From 1b7527cccfcafd14a185ef953568f86d9a344ad1 Mon Sep 17 00:00:00 2001
From: Mischa Spelt <mischa.spelt@nhgooi.nl>
Date: Wed, 5 Feb 2020 00:40:55 +0100
Subject: [PATCH] Meta data (OpenGraph) toegevoegd.

---
 common/classes/CalendarEvent.php |  7 +++++++
 common/classes/MetaData.php      | 35 ++++++++++++++++++++++++++++++++
 common/classes/NewsItem.php      | 11 ++++++++++
 common/classes/Podcast.php       | 10 ++++++++-
 4 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 common/classes/MetaData.php

diff --git a/common/classes/CalendarEvent.php b/common/classes/CalendarEvent.php
index 80576ab..768cf43 100644
--- a/common/classes/CalendarEvent.php
+++ b/common/classes/CalendarEvent.php
@@ -14,6 +14,7 @@ class CalendarEvent extends Model {
   public $video;
   public $keywords;
   public $url;
+  public $metadata;
 
   public function __construct($data, $images = null, $podcast = null) {
     parent::__construct($data);
@@ -46,6 +47,12 @@ class CalendarEvent extends Model {
     }
 
     $this->url = "/agenda/{$this->id}/" . parent::url_slug($this->title);
+    $this->metadata = (new MetaData())
+      ->set('title', $this->title)
+      ->set('description', strip_tags($this->excerpt()))
+      ->set('image', isset($this->images) && count($this->images) ? $this->images[0]->url : null )
+      ->set('audio', isset($this->podcast) ? $this->podcast->url : null)
+     ;
   }
 
   public function excerpt() {
diff --git a/common/classes/MetaData.php b/common/classes/MetaData.php
new file mode 100644
index 0000000..de36d80
--- /dev/null
+++ b/common/classes/MetaData.php
@@ -0,0 +1,35 @@
+<?php
+namespace Model;
+
+class MetaData {
+  private $data = ['type' => 'article', 'locale' => 'nl-nl'];
+
+  public function set($prop, $val) {
+    if($val) {
+      $this->data[$prop] = $val;
+    }
+    return $this;
+  }
+
+  public function append($prop, $val) {
+    if(array_key_exists($prop, $this->data)) {
+      $this->data[$prop] .= $val;
+    }
+    return $this;
+  }
+
+  public function prepend($prop, $val) {
+    if(array_key_exists($prop, $this->data)) {
+      $this->data[$prop] = $val . $this->data[$prop];
+    }
+    return $this;
+  }
+
+  public function metaTags() {
+    foreach($this->data as $prop => $val) {
+      if($val) {
+        echo "<meta property=\"og:$prop\" content=\"" . htmlentities($val) . "\" />\n";
+      }
+    }
+  }
+}
diff --git a/common/classes/NewsItem.php b/common/classes/NewsItem.php
index a53c664..a969396 100644
--- a/common/classes/NewsItem.php
+++ b/common/classes/NewsItem.php
@@ -4,6 +4,7 @@ namespace Model;
 
 require_once "NewsImage.php";
 require_once "NewsSource.php";
+require_once "MetaData.php";
 
 class NewsItem extends Model {
   public $id;
@@ -24,6 +25,7 @@ class NewsItem extends Model {
   public $video;
 
   public $url;
+  public $metadata;
 
   public function __construct($data, $images = null, $podcast = null) {
     parent::__construct($data);
@@ -88,6 +90,15 @@ class NewsItem extends Model {
     }
 
     $this->url = "/nieuws/{$this->id}/" . parent::url_slug($this->title);
+    $this->metadata = (new MetaData())
+      ->set('title', $this->title)
+      ->set('description', strip_tags($this->excerpt()))
+      ->set('image', isset($this->images) && count($this->images) ? $this->images[0]->url : null )
+      ->set('video', isset($this->video) ? $this->video : null)
+      ->set('audio', isset($this->podcast) ? $this->podcast->url : null)
+      ->set('article:published_time', $this->published->format('r'))
+      ->set('article:modified_time', $this->edited ? $this->edited->format('r') : null)
+      ;
   }
 
   public function excerpt() {
diff --git a/common/classes/Podcast.php b/common/classes/Podcast.php
index 961c92b..06dc91f 100644
--- a/common/classes/Podcast.php
+++ b/common/classes/Podcast.php
@@ -16,13 +16,14 @@ class Podcast extends Model {
   public $download;
   public $duration;
   public $image;
+  public $metadata;
   private $key;
 
   public function __construct($data) {
     parent::__construct($data);
     parent::ConvertToDateTime($this->created);
 
-    $this->url = $this->id . '/' . parent::url_slug($this->title);
+    $this->url = '/' . $this->id . '/' . parent::url_slug($this->title);
     if($this->soundfilename) {
       // Only generate when not constructing from a JSON object
       $this->key = sha1($this->id . ':' . date('Y-m-d') . ':' . $this->soundfilename);
@@ -45,6 +46,13 @@ class Podcast extends Model {
       $imagedata->title = $data->imagecaption;
       $this->image = new NewsImage($imagedata, '/img/podcast/');
     }
+
+    $this->metadata = (new MetaData())
+      ->set('title', $this->title)
+      ->set('description', strip_tags($this->excerpt()))
+      ->set('image', isset($this->images) && count($this->images) ? $this->images[0]->url : null )
+      ->set('audio', $this->url)
+     ;
   }
 
   public function titleWithoutProgram() {