deliver_to_mentioned_followers(status)
+    Rails.logger.debug "Delivering status #{status.id} to mentioned followers"
+
+    status.mentions.includes(:account).each do |mention|
+      mentioned_account = mention.account
+      next if !mentioned_account.local? || !mentioned_account.following?(status.account) || FeedManager.instance.filter?(:home, status, mentioned_account)
+      FeedManager.instance.push(:home, mentioned_account, status)
+    end
+  end
+
   def deliver_to_hashtags(status)
     Rails.logger.debug "Delivering status #{status.id} to hashtags"
 
diff --git a/app/services/reblog_service.rb b/app/services/reblog_service.rb
index c14b2925ac5..11446ce28b6 100644
--- a/app/services/reblog_service.rb
+++ b/app/services/reblog_service.rb
@@ -10,7 +10,7 @@ class ReblogService < BaseService
   def call(account, reblogged_status)
     reblogged_status = reblogged_status.reblog if reblogged_status.reblog?
 
-    raise Mastodon::NotPermittedError if reblogged_status.private_visibility? || !reblogged_status.permitted?(account)
+    raise Mastodon::NotPermittedError if reblogged_status.direct_visibility? || reblogged_status.private_visibility? || !reblogged_status.permitted?(account)
 
     reblog = account.statuses.create!(reblog: reblogged_status, text: '')