Thread scopes through #matches?. #454.

Also add an apply_to_mentions attribute on Glitch::KeywordMute, which is
used to calculate scope.  Next up: additions to the test suite to
demonstrate how scoping works.

8 files changed, 99 insertions, 61 deletions

diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index 3a2dcac68..74794f00c 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -153,7 +153,7 @@ class FeedManager
   def filter_from_home?(status, receiver_id)
     return false if receiver_id == status.account_id
     return true  if status.reply? && (status.in_reply_to_id.nil? || status.in_reply_to_account_id.nil?)
-    return true if keyword_filter?(status, receiver_id)
+    return true if keyword_filter?(status, receiver_id, Glitch::KeywordMute::Scopes::HomeFeed)
 
     check_for_mutes = [status.account_id]
     check_for_mutes.concat(status.mentions.pluck(:account_id))
@@ -182,8 +182,8 @@ class FeedManager
     false
   end
 
-  def keyword_filter?(status, receiver_id)
-    Glitch::KeywordMuteHelper.new(receiver_id).matches?(status)
+  def keyword_filter?(status, receiver_id, scope)
+    Glitch::KeywordMuteHelper.new(receiver_id).matches?(status, scope)
   end
 
   def filter_from_mentions?(status, receiver_id)
@@ -197,7 +197,7 @@ class FeedManager
 
     should_filter   = blocks_or_mutes?(receiver_id, check_for_blocks, :mentions)                                                         # Filter if it's from someone I blocked, in reply to someone I blocked, or mentioning someone I blocked (or muted)
     should_filter ||= (status.account.silenced? && !Follow.where(account_id: receiver_id, target_account_id: status.account_id).exists?) # of if the account is silenced and I'm not following them
-    should_filter ||= keyword_filter?(status, receiver_id)                                                                               # or if the mention contains a muted keyword
+    should_filter ||= keyword_filter?(status, receiver_id, Glitch::KeywordMute::Scopes::Mentions)                                        # or if the mention contains a muted keyword
 
     should_filter
   end
diff --git a/app/models/bookmark.rb b/app/models/bookmark.rb
index 01dc48ee7..916261a17 100644
--- a/app/models/bookmark.rb
+++ b/app/models/bookmark.rb
@@ -3,11 +3,11 @@
 #
 # Table name: bookmarks
 #
-#  id         :integer          not null, primary key
+#  id         :bigint(8)        not null, primary key
+#  account_id :bigint(8)        not null
+#  status_id  :bigint(8)        not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  account_id :integer          not null
-#  status_id  :integer          not null
 #
 
 class Bookmark < ApplicationRecord
diff --git a/app/models/glitch/keyword_mute.rb b/app/models/glitch/keyword_mute.rb
index e7cbbe617..11b7958f6 100644
--- a/app/models/glitch/keyword_mute.rb
+++ b/app/models/glitch/keyword_mute.rb
@@ -3,12 +3,13 @@
 #
 # Table name: glitch_keyword_mutes
 #
-#  id         :integer          not null, primary key
-#  account_id :integer          not null
-#  keyword    :string           not null
-#  whole_word :boolean          default(TRUE), not null
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
+#  id                :bigint(8)        not null, primary key
+#  account_id        :bigint(8)        not null
+#  keyword           :string           not null
+#  whole_word        :boolean          default(TRUE), not null
+#  created_at        :datetime         not null
+#  updated_at        :datetime         not null
+#  apply_to_mentions :boolean          default(TRUE), not null
 #
 
 class Glitch::KeywordMute < ApplicationRecord
@@ -18,6 +19,12 @@ class Glitch::KeywordMute < ApplicationRecord
 
   after_commit :invalidate_cached_matchers
 
+  module Scopes
+    Unscoped = 0b00
+    HomeFeed = 0b01
+    Mentions = 0b10
+  end
+
   def self.text_matcher_for(account_id)
     TextMatcher.new(account_id)
   end
@@ -26,6 +33,13 @@ class Glitch::KeywordMute < ApplicationRecord
     TagMatcher.new(account_id)
   end
 
+  def scope
+    s = Scopes::Unscoped
+    s |= Scopes::HomeFeed
+    s |= Scopes::Mentions if apply_to_mentions?
+    s
+  end
+
   private
 
   def invalidate_cached_matchers
@@ -36,10 +50,12 @@ class Glitch::KeywordMute < ApplicationRecord
   class CachedKeywordMute
     attr_reader :keyword
     attr_reader :whole_word
+    attr_reader :scope
 
-    def initialize(keyword, whole_word)
+    def initialize(keyword, whole_word, scope)
       @keyword = keyword
       @whole_word = whole_word
+      @scope = scope
     end
 
     def boundary_regex_for_keyword
@@ -49,26 +65,27 @@ class Glitch::KeywordMute < ApplicationRecord
       /(?mix:#{sb}#{Regexp.escape(keyword)}#{eb})/
     end
 
-    def matches?(str)
-      str =~ (whole_word ? boundary_regex_for_keyword : /#{keyword}/i)
+    def matches?(str, required_scope)
+      ((required_scope & scope) == required_scope) && \
+        str =~ (whole_word ? boundary_regex_for_keyword : /#{keyword}/i)
     end
   end
 
   class Matcher
     attr_reader :account_id
-    attr_reader :words
+    attr_reader :keywords
 
     def initialize(account_id)
       @account_id = account_id
-      @words = Rails.cache.fetch(self.class.cache_key(account_id)) { fetch_keywords }
+      @keywords = Rails.cache.fetch(self.class.cache_key(account_id)) { fetch_keywords }
     end
 
     protected
 
     def fetch_keywords
-      Glitch::KeywordMute.where(account_id: account_id).pluck(:whole_word, :keyword).map do |whole_word, keyword|
-        CachedKeywordMute.new(transform_keyword(keyword), whole_word)
-      end
+      Glitch::KeywordMute.select(:whole_word, :keyword, :apply_to_mentions)
+        .where(account_id: account_id)
+        .map { |kw| CachedKeywordMute.new(transform_keyword(kw.keyword), kw.whole_word, kw.scope) }
     end
 
     def transform_keyword(keyword)
@@ -81,8 +98,8 @@ class Glitch::KeywordMute < ApplicationRecord
       format('keyword_mutes:regex:text:%s', account_id)
     end
 
-    def matches?(str)
-      words.any? { |w| w.matches?(str) }
+    def matches?(str, scope)
+      keywords.any? { |kw| kw.matches?(str, scope) }
     end
   end
 
@@ -91,9 +108,9 @@ class Glitch::KeywordMute < ApplicationRecord
       format('keyword_mutes:regex:tag:%s', account_id)
     end
 
-    def matches?(tags)
+    def matches?(tags, scope)
       tags.pluck(:name).any? do |n|
-        words.any? { |w| w.matches?(n) }
+        keywords.any? { |kw| kw.matches?(n, scope) }
       end
     end
 
diff --git a/app/models/glitch/keyword_mute_helper.rb b/app/models/glitch/keyword_mute_helper.rb
index 6d067947f..955c3b1f3 100644
--- a/app/models/glitch/keyword_mute_helper.rb
+++ b/app/models/glitch/keyword_mute_helper.rb
@@ -9,16 +9,16 @@ class Glitch::KeywordMuteHelper
     @tag_matcher    = Glitch::KeywordMute.tag_matcher_for(receiver_id)
   end
 
-  def matches?(status)
-    matchers_match?(status) || (status.reblog? && matchers_match?(status.reblog))
+  def matches?(status, scope)
+    matchers_match?(status, scope) || (status.reblog? && matchers_match?(status.reblog, scope))
   end
 
   private
 
-  def matchers_match?(status)
-    text_matcher.matches?(prepare_text(status.text)) ||
-      text_matcher.matches?(prepare_text(status.spoiler_text)) ||
-      tag_matcher.matches?(status.tags)
+  def matchers_match?(status, scope)
+    text_matcher.matches?(prepare_text(status.text), scope) ||
+      text_matcher.matches?(prepare_text(status.spoiler_text), scope) ||
+      tag_matcher.matches?(status.tags, scope)
   end
 
   def prepare_text(text)
diff --git a/db/migrate/20180604000556_add_apply_to_mentions_flag_to_keyword_mutes.rb b/db/migrate/20180604000556_add_apply_to_mentions_flag_to_keyword_mutes.rb
new file mode 100644
index 000000000..cd97d0f20
--- /dev/null
+++ b/db/migrate/20180604000556_add_apply_to_mentions_flag_to_keyword_mutes.rb
@@ -0,0 +1,17 @@
+require 'mastodon/migration_helpers'
+
+class AddApplyToMentionsFlagToKeywordMutes < ActiveRecord::Migration[5.2]
+  include Mastodon::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def up
+    safety_assured do
+      add_column_with_default :glitch_keyword_mutes, :apply_to_mentions, :boolean, allow_null: false, default: true
+    end
+  end
+
+  def down
+    remove_column :glitch_keyword_mutes, :apply_to_mentions
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 796924123..4f2c00099 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_05_28_141303) do
+ActiveRecord::Schema.define(version: 2018_06_04_000556) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -206,6 +206,7 @@ ActiveRecord::Schema.define(version: 2018_05_28_141303) do
     t.boolean "whole_word", default: true, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.boolean "apply_to_mentions", default: true, null: false
     t.index ["account_id"], name: "index_glitch_keyword_mutes_on_account_id"
   end
 
@@ -466,7 +467,6 @@ ActiveRecord::Schema.define(version: 2018_05_28_141303) do
     t.bigint "application_id"
     t.bigint "in_reply_to_account_id"
     t.boolean "local_only"
-    t.text "full_status_text", default: "", null: false
     t.index ["account_id", "id", "visibility", "updated_at"], name: "index_statuses_20180106", order: { id: :desc }
     t.index ["conversation_id"], name: "index_statuses_on_conversation_id"
     t.index ["in_reply_to_id"], name: "index_statuses_on_in_reply_to_id"
diff --git a/spec/models/glitch/keyword_mute_helper_spec.rb b/spec/models/glitch/keyword_mute_helper_spec.rb
index b3f991d5b..f9408d62d 100644
--- a/spec/models/glitch/keyword_mute_helper_spec.rb
+++ b/spec/models/glitch/keyword_mute_helper_spec.rb
@@ -2,6 +2,8 @@ require 'rails_helper'
 
 RSpec.describe Glitch::KeywordMuteHelper do
   describe '#matches?' do
+    Unscoped = Glitch::KeywordMute::Scopes::Unscoped
+
     let(:alice) { Fabricate(:account, username: 'alice').tap(&:save!) }
     let(:helper) { Glitch::KeywordMuteHelper.new(alice) }
 
@@ -9,42 +11,42 @@ RSpec.describe Glitch::KeywordMuteHelper do
       status = Fabricate(:status, text: '<addr>uh example</addr>')
       Glitch::KeywordMute.create!(account: alice, keyword: 'addr')
 
-      expect(helper.matches?(status)).to be false
+      expect(helper.matches?(status, Unscoped)).to be false
     end
 
     it 'ignores properties of HTML tags in status text' do
       status = Fabricate(:status, text: '<a href="https://www.example.org">uh example</a>')
       Glitch::KeywordMute.create!(account: alice, keyword: 'href')
 
-      expect(helper.matches?(status)).to be false
+      expect(helper.matches?(status, Unscoped)).to be false
     end
 
     it 'matches text inside HTML tags' do
       status = Fabricate(:status, text: '<p>HEY THIS IS SOMETHING ANNOYING</p>')
       Glitch::KeywordMute.create!(account: alice, keyword: 'annoying')
 
-      expect(helper.matches?(status)).to be true
+      expect(helper.matches?(status, Unscoped)).to be true
     end
 
     it 'matches < in HTML-stripped text' do
       status = Fabricate(:status, text: '<p>I <3 oats</p>')
       Glitch::KeywordMute.create!(account: alice, keyword: '<3')
 
-      expect(helper.matches?(status)).to be true
+      expect(helper.matches?(status, Unscoped)).to be true
     end
 
     it 'matches &lt; in HTML text' do
       status = Fabricate(:status, text: '<p>I &lt;3 oats</p>')
       Glitch::KeywordMute.create!(account: alice, keyword: '<3')
 
-      expect(helper.matches?(status)).to be true
+      expect(helper.matches?(status, Unscoped)).to be true
     end
 
     it 'matches link hrefs in HTML text' do
       status = Fabricate(:status, text: '<p><a href="https://example.com/it-was-milk">yep</a></p>')
       Glitch::KeywordMute.create!(account: alice, keyword: 'milk')
 
-      expect(helper.matches?(status)).to be true
+      expect(helper.matches?(status, Unscoped)).to be true
     end
   end
 end
diff --git a/spec/models/glitch/keyword_mute_spec.rb b/spec/models/glitch/keyword_mute_spec.rb
index 79225e3b9..de1376e4c 100644
--- a/spec/models/glitch/keyword_mute_spec.rb
+++ b/spec/models/glitch/keyword_mute_spec.rb
@@ -4,6 +4,8 @@ RSpec.describe Glitch::KeywordMute, type: :model do
   let(:alice) { Fabricate(:account, username: 'alice').tap(&:save!) }
   let(:bob) { Fabricate(:account, username: 'bob').tap(&:save!) }
 
+  Unscoped = Glitch::KeywordMute::Scopes::Unscoped
+
   describe '.text_matcher_for' do
     let(:matcher) { Glitch::KeywordMute.text_matcher_for(alice.id) }
 
@@ -13,7 +15,7 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       end
 
       it 'does not match' do
-        expect(matcher.matches?('This is a hot take')).to be_falsy
+        expect(matcher.matches?('This is a hot take', Unscoped)).to be_falsy
       end
     end
 
@@ -21,81 +23,81 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       it 'does not match keywords set by a different account' do
         Glitch::KeywordMute.create!(account: bob, keyword: 'take')
 
-        expect(matcher.matches?('This is a hot take')).to be_falsy
+        expect(matcher.matches?('This is a hot take', Unscoped)).to be_falsy
       end
 
       it 'does not match if no keywords match the status text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'cold')
 
-        expect(matcher.matches?('This is a hot take')).to be_falsy
+        expect(matcher.matches?('This is a hot take', Unscoped)).to be_falsy
       end
 
       it 'considers word boundaries when matching' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'bob', whole_word: true)
 
-        expect(matcher.matches?('bobcats')).to be_falsy
+        expect(matcher.matches?('bobcats', Unscoped)).to be_falsy
       end
 
       it 'matches substrings if whole_word is false' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take', whole_word: false)
 
-        expect(matcher.matches?('This is a shiitake mushroom')).to be_truthy
+        expect(matcher.matches?('This is a shiitake mushroom', Unscoped)).to be_truthy
       end
 
       it 'matches keywords at the beginning of the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take')
 
-        expect(matcher.matches?('Take this')).to be_truthy
+        expect(matcher.matches?('Take this', Unscoped)).to be_truthy
       end
 
       it 'matches keywords at the end of the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'take')
 
-        expect(matcher.matches?('This is a hot take')).to be_truthy
+        expect(matcher.matches?('This is a hot take', Unscoped)).to be_truthy
       end
 
       it 'matches if at least one keyword case-insensitively matches the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
 
-        expect(matcher.matches?('This is a HOT take')).to be_truthy
+        expect(matcher.matches?('This is a HOT take', Unscoped)).to be_truthy
       end
 
       it 'matches if at least one non-whole-word keyword case-insensitively matches the text' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot', whole_word: false)
 
-        expect(matcher.matches?('This is a HOTTY take')).to be_truthy
+        expect(matcher.matches?('This is a HOTTY take', Unscoped)).to be_truthy
       end
 
       it 'maintains case-insensitivity when combining keywords into a single matcher' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
         Glitch::KeywordMute.create!(account: alice, keyword: 'cold')
 
-        expect(matcher.matches?('This is a HOT take')).to be_truthy
+        expect(matcher.matches?('This is a HOT take', Unscoped)).to be_truthy
       end
 
       it 'matches keywords surrounded by non-alphanumeric ornamentation' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'hot')
 
-        expect(matcher.matches?('(hot take)')).to be_truthy
+        expect(matcher.matches?('(hot take)', Unscoped)).to be_truthy
       end
 
       it 'escapes metacharacters in keywords' do
         Glitch::KeywordMute.create!(account: alice, keyword: '(hot take)')
 
-        expect(matcher.matches?('(hot take)')).to be_truthy
+        expect(matcher.matches?('(hot take)', Unscoped)).to be_truthy
       end
 
       it 'uses case-folding rules appropriate for more than just English' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'großeltern')
 
-        expect(matcher.matches?('besuch der grosseltern')).to be_truthy
+        expect(matcher.matches?('besuch der grosseltern', Unscoped)).to be_truthy
       end
 
       it 'matches keywords that are composed of multiple words' do
         Glitch::KeywordMute.create!(account: alice, keyword: 'a shiitake')
 
-        expect(matcher.matches?('This is a shiitake')).to be_truthy
-        expect(matcher.matches?('This is shiitake')).to_not be_truthy
+        expect(matcher.matches?('This is a shiitake', Unscoped)).to be_truthy
+        expect(matcher.matches?('This is shiitake', Unscoped)).to_not be_truthy
       end
     end
   end
@@ -112,7 +114,7 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       it 'does not match' do
         status.tags << Fabricate(:tag, name: 'xyzzy')
 
-        expect(matcher.matches?(status.tags)).to be false
+        expect(matcher.matches?(status.tags, Unscoped)).to be false
       end
     end
 
@@ -121,42 +123,42 @@ RSpec.describe Glitch::KeywordMute, type: :model do
         status.tags << Fabricate(:tag, name: 'xyzzy')
         Glitch::KeywordMute.create!(account: bob, keyword: 'take')
 
-        expect(matcher.matches?(status.tags)).to be false
+        expect(matcher.matches?(status.tags, Unscoped)).to be false
       end
 
       it 'matches #xyzzy when given the mute "#xyzzy"' do
         status.tags << Fabricate(:tag, name: 'xyzzy')
         Glitch::KeywordMute.create!(account: alice, keyword: '#xyzzy')
 
-        expect(matcher.matches?(status.tags)).to be true
+        expect(matcher.matches?(status.tags, Unscoped)).to be true
       end
 
       it 'matches #thingiverse when given the non-whole-word mute "#thing"' do
         status.tags << Fabricate(:tag, name: 'thingiverse')
         Glitch::KeywordMute.create!(account: alice, keyword: '#thing', whole_word: false)
 
-        expect(matcher.matches?(status.tags)).to be true
+        expect(matcher.matches?(status.tags, Unscoped)).to be true
       end
 
       it 'matches #hashtag when given the mute "##hashtag""' do
         status.tags << Fabricate(:tag, name: 'hashtag')
         Glitch::KeywordMute.create!(account: alice, keyword: '##hashtag')
 
-        expect(matcher.matches?(status.tags)).to be true
+        expect(matcher.matches?(status.tags, Unscoped)).to be true
       end
 
       it 'matches #oatmeal when given the non-whole-word mute "oat"' do
         status.tags << Fabricate(:tag, name: 'oatmeal')
         Glitch::KeywordMute.create!(account: alice, keyword: 'oat', whole_word: false)
 
-        expect(matcher.matches?(status.tags)).to be true
+        expect(matcher.matches?(status.tags, Unscoped)).to be true
       end
 
       it 'does not match #oatmeal when given the mute "#oat"' do
         status.tags << Fabricate(:tag, name: 'oatmeal')
         Glitch::KeywordMute.create!(account: alice, keyword: 'oat')
 
-        expect(matcher.matches?(status.tags)).to be false
+        expect(matcher.matches?(status.tags, Unscoped)).to be false
       end
     end
   end