1 files changed, 140 insertions, 0 deletions
diff --git a/haunt/static/js/webmention.js b/haunt/static/js/webmention.js
new file mode 100644
index 0000000..d1bb8e8
--- /dev/null
+++ b/haunt/static/js/webmention.js
@@ -0,0 +1,140 @@
+/*
+ * webmention.js -- Fetch and display mentions from webmention.io.
+ * Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.lonestar.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+function buildApiUri() {
+  const snip = /https?:\/\/.*?\//.exec(window.location.href);
+  const page = window.location.href.substring(snip[0].length);
+
+  // TODO: Build up from aliases, etc.
+  const aliases = [page];
+
+  return Array.concat(
+    ["https://webmention.io/api/mentions.jf2?"],
+    aliases.flatMap((alias) => {
+      const ref = "jakob.space";
+      return [
+        `target[]=http://${ref}/${alias}`,
+        `target[]=https://${ref}/${alias}`
+      ];
+    }).join("&")
+  ).join("");
+}
+
+function getData(url, callback) {
+  if (fetch) {
+    fetch(url).then(function(response) {
+      if (response.status >= 200 && response.status < 300) {
+        return Promise.resolve(response);
+      } else {
+        return Promise.reject(new Error(`Request failed: ${response.statusText}`));
+      }
+    }).then(function(response) {
+      return response.json();
+    }).then(callback);
+  } else {
+    let xhr = new XMLHttpRequest();
+    xhr.onload = function(data) {
+      callback(JSON.parse(data));
+    }
+    xhr.onerror = function(error) {
+      throw new Error(`Request failed: ${error}`);
+    }
+  }
+}
+
+function makeComment(comment) {
+  const strip = (uri) => {
+    const sep = "://";
+    return uri.substring(uri.indexOf(sep) + sep.length);
+  };
+
+  const element = (type, attributes) => {
+    let res = document.createElement(type);
+    for (const attribute in attributes) {
+      res.setAttribute(attribute, attributes[attribute]);
+    }
+    return res;
+  };
+
+  // Create the h-card section.
+  let avatar = element("img", {
+    "class": "u-photo",
+    "src": comment.author.photo
+  });
+
+  let authorName = element("a", {
+    "class": "p-name u-url",
+    "href": comment.author.url
+  });
+  authorName.textContent = comment.author.name;
+
+  let authorURI = element("a", {
+    "class": "author_url",
+    "href": comment.author.url
+  });
+  authorURI.textContent = strip(comment.author.url);
+
+  let hCardContainer = element("div", {
+    "class": "p-author h-card author"
+  });
+  hCardContainer.appendChild(avatar);
+  hCardContainer.appendChild(authorName);
+  hCardContainer.appendChild(authorURI);
+
+  // Create the content section.
+  let contentContainer = element("div", {
+    "class": "e-content p-name comment-content",
+  });
+  contentContainer.textContent = comment.content.text;
+
+  // Create the metaline section.
+  let time = element("time", {
+    "class": "dt-published",
+    "datetime": comment.published
+  });
+  time.textContent = (new Date(comment.published)).toString();
+
+  let linkBack = element("a", {
+    "class": "u-url",
+    "href": comment.url
+  });
+  linkBack.appendChild(time);
+
+  let metalineContainer = element("div", {
+    "class": "metaline"
+  });
+  metalineContainer.appendChild(linkBack);
+
+  // Put it all together.
+  let wrapper = element("li", {
+    "class": "p-comment h-cite comment",
+  });
+  wrapper.appendChild(hCardContainer);
+  wrapper.appendChild(contentContainer);
+  wrapper.appendChild(metalineContainer);
+
+  return wrapper;
+}
+
+getData(buildApiUri(), (json) => {
+  json.children
+    .map(makeComment)
+    .forEach((elem) => {
+      document.getElementById("webmention-container").appendChild(elem);
+    })});