From b34d5b8306303b860574ffb6800923dde811dced Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 13 Apr 2020 12:17:55 +0400
Subject: [PATCH] Check solution length in CreatePollBox.

---
 .../SourceFiles/boxes/create_poll_box.cpp     | 31 +++++++++++++++++++
 Telegram/SourceFiles/boxes/create_poll_box.h  |  1 +
 2 files changed, 32 insertions(+)

diff --git a/Telegram/SourceFiles/boxes/create_poll_box.cpp b/Telegram/SourceFiles/boxes/create_poll_box.cpp
index 02c07dc8b..7741e5f28 100644
--- a/Telegram/SourceFiles/boxes/create_poll_box.cpp
+++ b/Telegram/SourceFiles/boxes/create_poll_box.cpp
@@ -39,6 +39,7 @@ constexpr auto kOptionLimit = 100;
 constexpr auto kWarnQuestionLimit = 80;
 constexpr auto kWarnOptionLimit = 30;
 constexpr auto kSolutionLimit = 200;
+constexpr auto kWarnSolutionLimit = 60;
 constexpr auto kErrorLimit = 99;
 
 class Options {
@@ -825,6 +826,28 @@ not_null<Ui::InputField*> CreatePollBox::setupSolution(
 	solution->setEditLinkCallback(
 		DefaultEditLinkCallback(_session, solution));
 
+	const auto warning = CreateWarningLabel(
+		inner,
+		solution,
+		kSolutionLimit,
+		kWarnSolutionLimit);
+	rpl::combine(
+		solution->geometryValue(),
+		warning->sizeValue()
+	) | rpl::start_with_next([=](QRect geometry, QSize label) {
+		warning->moveToLeft(
+			(inner->width()
+				- label.width()
+				- st::createPollWarningPosition.x()),
+			(geometry.y()
+				- st::createPollFieldPadding.top()
+				- st::settingsSubsectionTitlePadding.bottom()
+				- st::settingsSubsectionTitle.style.font->height
+				+ st::settingsSubsectionTitle.style.font->ascent
+				- st::createPollWarning.style.font->ascent),
+			geometry.width());
+	}, warning->lifetime());
+
 	inner->add(
 		object_ptr<Ui::FlatLabel>(
 			inner,
@@ -990,6 +1013,12 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 		} else {
 			*error &= ~Error::Correct;
 		}
+		if (quiz->checked()
+			&& solution->getLastText().trimmed().size() > kSolutionLimit) {
+			*error |= Error::Solution;
+		} else {
+			*error &= ~Error::Solution;
+		}
 	};
 	const auto showError = [=](const QString &text) {
 		Ui::Toast::Show(text);
@@ -1004,6 +1033,8 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 			options->focusFirst();
 		} else if (*error & Error::Correct) {
 			showError(tr::lng_polls_choose_correct(tr::now));
+		} else if (*error & Error::Solution) {
+			solution->showError();
 		} else if (!*error) {
 			_submitRequests.fire({ collectResult(), sendOptions });
 		}
diff --git a/Telegram/SourceFiles/boxes/create_poll_box.h b/Telegram/SourceFiles/boxes/create_poll_box.h
index b9750858f..5c0258b26 100644
--- a/Telegram/SourceFiles/boxes/create_poll_box.h
+++ b/Telegram/SourceFiles/boxes/create_poll_box.h
@@ -50,6 +50,7 @@ private:
 		Options  = 0x02,
 		Correct  = 0x04,
 		Other    = 0x08,
+		Solution = 0x10,
 	};
 	friend constexpr inline bool is_flag_type(Error) { return true; }
 	using Errors = base::flags<Error>;