Use ajax to improve some functionalities

lib/librarix/application.rb

@@ -17,8 +17,19 @@ module Librarix
     end
 
     get '/search' do
-      movies = params.key?('search') ? Tmdb::Movie.find(params['search']) : Tmdb::Movie.popular.map { |m| Tmdb::Movie.new(m) }
-      slim :search, locals: {movies: movies, conf: Tmdb::Configuration.new}
+      movies = if params['search'].nil?
+        Tmdb::Movie.popular.map { |m| Tmdb::Movie.new(m) }
+      elsif params['search'] == ''
+        []
+      else
+        Tmdb::Movie.find(params['search'])
+      end
+
+      if request.xhr?
+        slim :list, layout: false, locals: {movies: movies}
+      else
+        slim :search, locals: {movies: movies}
+      end
     end
 
     post '/add' do
@@ -36,7 +47,11 @@ module Librarix
     post '/remove' do
       Librarix::Redis::Movie.new(params[:id]).remove
 
+      if request.xhr?
+        ""
+      else
         redirect to('/')
       end
     end
   end
+end

lib/librarix/assets/application.scss

@@ -1,19 +1,45 @@
 body {
-  margin: 0;
+  margin: 10px;
 }
 
 h2 {
   margin-top: 0;
 }
 
+#search {
+  display: flex;
+
+  input {
+    border-radius: 0.4em;
+    border: solid 3px #f4f4f4;
+  }
+
+  input[type="submit"] {
+    background-color: #f4f4f4;
+  }
+
+  input[type="text"] {
+    flex-grow: 1;
+    font-size: 1.4em;
+    padding: 5px;
+  }
+}
+
 ul {
   list-style-type: none;
   margin: 0;
   padding: 0;
 
   li {
-    padding: 10px;
+    padding: 10px 0;
+  }
 
+  li:nth-child(even) {
+    background-color: #f4f4f4;
+  }
+}
+
+.movie {
   display: flex;
   flex-flow: row wrap;
   align-items: center;
@@ -28,8 +54,3 @@ ul {
     flex: 1 1 300px;
   }
 }
-
-  li:nth-child(even) {
-    background-color: #f4f4f4;
-  }
-}

lib/librarix/public/application.css

@@ -1 +1 @@
-body{margin:0}h2{margin-top:0}ul{list-style-type:none;margin:0;padding:0}ul li{padding:10px;display:flex;flex-flow:row wrap;align-items:center;justify-content:center}ul li .poster{margin-right:10px}ul li .informations{align-self:flex-start;flex:1 1 300px}ul li:nth-child(even){background-color:#f4f4f4}
+body{margin:10px}h2{margin-top:0}#search{display:flex}#search input{border-radius:0.4em;border:solid 3px #f4f4f4}#search input[type="submit"]{background-color:#f4f4f4}#search input[type="text"]{flex-grow:1;font-size:1.4em;padding:5px}ul{list-style-type:none;margin:0;padding:0}ul li{padding:10px 0}ul li:nth-child(even){background-color:#f4f4f4}.movie{display:flex;flex-flow:row wrap;align-items:center;justify-content:center}.movie .poster{margin-right:10px}.movie .informations{align-self:flex-start;flex:1 1 300px}

lib/librarix/public/application.js

@@ -1,2 +1,65 @@
-document.addEventListener('DOMContentLoaded', function(event) {
+function initButtons() {
+  var buttons = document.querySelectorAll('button[data-action=remove-movie]');
+  for (var i = 0; i < buttons.length; i++) {
+    buttons[i].addEventListener('click', function(event) {
+      event.preventDefault();
+      removeMovie(this.previousElementSibling.value)
+    });
+  }
+}
+
+function initSearch() {
+  var typing_timer;
+  var typing_interval = 300;
+
+  document.querySelector('#search > input[type="text"]').addEventListener('input', function(event) {
+    var value = this.value;
+
+    clearTimeout(typing_timer);
+    typing_timer = setTimeout(function() { search(value); }, typing_interval);
+  });
+  document.querySelector('#search > input[type="submit"]').style.display = 'none';
+
+  window.addEventListener('popstate', function(event) {
+    document.querySelector('#search > input[type="text"]').value = event.state.value;
+    search(event.state.value);
+  });
+}
+
+function search(value) {
+  var url = '/search?search=' + encodeURIComponent(value)
+  window.history.pushState({value: value}, "", url);
+
+  var req = new XMLHttpRequest();
+  req.open('GET', url);
+  req.setRequestHeader("X-Requested-With", "XMLHttpRequest");
+
+  req.addEventListener('load', function(e) {
+    document.getElementById('movies').parentNode.innerHTML = this.responseText;
+  });
+
+  req.send()
+}
+
+function removeMovie(id) {
+  var data = new FormData();
+  data.append('id', id);
+
+  var req = new XMLHttpRequest();
+  req.open('POST', '/remove');
+  req.setRequestHeader("X-Requested-With", "XMLHttpRequest");
+
+  req.addEventListener('load', function(e) {
+    document.querySelector('.movie[data-id="' + id + '"]').parentNode.remove();
+  });
+
+  req.send(data)
+}
+
+document.addEventListener('DOMContentLoaded', function(event) {
+  initButtons();
+
+  if(document.querySelector('#search') != null) {
+    initSearch();
+  }
 });

lib/librarix/views/index.slim

@@ -1,6 +1,3 @@
 - content_for(:title) { 'Index' }
 
-ul
-  - movies.each do |movie|
-    li
-      == slim :movie, locals: {movie: movie}
+== slim :list, locals: {movies: movies}

lib/librarix/views/layout.slim

@@ -7,5 +7,4 @@ html
     link rel="stylesheet" media="all" href="/application.css"
     script type="text/javascript" src="/application.js"
   body
-    div#main
     == yield

lib/librarix/views/list.slim

@@ -0,0 +1,4 @@
+ul#movies
+  - movies.each do |movie|
+    li
+      == slim :movie, locals: {movie: movie}

lib/librarix/views/movie.slim

@@ -1,3 +1,4 @@
+.movie data-id="#{movie.id}"
   .poster
     - if movie.poster_path
       img src="#{poster_url(movie.poster_path, 'w154')}"
@@ -9,8 +10,8 @@
     - if movie.added?
       form method="post" action="/remove"
         input type="hidden" name="id" value="#{movie.id}"
-      button type="submit" Remove
+        button type="submit" data-action="remove-movie" Remove
     - else
       form method="post" action="/add"
         input type="hidden" name="id" value="#{movie.id}"
-      button type="submit" Add
+        button type="submit" data-action="add-movie" Add

lib/librarix/views/search.slim

@@ -1,10 +1,8 @@
 - content_for(:title) { 'Search' }
 
-form method="get" action="/search"
-  input type="text" name="search" value="#{params['search']}"
-  input type="submit"
+form method="get" action="/search" id="search"
+  input type="text" name="search" value="#{params['search']}" autocomplete="off" autofocus="on"
+  input type="submit" value="Search"
 
-ul
-  - movies.each do |movie|
-    li
-      == slim :movie, locals: {movie: movie}
+div
+  == slim :list, locals: {movies: movies}