add some search functionality

Gemfile

@@ -118,3 +118,5 @@ gem "openssl", "~> 3.2"
 gem "mail", "~> 2.7.1"
 
 gem "prometheus-client", "~> 4.2"
+
+gem "meilisearch-rails", "~> 0.10.1"

Gemfile.lock

@@ -249,6 +249,10 @@ GEM
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     marcel (1.0.2)
+    meilisearch (0.25.1)
+      httparty (>= 0.17.1, < 0.22.0)
+    meilisearch-rails (0.10.1)
+      meilisearch (~> 0.25.0)
     method_source (1.0.0)
     mime-types (3.5.1)
       mime-types-data (~> 3.2015)
@@ -535,6 +539,7 @@ DEPENDENCIES
   letter_opener
   lograge
   mail (~> 2.7.1)
+  meilisearch-rails (~> 0.10.1)
   mini_magick
   net-imap
   net-pop

Procfile.dev

@@ -2,3 +2,4 @@ web: unset PORT && bin/rails server
 worker: bundle exec sidekiq
 css: yarn build:css --watch
 js: yarn build --watch
+search: meilisearch --no-analytics --env development --db-path tmp/meilisearch/db --dump-dir tmp/meilisearch/dump --master-key justfordev42069e621

app/assets/stylesheets/search.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the search controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: https://sass-lang.com/

app/controllers/search_controller.rb

@@ -0,0 +1,35 @@
+class SearchController < ApplicationController
+  def index
+    @results = []
+    @query = params[:q]
+    return if @query.blank?
+
+    @results = if params[:multi_search] == "1"
+                 multi_search_experiment
+               else
+                 [*Answer.search(@query), *Question.search(@query)]
+               end
+  end
+
+  private
+
+  def multi_search_experiment
+    MeiliSearch::Rails.client.multi_search(
+      [Answer, Question].map do |klass|
+        {
+          q:                  @query,
+          index_uid:          klass.name.to_s,
+          show_ranking_score: true,
+        }
+      end
+    )["results"].flat_map do |h|
+      model = h["indexUid"].constantize # bad practice!
+      results = model.find(h["hits"].pluck("id")).map { |r| [r.id.to_s, r] }.to_h
+      h["hits"].map { |hit| [hit["_rankingScore"], results[hit["id"]]] }
+    end
+      .sort_by(&:first)
+      .reverse
+      .tap { |results| Rails.logger.debug(results) }
+      .map(&:last)
+  end
+end

app/helpers/search_helper.rb

@@ -0,0 +1,2 @@
+module SearchHelper
+end

app/models/answer.rb

@@ -1,6 +1,12 @@
 class Answer < ApplicationRecord
   extend Answer::TimelineMethods
 
+  include MeiliSearch::Rails
+
+  meilisearch do
+    attribute :content
+  end
+
   belongs_to :user, counter_cache: :answered_count
   belongs_to :question, counter_cache: :answer_count
   has_many :comments, dependent: :destroy

app/models/question.rb

@@ -1,6 +1,12 @@
 class Question < ApplicationRecord
   include Question::AnswerMethods
 
+  include MeiliSearch::Rails
+
+  meilisearch do
+    attribute :content
+  end
+
   belongs_to :user, optional: true
   has_many :answers, dependent: :destroy
   has_many :inboxes, dependent: :destroy

app/views/search/index.haml

@@ -0,0 +1,24 @@
+.container-lg.container--main
+  .row
+    .col-sm-10.col-md-10.col-lg-9.mx-auto
+      .card
+        .card-body
+          = bootstrap_form_with url: search_path, layout: :inline, method: :get do |f|
+            = f.text_field :q, skip_label: true, append: f.primary("Search"), value: params[:q]
+            = f.check_box :multi_search, label: "Multisearch"
+  - unless @results.blank?
+    .container-lg.container--main
+      .row
+        .col-sm-10.col-md-10.col-lg-9.mx-auto
+          - @results.each do |result|
+            - case result
+              - when Answer
+                = render "answerbox", a: result, display_all: false, subscribed_answer_ids: []
+              - when Question
+                = render "shared/question", q: result, type: nil
+
+= render 'shared/links'
+
+:ruby
+  provide(:title, generate_title('Search'))
+  parent_layout 'base'

config/initializers/meilisearch.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+return unless ENV["SEARCH_ENABLED"] == "true"
+
+MeiliSearch::Rails.configuration = {
+  meilisearch_url: ENV.fetch("MEILISEARCH_HOST", "http://localhost:7700"),
+  meilisearch_api_key: ENV.fetch("MEILISEARCH_API_KEY", "justfordev42069e621")
+}

config/routes.rb

@@ -148,6 +148,8 @@
   post "/inbox/create", to: "inbox#create", as: :inbox_create
   get "/inbox", to: "inbox#show", as: :inbox
 
+  get "/search", to: "search#index"
+
   get "/user/:username", to: "user#show"
   get "/@:username", to: "user#show", as: :user
   get "/@:username/a/:id", to: "answer#show", as: :answer

spec/helpers/search_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the SearchHelper. For example:
+#
+# describe SearchHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe SearchHelper, type: :helper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/requests/search_spec.rb

@@ -0,0 +1,11 @@
+require 'rails_helper'
+
+RSpec.describe "Searches", type: :request do
+  describe "GET /index" do
+    it "returns http success" do
+      get "/search/index"
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+end

spec/views/search/index.html.erb_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe "search/index.html.erb", type: :view do
+  pending "add some examples to (or delete) #{__FILE__}"
+end