Migrate glitch-soc keyword mutes to Mastodon's

Completely remove glitch-soc's Keyword Mutes, migrate
existing database records to CustomFilters.

Handling of client-side filters is still not implemented
in the glitch-soc front-end.

5 files changed, 0 insertions, 240 deletions

diff --git a/app/controllers/settings/keyword_mutes_controller.rb b/app/controllers/settings/keyword_mutes_controller.rb
deleted file mode 100644
index cf364a903..000000000
--- a/app/controllers/settings/keyword_mutes_controller.rb
+++ /dev/null
@@ -1,61 +0,0 @@
-# frozen_string_literal: true
-
-class Settings::KeywordMutesController < Settings::BaseController
-  before_action :load_keyword_mute, only: [:edit, :update, :destroy]
-
-  def index
-    @keyword_mutes = paginated_keyword_mutes_for_account
-  end
-
-  def new
-    @keyword_mute = keyword_mutes_for_account.build
-  end
-
-  def create
-    @keyword_mute = keyword_mutes_for_account.create(keyword_mute_params)
-
-    if @keyword_mute.persisted?
-      redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
-    else
-      render :new
-    end
-  end
-
-  def update
-    if @keyword_mute.update(keyword_mute_params)
-      redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
-    else
-      render :edit
-    end
-  end
-
-  def destroy
-    @keyword_mute.destroy!
-
-    redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
-  end
-
-  def destroy_all
-    keyword_mutes_for_account.delete_all
-
-    redirect_to settings_keyword_mutes_path, notice: I18n.t('generic.changes_saved_msg')
-  end
-
-  private
-
-  def keyword_mutes_for_account
-    Glitch::KeywordMute.where(account: current_account)
-  end
-
-  def load_keyword_mute
-    @keyword_mute = keyword_mutes_for_account.find(params[:id])
-  end
-
-  def keyword_mute_params
-    params.require(:keyword_mute).permit(:keyword, :whole_word, :apply_to_mentions)
-  end
-
-  def paginated_keyword_mutes_for_account
-    keyword_mutes_for_account.order(:keyword).page params[:page]
-  end
-end
diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index dff3cbb22..c247ab21d 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -153,7 +153,6 @@ 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_from_home?(status, receiver_id)
     return true  if phrase_filtered?(status, receiver_id, :home)
 
     check_for_blocks = status.mentions.pluck(:account_id)
@@ -181,26 +180,6 @@ class FeedManager
     false
   end
 
-  def keyword_filter_from_home?(status, receiver_id)
-    # If this status mentions the receiver, use the mentions scope: it's
-    # possible that the status will show up in the receiver's mentions, which
-    # means it ought to show up in the home feed as well.
-    #
-    # If it doesn't mention the receiver but is still headed for the home feed,
-    # use the home feed scope.
-    scope = if status.mentions.pluck(:account_id).include?(receiver_id)
-              Glitch::KeywordMute::Scopes::Mentions
-            else
-              Glitch::KeywordMute::Scopes::HomeFeed
-            end
-
-    return true if keyword_filter?(status, receiver_id, scope)
-  end
-
-  def keyword_filter?(status, receiver_id, scope)
-    Glitch::KeywordMuteHelper.new(receiver_id).matches?(status, scope)
-  end
-
   def filter_from_mentions?(status, receiver_id)
     return true if receiver_id == status.account_id
     return true if phrase_filtered?(status, receiver_id, :notifications)
@@ -213,7 +192,6 @@ 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, Glitch::KeywordMute::Scopes::Mentions)                                        # or if the mention contains a muted keyword
 
     should_filter
   end
diff --git a/app/models/glitch.rb b/app/models/glitch.rb
deleted file mode 100644
index 0e497babc..000000000
--- a/app/models/glitch.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-# frozen_string_literal: true
-
-module Glitch
-  def self.table_name_prefix
-    'glitch_'
-  end
-end
diff --git a/app/models/glitch/keyword_mute.rb b/app/models/glitch/keyword_mute.rb
deleted file mode 100644
index 49769cb73..000000000
--- a/app/models/glitch/keyword_mute.rb
+++ /dev/null
@@ -1,123 +0,0 @@
-# frozen_string_literal: true
-# == Schema Information
-#
-# Table name: glitch_keyword_mutes
-#
-#  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
-  belongs_to :account, required: true
-
-  validates_presence_of :keyword
-
-  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
-
-  def self.tag_matcher_for(account_id)
-    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
-    Rails.cache.delete(TextMatcher.cache_key(account_id))
-    Rails.cache.delete(TagMatcher.cache_key(account_id))
-  end
-
-  class CachedKeywordMute
-    attr_reader :keyword
-    attr_reader :whole_word
-    attr_reader :scope
-
-    def initialize(keyword, whole_word, scope)
-      @keyword = keyword
-      @whole_word = whole_word
-      @scope = scope
-    end
-
-    def boundary_regex_for_keyword
-      sb = keyword =~ /\A[[:word:]]/ ? '\b' : ''
-      eb = keyword =~ /[[:word:]]\Z/ ? '\b' : ''
-
-      /(?mix:#{sb}#{Regexp.escape(keyword)}#{eb})/
-    end
-
-    def matches?(str, required_scope)
-      ((required_scope & scope) == required_scope) && \
-        str =~ (whole_word ? boundary_regex_for_keyword : /#{Regexp.escape(keyword)}/i)
-    end
-  end
-
-  class Matcher
-    attr_reader :account_id
-    attr_reader :keywords
-
-    def initialize(account_id)
-      @account_id = account_id
-      @keywords = Rails.cache.fetch(self.class.cache_key(account_id)) { fetch_keywords }
-    end
-
-    protected
-
-    def fetch_keywords
-      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)
-      keyword
-    end
-  end
-
-  class TextMatcher < Matcher
-    def self.cache_key(account_id)
-      format('keyword_mutes:regex:text:%s', account_id)
-    end
-
-    def matches?(str, scope)
-      keywords.any? { |kw| kw.matches?(str, scope) }
-    end
-  end
-
-  class TagMatcher < Matcher
-    def self.cache_key(account_id)
-      format('keyword_mutes:regex:tag:%s', account_id)
-    end
-
-    def matches?(tags, scope)
-      tags.pluck(:name).any? do |n|
-        keywords.any? { |kw| kw.matches?(n, scope) }
-      end
-    end
-
-    protected
-
-    def transform_keyword(kw)
-      Tag::HASHTAG_RE =~ kw ? $1 : kw
-    end
-  end
-end
diff --git a/app/models/glitch/keyword_mute_helper.rb b/app/models/glitch/keyword_mute_helper.rb
deleted file mode 100644
index 955c3b1f3..000000000
--- a/app/models/glitch/keyword_mute_helper.rb
+++ /dev/null
@@ -1,27 +0,0 @@
-require 'html2text'
-
-class Glitch::KeywordMuteHelper
-  attr_reader :text_matcher
-  attr_reader :tag_matcher
-
-  def initialize(receiver_id)
-    @text_matcher   = Glitch::KeywordMute.text_matcher_for(receiver_id)
-    @tag_matcher    = Glitch::KeywordMute.tag_matcher_for(receiver_id)
-  end
-
-  def matches?(status, scope)
-    matchers_match?(status, scope) || (status.reblog? && matchers_match?(status.reblog, scope))
-  end
-
-  private
-
-  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)
-    Html2Text.convert(text)
-  end
-end