From: Ben Sherratt <redacted>
Date: Sun, 14 Jan 2024 11:29:28 +0000 (+0000)
Subject: Custom markdown for inserting images
X-Git-Url: https://git.bts.cx/cx.git/commitdiff_plain/a33491c3a25cf858b67f279c10d93e0eb863ad92?ds=sidebyside;hp=c469f0f84d54065f375698e891da3461abaf661f

Custom markdown for inserting images
---

diff --git a/cx/lib/images.php b/cx/lib/images.php
index fd6d622..dbe55bf 100644
--- a/cx/lib/images.php
+++ b/cx/lib/images.php
@@ -58,11 +58,30 @@ function cx_images_get(int $limit = 0) {
 	$sql .= ';';
 
 	foreach (cx_db_query($sql) as $image) {
-		$p = new Image($image);
-		yield $p;
+		$i = new Image($image);
+		yield $i;
 	}
 }
 
+function cx_images_find_image($image_id) {
+	$sql = 'SELECT
+		image_id,
+		image_uid,
+		image_type,
+		image_alt_text
+		FROM images
+		WHERE image_id == ?
+		OR image_uid LIKE ?
+		LIMIT 1;';
+
+	foreach (cx_db_query($sql, $image_id, $image_id . "%") as $image) {
+		$i = new Image($image);
+		return $i;
+	}
+
+	return null;
+}
+
 cx_setup_register(1, function() {
 	cx_db_exec('CREATE TABLE images (
 			image_id INTEGER PRIMARY KEY,
diff --git a/cx/lib/markdown.php b/cx/lib/markdown.php
new file mode 100644
index 0000000..8cdc235
--- /dev/null
+++ b/cx/lib/markdown.php
@@ -0,0 +1,41 @@
+<?php
+
+cx_require('lib', 'images.php');
+cx_require('lib', 'url.php');
+cx_require('third_party', 'parsedown', 'Parsedown.php');
+
+class ExtendedParsedown extends Parsedown {
+	public function __construct() {
+		$this->InlineTypes['{'][]= 'BlogImage';
+		$this->inlineMarkerList .= '{';
+	}
+
+	protected function inlineBlogImage($excerpt) {
+		if (preg_match('/^{img:([^}]+)}/', $excerpt['text'], $matches)) {
+			$image_id = $matches[1];
+			$image = cx_images_find_image($image_id);
+
+			if ($image == null) {
+				return;
+			}
+
+			$permalink = '/data/images/' . $image->url;
+
+			return array(
+				'extent' => strlen($matches[0]) + 1, 
+				'element' => array(
+					'name' => 'img',
+					'attributes' => array(
+						'src' => cx_url($permalink),
+						'alt' => $image->alt_text,
+					),
+				),
+			);
+		}
+	}
+}
+
+function cx_markdown_generate_html($markdown) {
+	static $Parsedown = new ExtendedParsedown();
+	return $Parsedown->text($markdown);
+}
diff --git a/cx/lib/posts.php b/cx/lib/posts.php
index 0a2ac4d..988d00e 100644
--- a/cx/lib/posts.php
+++ b/cx/lib/posts.php
@@ -2,13 +2,7 @@
 
 cx_require('lib', 'db.php');
 cx_require('lib', 'setup.php');
-cx_require('third_party', 'parsedown', 'Parsedown.php');
-
-function mk_markdown($markdown) {
-	static $Parsedown = new Parsedown();
-
-	return $Parsedown->text($markdown);
-}
+cx_require('lib', 'markdown.php');
 
 class PostMetadata {
 	public $hero_image;
@@ -37,13 +31,13 @@ class Post {
 		$this->date = $dict['post_date'];
 		$this->is_draft = $dict['post_is_draft'];
 		$this->data = $dict['post_data'];
-		$this->html_content = mk_markdown($this->data);
+		$this->html_content = cx_markdown_generate_html($this->data);
 		$this->html_excerpt = null;
 
 		// Read more...
 		$segments = explode('---', $this->data, 2);
 		if (count($segments) > 1) {
-			$this->html_excerpt = mk_markdown($segments[0]);
+			$this->html_excerpt = cx_markdown_generate_html($segments[0]);
 		}
 	}