DEV: Autoload and segregate features to prep for migration (#341)

This commit autoloads plugin files, and also extracts features into their own modules.
- `plugin.rb` is smaller
- external plugins like discourse-automation and discourse-assign have their own entrypoints
- solved filters as well

Author: nattsw

app/controllers/answer_controller.rb renamed to app/controllers/discourse_solved/answer_controller.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module DiscourseSolved
+  module TopicAnswerMixin
+    def self.included(klass)
+      klass.attributes :has_accepted_answer, :can_have_answer
+    end
+
+    def has_accepted_answer
+      object.custom_fields[::DiscourseSolved::ACCEPTED_ANSWER_POST_ID_CUSTOM_FIELD].present?
+    end
+
+    def include_has_accepted_answer?
+      SiteSetting.solved_enabled
+    end
+
+    def can_have_answer
+      return true if SiteSetting.allow_solved_on_all_topics
+      return false if object.closed || object.archived
+      scope.allow_accepted_answers?(object.category_id, object.tags.map(&:name))
+    end
+
+    def include_can_have_answer?
+      SiteSetting.solved_enabled && SiteSetting.empty_box_on_unsolved
+    end
+  end
+end

app/lib/first_accepted_post_solution_validator.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+DiscourseSolved::Engine.routes.draw do
+  post "/accept" => "answer#accept"
+  post "/unaccept" => "answer#unaccept"
+end
+
+Discourse::Application.routes.draw { mount ::DiscourseSolved::Engine, at: "solution" }

app/lib/plugin_initializers/assigned_reminder_exclude_solved.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module DiscourseAssign
+  class EntryPoint
+    def self.inject(plugin)
+      plugin.register_modifier(:assigns_reminder_assigned_topics_query) do |query|
+        next query if !SiteSetting.ignore_solved_topics_in_assigned_reminder
+        query.where.not(
+          id:
+            TopicCustomField.where(
+              name: ::DiscourseSolved::ACCEPTED_ANSWER_POST_ID_CUSTOM_FIELD,
+            ).pluck(:topic_id),
+        )
+      end
+
+      plugin.register_modifier(:assigned_count_for_user_query) do |query, user|
+        next query if !SiteSetting.ignore_solved_topics_in_assigned_reminder
+        next query if SiteSetting.assignment_status_on_solve.blank?
+        query.where.not(status: SiteSetting.assignment_status_on_solve)
+      end
+
+      plugin.on(:accepted_solution) do |post|
+        next if SiteSetting.assignment_status_on_solve.blank?
+        assignments = Assignment.includes(:target).where(topic: post.topic)
+        assignments.each do |assignment|
+          assigned_user = User.find_by(id: assignment.assigned_to_id)
+          Assigner.new(assignment.target, assigned_user).assign(
+            assigned_user,
+            status: SiteSetting.assignment_status_on_solve,
+          )
+        end
+      end
+
+      plugin.on(:unaccepted_solution) do |post|
+        next if SiteSetting.assignment_status_on_unsolve.blank?
+        assignments = Assignment.includes(:target).where(topic: post.topic)
+        assignments.each do |assignment|
+          assigned_user = User.find_by(id: assignment.assigned_to_id)
+          Assigner.new(assignment.target, assigned_user).assign(
+            assigned_user,
+            status: SiteSetting.assignment_status_on_unsolve,
+          )
+        end
+      end
+    end
+  end
+end

app/serializers/concerns/discourse_solved/topic_answer_mixin.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+module DiscourseAutomation
+  class EntryPoint
+    def self.inject(plugin)
+      plugin.on(:accepted_solution) do |post|
+        # testing directly automation is prone to issues
+        # we prefer to abstract logic in service object and test this
+        next if Rails.env.test?
+
+        name = "first_accepted_solution"
+        DiscourseAutomation::Automation
+          .where(trigger: name, enabled: true)
+          .find_each do |automation|
+            maximum_trust_level = automation.trigger_field("maximum_trust_level")&.dig("value")
+            if FirstAcceptedPostSolutionValidator.check(post, trust_level: maximum_trust_level)
+              automation.trigger!(
+                "kind" => name,
+                "accepted_post_id" => post.id,
+                "usernames" => [post.user.username],
+                "placeholders" => {
+                  "post_url" => Discourse.base_url + post.url,
+                },
+              )
+            end
+          end
+      end
+
+      plugin.add_triggerable_to_scriptable(:first_accepted_solution, :send_pms)
+
+      DiscourseAutomation::Triggerable.add(:first_accepted_solution) do
+        placeholder :post_url
+
+        field :maximum_trust_level,
+              component: :choices,
+              extra: {
+                content: [
+                  {
+                    id: 1,
+                    name:
+                      "discourse_automation.triggerables.first_accepted_solution.max_trust_level.tl1",
+                  },
+                  {
+                    id: 2,
+                    name:
+                      "discourse_automation.triggerables.first_accepted_solution.max_trust_level.tl2",
+                  },
+                  {
+                    id: 3,
+                    name:
+                      "discourse_automation.triggerables.first_accepted_solution.max_trust_level.tl3",
+                  },
+                  {
+                    id: 4,
+                    name:
+                      "discourse_automation.triggerables.first_accepted_solution.max_trust_level.tl4",
+                  },
+                  {
+                    id: "any",
+                    name:
+                      "discourse_automation.triggerables.first_accepted_solution.max_trust_level.any",
+                  },
+                ],
+              },
+              required: true
+      end
+    end
+  end
+end

app/serializers/concerns/topic_answer_mixin.rb

@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+module DiscourseDev
+  class DiscourseSolved
+    def self.populate(plugin)
+      plugin.on(:after_populate_dev_records) do |records, type|
+        next unless SiteSetting.solved_enabled
+
+        if type == :category
+          next if SiteSetting.allow_solved_on_all_topics
+
+          solved_category =
+            DiscourseDev::Record.random(
+              Category.where(
+                read_restricted: false,
+                id: records.pluck(:id),
+                parent_category_id: nil,
+              ),
+            )
+          CategoryCustomField.create!(
+            category_id: solved_category.id,
+            name: ::DiscourseSolved::ENABLE_ACCEPTED_ANSWERS_CUSTOM_FIELD,
+            value: "true",
+          )
+          puts "discourse-solved enabled on category '#{solved_category.name}' (#{solved_category.id})."
+        elsif type == :topic
+          topics = Topic.where(id: records.pluck(:id))
+
+          unless SiteSetting.allow_solved_on_all_topics
+            solved_category_id =
+              CategoryCustomField
+                .where(name: ::DiscourseSolved::ENABLE_ACCEPTED_ANSWERS_CUSTOM_FIELD, value: "true")
+                .first
+                .category_id
+
+            unless topics.exists?(category_id: solved_category_id)
+              topics.last.update(category_id: solved_category_id)
+            end
+
+            topics = topics.where(category_id: solved_category_id)
+          end
+
+          solved_topic = DiscourseDev::Record.random(topics)
+          post = nil
+
+          if solved_topic.posts_count > 1
+            post = DiscourseDev::Record.random(solved_topic.posts.where.not(post_number: 1))
+          else
+            post = DiscourseDev::Post.new(solved_topic, 1).create!
+          end
+
+          ::DiscourseSolved.accept_answer!(post, post.topic.user, topic: post.topic)
+        end
+      end
+    end
+  end
+end

config/routes.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+module ::DiscourseSolved
+  class Engine < ::Rails::Engine
+    engine_name PLUGIN_NAME
+    isolate_namespace DiscourseSolved
+    config.autoload_paths << File.join(config.root, "lib")
+  end
+end

lib/discourse_assign/entry_point.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module DiscourseSolved
+  class FirstAcceptedPostSolutionValidator
+    def self.check(post, trust_level:)
+      return false if post.archetype != Archetype.default
+      return false if !post&.user&.human?
+      return true if trust_level == "any"
+
+      return false if TrustLevel.compare(post&.user&.trust_level, trust_level.to_i)
+
+      if !UserAction.where(user_id: post&.user_id, action_type: UserAction::SOLVED).exists?
+        return true
+      end
+
+      false
+    end
+  end
+end

lib/discourse_automation/entry_point.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+module DiscourseSolved
+  class RegisterFilters
+    def self.register(plugin)
+      solved_callback = ->(scope) do
+        sql = <<~SQL
+      topics.id IN (
+        SELECT topic_id
+          FROM topic_custom_fields
+         WHERE name = '#{::DiscourseSolved::ACCEPTED_ANSWER_POST_ID_CUSTOM_FIELD}'
+           AND value IS NOT NULL
+      )
+    SQL
+
+        scope.where(sql).where("topics.archetype <> ?", Archetype.private_message)
+      end
+      unsolved_callback = ->(scope) do
+        scope = scope.where <<~SQL
+          topics.id NOT IN (
+            SELECT topic_id
+              FROM topic_custom_fields
+             WHERE name = '#{::DiscourseSolved::ACCEPTED_ANSWER_POST_ID_CUSTOM_FIELD}'
+               AND value IS NOT NULL
+          )
+        SQL
+
+        if !SiteSetting.allow_solved_on_all_topics
+          tag_ids = Tag.where(name: SiteSetting.enable_solved_tags.split("|")).pluck(:id)
+
+          scope = scope.where <<~SQL, tag_ids
+        topics.id IN (
+          SELECT t.id
+            FROM topics t
+            JOIN category_custom_fields cc
+              ON t.category_id = cc.category_id
+             AND cc.name = '#{::DiscourseSolved::ENABLE_ACCEPTED_ANSWERS_CUSTOM_FIELD}'
+             AND cc.value = 'true'
+        )
+        OR
+        topics.id IN (
+          SELECT topic_id
+            FROM topic_tags
+           WHERE tag_id IN (?)
+        )
+      SQL
+        end
+
+        scope.where("topics.archetype <> ?", Archetype.private_message)
+      end
+
+      plugin.register_custom_filter_by_status("solved", &solved_callback)
+      plugin.register_custom_filter_by_status("unsolved", &unsolved_callback)
+
+      plugin.register_search_advanced_filter(/status:solved/, &solved_callback)
+      plugin.register_search_advanced_filter(/status:unsolved/, &unsolved_callback)
+
+      TopicQuery.add_custom_filter(:solved) do |results, topic_query|
+        if topic_query.options[:solved] == "yes"
+          solved_callback.call(results)
+        elsif topic_query.options[:solved] == "no"
+          unsolved_callback.call(results)
+        else
+          results
+        end
+      end
+    end
+  end
+end