Implement email search

app/controllers/emails_controller.rb

@@ -1,6 +1,12 @@
 class EmailsController < ApplicationController
   before_action :set_email, only: [:show, :mark_as_read, :body_preview]
 
+  def index
+    @emails = Email.where(mailbox_id: params[:mailbox_id])
+    @emails = @emails.search(params[:q]) if params[:q].present?
+    render(layout: false)
+  end
+
   def show
     @selected = params[:selected]
     @email.mark_as_read! unless @email.read?

app/javascript/controllers/search_controller.js

@@ -0,0 +1,47 @@
+import { Controller } from "stimulus"
+
+export default class extends Controller {
+  static targets = [ "query", "output" ]
+  static values = { url: String }
+
+  connect() {
+    this.requests = [];
+  }
+
+  search() {
+    this.resetTimeout();
+    this.cancelPreviousRequests();
+    this.searchTimeout = setTimeout(() => {
+
+      let abortController = new AbortController();
+      this.requests.push(abortController)
+
+      let signal = abortController.signal;
+      let url = this.urlValue + "&q=" + this.queryTarget.value;
+
+      fetch(url, { signal })
+        .then((response) => {
+          return response.text();
+        })
+        .then((html) => {
+          this.outputTarget.innerHTML = html;
+        })
+        .catch(e => {
+          console.log(e)
+        })
+    }, 75)
+  }
+
+  resetTimeout() {
+    if(this.searchTimeout) {
+      clearTimeout(this.searchTimeout);
+    }
+  }
+
+  cancelPreviousRequests() {
+    this.requests.forEach(request => {
+      request.abort();
+    });
+    this.requests = [];
+  }
+}

app/models/email.rb

@@ -9,6 +9,10 @@ class Email < ApplicationRecord
   validates :rendered_html, presence: true
   validates :rendered_plain_text, presence: true
 
+  def self.search(query)
+    Search::EmailSearch.new.search(self, query)
+  end
+
   def self.unread
     where(read_at: nil)
   end

app/services/search/email_search.rb

@@ -0,0 +1,32 @@
+module Search
+  class EmailSearch
+    def call(collection, search_query)
+      collection.where(where_statement,
+                       search_query_parts: search_query_parts(search_query))
+    end
+
+    alias search call
+
+    private
+
+    def search_query_parts(search_query)
+      return [] if search_query.blank?
+      search_query.split(/\s+/)
+                  .map { |query| "%#{query}%" }
+    end
+
+    def where_statement
+        <<~SQL
+          request_payload->'personalizations'->>personalization_id
+            ILIKE
+              ANY(ARRAY[:search_query_parts])
+          OR
+          subject ILIKE ANY(ARRAY[:search_query_parts])
+          OR
+          template_id ILIKE ANY(ARRAY[:search_query_parts])
+          OR
+          rendered_plain_text ILIKE ANY(ARRAY[:search_query_parts])
+        SQL
+    end
+  end
+end

app/views/emails/index.html.erb

@@ -0,0 +1,18 @@
+<% if @emails.any? %>
+  <div class="email email--no-chrome">
+    <b class="email__from">
+      From
+    </b>
+    <b class="email__to">To</b>
+    <b class="email__subject">Subject</b>
+    <b class="email__created-at">Received At</b>
+  </div>
+  <% @emails.each do |email| %>
+    <%= render(EmailListEntryComponent.new(email: email)) %>
+  <% end %>
+<% else %>
+  <div class="text-center">
+    <p>¯\_(ツ)_/¯</p>
+    <p>We couldn't find any emails.</p>
+  </div>
+<% end %>

app/views/mailboxes/show.html.erb

@@ -1,3 +1,4 @@
+<div data-controller="search" data-search-url-value="<%= emails_path(mailbox_id: @mailbox.id) %>">
   <section>
     <header class="header header--with-border">
       <div class="header--justified-header">
@@ -28,7 +29,16 @@
       <% end %>
     </header>
   </section>
-
+  <div class="form-group">
+    <input class="form-control"
+           data-search-target="query"
+           data-action="keyup->search#search"
+           placeholder="Search..."
+           type="text"
+           class="form-control"
+           />
+  </div>
+  <div data-search-target="output">
     <% if @emails.any? %>
       <div class="email email--no-chrome">
         <b class="email__from">
@@ -54,3 +64,5 @@
         </div>
       </div>
     <% end %>
+  </div>
+</div>

config/routes.rb

@@ -7,7 +7,7 @@ Rails.application.routes.draw do
       post 'clear_mailbox', to: 'mailboxes#clear_mailbox'
     end
   end
-  resources :emails, only: [:show] do
+  resources :emails, only: [:index, :show] do
     member do
       get '/preview', to: 'emails#body_preview'
     end