From ace19a15e4b761e3aaa5724664986a869d1cc3b9 Mon Sep 17 00:00:00 2001
From: emkael <emkael@tlen.pl>
Date: Mon, 31 Jan 2022 21:58:14 +0100
Subject: JSON feeds and Substack support

---
 providers/JsonFeed.php | 39 +++++++++++++++++++++++++++++++++++++++
 providers/Substack.php | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 providers/JsonFeed.php
 create mode 100644 providers/Substack.php

diff --git a/providers/JsonFeed.php b/providers/JsonFeed.php
new file mode 100644
index 0000000..2d2ed9d
--- /dev/null
+++ b/providers/JsonFeed.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Providers;
+
+require_once('Provider.php');
+
+abstract class JsonFeed extends \Providers\Provider {
+
+    protected $_feedUrl;
+    protected $_feedJson;
+
+    abstract protected function _getFeedUrl($feed);
+
+    public function __construct($feed, $options=[]) {
+        parent::__construct($feed, $options);
+        $this->_feedUrl = $this->_getFeedUrl($feed);
+        if (!$this->_feedUrl) {
+            throw new Exception('JSON feed "' . $feed . '" undefined');
+        }
+    }
+
+    abstract protected function _parseFeedContent($feed);
+
+    protected function _fetchItems() {
+        $this->_feedJson = json_decode(file_get_contents($this->_feedUrl));
+        return $this->_parseFeedContent($this->_feedJson);
+    }
+
+    protected function _spamFilter($content) {
+        return $content;
+    }
+
+    protected function _sortContent($content) {
+        return $content;
+    }
+
+}
+
+?>
diff --git a/providers/Substack.php b/providers/Substack.php
new file mode 100644
index 0000000..6dea64a
--- /dev/null
+++ b/providers/Substack.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Providers;
+
+require_once('JsonFeed.php');
+require_once('Item.php');
+
+class Substack extends \Providers\JsonFeed {
+
+    protected function _getFeedUrl($feed) {
+        return sprintf('https://%s.substack.com/api/v1/posts', $feed);
+    }
+
+    protected function _getCachePath() {
+        return '../cache/substack.%s';
+    }
+
+    protected function _parseFeedContent($feed) {
+        return $feed;
+    }
+
+    protected function _mapItems($content) {
+        $items = [];
+        foreach ($content as $item) {
+            $itemObject = new Item();
+            $itemObject->ID = sprintf($this->feedUrl . '/' . $item->publication_id);
+            $itemObject->Title = strval($item->title);
+            $itemObject->Time = $item->post_date;
+            $itemObject->Text = $item->body_html;
+            $itemObject->Link = $item->canonical_url;
+            $itemObject->Author = $item->publishedByLines[0]->name;
+            $items[] = $itemObject;
+        }
+        return $items;
+    }
+
+    public function title() {
+        return sprintf("%s's substack", $this->_feed);
+    }
+
+}
+
+?>
-- 
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