From b1b3a9feb663755ba513a6351625af04bfd4eafd Mon Sep 17 00:00:00 2001
From: Daniel Supernault <danielsupernault@gmail.com>
Date: Thu, 7 Feb 2019 12:07:47 -0700
Subject: [PATCH] Add embed.js

---
 resources/assets/js/embed.js | 65 ++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 resources/assets/js/embed.js

diff --git a/resources/assets/js/embed.js b/resources/assets/js/embed.js
new file mode 100644
index 000000000..314917d51
--- /dev/null
+++ b/resources/assets/js/embed.js
@@ -0,0 +1,65 @@
+window.pixlfed = {};
+window.pixlfed.config = {
+	domain: process.env.MIX_APP_DOMAIN,
+}
+
+pixlfed.autoSizeIFrame = function(el) {
+	console.log(el.contentDocument);
+	el.style.height = el.contentDocument.body.scrollHeight +'px';
+}
+
+pixlfed.polyfill = function() {
+	[].forEach.call(document.querySelectorAll('div.pixelfed-embed'), function(el) {
+		pixlfed.loadIFrame(el);
+	});
+}
+
+pixlfed.loadIFrame = function(el) {
+	let permalink = el.getAttribute('data-pixlfed-permalink');
+	let parser = document.createElement('a');
+	parser.href = permalink;
+	if(el.getAttribute('loaded') == 'true') {
+		return;
+	}
+	if(pixlfed.config.domain !== parser.host) {
+		el.setAttribute('loaded', 'true');
+		console.error('Invalid embed permalink')
+		return;
+	}
+	let css = 'background: white; max-width: 540px; width: calc(100% - 2px); border-radius: 3px; border: 1px solid rgb(219, 219, 219); box-shadow: none; display: block; margin: 0px 0px 12px; min-width: 326px; padding: 0px;';
+	let iframe = document.createElement('iframe');
+	iframe.onload = function() {
+		pixlfed.autoSizeIFrame(iframe);
+	}
+	iframe.setAttribute('allowtransparency', 'true');
+	iframe.setAttribute('frameborder', '0');
+	iframe.setAttribute('scrolling', 'no');
+	iframe.setAttribute('src', permalink);
+	iframe.setAttribute('style', css);
+	iframe.setAttribute('loaded', 'true');
+	el.replaceWith(iframe);
+}
+
+pixlfed.run = function() {
+	var lazyFrames = [].slice.call(document.querySelectorAll("div.pixelfed-embed"));
+
+	if ("IntersectionObserver" in window) {
+	let lazyFrameObserver = new IntersectionObserver(function(entries, observer) {
+	  entries.forEach(function(entry) {
+	    if (entry.isIntersecting) {
+	      if(entry.target.getAttribute('loaded') !== 'true') {
+	      	pixlfed.loadIFrame(entry.target);
+	      }
+	    }
+	  });
+	});
+
+	lazyFrames.forEach(function(lazyFrame) {
+	  lazyFrameObserver.observe(lazyFrame);
+	});
+	} else {
+		pixlfed.polyfill();
+	}
+}
+
+pixlfed.run();
\ No newline at end of file