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/*
* webmention.js -- Fetch and display mentions from webmention.io.
* Copyright © 2019 - 2020 Jakob L. Kreuze <zerodaysfordays@sdf.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 ref = "jakob.space";
const slug = /[^\/]*(?=\.html)/.exec(window.location.href);
const endpoints = [
`http://${ref}/${slug}.html`,
`https://${ref}/${slug}.html`,
`http://${ref}/blog/${slug}.html`,
`https://${ref}/blog/${slug}.html`,
];
return ["https://webmention.io/api/mentions.jf2?"].concat(
endpoints.map((endpoint) => {
return `target[]=${endpoint}`;
}).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.url.startsWith("https://lobste.rs/")
? "/static/image/lobsters.png"
: comment.author.photo || "/static/image/default-icon.png"
});
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",
});
if (comment.hasOwnProperty("content")) {
contentContainer.textContent = comment.content.text;
} else {
let em = element("em", {});
if (comment.hasOwnProperty("wm-property")) {
if ("repost-of" === comment["wm-property"]) {
em.textContent = "Reposted this!";
} else if ("like-of" === comment["wm-property"]) {
em.textContent = "Favorited this!";
} else {
em.textContent = "No text provided :(";
}
} else {
em.textContent = "No text provided :(";
}
contentContainer.appendChild(em);
}
// Create the metaline section.
let pubTime = comment.published || comment["wm-received"];
let time = element("time", {
"class": "dt-published",
"datetime": pubTime,
});
time.textContent = (new Date(pubTime)).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);
})});
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