[Core] New feature : User Interface to "Detect" Feed from an URL (#3436)

* [Core] New feature : User Interface to "Detect" Feed from an URL

Detect Action has been expanded to support returning a Feed in a JSON
format instead of a Redirect. Existing usage of the Detect action will
keep working as usual.

Frontpage template has now a section to display the Feed detection
result, and a button to start the Feed Detection.

A new JS file contains the necessary JS (Ajax and Event management) to
fill the Feed Detection section.

* Coding policy fixes

* [Core] New feature : User Interface to "Detect" Feed from an URL

- Switch from old school XMLHttpRequest to fetch
- Enhance UX of search results
- Revert to it's original content
- Switch to a new Action : FindfeedAction.php
- Switch to template literals instead of string concatenation
- FindFeed action could retrun multiple feeds
- Results are sent with an absolute URL
- Switch to Json::encode() helper function

* [Core] New feature : User Interface to "Detect" Feed from an URL

- Move specific JS code to rss-bridge.js
- Change HTML tag for the button to have a consistant style with th rest
  of the page

* [Core] New feature : User Interface to "Detect" Feed from an URL

- If no context is sent, assume there is only one unnamed context
- Find parameter name in global and currect context

* fix

* remove typo

---------

Co-authored-by: Dag <me@dvikan.no>
This commit is contained in:
sysadminstory 2023-08-22 20:44:36 +02:00 committed by GitHub
parent 54045be951
commit 7591b10219
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4 changed files with 212 additions and 0 deletions

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@ -0,0 +1,89 @@
<?php
/**
* This action is used by the frontpage form search.
* It finds a bridge based off of a user input url.
* It uses bridges' detectParameters implementation.
*/
class FindfeedAction implements ActionInterface
{
public function execute(array $request)
{
$targetURL = $request['url'] ?? null;
$format = $request['format'] ?? null;
if (!$targetURL) {
return new Response('You must specify a url', 400);
}
if (!$format) {
return new Response('You must specify a format', 400);
}
$bridgeFactory = new BridgeFactory();
$results = [];
foreach ($bridgeFactory->getBridgeClassNames() as $bridgeClassName) {
if (!$bridgeFactory->isEnabled($bridgeClassName)) {
continue;
}
$bridge = $bridgeFactory->create($bridgeClassName);
$bridgeParams = $bridge->detectParameters($targetURL);
if ($bridgeParams === null) {
continue;
}
// It's allowed to have no 'context' in a bridge (only a default context without any name)
// In this case, the reference to the parameters are found in the first element of the PARAMETERS array
$context = $bridgeParams['context'] ?? 0;
$bridgeData = [];
// Construct the array of parameters
foreach ($bridgeParams as $key => $value) {
// 'context' is a special case : it's a bridge parameters, there is no "name" for this parameter
if ($key == 'context') {
$bridgeData[$key]['name'] = 'Context';
$bridgeData[$key]['value'] = $value;
} else {
$bridgeData[$key]['name'] = $this->getParameterName($bridge, $context, $key);
$bridgeData[$key]['value'] = $value;
}
}
$bridgeParams['bridge'] = $bridgeClassName;
$bridgeParams['format'] = $format;
$content = [
'url' => get_home_page_url() . '?action=display&' . http_build_query($bridgeParams),
'bridgeParams' => $bridgeParams,
'bridgeData' => $bridgeData,
'bridgeMeta' => [
'name' => $bridge::NAME,
'description' => $bridge::DESCRIPTION,
'parameters' => $bridge::PARAMETERS,
'icon' => $bridge->getIcon(),
],
];
$results[] = $content;
}
if ($results === []) {
return new Response(Json::encode(['message' => 'No bridge found for given url']), 404, ['content-type' => 'application/json']);
}
return new Response(Json::encode($results), 200, ['content-type' => 'application/json']);
}
// Get parameter name in the actual context, or in the global parameter
private function getParameterName($bridge, $context, $key)
{
if (isset($bridge::PARAMETERS[$context][$key]['name'])) {
$name = $bridge::PARAMETERS[$context][$key]['name'];
} else if (isset($bridge::PARAMETERS['global'][$key]['name'])) {
$name = $bridge::PARAMETERS['global'][$key]['name'];
} else {
$name = 'Variable "' . $key . '" (No name provided)';
}
return $name;
}
}

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@ -47,3 +47,82 @@ function rssbridge_toggle_bridge(){
bridge.getElementsByClassName('showmore-box')[0].checked = true;
}
}
var rssbridge_feed_finder = (function() {
/*
* Code for "Find feed by URL" feature
*/
// Start the Feed search
async function rssbridge_feed_search(event) {
const input = document.getElementById('searchfield');
let content = input.value;
if (content) {
const findfeedresults = document.getElementById('findfeedresults');
findfeedresults.innerHTML = 'Searching for matching feeds ...';
let baseurl = window.location.protocol + window.location.pathname;
let url = baseurl + '?action=findfeed&format=Html&url=' + content;
const response = await fetch(url);
if (response.ok) {
const data = await response.json();
rss_bridge_feed_display_found_feed(data);
} else {
rss_bridge_feed_display_feed_search_fail();
}
} else {
rss_bridge_feed_display_find_feed_empty();
}
}
// Display the found feeds
function rss_bridge_feed_display_found_feed(obj) {
const findfeedresults = document.getElementById('findfeedresults');
let content = 'Found Feed(s) :';
// Let's go throug every Feed found
for (const element of obj) {
content += `<div class="search-result">
<div class="icon">
<img src="${element.bridgeMeta.icon}" width="60" />
</div>
<div class="content">
<h2><a href="${element.url}">${element.bridgeMeta.name}</a></h2>
<p>
<span class="description"><a href="${element.url}">${element.bridgeMeta.description}</a></span>
</p>
<div>
<ul>`;
// Now display every Feed parameter
for (const param in element.bridgeData) {
content += `<li>${element.bridgeData[param].name} : ${element.bridgeData[param].value}</li>`;
}
content += `</div>
</div>
</div>`;
}
content += '<p><div class="alert alert-info" role="alert">This feed may be only one of the possible feeds. You may find more feeds using one of the bridges with different parameters, for example.</div></p>';
findfeedresults.innerHTML = content;
}
// Display an error if no feed were found
function rss_bridge_feed_display_feed_search_fail() {
const findfeedresults = document.getElementById('findfeedresults');
findfeedresults.innerHTML = 'No Feed found !<div class="alert alert-info" role="alert">Not every bridge supports feed detection. You can check below within the bridge parameters to create a feed.</div>';
}
// Empty the Found Feed section
function rss_bridge_feed_display_find_feed_empty() {
const findfeedresults = document.getElementById('findfeedresults');
findfeedresults.innerHTML = '';
}
// Add Event to 'Detect Feed" button
var rssbridge_feed_finder = function() {
const button = document.getElementById('findfeed');
button.addEventListener("click", rssbridge_feed_search);
button.addEventListener("keyup", rssbridge_feed_search);
};
return rssbridge_feed_finder;
}());

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@ -453,3 +453,38 @@ button {
color: #d8d3cb;
}
}
/* find-feed */
.search-result {
background-color: #f0f0f0;
border-radius: 5px;
padding: 15px;
display: flex;
position: relative;
text-align: left;
}
@media (prefers-color-scheme: dark) {
.search-result {
background-color: #202325;
}
}
.search-result h2 {
color: #288cfc;
}
.search-result a {
text-decoration: none;
color: #248afa;
}
.search-result .icon {
margin: 0 15px 0 0;
}
.search-result span {
margin-right: 10px;
}
.search-result .description {
font-size: 110%;
margin-right: 0 !important;
margin-top: 5px !important;
}
/* end find-feed */

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@ -2,6 +2,7 @@
<script>
document.addEventListener('DOMContentLoaded', rssbridge_toggle_bridge);
document.addEventListener('DOMContentLoaded', rssbridge_list_search);
document.addEventListener('DOMContentLoaded', rssbridge_feed_finder);
</script>
<section class="searchbar">
@ -15,6 +16,14 @@
onkeyup="rssbridge_list_search()"
value=""
>
<button
type="button"
id="findfeed"
name="findfeed"
/>Find Feed from URL</button>
<section id="findfeedresults">
</section>
</section>
<?= raw($bridges) ?>