From b1c6afa81c8110aac818786f2beb0eb1cf816f41 Mon Sep 17 00:00:00 2001
From: Emil Miler <em@0x45.cz>
Date: Thu, 8 Feb 2024 13:31:46 +0100
Subject: [PATCH] Add filtering

---
 sass/style.scss      | 16 +++++++++++++---
 static/js/filter.js  | 41 +++++++++++++++++++++++++++++++++++++++++
 templates/index.html | 10 ++++++----
 3 files changed, 60 insertions(+), 7 deletions(-)
 create mode 100644 static/js/filter.js

diff --git a/sass/style.scss b/sass/style.scss
index 1df0e7b..76a0628 100644
--- a/sass/style.scss
+++ b/sass/style.scss
@@ -22,13 +22,15 @@ main.songs {
 	}
 
 	.filters {
-		// `display: grid` is set via JS to prevent displaying the inputs
-		// on browsers wih JavaScript disabled.
-		display: none;
+		display: grid;
 		grid-template-columns: 2fr 1fr 1fr;
 		gap: 1em;
 		margin: 1em 0;
 
+		// This is removed via JS to prevent displaying the inputs
+		// on browsers wih JavaScript disabled.
+		&.hidden { display: none }
+
 		&>* {
 			border: 1px solid #aaa;
 			border-radius: .5em;
@@ -38,6 +40,12 @@ main.songs {
 
 		&>.button {
 			text-align: center;
+			cursor: pointer;
+
+			&.selected {
+				border-color: #333;
+				box-shadow: rgba(0, 0, 0, 0.2) 0 0 10px;
+			}
 		}
 	}
 
@@ -55,6 +63,8 @@ main.songs {
 			box-shadow: rgba(0, 0, 0, 0.2) 0 0 10px;
 			border-left: .7em solid #000;
 
+			&.hidden { display: none }
+
 			&.mixtape { border-color: #654575 }
 			&.classic { border-color: #a55d05 }
 
diff --git a/static/js/filter.js b/static/js/filter.js
new file mode 100644
index 0000000..574c51f
--- /dev/null
+++ b/static/js/filter.js
@@ -0,0 +1,41 @@
+const filters = document.querySelector(".filters");
+const buttons = Array.from(filters.querySelectorAll(".button"));
+const search = document.querySelector("input[type='text']");
+const songList = document.querySelector(".song-list");
+
+let selectedCategory = null;
+
+function buttonToggle(clickedButton) {
+	buttons.forEach(button => {
+		if (button === clickedButton && !button.classList.contains("selected")) {
+			button.classList.add("selected");
+			selectedCategory = button.dataset.category;
+		} else {
+			button.classList.remove("selected");
+			selectedCategory = null;
+		}
+	});
+	filterSongs();
+}
+
+function filterSongs() {
+	const searchTerm = search.value.trim().toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+	const songs = Array.from(songList.children);
+	songs.forEach(song => {
+		const title = song.dataset.title.toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+		const matching = title.includes(searchTerm) && (!selectedCategory || song.dataset.category === selectedCategory);
+		song.classList.toggle("hidden", !matching);
+	});
+}
+
+// Event listeners
+search.addEventListener("keyup", filterSongs);
+buttons.forEach(button => button.addEventListener("click", () => buttonToggle(button)));
+
+// Normalize song titles
+Array.from(songList.children).forEach(song => {
+	song.dataset.title = song.dataset.title.toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+});
+
+// Display the filter section on JS-enabled browsers
+window.addEventListener("load", () => filters.classList.remove = "hidden");
diff --git a/templates/index.html b/templates/index.html
index c82d933..7745953 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -13,12 +13,12 @@
 	<main class="songs">
 		<section class="filters">
 			<input type="text" placeholder="Hledat">
-			<div class="button">classic</div>
-			<div class="button">mixtape</div>
+			<div class="button" data-category="classic">classic</div>
+			<div class="button" data-category="mixtape">mixtape</div>
 		</section>
 		<section class="song-list">
 			{% for song in section.pages %}
-				<div class="{{ macros::primary_category(song=song) }}">
+				<div class="{{ macros::primary_category(song=song) }}" data-title="{{ song.title }}" data-category="{{ macros::primary_category(song=song) }}">
 					<div class="meta">
 						<div class="title">{{ song.title }}</div>
 						{% if song.taxonomies["artist"] %}
@@ -38,6 +38,8 @@
 		</section>
 	</main>
 {% endblock %}
-{% block script %}{% endblock %}
+{% block script %}
+	<script src="{{ get_url(path="/js/filter.js") }}"></script>
+{% endblock %}
 </body>
 </html>