add user rss/atom feeds

13 files changed, 210 insertions, 11 deletions

diff --git a/locale/en_GB.json b/locale/en_GB.json
index 75cf63b..69bf6a1 100644
--- a/locale/en_GB.json
+++ b/locale/en_GB.json
@@ -22,7 +22,10 @@
   "user.profile.avatarReset": "Avatar reset!",
   "user.profile.bio": "Bio",
   "user.profile.notesHidden": "Notes hidden because you block this user",
+  "user.profile.feed.rss": "RSS feed",
+  "user.profile.feed.atom": "Atom feed",
   "user.notes.placeholder": "This user hasn't posted anything yet.",
+  "user.rss.description": "Public notes by %s",
   "timeline.global": "Global timeline",
   "timeline.global.description": "This timeline shows all known public indexable notes.",
   "timeline.global.shortName": "Global",
@@ -105,6 +108,8 @@
   "preferences.timezone.name": "Time zone",
   "preferences.timezone.description": "Preferred time zone, which all dates and times are shown in",
   "preferences.timezone.auto": "Set automatically",
+  "preferences.rssEnabled.name": "Enable RSS and Atom feeds",
+  "preferences.rssEnabled.description": "Provides a feed of your public notes, usable with common feed reader apps and online aggregators",
   "changePassword.heading": "Change password",
   "changePassword.currentPassword": "Current password",
   "changePassword.newPassword": "New password",
diff --git a/misc/__.php b/misc/__.php
index af6366a..e0c09ab 100644
--- a/misc/__.php
+++ b/misc/__.php
@@ -4,4 +4,8 @@ use Digitigrade\Text;
 
 function __(string $key): string {
     return (new Text($key))->__tostring();
+}
+
+function __f(string $key, mixed ...$args): string {
+    return sprintf(__($key), ...$args);
 }
\ No newline at end of file
diff --git a/routes/actor_rss.php b/routes/actor_rss.php
new file mode 100644
index 0000000..67d52ad
--- /dev/null
+++ b/routes/actor_rss.php
@@ -0,0 +1,44 @@
+<?php
+
+use Digitigrade\HttpResponseStatus\Forbidden;
+use Digitigrade\HttpResponseStatus\NotFound;
+use Digitigrade\Model\Actor;
+use Digitigrade\Model\UserAccount;
+use Digitigrade\Router;
+use Digitigrade\Text;
+use Digitigrade\UserSettings;
+
+$checkActorFeedEnabled = function (?Actor $actor) {
+    if ($actor == null || $actor->deleted) {
+        throw new NotFound('there is no actor with that id');
+    }
+    if (!$actor->isLocal) {
+        throw new NotFound('refusing to give you an rss feed for a non-local actor go talk to their home instance');
+    }
+    $user = UserAccount::findByLinkedActor($actor);
+    if ($user == null) {
+        throw new NotFound('im truly discombobulated');
+    }
+    $rssEnabled = (new UserSettings($user))->getBool('profile.rssEnabled');
+    if (!$rssEnabled) {
+        throw new Forbidden('this user has not enabled RSS/Atom feeds for their profile');
+    }
+};
+
+Router::getInstance()->mount('/actor/:id/feed/:lang/feed.rss', function (array $args) use ($checkActorFeedEnabled) {
+    $actor = Actor::find($args['id']);
+    $checkActorFeedEnabled($actor);
+    header('Content-Type: application/rss+xml');
+    Text::setDefaultLanguage($args['lang']);
+    render_template('actor_rss', ['actor' => $actor, 'lang' => $args['lang']]);
+});
+
+Router::getInstance()->mount('/actor/:id/feed/:lang/feed.atom', function (array $args) use ($checkActorFeedEnabled) {
+    $actor = Actor::find($args['id']);
+    $checkActorFeedEnabled($actor);
+    header('Content-Type: application/atom+xml');
+    Text::setDefaultLanguage($args['lang']);
+    render_template('actor_atom', ['actor' => $actor, 'lang' => $args['lang']]);
+});
+
+unset($checkActorFeedEnabled);
diff --git a/routes/preferences.php b/routes/preferences.php
index 243f90d..99b8458 100644
--- a/routes/preferences.php
+++ b/routes/preferences.php
@@ -19,6 +19,7 @@ Router::getInstance()->mount('/fragment/preferences', function (array $args) {
         $user->actor->save();
         $settings->set('interface.smallUnreadIndicators', $_POST['smallIndicators']);
         $settings->set('locale.timezone', $_POST['timezone']);
+        $settings->set('profile.rssEnabled', $_POST['rssEnabled']);
 
         $saved = true;
     }
diff --git a/settings.user.ini b/settings.user.ini
index 7baa633..8725114 100644
--- a/settings.user.ini
+++ b/settings.user.ini
@@ -7,4 +7,8 @@ type = "boolean"
 
 [locale.timezone]
 default = "Europe/London"
-type = "timezone"
\ No newline at end of file
+type = "timezone"
+
+[profile.rssEnabled]
+default = "false"
+type = "boolean"
\ No newline at end of file
diff --git a/static/icons.css b/static/icons.css
index a48a4f4..3d53416 100644
--- a/static/icons.css
+++ b/static/icons.css
@@ -111,4 +111,10 @@
   &.share {
     --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M17 22q-1.25 0-2.125-.875T14 19q0-.15.075-.7L7.05 14.2q-.4.375-.925.588T5 15q-1.25 0-2.125-.875T2 12t.875-2.125T5 9q.6 0 1.125.213t.925.587l7.025-4.1q-.05-.175-.062-.337T14 5q0-1.25.875-2.125T17 2t2.125.875T20 5t-.875 2.125T17 8q-.6 0-1.125-.213T14.95 7.2l-7.025 4.1q.05.175.063.338T8 12t-.012.363t-.063.337l7.025 4.1q.4-.375.925-.587T17 16q1.25 0 2.125.875T20 19t-.875 2.125T17 22'/%3E%3C/svg%3E");
   }
+  &.rss-feed {
+    --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M5 21q-.825 0-1.412-.587T3 19t.588-1.412T5 17t1.413.588T7 19t-.587 1.413T5 21m12 0q0-2.925-1.1-5.462t-3-4.438t-4.437-3T3 7V4q3.55 0 6.625 1.325t5.4 3.65t3.65 5.4T20 21zm-6 0q0-1.675-.625-3.113T8.65 15.35t-2.537-1.725T3 13v-3q2.3 0 4.288.863t3.487 2.362t2.363 3.488T14 21z'/%3E%3C/svg%3E");
+  }
+  &.orbit-outline {
+    --svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M6 21.5q-1.45 0-2.475-1.025T2.5 18t1.025-2.475T6 14.5t2.475 1.025T9.5 18q0 .55-.162 1.063t-.488.962v-.675q.75.325 1.55.488T12 20q3.35 0 5.675-2.325T20 12h2q0 2.075-.788 3.9t-2.137 3.175t-3.175 2.138T12 22q-1.125 0-2.2-.238t-2.075-.712q-.4.225-.837.338T6 21.5m0-2q.625 0 1.063-.437T7.5 18t-.437-1.062T6 16.5t-1.062.438T4.5 18t.438 1.063T6 19.5m6-4q-1.45 0-2.475-1.025T8.5 12t1.025-2.475T12 8.5t2.475 1.025T15.5 12t-1.025 2.475T12 15.5M2 12q0-2.075.788-3.9t2.137-3.175T8.1 2.788T12 2q1.125 0 2.2.238t2.075.712q.4-.225.838-.338T18 2.5q1.45 0 2.475 1.025T21.5 6t-1.025 2.475T18 9.5t-2.475-1.025T14.5 6q0-.55.163-1.062t.487-.963v.675q-.75-.325-1.55-.488T12 4Q8.65 4 6.325 6.325T4 12zm16-4.5q.625 0 1.063-.437T19.5 6t-.437-1.062T18 4.5t-1.062.438T16.5 6t.438 1.063T18 7.5M18 6'/%3E%3C/svg%3E");
+  }
 }
diff --git a/templates/actor_atom.php b/templates/actor_atom.php
new file mode 100644
index 0000000..8bd40fb
--- /dev/null
+++ b/templates/actor_atom.php
@@ -0,0 +1,51 @@
+<?php
+/** @var \Digitigrade\Model\Actor $actor */
+/** @var string $lang */
+
+use Digitigrade\GlobalSettings;
+use Digitigrade\Model\Note;
+use Digitigrade\Model\NotePrivacyScope;
+
+$selfUri = path_to_uri("/actor/$actor->id/feed/$lang/feed.atom");
+$actorPage = path_to_uri("/@/$actor->handle");
+
+echo '<?xml version="1.0" encoding="utf-8"?>';
+?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+    <id><?= $selfUri ?></id>
+    <title>
+        <?= htmlspecialchars($actor->displayName) ?> — <?= GlobalSettings::getInstance()->get('instance.name') ?>
+    </title>
+    <updated><?= Note::findAllWithAuthor($actor, 1)[0]->created->format(DateTime::ATOM) ?></updated>
+    <author>
+        <name><?= htmlspecialchars($actor->displayName) ?></name>
+        <uri><?= $actorPage ?></uri>
+    </author>
+    <link rel="self" href="<?= $selfUri ?>" />
+    <link rel="alternate" type="text/html" href="<?= $actorPage ?>" />
+    <generator version="<?= get_version() ?>">Digitigrade</generator>
+    <?php if (isset($actor->avatar)): ?>
+        <icon><?= $actor->avatar ?></icon>
+    <?php endif; ?>
+    <subtitle><?= __f('user.rss.description', $actor->displayName) ?></subtitle>
+
+    <?php foreach (Note::findAllWithAuthor($actor, limit: 50) as $note): ?>
+        <?php
+        /** @var Note $note */
+        if ($note->privacy->scope != NotePrivacyScope::PUBLIC || $note->inReplyTo != null) {
+            continue;
+        }
+        ?>
+        <entry>
+            <id><?= path_to_uri("/note/$note->id") ?></id>
+            <title><![CDATA[<?= htmlspecialchars(substr($note->plainContent, 0, 50), double_encode: false) ?>]]></title>
+            <updated><?= ($note->modified ?? $note->created)->format(DateTime::ATOM) ?></updated>
+            <link rel="alternate" type="text/html" href="<?= path_to_uri("/@/$actor->handle/note/$note->id") ?>" />
+            <content type="html"><![CDATA[<?= $note->getBestContentAsHtml() ?>]]></content>
+            <?php foreach ($note->attachments as $file): ?>
+                <link rel="enclosure" title="<?= htmlspecialchars($file->description) ?>" type="<?= $file->type ?>"
+                    href="<?= $file->href ?>" />
+            <?php endforeach; ?>
+        </entry>
+    <?php endforeach; ?>
+</feed>
\ No newline at end of file
diff --git a/templates/actor_profile.php b/templates/actor_profile.php
index ca19978..dfb0174 100644
--- a/templates/actor_profile.php
+++ b/templates/actor_profile.php
@@ -1,7 +1,9 @@
 <?php
 use Digitigrade\Model\UserAccount;
+use Digitigrade\UserSettings;
 
 $user = UserAccount::findByCurrentSession();
+$actorUser = UserAccount::findByLinkedActor($actor);
 ?>
 <div class="fullProfile">
     <div class="basicInfo">
@@ -23,11 +25,7 @@ $user = UserAccount::findByCurrentSession();
         </div>
 
         <div class="profileMiniActions">
-            <?php call_template('menu_button', [], function () {
-                global $actor;
-                // i don't know why but `global $user` just straight up doesnt work?
-                $user = UserAccount::findByCurrentSession();
-                ?>
+            <?php call_template('menu_button', [], function () use ($actor, $user, $actorUser) { ?>
                 <?php if (!$actor->isLocal && isset($actor->homepage)): ?>
                     <li>
                         <a href="<?= $actor->homepage ?>" target="_blank">
@@ -36,6 +34,21 @@ $user = UserAccount::findByCurrentSession();
                         </a>
                     </li>
                 <?php endif; ?>
+                <?php if ($actorUser != null && (new UserSettings($actorUser))->getBool('profile.rssEnabled')): ?>
+                    <?php $lang = get_ui_language(); ?>
+                    <li>
+                        <a href="<?= "/actor/$actor->id/feed/$lang/feed.rss" ?>" target="_blank" type="application/rss+xml">
+                            <span class="material-symbols rss-feed"></span>
+                            <span><?= __('user.profile.feed.rss') ?></span>
+                        </a>
+                    </li>
+                    <li>
+                        <a href="<?= "/actor/$actor->id/feed/$lang/feed.atom" ?>" target="_blank" type="application/atom+xml">
+                            <span class="material-symbols orbit-outline"></span>
+                            <span><?= __('user.profile.feed.atom') ?></span>
+                        </a>
+                    </li>
+                <?php endif; ?>
                 <?php if ($user != null && $user->actor != $actor): ?>
                     <li><?php call_template('actor_profile_block_button', ['user' => $user, 'actor' => $actor]) ?></li>
                 <?php endif; ?>
diff --git a/templates/actor_profile_page.php b/templates/actor_profile_page.php
index dbeb86a..1b2981d 100644
--- a/templates/actor_profile_page.php
+++ b/templates/actor_profile_page.php
@@ -2,6 +2,10 @@
 
 use Digitigrade\Model\Note;
 use Digitigrade\Model\UserAccount;
+use Digitigrade\UserSettings;
+
+$lang = get_ui_language();
+$actorUser = UserAccount::findByLinkedActor($actor);
 
 call_template('skeleton', [
     'pageTitle' => "$actor->displayName - @" . $actor->getFullHandle(),
@@ -10,9 +14,22 @@ call_template('skeleton', [
     'ogDesc' => $actor->bio,
     'ogImage' => $actor->avatar ?? path_to_uri('/static/default-avatar.png'),
     'ogType' => 'profile',
-    'ogHandle' => '@' . $actor->getFullHandle(true)
-], function () {
-    global $actor;
+    'ogHandle' => '@' . $actor->getFullHandle(true),
+    'headLinks' => ($actorUser != null && (new UserSettings($actorUser))->getBool('profile.rssEnabled')) ? [
+        [
+            'rel' => 'alternate',
+            'type' => 'application/rss+xml',
+            'href' => "/actor/$actor->id/feed/$lang/feed.rss",
+            'title' => __('user.profile.feed.rss')
+        ],
+        [
+            'rel' => 'alternate',
+            'type' => 'application/atom+xml',
+            'href' => "/actor/$actor->id/feed/$lang/feed.atom",
+            'title' => __('user.profile.feed.atom')
+        ]
+    ] : []
+], function () use ($actor) {
     $user = UserAccount::findByCurrentSession();
 
     call_template('actor_profile', ['actor' => $actor]);
diff --git a/templates/actor_rss.php b/templates/actor_rss.php
new file mode 100644
index 0000000..03fc4f5
--- /dev/null
+++ b/templates/actor_rss.php
@@ -0,0 +1,46 @@
+<?php
+/** @var \Digitigrade\Model\Actor $actor */
+/** @var string $lang */
+
+use Digitigrade\GlobalSettings;
+use Digitigrade\Model\Note;
+use Digitigrade\Model\NotePrivacyScope;
+
+// putting this here because otherwise my ide yells about "shorthand <?"
+// because it thinks i'm trying to do a php thing instead of xml directive
+echo '<?xml version="1.0" encoding="utf-8"?>';
+?>
+<rss version="2.0">
+    <channel>
+        <title>
+            <?= htmlspecialchars($actor->displayName) ?> — <?= GlobalSettings::getInstance()->get('instance.name') ?>
+        </title>
+        <link><?= path_to_uri("/@/$actor->handle") ?></link>
+        <description><?= __f('user.rss.description', htmlspecialchars($actor->displayName)) ?></description>
+        <language><?= $lang ?></language>
+        <generator><?= __f('version', get_version()) ?></generator>
+        <?php if (isset($actor->avatar)): ?>
+            <image>
+                <url><?= $actor->avatar ?></url>
+            </image>
+        <?php endif; ?>
+        <?php foreach (Note::findAllWithAuthor($actor, limit: 50) as $note): ?>
+            <?php
+            /** @var Note $note */
+            if ($note->privacy->scope != NotePrivacyScope::PUBLIC || $note->inReplyTo != null) {
+                continue;
+            }
+            ?>
+            <item>
+                <link><?= path_to_uri("/@/$actor->handle/note/$note->id") ?></link>
+                <guid><?= path_to_uri("/note/$note->id") ?></guid>
+                <title><![CDATA[<?= htmlspecialchars(substr($note->plainContent, 0, 50), double_encode: false) ?>]]></title>
+                <description><![CDATA[<?= $note->getBestContentAsHtml() ?>]]></description>
+                <pubDate><?= $note->created->format(DateTime::RSS) ?></pubDate>
+                <?php foreach ($note->attachments as $file): ?>
+                    <enclosure url="<?= $file->href ?>" type="<?= $file->type ?>" size="-1" /><!-- size unknown sorry :( -->
+                <?php endforeach; ?>
+            </item>
+        <?php endforeach; ?>
+    </channel>
+</rss>
\ No newline at end of file
diff --git a/templates/note.php b/templates/note.php
index 6835a0f..94edf2b 100644
--- a/templates/note.php
+++ b/templates/note.php
@@ -1,4 +1,6 @@
 <?php
+/** @var \Digitigrade\Model\Note $note */
+
 use Digitigrade\Model\Actor;
 use Digitigrade\Model\InteractionKind;
 use Digitigrade\Model\NotePrivacyScope;
@@ -79,7 +81,7 @@ $pathToSelf = '/@/' . $note->author->getFullHandle() . '/note/' . $note->id;
             <details>
                 <summary><?= htmlspecialchars($note->summary) ?></summary>
             <?php endif; ?>
-            <div class="content">
+            <div class="content" lang="<?= $note->language ?>">
                 <?= $note->getBestContentAsHtml() ?>
             </div>
 
diff --git a/templates/preferences_form.php b/templates/preferences_form.php
index 33418f6..d1694eb 100644
--- a/templates/preferences_form.php
+++ b/templates/preferences_form.php
@@ -22,6 +22,7 @@ function _user_pref(string $id, mixed $value, string $type) {
     _user_pref('requestToFollow', $user->actor->requestToFollow, 'boolean');
     _user_pref('smallIndicators', $settings->getBool('interface.smallUnreadIndicators'), 'boolean');
     _user_pref('timezone', $settings->get('locale.timezone'), 'timezone');
+    _user_pref('rssEnabled', $settings->getBool('profile.rssEnabled'), 'boolean');
     ?>
 
     <div class="row">
diff --git a/templates/skeleton.php b/templates/skeleton.php
index 7f40611..5848054 100644
--- a/templates/skeleton.php
+++ b/templates/skeleton.php
@@ -7,7 +7,7 @@ $user = UserAccount::findByCurrentSession();
 $settings = GlobalSettings::getInstance();
 ?>
 <!DOCTYPE html>
-<html lang="en">
+<html lang="<?= get_ui_language() ?>">
 
 <head>
     <title><?= $pageTitle ?> &mdash; <?= $settings->get('instance.name') ?></title>
@@ -29,6 +29,11 @@ $settings = GlobalSettings::getInstance();
     <?php if (isset($ogHandle)): ?>
         <meta name="fediverse:creator" content="<?= $ogHandle ?>">
     <?php endif; ?>
+    <!-- any custom links e.g. rss/atom feeds -->
+    <?php foreach (($headLinks ?? []) as $link): ?>
+        <link rel="<?= $link['rel'] ?>" type="<?= $link['type'] ?? '' ?>" href="<?= $link['href'] ?>"
+            title="<?= $link['title'] ?? '' ?>">
+    <?php endforeach; ?>
     <!-- other page resources -->
     <?php call_template('head_tags'); ?>
 </head>