New feed mode: HTML + XPath + JSON dot notation (JSON in HTML) (#6888)

* New feed mode: HTML + XPath + JSON dot notation (JSON in HTML)
Same as `JSON+DotNotation` but first extracting the JSON string from an HTML document thanks to an XPath expression.
Example: `//script[@type='application/json']`
fix https://github.com/FreshRSS/FreshRSS/discussions/6876

* JavaScript UI to show/hide new field

* Casing xPathToJson

* Slight renaming

1 files changed, 9 insertions, 1 deletions

diff --git a/app/Controllers/feedController.php b/app/Controllers/feedController.php
index 105099966..2b757177c 100755
--- a/app/Controllers/feedController.php
+++ b/app/Controllers/feedController.php
@@ -260,7 +260,7 @@ class FreshRSS_feed_Controller extends FreshRSS_ActionController {
 				if (!empty($xPathSettings)) {
 					$attributes['xpath'] = $xPathSettings;
 				}
-			} elseif ($feed_kind === FreshRSS_Feed::KIND_JSON_DOTNOTATION) {
+			} elseif ($feed_kind === FreshRSS_Feed::KIND_JSON_DOTNOTATION || $feed_kind === FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION) {
 				$jsonSettings = [];
 				if (Minz_Request::paramString('jsonFeedTitle') !== '') {
 					$jsonSettings['feedTitle'] = Minz_Request::paramString('jsonFeedTitle', true);
@@ -298,6 +298,9 @@ class FreshRSS_feed_Controller extends FreshRSS_ActionController {
 				if (!empty($jsonSettings)) {
 					$attributes['json_dotnotation'] = $jsonSettings;
 				}
+				if (Minz_Request::paramString('xPathToJson', plaintext: true) !== '') {
+					$attributes['xPathToJson'] = Minz_Request::paramString('xPathToJson', plaintext: true);
+				}
 			}
 
 			try {
@@ -509,6 +512,11 @@ class FreshRSS_feed_Controller extends FreshRSS_ActionController {
 					if ($simplePie === null) {
 						throw new FreshRSS_Feed_Exception('JSON Feed parsing failed for [' . $feed->url(false) . ']');
 					}
+				} elseif ($feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION) {
+					$simplePie = $feed->loadJson();
+					if ($simplePie === null) {
+						throw new FreshRSS_Feed_Exception('HTML+XPath+JSON parsing failed for [' . $feed->url(false) . ']');
+					}
 				} else {
 					$simplePie = $feed->load(false, $feedIsNew);
 				}