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/*
* 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);
})});
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