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

2 files changed, 20 insertions, 2 deletions

diff --git a/app/views/helpers/export/opml.phtml b/app/views/helpers/export/opml.phtml
index b9563815a..eecfc5d23 100644
--- a/app/views/helpers/export/opml.phtml
+++ b/app/views/helpers/export/opml.phtml
@@ -33,6 +33,9 @@ function feedsToOutlines(array $feeds, bool $excludeMutedFeeds = false): array {
 			case FreshRSS_Feed::KIND_JSONFEED:
 				$outline['type'] = FreshRSS_Export_Service::TYPE_JSONFEED;
 				break;
+			case FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION:
+				$outline['type'] = FreshRSS_Export_Service::TYPE_HTML_XPATH_JSON_DOTNOTATION;
+				break;
 		}
 
 		if ($feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH || $feed->kind() === FreshRSS_Feed::KIND_XML_XPATH) {
@@ -48,7 +51,7 @@ function feedsToOutlines(array $feeds, bool $excludeMutedFeeds = false): array {
 			$outline['frss:xPathItemThumbnail'] = $xPathSettings['itemThumbnail'] ?? null;
 			$outline['frss:xPathItemCategories'] = $xPathSettings['itemCategories'] ?? null;
 			$outline['frss:xPathItemUid'] = $xPathSettings['itemUid'] ?? null;
-		} elseif ($feed->kind() === FreshRSS_Feed::KIND_JSON_DOTNOTATION) {
+		} elseif ($feed->kind() === FreshRSS_Feed::KIND_JSON_DOTNOTATION || $feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION) {
 			/** @var array<string,string> */
 			$jsonSettings = $feed->attributeArray('json_dotnotation') ?? [];
 			$outline['frss:jsonItem'] = $jsonSettings['item'] ?? null;
@@ -61,6 +64,9 @@ function feedsToOutlines(array $feeds, bool $excludeMutedFeeds = false): array {
 			$outline['frss:jsonItemThumbnail'] = $jsonSettings['itemThumbnail'] ?? null;
 			$outline['frss:jsonItemCategories'] = $jsonSettings['itemCategories'] ?? null;
 			$outline['frss:jsonItemUid'] = $jsonSettings['itemUid'] ?? null;
+			if ($feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION) {
+				$outline['frss:xPathToJson'] = $feed->attributeString('xPathToJson');
+			}
 		}
 
 		if (!empty($feed->filtersAction('read'))) {
diff --git a/app/views/helpers/feed/update.phtml b/app/views/helpers/feed/update.phtml
index 5a14eff0f..780e9667a 100644
--- a/app/views/helpers/feed/update.phtml
+++ b/app/views/helpers/feed/update.phtml
@@ -416,7 +416,10 @@
 						<option value="<?= FreshRSS_Feed::KIND_HTML_XPATH ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH ? 'selected="selected"' : '' ?> data-show="html_xpath"><?= _t('sub.feed.kind.html_xpath') ?></option>
 						<option value="<?= FreshRSS_Feed::KIND_XML_XPATH ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_XML_XPATH ? 'selected="selected"' : '' ?> data-show="html_xpath"><?= _t('sub.feed.kind.xml_xpath') ?></option>
 						<option value="<?= FreshRSS_Feed::KIND_JSONFEED ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_JSONFEED ? 'selected="selected"' : '' ?>><?= _t('sub.feed.kind.jsonfeed') ?></option>
-						<option value="<?= FreshRSS_Feed::KIND_JSON_DOTNOTATION ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_JSON_DOTNOTATION ? 'selected="selected"' : '' ?> data-show="json_dotnotation"><?= _t('sub.feed.kind.json_dotnotation') ?></option>
+						<option value="<?= FreshRSS_Feed::KIND_JSON_DOTNOTATION ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_JSON_DOTNOTATION ? 'selected="selected"' : '' ?>
+							data-show="json_dotnotation"><?= _t('sub.feed.kind.json_dotnotation') ?></option>
+						<option value="<?= FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION ?>" <?= $this->feed->kind() === FreshRSS_Feed::KIND_HTML_XPATH_JSON_DOTNOTATION ? 'selected="selected"' : '' ?>
+							data-show="json_dotnotation xPathToJsonGroup"><?= _t('sub.feed.kind.html_json') ?></option>
 					</select>
 				</div>
 			</div>
@@ -522,7 +525,16 @@
 			<?php
 				/** @var array<string,string> $jsonSettings */
 				$jsonSettings = Minz_Helper::htmlspecialchars_utf8($this->feed->attributeArray('json_dotnotation') ?? []);
+				$xPathToJson = Minz_Helper::htmlspecialchars_utf8($this->feed->attributeString('xPathToJson'));
 			?>
+			<div class="form-group" id="xPathToJsonGroup">
+				<label class="group-name" for="xPathToJson"><?= _t('sub.feed.kind.html_json.xpath') ?></label>
+				<div class="group-controls">
+					<textarea class="valid-xpath w100" name="xPathToJson" id="xPathToJson" rows="2" cols="64" spellcheck="false" data-leave-validation="<?= $xPathToJson ?>"><?= $xPathToJson ?? '' ?></textarea>
+					<p class="help"><?= _i('help') ?> <?= _t('sub.feed.kind.html_json.xpath.help') ?></p>
+				</div>
+			</div>
+
 			<p class="help"><?= _i('help') ?> <?= _t('sub.feed.kind.json_dotnotation.help') ?></p>
 			<div class="form-group">
 				<label class="group-name" for="jsonItem"><small><?= _t('sub.feed.kind.json_dotnotation.json') ?></small><br />