Added spoiler support to export.

Telegram/Resources/export_html/css/style.css

@@ -531,3 +531,16 @@ div.toast_shown {
     background-image: url(../images/media_video@2x.png)
 }
 }
+
+.spoiler {
+    background: #e8e8e8;
+}
+.spoiler.hidden {
+    background: #a9a9a9;
+    cursor: pointer;
+    border-radius: 3px;
+}
+.spoiler.hidden span {
+    opacity: 0;
+    user-select: none;
+}

Telegram/Resources/export_html/js/script.js

@@ -52,6 +52,12 @@ function ShowMentionName() {
     return false;
 }
 
+function ShowSpoiler(target) {
+    if (target.classList.contains("hidden")) {
+        target.classList.toggle("hidden");
+    }
+}
+
 function AddClass(element, name) {
     var current = element.className;
     var expression = new RegExp('(^|\\s)' + name + '(\\s|$)', 'g');

Telegram/SourceFiles/export/data/export_data_types.cpp

@@ -154,7 +154,7 @@ std::vector<TextPart> ParseText(
 			[](const MTPDmessageEntityBlockquote&) {
 				return Type::Blockquote; },
 			[](const MTPDmessageEntityBankCard&) { return Type::BankCard; },
-			[](const MTPDmessageEntitySpoiler&) { return Type::Unknown; }); // #TODO spoiler
+			[](const MTPDmessageEntitySpoiler&) { return Type::Spoiler; });
 		part.text = mid(start, length);
 		part.additional = entity.match(
 		[](const MTPDmessageEntityPre &data) {

Telegram/SourceFiles/export/data/export_data_types.h

@@ -541,6 +541,7 @@ struct TextPart {
 		Strike,
 		Blockquote,
 		BankCard,
+		Spoiler,
 	};
 	Type type = Type::Text;
 	Utf8String text;

Telegram/SourceFiles/export/output/export_output_html.cpp

@@ -270,6 +270,10 @@ QByteArray FormatText(
 			return "<blockquote>" + text + "</blockquote>";
 		case Type::BankCard:
 			return text;
+		case Type::Spoiler: return "<span class=\"spoiler hidden\" "
+			"onclick=\"ShowSpoiler(this)\">"
+			"<span aria-hidden=\"true\">"
+			+ text + "</span></span>";
 		}
 		Unexpected("Type in text entities serialization.");
 	}) | ranges::to_vector);

Telegram/SourceFiles/export/output/export_output_json.cpp

@@ -176,6 +176,7 @@ QByteArray SerializeText(
 			case Type::Strike: return "strikethrough";
 			case Type::Blockquote: return "blockquote";
 			case Type::BankCard: return "bank_card";
+			case Type::Spoiler: return "spoiler";
 			}
 			Unexpected("Type in SerializeText.");
 		}();