Add search method to legislation processes

This way we'll be able to search processes in the SDG Management
section.

app/models/legislation/process.rb

@@ -5,6 +5,7 @@ class Legislation::Process < ApplicationRecord
   include Imageable
   include Documentable
   include SDG::Relatable
+  include Searchable
 
   acts_as_paranoid column: :hidden_at
   acts_as_taggable_on :customs
@@ -123,6 +124,22 @@ class Legislation::Process < ApplicationRecord
     end
   end
 
+  def searchable_translations_definitions
+    {
+      title       => "A",
+      summary     => "C",
+      description => "D"
+    }
+  end
+
+  def searchable_values
+    searchable_globalized_values
+  end
+
+  def self.search(terms)
+    pg_search(terms)
+  end
+
   private
 
     def valid_date_ranges

db/migrate/20201216132642_add_tsv_to_legislation_processes.rb

@@ -0,0 +1,5 @@
+class AddTsvToLegislationProcesses < ActiveRecord::Migration[5.2]
+  def change
+    add_column :legislation_processes, :tsv, :tsvector
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_12_16_132234) do
+ActiveRecord::Schema.define(version: 2020_12_16_132642) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_trgm"
@@ -747,6 +747,7 @@ ActiveRecord::Schema.define(version: 2020_12_16_132234) do
     t.boolean "homepage_enabled", default: false
     t.text "background_color"
     t.text "font_color"
+    t.tsvector "tsv"
     t.index ["allegations_end_date"], name: "index_legislation_processes_on_allegations_end_date"
     t.index ["allegations_start_date"], name: "index_legislation_processes_on_allegations_start_date"
     t.index ["debate_end_date"], name: "index_legislation_processes_on_debate_end_date"

lib/tasks/db.rake

@@ -11,8 +11,9 @@ namespace :db do
     load(Rails.root.join("db", "sdg.rb"))
   end
 
-  desc "Calculates the TSV column for all polls"
+  desc "Calculates the TSV column for all polls and legislation processes"
   task calculate_tsv: :environment do
     Poll.find_each(&:calculate_tsvector)
+    Legislation::Process.find_each(&:calculate_tsvector)
   end
 end

spec/lib/tasks/db_spec.rb

@@ -50,4 +50,15 @@ describe "rake db:calculate_tsv" do
 
     expect(poll.reload.tsv).not_to be nil
   end
+
+  it "calculates the tsvector for legislation processes" do
+    process = create(:legislation_process)
+    process.update_column(:tsv, nil)
+
+    expect(process.reload.tsv).to be nil
+
+    run_rake_task
+
+    expect(process.reload.tsv).not_to be nil
+  end
 end

spec/models/legislation/process_spec.rb

@@ -229,4 +229,35 @@ describe Legislation::Process do
       end
     end
   end
+
+  describe ".search" do
+    let!(:traffic) do
+      create(:legislation_process,
+             title: "Traffic regulation",
+             summary: "Lane structure",
+             description: "From top to bottom")
+    end
+
+    let!(:animal_farm) do
+      create(:legislation_process,
+             title: "Hierarchy structure",
+             summary: "Pigs at the top",
+             description: "Napoleon in charge of the traffic")
+    end
+
+    it "returns only matching polls" do
+      expect(Legislation::Process.search("lane")).to eq [traffic]
+      expect(Legislation::Process.search("pigs")).to eq [animal_farm]
+      expect(Legislation::Process.search("nothing here")).to be_empty
+    end
+
+    it "gives more weight to name" do
+      expect(Legislation::Process.search("traffic")).to eq [traffic, animal_farm]
+      expect(Legislation::Process.search("structure")).to eq [animal_farm, traffic]
+    end
+
+    it "gives more weight to summary than description" do
+      expect(Legislation::Process.search("top")).to eq [animal_farm, traffic]
+    end
+  end
 end