Can add a translation group id to a talk

When a talk belongs to a translation group then it's fairly easy to find the same talk that has been done in a different language. One talk with two different locales, two different rows, can belong to one group. This is a principle similar to what's used for blog posts.

Database tables DDL queries to add the column:
```
ALTER TABLE `talks` ADD `key_translation_group` int unsigned NULL COMMENT 'No foreign key, yet' AFTER `key_locale`;
ALTER TABLE `talks` ADD UNIQUE `key_locale_key_translation_group` (`key_locale`, `key_translation_group`);
```

site/app/Form/TalkFormFactory.php

@@ -38,6 +38,8 @@ public function create(callable $onSuccess, ?Talk $talk = null): Form
 		$form = $this->factory->create();
 		$allTalks = $this->getAllTalksExcept($talk ? (string)$talk->getAction() : null);
 
+		$form->addInteger('translationGroup', 'Skupina překladů:')
+			->setRequired(false);
 		$form->addSelect('locale', 'Jazyk:', $this->locales->getAllLocales())
 			->setRequired('Zadejte prosím jazyk')
 			->setPrompt('- vyberte -');
@@ -112,6 +114,7 @@ public function create(callable $onSuccess, ?Talk $talk = null): Form
 				$this->talks->update(
 					$talk->getId(),
 					$values->locale,
+					$values->translationGroup,
 					$values->action,
 					$values->title,
 					$values->description,
@@ -145,6 +148,7 @@ public function create(callable $onSuccess, ?Talk $talk = null): Form
 			} else {
 				$talkId = $this->talks->add(
 					$values->locale,
+					$values->translationGroup,
 					$values->action,
 					$values->title,
 					$values->description,
@@ -185,6 +189,7 @@ public function setTalk(Form $form, Talk $talk, SubmitButton $submit): void
 		$values = [
 			'action' => $talk->getAction(),
 			'locale' => $talk->getLocaleId(),
+			'translationGroup' => $talk->getTranslationGroupId(),
 			'title' => $talk->getTitleTexy(),
 			'description' => $talk->getDescriptionTexy(),
 			'date' => $talk->getDate()->format('Y-m-d H:i'),

site/app/Talks/Talk.php

@@ -14,6 +14,7 @@ public function __construct(
 		private readonly int $id,
 		private readonly int $localeId,
 		private readonly string $locale,
+		private readonly ?int $translationGroupId,
 		private readonly ?string $action,
 		private readonly ?string $url,
 		private readonly Html $title,
@@ -63,6 +64,12 @@ public function getLocale(): string
 	}
 
 
+	public function getTranslationGroupId(): ?int
+	{
+		return $this->translationGroupId;
+	}
+
+
 	public function getAction(): ?string
 	{
 		return $this->action;

site/app/Talks/TalkFactory.php

@@ -37,6 +37,7 @@ public function createFromDatabaseRow(Row $row): Talk
 			$row->id,
 			$row->localeId,
 			$row->locale,
+			$row->translationGroupId,
 			$row->action,
 			$url ?? null,
 			$this->texyFormatter->format($row->title),

site/app/Talks/Talks.php

@@ -33,6 +33,7 @@ public function getAll(?int $limit = null): array
 				t.id_talk AS id,
 				t.key_locale AS localeId,
 				l.locale,
+				t.key_translation_group AS translationGroupId,
 				t.action,
 				t.title,
 				t.description,
@@ -94,6 +95,7 @@ public function getUpcoming(): array
 				t.id_talk AS id,
 				t.key_locale AS localeId,
 				l.locale,
+				t.key_translation_group AS translationGroupId,
 				t.action,
 				t.title,
 				t.description,
@@ -143,6 +145,7 @@ public function get(string $name): Talk
 				t.id_talk AS id,
 				t.key_locale AS localeId,
 				l.locale,
+				t.key_translation_group AS translationGroupId,
 				t.action,
 				t.title,
 				t.description,
@@ -192,6 +195,7 @@ public function getById(int $id): Talk
 				t.id_talk AS id,
 				t.key_locale AS localeId,
 				l.locale,
+				t.key_translation_group AS translationGroupId,
 				t.action,
 				t.title,
 				t.description,
@@ -262,6 +266,7 @@ public function getFavorites(): array
 	public function update(
 		int $id,
 		int $localeId,
+		?int $translationGroupId,
 		?string $action,
 		string $title,
 		?string $description,
@@ -286,6 +291,7 @@ public function update(
 	): void {
 		$params = $this->getAddUpdateParams(
 			$localeId,
+			$translationGroupId,
 			$action,
 			$title,
 			$description,
@@ -319,6 +325,7 @@ public function update(
 	 */
 	public function add(
 		int $localeId,
+		?int $translationGroupId,
 		?string $action,
 		string $title,
 		?string $description,
@@ -343,6 +350,7 @@ public function add(
 	): int {
 		$params = $this->getAddUpdateParams(
 			$localeId,
+			$translationGroupId,
 			$action,
 			$title,
 			$description,
@@ -389,6 +397,7 @@ public function pageTitle(string $translationKey, Talk $talk): Html
 	 */
 	private function getAddUpdateParams(
 		int $localeId,
+		?int $translationGroupId,
 		?string $action,
 		string $title,
 		?string $description,
@@ -418,6 +427,7 @@ private function getAddUpdateParams(
 		}
 		return [
 			'key_locale' => $localeId,
+			'key_translation_group' => empty($translationGroupId) ? null : $translationGroupId,
 			'action' => (empty($action) ? null : $action),
 			'title' => $title,
 			'description' => (empty($description) ? null : $description),

site/app/Talks/talkInputs.latte

@@ -3,6 +3,9 @@
 {varType int $videoThumbnailHeight}
 {form talk class => "aligned wide"}
 	<table>
+		<tr>
+			<th>{label translationGroup /}</th><td class="short">{input translationGroup}</td>
+		</tr>
 		<tr>
 			<th>{label locale /}</th><td class="short">{input locale}</td>
 		</tr>