Add scheduled statuses (#9706)

Fix #340

2 files changed, 127 insertions, 43 deletions

diff --git a/app/services/post_status_service.rb b/app/services/post_status_service.rb
index eff1b1461..07fd969e5 100644
--- a/app/services/post_status_service.rb
+++ b/app/services/post_status_service.rb
@@ -1,71 +1,96 @@
 # frozen_string_literal: true
 
 class PostStatusService < BaseService
+  MIN_SCHEDULE_OFFSET = 5.minutes.freeze
+
   # Post a text status update, fetch and notify remote users mentioned
   # @param [Account] account Account from which to post
-  # @param [String] text Message
-  # @param [Status] in_reply_to Optional status to reply to
   # @param [Hash] options
+  # @option [String] :text Message
+  # @option [Status] :thread Optional status to reply to
   # @option [Boolean] :sensitive
   # @option [String] :visibility
   # @option [String] :spoiler_text
+  # @option [String] :language
+  # @option [String] :scheduled_at
   # @option [Enumerable] :media_ids Optional array of media IDs to attach
   # @option [Doorkeeper::Application] :application
   # @option [String] :idempotency Optional idempotency key
   # @return [Status]
-  def call(account, text, in_reply_to = nil, **options)
-    if options[:idempotency].present?
-      existing_id = redis.get("idempotency:status:#{account.id}:#{options[:idempotency]}")
-      return Status.find(existing_id) if existing_id
+  def call(account, options = {})
+    @account     = account
+    @options     = options
+    @text        = @options[:text] || ''
+    @in_reply_to = @options[:thread]
+
+    return idempotency_duplicate if idempotency_given? && idempotency_duplicate?
+
+    validate_media!
+    preprocess_attributes!
+
+    if scheduled?
+      schedule_status!
+    else
+      process_status!
+      postprocess_status!
+      bump_potential_friendship!
     end
 
-    media  = validate_media!(options[:media_ids])
-    status = nil
-    text   = options.delete(:spoiler_text) if text.blank? && options[:spoiler_text].present?
+    redis.setex(idempotency_key, 3_600, @status.id) if idempotency_given?
 
-    visibility = options[:visibility] || account.user&.setting_default_privacy
-    visibility = :unlisted if visibility == :public && account.silenced
+    @status
+  end
 
-    ApplicationRecord.transaction do
-      status = account.statuses.create!(text: text,
-                                        media_attachments: media || [],
-                                        thread: in_reply_to,
-                                        sensitive: (options[:sensitive].nil? ? account.user&.setting_default_sensitive : options[:sensitive]) || options[:spoiler_text].present?,
-                                        spoiler_text: options[:spoiler_text] || '',
-                                        visibility: visibility,
-                                        language: language_from_option(options[:language]) || account.user&.setting_default_language&.presence || LanguageDetector.instance.detect(text, account),
-                                        application: options[:application])
-    end
+  private
 
-    process_hashtags_service.call(status)
-    process_mentions_service.call(status)
+  def preprocess_attributes!
+    @text         = @options.delete(:spoiler_text) if @text.blank? && @options[:spoiler_text].present?
+    @visibility   = @options[:visibility] || @account.user&.setting_default_privacy
+    @visibility   = :unlisted if @visibility == :public && @account.silenced
+    @scheduled_at = @options[:scheduled_at]&.to_datetime
+    @scheduled_at = nil if scheduled_in_the_past?
+  end
 
-    LinkCrawlWorker.perform_async(status.id) unless status.spoiler_text?
-    DistributionWorker.perform_async(status.id)
-    Pubsubhubbub::DistributionWorker.perform_async(status.stream_entry.id)
-    ActivityPub::DistributionWorker.perform_async(status.id)
+  def process_status!
+    # The following transaction block is needed to wrap the UPDATEs to
+    # the media attachments when the status is created
 
-    if options[:idempotency].present?
-      redis.setex("idempotency:status:#{account.id}:#{options[:idempotency]}", 3_600, status.id)
+    ApplicationRecord.transaction do
+      @status = @account.statuses.create!(status_attributes)
     end
 
-    bump_potential_friendship(account, status)
-
-    status
+    process_hashtags_service.call(@status)
+    process_mentions_service.call(@status)
   end
 
-  private
+  def schedule_status!
+    if @account.statuses.build(status_attributes).valid?
+      # The following transaction block is needed to wrap the UPDATEs to
+      # the media attachments when the scheduled status is created
 
-  def validate_media!(media_ids)
-    return if media_ids.blank? || !media_ids.is_a?(Enumerable)
+      ApplicationRecord.transaction do
+        @status = @account.scheduled_statuses.create!(scheduled_status_attributes)
+      end
+    else
+      raise ActiveRecord::RecordInvalid
+    end
+  end
+
+  def postprocess_status!
+    LinkCrawlWorker.perform_async(@status.id) unless @status.spoiler_text?
+    DistributionWorker.perform_async(@status.id)
+    Pubsubhubbub::DistributionWorker.perform_async(@status.stream_entry.id)
+    ActivityPub::DistributionWorker.perform_async(@status.id)
+  end
 
-    raise Mastodon::ValidationError, I18n.t('media_attachments.validations.too_many') if media_ids.size > 4
+  def validate_media!
+    return if @options[:media_ids].blank? || !@options[:media_ids].is_a?(Enumerable)
 
-    media = MediaAttachment.where(status_id: nil).where(id: media_ids.take(4).map(&:to_i))
+    raise Mastodon::ValidationError, I18n.t('media_attachments.validations.too_many') if @options[:media_ids].size > 4
 
-    raise Mastodon::ValidationError, I18n.t('media_attachments.validations.images_and_video') if media.size > 1 && media.find(&:video?)
+    @media = MediaAttachment.where(status_id: nil).where(id: @options[:media_ids].take(4).map(&:to_i))
 
-    media
+    raise Mastodon::ValidationError, I18n.t('media_attachments.validations.images_and_video') if @media.size > 1 && @media.find(&:video?)
   end
 
   def language_from_option(str)
@@ -84,10 +109,68 @@ class PostStatusService < BaseService
     Redis.current
   end
 
-  def bump_potential_friendship(account, status)
-    return if !status.reply? || account.id == status.in_reply_to_account_id
+  def scheduled?
+    @scheduled_at.present?
+  end
+
+  def idempotency_key
+    "idempotency:status:#{@account.id}:#{@options[:idempotency]}"
+  end
+
+  def idempotency_given?
+    @options[:idempotency].present?
+  end
+
+  def idempotency_duplicate
+    if scheduled?
+      @account.schedule_statuses.find(@idempotency_duplicate)
+    else
+      @account.statuses.find(@idempotency_duplicate)
+    end
+  end
+
+  def idempotency_duplicate?
+    @idempotency_duplicate = redis.get(idempotency_key)
+  end
+
+  def scheduled_in_the_past?
+    @scheduled_at.present? && @scheduled_at <= Time.now.utc + MIN_SCHEDULE_OFFSET
+  end
+
+  def bump_potential_friendship!
+    return if !@status.reply? || @account.id == @status.in_reply_to_account_id
     ActivityTracker.increment('activity:interactions')
-    return if account.following?(status.in_reply_to_account_id)
-    PotentialFriendshipTracker.record(account.id, status.in_reply_to_account_id, :reply)
+    return if @account.following?(@status.in_reply_to_account_id)
+    PotentialFriendshipTracker.record(@account.id, @status.in_reply_to_account_id, :reply)
+  end
+
+  def status_attributes
+    {
+      text: @text,
+      media_attachments: @media || [],
+      thread: @in_reply_to,
+      sensitive: (@options[:sensitive].nil? ? @account.user&.setting_default_sensitive : @options[:sensitive]) || @options[:spoiler_text].present?,
+      spoiler_text: @options[:spoiler_text] || '',
+      visibility: @visibility,
+      language: language_from_option(@options[:language]) || @account.user&.setting_default_language&.presence || LanguageDetector.instance.detect(@text, @account),
+      application: @options[:application],
+    }
+  end
+
+  def scheduled_status_attributes
+    {
+      scheduled_at: @scheduled_at,
+      media_attachments: @media || [],
+      params: scheduled_options,
+    }
+  end
+
+  def scheduled_options
+    @options.tap do |options_hash|
+      options_hash[:in_reply_to_status_id] = options_hash.delete(:thread)&.id
+      options_hash[:application_id]        = options_hash.delete(:application)&.id
+      options_hash[:scheduled_at]          = nil
+      options_hash[:idempotency]           = nil
+    end
   end
 end
diff --git a/app/services/suspend_account_service.rb b/app/services/suspend_account_service.rb
index 6ab6b2901..1bc2314de 100644
--- a/app/services/suspend_account_service.rb
+++ b/app/services/suspend_account_service.rb
@@ -20,6 +20,7 @@ class SuspendAccountService < BaseService
     owned_lists
     passive_relationships
     report_notes
+    scheduled_statuses
     status_pins
     stream_entries
     subscriptions