work in progress adding roles to personas

# Conflicts:
#	app/models/ai_persona.rb

.discourse-compatibility

@@ -0,0 +1,7 @@
+< 3.3.0.beta1-dev: a65c4076a63104b61d213534db7f89aa3c8acd9e
+< 3.2.0.beta5-dev: c70f43f130fb98e4a1adb1afd9b621aaa49088e3
+< 3.2.0.beta4-dev: 493b48477a9288f2f1b6f021954088705a6673d6
+< 3.2.0.beta2-dev: 3bced1c6f525553fe2b5b79d29bd66c1cf2a47d5
+3.1.999: c0415bb7eb878b1b7abf112d65cba981030df8df
+< 3.2.0.beta1-dev: 3e7c99de894b03e9161d9481da118fe893991a1d
+3.1.0.beta3: 057fbe1ce6

.eslintrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/eslint");

.github/workflows/discourse-plugin.yml

@@ -0,0 +1,11 @@
+name: Discourse Plugin
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  ci:
+    uses: discourse/.github/.github/workflows/discourse-plugin.yml@v1

.gitignore

@@ -0,0 +1,3 @@
+node_modules
+/gems
+/auto_generated

.prettierignore

@@ -0,0 +1,21 @@
+app/assets/stylesheets/vendor/
+documentation/
+package.json
+config/locales/**/*.yml
+!config/locales/**/*.en*.yml
+script/import_scripts/**/*.yml
+
+plugins/**/lib/javascripts/locale
+public/
+!/app/assets/javascripts/discourse/public
+vendor/
+app/assets/javascripts/discourse/tests/fixtures
+spec/
+node_modules/
+dist/
+tmp/
+
+**/*.rb
+**/*.html
+**/*.json
+**/*.md

.prettierrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/prettier");

.rubocop.yml

@@ -0,0 +1,4 @@
+inherit_gem:
+  rubocop-discourse: stree-compat.yml
+RSpec/NamedSubject:
+  Enabled: false

.streerc

@@ -0,0 +1,2 @@
+--print-width=100
+--plugins=plugin/trailing_comma,plugin/disable_auto_ternary

.template-lintrc.cjs

@@ -0,0 +1 @@
+module.exports = require("@discourse/lint-configs/template-lint");

Gemfile

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+group :development do
+  gem "rubocop-discourse"
+  gem "syntax_tree"
+end

Gemfile.lock

@@ -0,0 +1,77 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (7.1.3.2)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      mutex_m
+      tzinfo (~> 2.0)
+    ast (2.4.2)
+    base64 (0.2.0)
+    bigdecimal (3.1.6)
+    concurrent-ruby (1.2.3)
+    connection_pool (2.4.1)
+    drb (2.2.1)
+    i18n (1.14.1)
+      concurrent-ruby (~> 1.0)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
+    minitest (5.22.2)
+    mutex_m (0.2.0)
+    parallel (1.24.0)
+    parser (3.3.0.5)
+      ast (~> 2.4.1)
+      racc
+    prettier_print (1.2.1)
+    racc (1.7.3)
+    rainbow (3.1.1)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
+    rubocop (1.61.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.31.1)
+      parser (>= 3.3.0.4)
+    rubocop-capybara (2.20.0)
+      rubocop (~> 1.41)
+    rubocop-discourse (3.7.1)
+      activesupport (>= 6.1)
+      rubocop (>= 1.59.0)
+      rubocop-capybara (>= 2.0.0)
+      rubocop-factory_bot (>= 2.0.0)
+      rubocop-rspec (>= 2.25.0)
+    rubocop-factory_bot (2.25.1)
+      rubocop (~> 1.41)
+    rubocop-rspec (2.27.1)
+      rubocop (~> 1.40)
+      rubocop-capybara (~> 2.17)
+      rubocop-factory_bot (~> 2.22)
+    ruby-progressbar (1.13.0)
+    syntax_tree (6.2.0)
+      prettier_print (>= 1.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    unicode-display_width (2.5.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rubocop-discourse
+  syntax_tree
+
+BUNDLED WITH
+   2.5.4

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2021 Civilized Discourse Construction Kit
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -1,3 +1,5 @@
-# Discourse AI is now shipped with Discourse core
+# **Discourse AI** Plugin
 
-https://github.com/discourse/discourse/tree/main/plugins/discourse-ai
+**Plugin Summary**
+
+For more information, please see: https://meta.discourse.org/t/discourse-ai/259214?u=falco

admin/assets/javascripts/discourse/routes/admin-plugins-show-discourse-ai-ai-personas-index.js

@@ -0,0 +1,7 @@
+import DiscourseRoute from "discourse/routes/discourse";
+
+export default DiscourseRoute.extend({
+  model() {
+    return this.modelFor("adminPlugins.show.discourse-ai.ai-personas");
+  },
+});

admin/assets/javascripts/discourse/routes/admin-plugins-show-discourse-ai-ai-personas-new.js

@@ -0,0 +1,23 @@
+import { AUTO_GROUPS } from "discourse/lib/constants";
+import DiscourseRoute from "discourse/routes/discourse";
+
+export default DiscourseRoute.extend({
+  async model() {
+    const record = this.store.createRecord("ai-persona");
+    record.set("allowed_group_ids", [AUTO_GROUPS.trust_level_0.id]);
+    record.set("rag_uploads", []);
+    // these match the defaults on the table
+    record.set("rag_chunk_tokens", 374);
+    record.set("rag_chunk_overlap_tokens", 10);
+    record.set("rag_conversation_chunks", 10);
+    return record;
+  },
+
+  setupController(controller, model) {
+    this._super(controller, model);
+    controller.set(
+      "allPersonas",
+      this.modelFor("adminPlugins.show.discourse-ai.ai-personas")
+    );
+  },
+});

admin/assets/javascripts/discourse/routes/admin-plugins-show-discourse-ai-ai-personas-show.js

@@ -0,0 +1,19 @@
+import DiscourseRoute from "discourse/routes/discourse";
+
+export default DiscourseRoute.extend({
+  async model(params) {
+    const allPersonas = this.modelFor(
+      "adminPlugins.show.discourse-ai.ai-personas"
+    );
+    const id = parseInt(params.id, 10);
+    return allPersonas.findBy("id", id);
+  },
+
+  setupController(controller, model) {
+    this._super(controller, model);
+    controller.set(
+      "allPersonas",
+      this.modelFor("adminPlugins.show.discourse-ai.ai-personas")
+    );
+  },
+});

admin/assets/javascripts/discourse/routes/admin-plugins-show-discourse-ai-ai-personas.js

@@ -0,0 +1,7 @@
+import DiscourseRoute from "discourse/routes/discourse";
+
+export default class DiscourseAiAiPersonasRoute extends DiscourseRoute {
+  model() {
+    return this.store.findAll("ai-persona");
+  }
+}

admin/assets/javascripts/discourse/routes/admin-plugins-show-discourse-ai-index.js

@@ -0,0 +1,12 @@
+import { inject as service } from "@ember/service";
+import DiscourseRoute from "discourse/routes/discourse";
+
+export default class DiscourseAiIndexRoute extends DiscourseRoute {
+  @service router;
+
+  beforeModel() {
+    return this.router.transitionTo(
+      "adminPlugins.show.discourse-ai.ai-personas.index"
+    );
+  }
+}

admin/assets/javascripts/discourse/templates/admin-plugins/show/discourse-ai/ai-personas/index.hbs

@@ -0,0 +1 @@
+<AiPersonaListEditor @personas={{this.model}} />

admin/assets/javascripts/discourse/templates/admin-plugins/show/discourse-ai/ai-personas/new.hbs

@@ -0,0 +1,4 @@
+<AiPersonaListEditor
+  @personas={{this.allPersonas}}
+  @currentPersona={{this.model}}
+/>

admin/assets/javascripts/discourse/templates/admin-plugins/show/discourse-ai/ai-personas/show.hbs

@@ -0,0 +1,4 @@
+<AiPersonaListEditor
+  @personas={{this.allPersonas}}
+  @currentPersona={{this.model}}
+/>

app/controllers/discourse_ai/admin/ai_personas_controller.rb

@@ -0,0 +1,181 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module Admin
+    class AiPersonasController < ::Admin::AdminController
+      requires_plugin ::DiscourseAi::PLUGIN_NAME
+
+      before_action :find_ai_persona,
+                    only: %i[show update destroy create_user indexing_status_check]
+
+      def index
+        ai_personas =
+          AiPersona.ordered.map do |persona|
+            # we use a special serializer here cause names and descriptions are
+            # localized for system personas
+            LocalizedAiPersonaSerializer.new(persona, root: false)
+          end
+        tools =
+          DiscourseAi::AiBot::Personas::Persona.all_available_tools.map do |tool|
+            AiToolSerializer.new(tool, root: false)
+          end
+        llms =
+          DiscourseAi::Configuration::LlmEnumerator.values.map do |hash|
+            { id: hash[:value], name: hash[:name] }
+          end
+        render json: { ai_personas: ai_personas, meta: { commands: tools, llms: llms } }
+      end
+
+      def show
+        render json: LocalizedAiPersonaSerializer.new(@ai_persona)
+      end
+
+      def create
+        ai_persona = AiPersona.new(ai_persona_params.except(:rag_uploads))
+        if ai_persona.save
+          RagDocumentFragment.link_persona_and_uploads(ai_persona, attached_upload_ids)
+
+          render json: { ai_persona: ai_persona }, status: :created
+        else
+          render_json_error ai_persona
+        end
+      end
+
+      def create_user
+        user = @ai_persona.create_user!
+        render json: BasicUserSerializer.new(user, root: "user")
+      end
+
+      def update
+        if @ai_persona.update(ai_persona_params.except(:rag_uploads))
+          RagDocumentFragment.update_persona_uploads(@ai_persona, attached_upload_ids)
+
+          render json: @ai_persona
+        else
+          render_json_error @ai_persona
+        end
+      end
+
+      def destroy
+        if @ai_persona.destroy
+          head :no_content
+        else
+          render_json_error @ai_persona
+        end
+      end
+
+      def upload_file
+        file = params[:file] || params[:files].first
+
+        if !SiteSetting.ai_embeddings_enabled?
+          raise Discourse::InvalidAccess.new("Embeddings not enabled")
+        end
+
+        validate_extension!(file.original_filename)
+        validate_file_size!(file.tempfile.size)
+
+        hijack do
+          upload =
+            UploadCreator.new(
+              file.tempfile,
+              file.original_filename,
+              type: "discourse_ai_rag_upload",
+              skip_validations: true,
+            ).create_for(current_user.id)
+
+          if upload.persisted?
+            render json: UploadSerializer.new(upload)
+          else
+            render json: failed_json.merge(errors: upload.errors.full_messages), status: 422
+          end
+        end
+      end
+
+      def indexing_status_check
+        render json: RagDocumentFragment.indexing_status(@ai_persona, @ai_persona.uploads)
+      end
+
+      private
+
+      def find_ai_persona
+        @ai_persona = AiPersona.find(params[:id])
+      end
+
+      def attached_upload_ids
+        ai_persona_params[:rag_uploads].to_a.map { |h| h[:id] }
+      end
+
+      def ai_persona_params
+        permitted =
+          params.require(:ai_persona).permit(
+            :name,
+            :description,
+            :enabled,
+            :system_prompt,
+            :priority,
+            :top_p,
+            :temperature,
+            :default_llm,
+            :user_id,
+            :mentionable,
+            :max_context_posts,
+            :vision_enabled,
+            :vision_max_pixels,
+            :rag_chunk_tokens,
+            :rag_chunk_overlap_tokens,
+            :rag_conversation_chunks,
+            :question_consolidator_llm,
+            :role,
+            allowed_group_ids: [],
+            rag_uploads: [:id],
+          )
+
+        if commands = params.dig(:ai_persona, :commands)
+          permitted[:commands] = permit_commands(commands)
+        end
+
+        permitted
+      end
+
+      def permit_commands(commands)
+        return [] if !commands.is_a?(Array)
+
+        commands.filter_map do |command, options|
+          break nil if !command.is_a?(String)
+          options&.permit! if options && options.is_a?(ActionController::Parameters)
+
+          if options
+            [command, options]
+          else
+            command
+          end
+        end
+      end
+
+      def validate_extension!(filename)
+        extension = File.extname(filename)[1..-1] || ""
+        authorized_extensions = %w[txt md]
+        if !authorized_extensions.include?(extension)
+          raise Discourse::InvalidParameters.new(
+                  I18n.t(
+                    "upload.unauthorized",
+                    authorized_extensions: authorized_extensions.join(" "),
+                  ),
+                )
+        end
+      end
+
+      def validate_file_size!(filesize)
+        max_size_bytes = 20.megabytes
+        if filesize > max_size_bytes
+          raise Discourse::InvalidParameters.new(
+                  I18n.t(
+                    "upload.attachments.too_large_humanized",
+                    max_size: ActiveSupport::NumberHelper.number_to_human_size(max_size_bytes),
+                  ),
+                )
+        end
+      end
+    end
+  end
+end

app/controllers/discourse_ai/admin/dashboard_controller.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module Admin
+    class DashboardController < ::Admin::StaffController
+      requires_plugin DiscourseAi::PLUGIN_NAME
+
+      def sentiment
+      end
+    end
+  end
+end

app/controllers/discourse_ai/ai_bot/bot_controller.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module AiBot
+    class BotController < ::ApplicationController
+      requires_plugin ::DiscourseAi::PLUGIN_NAME
+      requires_login
+
+      def show_debug_info
+        post = Post.find(params[:post_id])
+        guardian.ensure_can_debug_ai_bot_conversation!(post)
+
+        posts =
+          Post
+            .where("post_number <= ?", post.post_number)
+            .where(topic_id: post.topic_id)
+            .order("post_number DESC")
+
+        debug_info = AiApiAuditLog.where(post: posts).order(created_at: :desc).first
+
+        render json: debug_info, status: 200
+      end
+
+      def stop_streaming_response
+        post = Post.find(params[:post_id])
+        guardian.ensure_can_see!(post)
+
+        Discourse.redis.del("gpt_cancel:#{post.id}")
+
+        render json: {}, status: 200
+      end
+
+      def show_bot_username
+        bot_user_id = DiscourseAi::AiBot::EntryPoint.map_bot_model_to_user_id(params[:username])
+        raise Discourse::InvalidParameters.new(:username) if !bot_user_id
+
+        bot_username_lower = User.find(bot_user_id).username_lower
+
+        render json: { bot_username: bot_username_lower }, status: 200
+      end
+    end
+  end
+end

app/controllers/discourse_ai/ai_bot/shared_ai_conversations_controller.rb

@@ -0,0 +1,108 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module AiBot
+    class SharedAiConversationsController < ::ApplicationController
+      requires_plugin ::DiscourseAi::PLUGIN_NAME
+      requires_login only: %i[create update destroy]
+      before_action :require_site_settings!
+
+      skip_before_action :preload_json, :check_xhr, :redirect_to_login_if_required, only: %i[show]
+
+      def create
+        ensure_allowed_create!
+
+        RateLimiter.new(current_user, "share-ai-conversation", 10, 1.minute).performed!
+
+        shared_conversation = SharedAiConversation.share_conversation(current_user, @topic)
+
+        if shared_conversation.persisted?
+          render json: success_json.merge(share_key: shared_conversation.share_key)
+        else
+          render json: failed_json.merge(error: I18n.t("discourse_ai.share_ai.failed_to_share")),
+                 status: :unprocessable_entity
+        end
+      end
+
+      def destroy
+        ensure_allowed_destroy!
+
+        SharedAiConversation.destroy_conversation(@shared_conversation)
+
+        render json:
+                 success_json.merge(message: I18n.t("discourse_ai.share_ai.conversation_deleted"))
+      end
+
+      def show
+        @shared_conversation = SharedAiConversation.find_by(share_key: params[:share_key])
+        raise Discourse::NotFound if @shared_conversation.blank?
+
+        expires_in 1.minute, public: true
+        response.headers["X-Robots-Tag"] = "noindex"
+
+        if request.format.json?
+          render json: success_json.merge(@shared_conversation.to_json)
+        else
+          render "show", layout: false
+        end
+      end
+
+      def preview
+        ensure_allowed_preview!
+        data = SharedAiConversation.build_conversation_data(@topic, include_usernames: true)
+        data[:error] = @error if @error
+        data[:share_key] = @shared_conversation.share_key if @shared_conversation
+        data[:topic_id] = @topic.id
+        render json: data
+      end
+
+      private
+
+      def require_site_settings!
+        if !SiteSetting.discourse_ai_enabled ||
+             !SiteSetting.ai_bot_public_sharing_allowed_groups_map.any? ||
+             !SiteSetting.ai_bot_enabled
+          raise Discourse::NotFound
+        end
+      end
+
+      def ensure_allowed_preview!
+        @topic = Topic.find_by(id: params[:topic_id])
+        raise Discourse::NotFound if !@topic
+
+        @shared_conversation = SharedAiConversation.find_by(target: @topic)
+
+        @error = DiscourseAi::AiBot::EntryPoint.ai_share_error(@topic, guardian)
+        if @error == :not_allowed
+          raise Discourse::InvalidAccess.new(
+                  nil,
+                  nil,
+                  custom_message: "discourse_ai.share_ai.errors.#{@error}",
+                )
+        end
+      end
+
+      def ensure_allowed_destroy!
+        @shared_conversation = SharedAiConversation.find_by(share_key: params[:share_key])
+
+        raise Discourse::InvalidAccess if @shared_conversation.blank?
+
+        guardian.ensure_can_destroy_shared_ai_bot_conversation!(@shared_conversation)
+      end
+
+      def ensure_allowed_create!
+        @topic = Topic.find_by(id: params[:topic_id])
+        raise Discourse::NotFound if !@topic
+
+        error = DiscourseAi::AiBot::EntryPoint.ai_share_error(@topic, guardian)
+        if error
+          raise Discourse::InvalidAccess.new(
+                  nil,
+                  nil,
+                  custom_message: "discourse_ai.share_ai.errors.#{error}",
+                )
+        end
+      end
+    end
+  end
+end

app/controllers/discourse_ai/ai_helper/assistant_controller.rb

@@ -0,0 +1,165 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module AiHelper
+    class AssistantController < ::ApplicationController
+      requires_plugin ::DiscourseAi::PLUGIN_NAME
+      requires_login
+      before_action :ensure_can_request_suggestions
+      before_action :rate_limiter_performed!, except: %i[prompts]
+
+      include SecureUploadEndpointHelpers
+
+      def suggest
+        input = get_text_param!
+
+        prompt = CompletionPrompt.find_by(id: params[:mode])
+
+        raise Discourse::InvalidParameters.new(:mode) if !prompt || !prompt.enabled?
+
+        if prompt.id == CompletionPrompt::CUSTOM_PROMPT
+          raise Discourse::InvalidParameters.new(:custom_prompt) if params[:custom_prompt].blank?
+
+          prompt.custom_instruction = params[:custom_prompt]
+        end
+
+        suggest_thumbnails(input) if prompt.id == CompletionPrompt::ILLUSTRATE_POST
+
+        hijack do
+          render json:
+                   DiscourseAi::AiHelper::Assistant.new.generate_and_send_prompt(
+                     prompt,
+                     input,
+                     current_user,
+                   ),
+                 status: 200
+        end
+      rescue DiscourseAi::Completions::Endpoints::Base::CompletionFailed
+        render_json_error I18n.t("discourse_ai.ai_helper.errors.completion_request_failed"),
+                          status: 502
+      end
+
+      def suggest_title
+        input = get_text_param!
+
+        prompt = CompletionPrompt.enabled_by_name("generate_titles")
+        raise Discourse::InvalidParameters.new(:mode) if !prompt
+
+        hijack do
+          render json:
+                   DiscourseAi::AiHelper::Assistant.new.generate_and_send_prompt(
+                     prompt,
+                     input,
+                     current_user,
+                   ),
+                 status: 200
+        end
+      rescue DiscourseAi::Completions::Endpoints::Base::CompletionFailed
+        render_json_error I18n.t("discourse_ai.ai_helper.errors.completion_request_failed"),
+                          status: 502
+      end
+
+      def suggest_category
+        input = get_text_param!
+        input_hash = { text: input }
+
+        render json:
+                 DiscourseAi::AiHelper::SemanticCategorizer.new(
+                   input_hash,
+                   current_user,
+                 ).categories,
+               status: 200
+      end
+
+      def suggest_tags
+        input = get_text_param!
+        input_hash = { text: input }
+
+        render json: DiscourseAi::AiHelper::SemanticCategorizer.new(input_hash, current_user).tags,
+               status: 200
+      end
+
+      def suggest_thumbnails(input)
+        hijack do
+          thumbnails = DiscourseAi::AiHelper::Painter.new.commission_thumbnails(input, current_user)
+
+          render json: { thumbnails: thumbnails }, status: 200
+        end
+      end
+
+      def explain
+        post_id = get_post_param!
+        term_to_explain = get_text_param!
+        post = Post.includes(:topic).find_by(id: post_id)
+
+        raise Discourse::InvalidParameters.new(:post_id) unless post
+
+        Jobs.enqueue(
+          :stream_post_helper,
+          post_id: post.id,
+          user_id: current_user.id,
+          term_to_explain: term_to_explain,
+        )
+
+        render json: { success: true }, status: 200
+      rescue DiscourseAi::Completions::Endpoints::Base::CompletionFailed
+        render_json_error I18n.t("discourse_ai.ai_helper.errors.completion_request_failed"),
+                          status: 502
+      end
+
+      def caption_image
+        image_url = params[:image_url]
+        raise Discourse::InvalidParameters.new(:image_url) if !image_url
+
+        image = upload_from_full_url(image_url)
+        raise Discourse::NotFound if image.blank?
+        final_image_url = get_caption_url(image, image_url)
+
+        hijack do
+          caption =
+            DiscourseAi::AiHelper::Assistant.new.generate_image_caption(
+              final_image_url,
+              current_user,
+            )
+          render json: {
+                   caption:
+                     "#{caption} (#{I18n.t("discourse_ai.ai_helper.image_caption.attribution")})",
+                 },
+                 status: 200
+        end
+      rescue DiscourseAi::Completions::Endpoints::Base::CompletionFailed, Net::HTTPBadResponse
+        render_json_error I18n.t("discourse_ai.ai_helper.errors.completion_request_failed"),
+                          status: 502
+      end
+
+      private
+
+      def get_text_param!
+        params[:text].tap { |t| raise Discourse::InvalidParameters.new(:text) if t.blank? }
+      end
+
+      def get_post_param!
+        params[:post_id].tap { |t| raise Discourse::InvalidParameters.new(:post_id) if t.blank? }
+      end
+
+      def rate_limiter_performed!
+        RateLimiter.new(current_user, "ai_assistant", 6, 3.minutes).performed!
+      end
+
+      def ensure_can_request_suggestions
+        if !current_user.in_any_groups?(SiteSetting.ai_helper_allowed_groups_map)
+          raise Discourse::InvalidAccess
+        end
+      end
+
+      def get_caption_url(image_upload, image_url)
+        if image_upload.secure?
+          check_secure_upload_permission(image_upload)
+          return Discourse.store.url_for(image_upload)
+        end
+
+        UrlHelper.absolute(image_url)
+      end
+    end
+  end
+end

app/controllers/discourse_ai/embeddings/embeddings_controller.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module Embeddings
+    class EmbeddingsController < ::ApplicationController
+      requires_plugin ::DiscourseAi::PLUGIN_NAME
+
+      SEMANTIC_SEARCH_TYPE = "semantic_search"
+
+      def search
+        query = params[:q].to_s
+
+        if query.length < SiteSetting.min_search_term_length
+          raise Discourse::InvalidParameters.new(:q)
+        end
+
+        grouped_results =
+          Search::GroupedSearchResults.new(
+            type_filter: SEMANTIC_SEARCH_TYPE,
+            term: query,
+            search_context: guardian,
+            use_pg_headlines_for_excerpt: false,
+          )
+
+        semantic_search = DiscourseAi::Embeddings::SemanticSearch.new(guardian)
+
+        if !semantic_search.cached_query?(query)
+          RateLimiter.new(current_user, "semantic-search", 4, 1.minutes).performed!
+        end
+
+        hijack do
+          semantic_search
+            .search_for_topics(query)
+            .each { |topic_post| grouped_results.add(topic_post) }
+
+          render_serialized(grouped_results, GroupedSearchResultSerializer, result: grouped_results)
+        end
+      end
+
+      def quick_search
+        query = params[:q].to_s
+
+        if query.length < SiteSetting.min_search_term_length
+          raise Discourse::InvalidParameters.new(:q)
+        end
+
+        grouped_results =
+          Search::GroupedSearchResults.new(
+            type_filter: SEMANTIC_SEARCH_TYPE,
+            term: query,
+            search_context: guardian,
+            use_pg_headlines_for_excerpt: false,
+          )
+
+        semantic_search = DiscourseAi::Embeddings::SemanticSearch.new(guardian)
+
+        if !semantic_search.cached_query?(query)
+          RateLimiter.new(current_user, "semantic-search", 60, 1.minutes).performed!
+        end
+
+        hijack do
+          semantic_search.quick_search(query).each { |topic_post| grouped_results.add(topic_post) }
+
+          render_serialized(grouped_results, GroupedSearchResultSerializer, result: grouped_results)
+        end
+      end
+    end
+  end
+end

app/helpers/discourse_ai/ai_bot/shared_ai_conversations_helper.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+module DiscourseAi
+  module AiBot
+    module SharedAiConversationsHelper
+      # bump up version when assets change
+      # long term we may want to change this cause it is hard to remember
+      # to bump versions, but for now this does the job
+      VERSION = "1"
+
+      def share_asset_url(short_path)
+        ::UrlHelper.local_cdn_url("/plugins/discourse-ai/ai-share/#{short_path}?#{VERSION}")
+      end
+    end
+  end
+end

app/jobs/regular/create_ai_reply.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+module ::Jobs
+  class CreateAiReply < ::Jobs::Base
+    sidekiq_options retry: false
+
+    def execute(args)
+      return unless bot_user = User.find_by(id: args[:bot_user_id])
+      return unless post = Post.includes(:topic).find_by(id: args[:post_id])
+      persona_id = args[:persona_id]
+
+      begin
+        persona =
+          if args[:skip_persona_security_check]
+            persona = AiPersona.all_personas.find { |persona| persona.id == persona_id }
+          else
+            persona = DiscourseAi::AiBot::Personas::Persona.find_by(user: post.user, id: persona_id)
+          end
+
+        raise DiscourseAi::AiBot::Bot::BOT_NOT_FOUND if persona.nil?
+
+        bot = DiscourseAi::AiBot::Bot.as(bot_user, persona: persona.new)
+
+        DiscourseAi::AiBot::Playground.new(bot).reply_to(post)
+      rescue DiscourseAi::AiBot::Bot::BOT_NOT_FOUND
+        Rails.logger.warn(
+          "Bot not found for post #{post.id} - perhaps persona was deleted or bot was disabled",
+        )
+      end
+    end
+  end
+end

app/jobs/regular/digest_rag_upload.rb

@@ -0,0 +1,172 @@
+# frozen_string_literal: true
+
+module ::Jobs
+  class DigestRagUpload < ::Jobs::Base
+    CHUNK_SIZE = 1024
+    CHUNK_OVERLAP = 64
+    MAX_FRAGMENTS = 100_000
+
+    # TODO(roman): Add a way to automatically recover from errors, resulting in unindexed uploads.
+    def execute(args)
+      return if (upload = Upload.find_by(id: args[:upload_id])).nil?
+      return if (ai_persona = AiPersona.find_by(id: args[:ai_persona_id])).nil?
+
+      truncation = DiscourseAi::Embeddings::Strategies::Truncation.new
+      vector_rep =
+        DiscourseAi::Embeddings::VectorRepresentations::Base.current_representation(truncation)
+
+      tokenizer = vector_rep.tokenizer
+      chunk_tokens = ai_persona.rag_chunk_tokens
+      overlap_tokens = ai_persona.rag_chunk_overlap_tokens
+
+      fragment_ids = RagDocumentFragment.where(ai_persona: ai_persona, upload: upload).pluck(:id)
+
+      # Check if this is the first time we process this upload.
+      if fragment_ids.empty?
+        document = get_uploaded_file(upload)
+        return if document.nil?
+
+        RagDocumentFragment.publish_status(upload, { total: 0, indexed: 0, left: 0 })
+
+        fragment_ids = []
+        idx = 0
+
+        ActiveRecord::Base.transaction do
+          chunk_document(
+            file: document,
+            tokenizer: tokenizer,
+            chunk_tokens: chunk_tokens,
+            overlap_tokens: overlap_tokens,
+          ) do |chunk, metadata|
+            fragment_ids << RagDocumentFragment.create!(
+              ai_persona: ai_persona,
+              fragment: chunk,
+              fragment_number: idx + 1,
+              upload: upload,
+              metadata: metadata,
+            ).id
+
+            idx += 1
+
+            if idx > MAX_FRAGMENTS
+              Rails.logger.warn("Upload #{upload.id} has too many fragments, truncating.")
+              break
+            end
+          end
+        end
+      end
+
+      fragment_ids.each_slice(50) do |slice|
+        Jobs.enqueue(:generate_rag_embeddings, fragment_ids: slice)
+      end
+    end
+
+    private
+
+    def chunk_document(file:, tokenizer:, chunk_tokens:, overlap_tokens:)
+      buffer = +""
+      current_metadata = nil
+      done = false
+      overlap = ""
+
+      # generally this will be plenty
+      read_size = chunk_tokens * 10
+
+      while buffer.present? || !done
+        if buffer.length < read_size
+          read = file.read(read_size)
+          done = true if read.nil?
+
+          read = Encodings.to_utf8(read) if read
+
+          buffer << (read || "")
+        end
+
+        # at this point we unconditionally have 2x CHUNK_SIZE worth of data in the buffer
+        metadata_regex = /\[\[metadata (.*?)\]\]/m
+
+        before_metadata, new_metadata, after_metadata = buffer.split(metadata_regex)
+        to_chunk = nil
+
+        if before_metadata.present?
+          to_chunk = before_metadata
+        elsif after_metadata.present?
+          current_metadata = new_metadata
+          to_chunk = after_metadata
+          buffer = buffer.split(metadata_regex, 2).last
+          overlap = ""
+        else
+          current_metadata = new_metadata
+          buffer = buffer.split(metadata_regex, 2).last
+          overlap = ""
+          next
+        end
+
+        chunk, split_char = first_chunk(to_chunk, tokenizer: tokenizer, chunk_tokens: chunk_tokens)
+        buffer = buffer[chunk.length..-1]
+
+        processed_chunk = overlap + chunk
+
+        processed_chunk.strip!
+        processed_chunk.gsub!(/\n[\n]+/, "\n\n")
+
+        yield processed_chunk, current_metadata
+
+        current_chunk_tokens = tokenizer.encode(chunk)
+        overlap_token_ids = current_chunk_tokens[-overlap_tokens..-1] || current_chunk_tokens
+
+        overlap = ""
+
+        while overlap_token_ids.present?
+          begin
+            overlap = tokenizer.decode(overlap_token_ids) + split_char
+            break if overlap.encoding == Encoding::UTF_8
+          rescue StandardError
+            # it is possible that we truncated mid char
+          end
+          overlap_token_ids.shift
+        end
+
+        # remove first word it is probably truncated
+        overlap = overlap.split(" ", 2).last
+      end
+    end
+
+    def first_chunk(text, chunk_tokens:, tokenizer:, splitters: ["\n\n", "\n", ".", ""])
+      return text, " " if tokenizer.tokenize(text).length <= chunk_tokens
+
+      splitters = splitters.find_all { |s| text.include?(s) }.compact
+
+      buffer = +""
+      split_char = nil
+
+      splitters.each do |splitter|
+        split_char = splitter
+
+        text
+          .split(split_char)
+          .each do |part|
+            break if tokenizer.tokenize(buffer + split_char + part).length > chunk_tokens
+            buffer << split_char
+            buffer << part
+          end
+        break if buffer.length > 0
+      end
+
+      [buffer, split_char]
+    end
+
+    def get_uploaded_file(upload)
+      store = Discourse.store
+      @file ||=
+        if store.external?
+          # Upload#filesize could be approximate.
+          # add two extra Mbs to make sure that we'll be able to download the upload.
+          max_filesize = upload.filesize + 2.megabytes
+          store.download(upload, max_file_size_kb: max_filesize)
+        else
+          File.open(store.path_for(upload))
+        end
+    end
+  end
+end