From c5f39ea2cd7cf02246705ea8872d3b350526165c Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Fri, 24 May 2024 09:05:42 -0400
Subject: initial

---
 src/web/helpers/image.php | 94 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/web/helpers/image.php

(limited to 'src/web/helpers/image.php')

diff --git a/src/web/helpers/image.php b/src/web/helpers/image.php
new file mode 100644
index 0000000..c18154a
--- /dev/null
+++ b/src/web/helpers/image.php
@@ -0,0 +1,94 @@
+<?php /* Copyright (c) 2024 Freya Murphy */
+
+function __get_mime($type) {
+	switch ($type) {
+		case 'mp4':
+			return 'video/mp4';
+		case 'webm':
+			return 'video/webm';
+		case 'gif':
+			return 'image/gif';
+		case 'png':
+			return 'image/png';
+		case 'jpg':
+			return 'image/jpeg';
+		case 'webp':
+			return 'image/webp';
+		default:
+			return NULL;
+	}
+}
+
+function __make_source(
+	$name,
+	$format,
+	$media
+) {
+	if ($media) {
+		$media = "media=\"$media\"";
+	} else {
+		$media = '';
+	}
+	$main = $GLOBALS['main_model'];
+	$path = $main->get_url('public/' . $name . '.' . $format);
+	$mime = __get_mime($format);
+	return sprintf('<source type="%s" srcset="%s" %s>',
+		$mime, $path, $media);
+}
+
+function image(
+	$name,
+	$alt,
+	$formats = array('webp', 'png'),
+	$animated = FALSE,
+	$attrs = array(),
+
+	$height = NULL,
+	$width = NULL,
+	$size = NULL,
+) :string {
+
+	if ($animated === TRUE) {
+		$animated = array('gif');
+	}
+
+	if (!$animated) {
+		$animated = array();
+	}
+
+	$out = "<picture>";
+
+	foreach ($formats as $format) {
+		$media = count($animated) ? '(prefers-reduced-motion: reduce)' : NULL;
+		$out .= __make_source($name, $format, $media);
+	}
+
+	foreach ($animated as $format) {
+		$out .= __make_source($name, $format, NULL);
+	}
+
+	$format = end($formats);
+	$main = $GLOBALS['main_model'];
+	$path = $main->get_url('public/' . $name . '.' . $format);
+	$out .= "<img src=\"$path\"";
+	if ($alt) {
+		$alt = lang($alt);
+		$attrs['alt'] = $alt;
+	}
+	if ($width) {
+		$attrs['width'] = $width;
+	}
+	if ($height) {
+		$attrs['height'] = $height;
+	}
+	if ($size) {
+		$attrs['width'] = $size;
+		$attrs['height'] = $size;
+	}
+	foreach ($attrs as $key => $value) {
+		$out .= " $key=\"$value\"";
+	}
+	$out .= '></picture>';
+
+	return $out;
+}
-- 
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