From b7ed911abaaaa61ef1d100b7fb712bcf2841b63b Mon Sep 17 00:00:00 2001
From: earnest ma <me@earne.link>
Date: Fri, 5 Feb 2021 16:55:57 -0500
Subject: [PATCH] feat: Add support for comments from Mastodon posts (API)

Can be replied to from the Fediverse/ any ActivityPub-compatible instance.
---
 assets/main.css                     | 614 +++++++++++++++-------------
 layouts/blog/single.html            |   7 +-
 layouts/partials/fedi-comments.html |  74 ++++
 3 files changed, 402 insertions(+), 293 deletions(-)
 create mode 100644 layouts/partials/fedi-comments.html

diff --git a/assets/main.css b/assets/main.css
index 251757a..7d3869d 100644
--- a/assets/main.css
+++ b/assets/main.css
@@ -1,7 +1,6 @@
 /* Adapted from Simple CSS (MIT License): https://simplecss.org/ */
 /* Set the global variables for everything. Change these to use your own fonts/colours. */
 :root {
-
 	/* Set sans-serif & mono fonts */
 	--sans-font: -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir, "Nimbus Sans L", Roboto, Noto, "Segoe UI", Arial, Helvetica, "Helvetica Neue", sans-serif;
 	--mono-font: Consolas, Menlo, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
@@ -24,429 +23,466 @@
 	--accent: #bd93f9;
 	--accent-light: #bd93f9;
 	--code: #ff79c6;
-	--preformatted: #CCC;
+	--preformatted: #ccc;
 	--marked: #f1fa8c;
-  }
+}
 
-  /* Dark theme */
-  img, video {
-	  opacity: .6;
-  }
+/* Dark theme */
+img,
+video {
+	opacity: 0.6;
+}
 
-  * {
+* {
 	/* Set the font globally */
 	font-family: var(--sans-font);
-  }
+}
 
-  html {
+html {
 	font-size: 16px;
-  }
+}
 
-  /* Make the body a nice central block */
-  body {
+/* Make the body a nice central block */
+body {
 	color: var(--text);
 	background: var(--bg);
 	font-size: var(--base-fontsize);
 	line-height: var(--line-height);
 	margin: 0;
-  }
+}
 
-  /* Make the main element a nice central block */
-  main {
+/* Make the main element a nice central block */
+main {
 	margin: 1rem auto 0;
 	max-width: 45rem;
-	padding: 0 .5rem;
-  }
+	padding: 0 0.5rem;
+}
 
-  /* Make the header bg full width, but the content inline with body */
-  header {
-	  background: var(--accent-bg);
-	  border-bottom: 1px solid var(--border);
+/* Make the header bg full width, but the content inline with body */
+header {
+	background: var(--accent-bg);
+	border-bottom: 1px solid var(--border);
 	padding: 1.5rem 15rem;
 	margin-bottom: 3rem;
-  }
+}
 
-  /* Reduces header padding on smaller screens */
-  @media only screen and (max-width: 1200px) {
+/* Reduces header padding on smaller screens */
+@media only screen and (max-width: 1200px) {
 	header {
-	  padding: 1rem;
+			padding: 1rem;
 	}
 
 	nav {
-	  text-align: center;
+			text-align: center;
 	}
-  }
+}
 
-  /* Remove margins for header text */
-  header h1,
-  header p {
+/* Remove margins for header text */
+header h1,
+header p {
 	margin: 0;
-  }
+}
 
-  /* Fix header line height when title wraps */
-  header h2 {
+/* Fix header line height when title wraps */
+header h2 {
 	text-align: center;
 	line-height: 1.1;
-  }
+}
 
-  /* Format navigation */
-  nav {
+/* Format navigation */
+nav {
 	font-size: 1rem;
 	line-height: 2;
 	padding: 1rem 0;
-  }
+}
 
-  nav a {
+nav a {
 	margin: 1rem 1rem 0 0;
 	border: 1px solid var(--border);
 	border-radius: 5px;
 	color: var(--text) !important;
 	display: inline-block;
-	padding: .1rem 1rem;
+	padding: 0.1rem 1rem;
 	text-decoration: none;
-	transition: .4s;
-  }
+	transition: 0.4s;
+}
 
-  nav a:hover {
+nav a:hover {
 	color: var(--accent) !important;
 	border-color: var(--accent);
-  }
+}
 
-  nav a.current:hover {
+nav a.current:hover {
 	text-decoration: none;
-  }
+}
 
-  footer {
+footer {
 	margin-top: 4rem;
 	padding: 2rem 1rem 1.5rem 1rem;
 	color: var(--text-light);
-	font-size: .9rem;
+	font-size: 0.9rem;
 	text-align: center;
 	border-top: 1px solid var(--border);
-  }
+}
 
-  /* Format headers */
-  h1 {
+/* Format headers */
+h1 {
 	font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale) * var(--header-scale) * var(--header-scale));
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  h2 {
+h2 {
 	font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale) * var(--header-scale));
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  h3 {
+h3 {
 	font-size: calc(var(--base-fontsize) * var(--header-scale) * var(--header-scale));
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  h4 {
+h4 {
 	font-size: calc(var(--base-fontsize) * var(--header-scale));
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  h5 {
+h5 {
 	font-size: var(--base-fontsize);
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  h6 {
+h6 {
 	font-size: calc(var(--base-fontsize) / var(--header-scale));
 	margin-top: calc(var(--line-height) * 1.5rem);
-  }
+}
 
-  /* Format links & buttons */
-  a,
-  a:visited {
+/* Format links & buttons */
+a,
+a:visited {
 	color: var(--accent);
-  }
+}
 
-  a:hover {
+a:hover {
 	text-decoration: none;
-  }
+}
 
-  a button,
-  button,
-  input[type="submit"],
-  input[type="reset"],
-  input[type="button"] {
+a button,
+button,
+input[type="submit"],
+input[type="reset"],
+input[type="button"] {
 	border: none;
 	border-radius: 5px;
 	background: var(--accent);
 	font-size: 1rem;
 	color: var(--bg);
-	padding: .7rem .9rem;
-	margin: .5rem 0;
-	transition: .4s;
-  }
+	padding: 0.7rem 0.9rem;
+	margin: 0.5rem 0;
+	transition: 0.4s;
+}
 
-  a button[disabled],
-  button[disabled],
-  input[type="submit"][disabled],
-  input[type="reset"][disabled],
-  input[type="button"][disabled] {
-	  cursor: default;
-	  opacity: .5;
-	  cursor: not-allowed;
-  }
+a button[disabled],
+button[disabled],
+input[type="submit"][disabled],
+input[type="reset"][disabled],
+input[type="button"][disabled] {
+	cursor: default;
+	opacity: 0.5;
+	cursor: not-allowed;
+}
 
-  /* Set the cursor to '?' while hovering over an abbreviation */
-  abbr {
-	  cursor: help;
-  }
+/* Set the cursor to '?' while hovering over an abbreviation */
+abbr {
+	cursor: help;
+}
 
-  button:focus,
-  button:enabled:hover,
-  input[type="submit"]:focus,
-  input[type="submit"]:enabled:hover,
-  input[type="reset"]:focus,
-  input[type="reset"]:enabled:hover,
-  input[type="button"]:focus,
-  input[type="button"]:enabled:hover {
-	  opacity: .8;
-  }
+button:focus,
+button:enabled:hover,
+input[type="submit"]:focus,
+input[type="submit"]:enabled:hover,
+input[type="reset"]:focus,
+input[type="reset"]:enabled:hover,
+input[type="button"]:focus,
+input[type="button"]:enabled:hover {
+	opacity: 0.8;
+}
 
-  /* Format the expanding box */
-  details {
-	  padding: .6rem 1rem;
-	  background: var(--accent-bg);
-	  border: 1px solid var(--border);
-	  border-radius: 5px;
+/* Format the expanding box */
+details {
+	padding: 0.6rem 1rem;
+	background: var(--accent-bg);
+	border: 1px solid var(--border);
+	border-radius: 5px;
 	margin-bottom: 1rem;
-  }
+}
 
-  summary {
-	  cursor: pointer;
-	  font-weight: bold;
-  }
-
-  details[open] {
-	  padding-bottom: .75rem;
-  }
-
-  details[open] summary {
-	  margin-bottom: .5rem;
-  }
-
-  details[open]>*:last-child {
-	  margin-bottom: 0;
-  }
-
-  /* Format tables */
-  table {
-	  border-collapse: collapse;
-	  width: 100%
-  }
-
-  td,
-  th {
-	  border: 1px solid var(--border);
-	  text-align: left;
-	  padding: .5rem;
-  }
-
-  th {
-	  background: var(--accent-bg);
+summary {
+	cursor: pointer;
 	font-weight: bold;
-  }
+}
 
-  tr:nth-child(even) {
-	  /* Set every other cell slightly darker. Improves readability. */
-	  background: var(--accent-bg);
-  }
+details[open] {
+	padding-bottom: 0.75rem;
+}
 
-  table caption {
-	  font-weight: bold;
-	  margin-bottom: .5rem;
-  }
+details[open] summary {
+	margin-bottom: 0.5rem;
+}
 
-  /* Lists */
-  ol,
-  ul {
-	  padding-left: 3rem;
-  }
+details[open] > *:last-child {
+	margin-bottom: 0;
+}
 
-  /* Format forms */
-  textarea,
-  select,
-  input {
+/* Format tables */
+table {
+	border-collapse: collapse;
+	width: 100%;
+}
+
+td,
+th {
+	border: 1px solid var(--border);
+	text-align: left;
+	padding: 0.5rem;
+}
+
+th {
+	background: var(--accent-bg);
+	font-weight: bold;
+}
+
+tr:nth-child(even) {
+	/* Set every other cell slightly darker. Improves readability. */
+	background: var(--accent-bg);
+}
+
+table caption {
+	font-weight: bold;
+	margin-bottom: 0.5rem;
+}
+
+/* Lists */
+ol,
+ul {
+	padding-left: 3rem;
+}
+
+/* Format forms */
+textarea,
+select,
+input {
 	font-size: inherit;
 	font-family: inherit;
-	  padding: .5rem;
-	  margin-bottom: .5rem;
+	padding: 0.5rem;
+	margin-bottom: 0.5rem;
 	color: var(--text);
-	  background: var(--bg);
-	  border: 1px solid var(--border);
-	  border-radius: 5px;
-	  box-shadow: none;
-	  box-sizing: border-box;
+	background: var(--bg);
+	border: 1px solid var(--border);
+	border-radius: 5px;
+	box-shadow: none;
+	box-sizing: border-box;
 	width: 60%;
-  }
+}
 
-  /* Make the textarea wider than other inputs */
-  textarea {
-	width: 80%
-  }
+/* Make the textarea wider than other inputs */
+textarea {
+	width: 80%;
+}
 
-  /* Makes input fields wider on smaller screens */
-  @media only screen and (max-width: 720px) {
+/* Makes input fields wider on smaller screens */
+@media only screen and (max-width: 720px) {
 	textarea,
 	select,
 	input {
-	  width: 100%;
+			width: 100%;
 	}
-  }
+}
 
-  /* Ensures the checkbox and radio inputs do not have a set width like other input fields */
-  input[type="checkbox"], input[type="radio"]{
+/* Ensures the checkbox and radio inputs do not have a set width like other input fields */
+input[type="checkbox"],
+input[type="radio"] {
 	width: auto;
-  }
+}
 
-  /* do not show border around file selector button */
-  input[type="file"] {
+/* do not show border around file selector button */
+input[type="file"] {
 	border: 0;
-  }
+}
 
-  /* Without this any HTML using <fieldset> shows ugly borders and has additional padding/margin. (Issue #3) */
-  fieldset {
+/* Without this any HTML using <fieldset> shows ugly borders and has additional padding/margin. (Issue #3) */
+fieldset {
 	border: 0;
 	padding: 0;
 	margin: 0;
-  }
+}
 
-  /* Misc body elements */
+/* Misc body elements */
 
-  hr {
-	  color: var(--border);
+hr {
+	color: var(--border);
 	border-top: 1px;
-	  margin: 1rem auto;
-  }
+	margin: 1rem auto;
+}
 
-  mark {
-	  padding: 2px 5px;
-	  border-radius: 4px;
-	  background: var(--marked);
-  }
+mark {
+	padding: 2px 5px;
+	border-radius: 4px;
+	background: var(--marked);
+}
 
-  main img, main video {
+main img,
+main video {
 	max-width: 100%;
 	border-radius: 5px;
-  }
+}
 
-  figure {
+figure {
 	margin: 0;
-  }
+}
 
-  figcaption {
-	font-size: .9rem;
+figcaption {
+	font-size: 0.9rem;
 	color: var(--text-light);
 	text-align: center;
 	margin-bottom: 1rem;
-  }
+}
 
-  blockquote {
+blockquote {
 	margin: 2rem 0 2rem 2rem;
-	padding: .4rem .8rem;
-	  border-left: .35rem solid var(--accent);
-	  opacity: .8;
-	  font-style: italic;
-  }
+	padding: 0.4rem 0.8rem;
+	border-left: 0.35rem solid var(--accent);
+	opacity: 0.8;
+	font-style: italic;
+}
 
-  cite {
+cite {
 	font-size: 0.9rem;
 	color: var(--text-light);
 	font-style: normal;
-  }
+}
 
-  /* Use mono font for code like elements */
-  code,
-  pre,
-  kbd,
-  samp {
-	  font-size: 1.075rem;
-	  font-family: var(--mono-font);
-	  color: var(--code);
-  }
+/* Use mono font for code like elements */
+code,
+pre,
+kbd,
+samp {
+	font-size: 1.075rem;
+	font-family: var(--mono-font);
+	color: var(--code);
+}
 
-  kbd {
-	  color: var(--preformatted);
-	  border: 1px solid var(--preformatted);
-	  border-bottom: 3px solid var(--preformatted);
-	  border-radius: 5px;
-	  padding: .1rem;
-  }
+kbd {
+	color: var(--preformatted);
+	border: 1px solid var(--preformatted);
+	border-bottom: 3px solid var(--preformatted);
+	border-radius: 5px;
+	padding: 0.1rem;
+}
 
-  pre {
-	  padding: 1rem 1.4rem;
-	  max-width: 100%;
-	  overflow: auto;
-	  color: var(--preformatted);
-	  background: var(--accent-bg);
-	  border: 1px solid var(--border);
-	  border-radius: 5px;
-  }
+pre {
+	padding: 1rem 1.4rem;
+	max-width: 100%;
+	overflow: auto;
+	color: var(--preformatted);
+	background: var(--accent-bg);
+	border: 1px solid var(--border);
+	border-radius: 5px;
+}
 
-  /* Fix embedded code within pre */
-  pre code {
-	  color: var(--preformatted);
-	  background: none;
-	  margin: 0;
-	  padding: 0;
-  }
+/* Fix embedded code within pre */
+pre code {
+	color: var(--preformatted);
+	background: none;
+	margin: 0;
+	padding: 0;
+}
 
-  /* CSS for Openring */
-  .webring {
-    margin-top: 2rem;
+/* CSS for Openring */
+.webring {
+	margin-top: 2rem;
+}
+
+.wr-articles {
+	display: flex;
+
+	@media (max-width: 640px) {
+			flex-direction: column;
 	}
+}
 
-    .wr-articles {
-      display: flex;
+.wr-article {
+	flex: 1 1 0;
+	display: flex;
+	flex-direction: column;
+	background: #323542;
+	padding: 0.5rem;
 
-      @media(max-width: 640px) {
-        flex-direction: column;
-      }
-    }
+	margin: 0 0.5rem;
 
-    .wr-article {
-      flex: 1 1 0;
-      display: flex;
-      flex-direction: column;
-      background: #323542;
-      padding: 0.5rem;
-
-      margin: 0 0.5rem;
-
-      @media(max-width: 640px) {
-        margin: 0.5rem 0;
-      }
-    }
-
-    .wr-article:first-child {
-      margin-left: 0;
-    }
-
-    .wr-article:last-child {
-      margin-right: 0;
-    }
-
-    .wr-summary {
-      font-size: 0.8rem;
-      flex: 1 1 0;
-      color: rgb(235, 235, 235);
-    }
-
-    .wr-attribution {
-      float: right;
-      font-size: 0.8rem;
-      color: rgb(192, 191, 191);
-      line-height: 3;
-    }
-
-    .wr-date {
-      color: rgb(192, 191, 191);
-    }
-
-    .wr-source {
-      color: rgb(192, 191, 191);
+	@media (max-width: 640px) {
+			margin: 0.5rem 0;
 	}
+}
+
+.wr-article:first-child {
+	margin-left: 0;
+}
+
+.wr-article:last-child {
+	margin-right: 0;
+}
+
+.wr-summary {
+	font-size: 0.8rem;
+	flex: 1 1 0;
+	color: rgb(235, 235, 235);
+}
+
+.wr-attribution {
+	float: right;
+	font-size: 0.8rem;
+	color: rgb(192, 191, 191);
+	line-height: 3;
+}
+
+.wr-date {
+	color: rgb(192, 191, 191);
+}
+
+.wr-source {
+	color: rgb(192, 191, 191);
+}
+
+.mastodon-comment {
+	background-color: var(--body-background);
+	border-radius: var(--card-border-radius);
+	padding: var(--card-padding);
+	margin-bottom: 1rem;
+	display: flex;
+}
+
+.mastodon-comment .content {
+	flex-grow: 2;
+}
+
+.mastodon-comment .avatar img {
+	margin-right: 1rem;
+	min-width: 60px;
+}
+
+.mastodon-comment .author {
+	padding-top: 0;
+	display: flex;
+}
+
+.mastodon-comment .author .date {
+	margin-left: auto;
+}
+
+.mastodon-comment .disabled {
+	color: var(--accent-color);
+}
+
+.mastodon-comment-content p:first-child {
+	margin-top: 0;
+}
diff --git a/layouts/blog/single.html b/layouts/blog/single.html
index 2432bb2..7135707 100644
--- a/layouts/blog/single.html
+++ b/layouts/blog/single.html
@@ -28,13 +28,12 @@
 	{{ end }}
 </p>
 
-
-<a href="#"><button class="top">Back to top</button></a>
-<!--<a href="sc"><button class="top">Load comments (Mastodon)</button></a>-->
-
+{{ partial "fedi-comments" . }}
 
 {{ if $.Site.Params.openring }}
 {{ partial "openring-out" . -}}
 {{ end }}
 
+<a href="#"><button class="top">Back to top</button></a>
+
 {{ end }}
diff --git a/layouts/partials/fedi-comments.html b/layouts/partials/fedi-comments.html
new file mode 100644
index 0000000..4475ddc
--- /dev/null
+++ b/layouts/partials/fedi-comments.html
@@ -0,0 +1,74 @@
+{{ with .Params.comments }}
+<h3>Comments</h3>
+
+<p>
+	You may <a class="link" href="https://{{ .host }}/@{{ .user }}/{{ .id }}" target="_blank">view</a>
+	or <a class="link" href="https://{{ .host }}/interact/{{ .id }}?type=reply" target="_blank">reply</a>
+	if you have an account anywhere in the Fediverse.
+</p>
+
+<p id="mastodon-comments-list"><button id="load-comment">Load comments</button></p>
+<noscript>
+	<p>
+		You would need JavaScript to view comments here on this page.
+		However, you can still <a class="link" href="https://{{ .host }}/@{{ .user }}/{{ .id }}" target="_blank">view</a>
+		or <a class="link" href="https://{{ .host }}/interact/{{ .id }}?type=reply" target="_blank">reply</a>
+		if you have an account anywhere in the Fediverse.
+	</p>
+</noscript>
+
+<script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/2.2.6/purify.min.js "></script>
+<script type="text/javascript">
+function escapeHtml(unsafe) {
+	return unsafe
+	.replace(/&/g, "&amp;")
+	.replace(/</g, "&lt;")
+	.replace(/>/g, "&gt;")
+	.replace(/"/g, "&quot;")
+	.replace(/'/g, "&#039;");
+	}
+
+document.getElementById("load-comment").addEventListener("click", function() {
+	document.getElementById("load-comment").innerHTML = "Loading... 🚀";
+		fetch('https://{{ .host }}/api/v1/statuses/{{ .id }}/context')
+		.then(function(response) {
+			return response.json();
+		})
+		.then(function(data) {
+			if(data['descendants'] &&
+			Array.isArray(data['descendants']) &&
+			data['descendants'].length > 0) {
+				document.getElementById('mastodon-comments-list').innerHTML = "";
+				data['descendants'].forEach(function(reply) {
+					reply.account.display_name = escapeHtml(reply.account.display_name);
+					reply.account.emojis.forEach(emoji => {
+						reply.account.display_name = reply.account.display_name.replace(`:${emoji.shortcode}:`,
+						`<img src="${escapeHtml(emoji.static_url)}" alt="Emoji ${emoji.shortcode}" height="20" width="20" />`);
+					});
+					mastodonComment =
+					`<div class="mastodon-comment">
+						<div class="avatar">
+							<img src="${escapeHtml(reply.account.avatar_static)}" height=60 width=60 alt="">
+							</div>
+							<div class="content">
+								<div class="author">
+									<a href="${reply.account.url}" rel="nofollow">
+										<span>${reply.account.display_name}</span>
+										<span class="disabled">${escapeHtml(reply.account.acct)}</span>
+										</a>
+										<a class="date" href="${reply.uri}" rel="nofollow">
+											${reply.created_at.substr(0, 10)}
+											</a>
+											</div>
+											<div class="mastodon-comment-content">${reply.content}</div>
+											</div>
+											</div>`;
+											document.getElementById('mastodon-comments-list').appendChild(DOMPurify.sanitize(mastodonComment, {'RETURN_DOM_FRAGMENT': true}));
+										});
+									} else {
+										document.getElementById('mastodon-comments-list').innerHTML = "<p>No comments, add yours?</p>";
+									}
+								});
+								});
+</script>
+{{ end }}