Move RichText/RichBlock markdown and html into members

Add markdown and html as members of the RichText and RichBlock sealed
interfaces and override them in every inheritor (RichTextPlain,
RichTextGroup and all 21 RichBlock subtypes), mirroring the existing
RichTextEntity implementation. The former RichText/RichBlock.markdown
and .html extension properties (which dispatched via a when over each
subtype) are removed; the shared RichBlock render helpers become
internal so the overrides can reuse them.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tgbotapi.core/api/tgbotapi.core.api

@@ -34473,6 +34473,8 @@ public final class dev/inmo/tgbotapi/types/rich/InputRichMessageKt {
 
 public abstract interface class dev/inmo/tgbotapi/types/rich/RichBlock {
 	public static final field Companion Ldev/inmo/tgbotapi/types/rich/RichBlock$Companion;
+	public abstract fun getHtml ()Ljava/lang/String;
+	public abstract fun getMarkdown ()Ljava/lang/String;
 	public abstract fun getType ()Ljava/lang/String;
 }
 
@@ -34488,6 +34490,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockAnchor : dev/inmo/tgbot
 	public final fun copy (Ljava/lang/String;)Ldev/inmo/tgbotapi/types/rich/RichBlockAnchor;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockAnchor;Ljava/lang/String;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockAnchor;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getName ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -34523,6 +34527,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockAnimation : dev/inmo/tg
 	public final fun getAnimation ()Ldev/inmo/tgbotapi/types/files/AnimationFile;
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
 	public final fun getHasSpoiler ()Ljava/lang/Boolean;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34555,6 +34561,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockAudio : dev/inmo/tgbota
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getAudio ()Ldev/inmo/tgbotapi/types/files/AudioFile;
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34587,6 +34595,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockBlockQuotation : dev/in
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBlocks ()Ljava/util/List;
 	public final fun getCredit ()Ldev/inmo/tgbotapi/types/rich/RichText;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34649,6 +34659,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockCollage : dev/inmo/tgbo
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBlocks ()Ljava/util/List;
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34681,6 +34693,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockDetails : dev/inmo/tgbo
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockDetails;Ldev/inmo/tgbotapi/types/rich/RichText;Ljava/util/List;Ljava/lang/Boolean;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockDetails;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBlocks ()Ljava/util/List;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getSummary ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -34708,6 +34722,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockDivider : dev/inmo/tgbo
 	public static final field TYPE Ljava/lang/String;
 	public fun <init> ()V
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34736,6 +34752,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockFooter : dev/inmo/tgbot
 	public final fun copy (Ldev/inmo/tgbotapi/types/rich/RichText;)Ldev/inmo/tgbotapi/types/rich/RichBlockFooter;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockFooter;Ldev/inmo/tgbotapi/types/rich/RichText;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockFooter;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -34758,9 +34776,7 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockFooter$Companion {
 }
 
 public final class dev/inmo/tgbotapi/types/rich/RichBlockFormattingKt {
-	public static final fun getHtml (Ldev/inmo/tgbotapi/types/rich/RichBlock;)Ljava/lang/String;
 	public static final fun getHtml (Ldev/inmo/tgbotapi/types/rich/RichTextInfo;)Ljava/lang/String;
-	public static final fun getMarkdown (Ldev/inmo/tgbotapi/types/rich/RichBlock;)Ljava/lang/String;
 	public static final fun getMarkdown (Ldev/inmo/tgbotapi/types/rich/RichTextInfo;)Ljava/lang/String;
 	public static final fun toRichHtml (Ljava/util/List;)Ljava/lang/String;
 	public static final fun toRichMarkdown (Ljava/util/List;)Ljava/lang/String;
@@ -34774,7 +34790,9 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockList : dev/inmo/tgbotap
 	public final fun copy (Ljava/util/List;)Ldev/inmo/tgbotapi/types/rich/RichBlockList;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockList;Ljava/util/List;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockList;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
 	public final fun getItems ()Ljava/util/List;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34856,7 +34874,9 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockMap : dev/inmo/tgbotapi
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
 	public final fun getHeight ()I
+	public fun getHtml ()Ljava/lang/String;
 	public final fun getLocation ()Ldev/inmo/tgbotapi/types/location/StaticLocation;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public final fun getWidth ()I
 	public final fun getZoom ()I
@@ -34888,6 +34908,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockMathematicalExpression
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockMathematicalExpression;Ljava/lang/String;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockMathematicalExpression;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getExpression ()Ljava/lang/String;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -34916,6 +34938,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockParagraph : dev/inmo/tg
 	public final fun copy (Ldev/inmo/tgbotapi/types/rich/RichText;)Ldev/inmo/tgbotapi/types/rich/RichBlockParagraph;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockParagraph;Ldev/inmo/tgbotapi/types/rich/RichText;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockParagraph;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -34950,6 +34974,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockPhoto : dev/inmo/tgbota
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
 	public final fun getHasSpoiler ()Ljava/lang/Boolean;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getPhoto-bGlShw4 ()Ljava/util/List;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -34981,7 +35007,9 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockPreformatted : dev/inmo
 	public final fun copy (Ldev/inmo/tgbotapi/types/rich/RichText;Ljava/lang/String;)Ldev/inmo/tgbotapi/types/rich/RichBlockPreformatted;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockPreformatted;Ldev/inmo/tgbotapi/types/rich/RichText;Ljava/lang/String;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockPreformatted;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
 	public final fun getLanguage ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -35014,6 +35042,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockPullQuotation : dev/inm
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockPullQuotation;Ldev/inmo/tgbotapi/types/rich/RichText;Ldev/inmo/tgbotapi/types/rich/RichText;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockPullQuotation;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCredit ()Ldev/inmo/tgbotapi/types/rich/RichText;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -35044,6 +35074,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockSectionHeading : dev/in
 	public final fun copy (Ldev/inmo/tgbotapi/types/rich/RichText;I)Ldev/inmo/tgbotapi/types/rich/RichBlockSectionHeading;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockSectionHeading;Ldev/inmo/tgbotapi/types/rich/RichText;IILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockSectionHeading;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getSize ()I
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
@@ -35082,6 +35114,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockSlideshow : dev/inmo/tg
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBlocks ()Ljava/util/List;
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -35116,6 +35150,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockTable : dev/inmo/tgbota
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public final fun getCells ()Ljava/util/List;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
 	public final fun isBordered ()Ljava/lang/Boolean;
@@ -35184,6 +35220,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockThinking : dev/inmo/tgb
 	public final fun copy (Ldev/inmo/tgbotapi/types/rich/RichText;)Ldev/inmo/tgbotapi/types/rich/RichBlockThinking;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockThinking;Ldev/inmo/tgbotapi/types/rich/RichText;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockThinking;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ldev/inmo/tgbotapi/types/rich/RichText;
 	public fun getType ()Ljava/lang/String;
 	public fun hashCode ()I
@@ -35218,6 +35256,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockVideo : dev/inmo/tgbota
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
 	public final fun getHasSpoiler ()Ljava/lang/Boolean;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public final fun getVideo ()Ldev/inmo/tgbotapi/types/files/VideoFile;
 	public fun hashCode ()I
@@ -35250,6 +35290,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlockVoiceNote : dev/inmo/tg
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichBlockVoiceNote;Ldev/inmo/tgbotapi/types/files/VoiceFile;Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichBlockVoiceNote;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getCaption ()Ldev/inmo/tgbotapi/types/rich/RichBlockCaption;
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public fun getType ()Ljava/lang/String;
 	public final fun getVoiceNote ()Ldev/inmo/tgbotapi/types/files/VoiceFile;
 	public fun hashCode ()I
@@ -35302,6 +35344,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichBlocksBuilder {
 
 public abstract interface class dev/inmo/tgbotapi/types/rich/RichText {
 	public static final field Companion Ldev/inmo/tgbotapi/types/rich/RichText$Companion;
+	public abstract fun getHtml ()Ljava/lang/String;
+	public abstract fun getMarkdown ()Ljava/lang/String;
 }
 
 public final class dev/inmo/tgbotapi/types/rich/RichText$Companion {
@@ -35716,8 +35760,6 @@ public final class dev/inmo/tgbotapi/types/rich/RichTextEntitySerializer : kotli
 
 public final class dev/inmo/tgbotapi/types/rich/RichTextFormattingKt {
 	public static final fun escapeRichMarkdown (Ljava/lang/String;)Ljava/lang/String;
-	public static final fun getHtml (Ldev/inmo/tgbotapi/types/rich/RichText;)Ljava/lang/String;
-	public static final fun getMarkdown (Ldev/inmo/tgbotapi/types/rich/RichText;)Ljava/lang/String;
 	public static final fun getSource (Ldev/inmo/tgbotapi/types/rich/RichText;)Ljava/lang/String;
 }
 
@@ -35728,6 +35770,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichTextGroup : dev/inmo/tgbotap
 	public final fun copy (Ljava/util/List;)Ldev/inmo/tgbotapi/types/rich/RichTextGroup;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichTextGroup;Ljava/util/List;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichTextGroup;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getParts ()Ljava/util/List;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
@@ -35977,6 +36021,8 @@ public final class dev/inmo/tgbotapi/types/rich/RichTextPlain : dev/inmo/tgbotap
 	public final fun copy (Ljava/lang/String;)Ldev/inmo/tgbotapi/types/rich/RichTextPlain;
 	public static synthetic fun copy$default (Ldev/inmo/tgbotapi/types/rich/RichTextPlain;Ljava/lang/String;ILjava/lang/Object;)Ldev/inmo/tgbotapi/types/rich/RichTextPlain;
 	public fun equals (Ljava/lang/Object;)Z
+	public fun getHtml ()Ljava/lang/String;
+	public fun getMarkdown ()Ljava/lang/String;
 	public final fun getText ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/rich/RichBlock.kt

@@ -18,6 +18,16 @@ import kotlinx.serialization.json.jsonPrimitive
 @ClassCastsIncluded
 sealed interface RichBlock {
     val type: String
+
+    /**
+     * [Rich Markdown style](https://core.telegram.org/bots/api#rich-markdown-style) source of this single [RichBlock].
+     */
+    val markdown: String
+
+    /**
+     * [Rich HTML style](https://core.telegram.org/bots/api#rich-html-style) source of this single [RichBlock].
+     */
+    val html: String
 }
 
 object RichBlockSerializer : JsonContentPolymorphicSerializer<RichBlock>(RichBlock::class) {

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/rich/RichBlockFormatting.kt

@@ -28,69 +28,13 @@ val RichTextInfo.markdown: String
 val RichTextInfo.html: String
     get() = blocks.toRichHtml()
 
-/**
+internal fun richOpenAttribute(isOpen: Boolean?): String = if (isOpen == true) " open" else ""
- * [Rich Markdown style](https://core.telegram.org/bots/api#rich-markdown-style) source of this single [RichBlock].
- */
-val RichBlock.markdown: String
-    get() = when (this) {
-        is RichBlockParagraph -> text.markdown
-        is RichBlockSectionHeading -> "#".repeat(size) + " " + text.markdown
-        is RichBlockPreformatted -> "```" + (language ?: "") + "\n" + text.source + "\n```"
-        is RichBlockFooter -> "<footer>${text.markdown}</footer>"
-        is RichBlockDivider -> "---"
-        is RichBlockMathematicalExpression -> "\$\$" + expression + "\$\$"
-        is RichBlockAnchor -> "<a name=\"$name\"></a>"
-        is RichBlockList -> richBlockListMarkdown(this)
-        is RichBlockBlockQuotation -> richBlockQuotationMarkdown(blocks, credit)
-        is RichBlockPullQuotation -> "<aside>${text.markdown}${creditCiteMarkdown(credit)}</aside>"
-        is RichBlockCollage -> richMediaContainerMarkdown("tg-collage", blocks, caption)
-        is RichBlockSlideshow -> richMediaContainerMarkdown("tg-slideshow", blocks, caption)
-        is RichBlockTable -> richBlockTableMarkdown(this)
-        is RichBlockDetails -> "<details${richOpenAttribute(isOpen)}><summary>${summary.markdown}</summary>\n\n${blocks.toRichMarkdown()}\n\n</details>"
-        is RichBlockMap -> richBlockMapMarkdown(this)
-        is RichBlockAnimation -> richMediaMarkdown(animation.fileId.fileId, caption)
-        is RichBlockAudio -> richMediaMarkdown(audio.fileId.fileId, caption)
-        is RichBlockPhoto -> richMediaMarkdown(photo.fileId.fileId, caption)
-        is RichBlockVideo -> richMediaMarkdown(video.fileId.fileId, caption)
-        is RichBlockVoiceNote -> richMediaMarkdown(voiceNote.fileId.fileId, caption)
-        is RichBlockThinking -> "<tg-thinking>${text.markdown}</tg-thinking>"
-    }
 
-/**
+internal fun creditCiteMarkdown(credit: RichText?): String = credit?.let { "<cite>${it.markdown}</cite>" } ?: ""
- * [Rich HTML style](https://core.telegram.org/bots/api#rich-html-style) source of this single [RichBlock].
- */
-val RichBlock.html: String
-    get() = when (this) {
-        is RichBlockParagraph -> "<p>${text.html}</p>"
-        is RichBlockSectionHeading -> "<h$size>${text.html}</h$size>"
-        is RichBlockPreformatted -> language?.let { "<pre><code class=\"language-$it\">${text.html}</code></pre>" } ?: "<pre>${text.html}</pre>"
-        is RichBlockFooter -> "<footer>${text.html}</footer>"
-        is RichBlockDivider -> "<hr/>"
-        is RichBlockMathematicalExpression -> "<tg-math-block>$expression</tg-math-block>"
-        is RichBlockAnchor -> "<a name=\"$name\"></a>"
-        is RichBlockList -> richBlockListHtml(this)
-        is RichBlockBlockQuotation -> "<blockquote>${blocks.toRichHtml()}${creditCiteHtml(credit)}</blockquote>"
-        is RichBlockPullQuotation -> "<aside>${text.html}${creditCiteHtml(credit)}</aside>"
-        is RichBlockCollage -> richMediaContainerHtml("tg-collage", blocks, caption)
-        is RichBlockSlideshow -> richMediaContainerHtml("tg-slideshow", blocks, caption)
-        is RichBlockTable -> richBlockTableHtml(this)
-        is RichBlockDetails -> "<details${richOpenAttribute(isOpen)}><summary>${summary.html}</summary>${blocks.toRichHtml()}</details>"
-        is RichBlockMap -> richBlockMapHtml(this)
-        is RichBlockAnimation -> richMediaHtml("video", animation.fileId.fileId, hasSpoiler == true, selfClosing = false, caption = caption)
-        is RichBlockAudio -> richMediaHtml("audio", audio.fileId.fileId, spoiler = false, selfClosing = false, caption = caption)
-        is RichBlockPhoto -> richMediaHtml("img", photo.fileId.fileId, hasSpoiler == true, selfClosing = true, caption = caption)
-        is RichBlockVideo -> richMediaHtml("video", video.fileId.fileId, hasSpoiler == true, selfClosing = false, caption = caption)
-        is RichBlockVoiceNote -> richMediaHtml("audio", voiceNote.fileId.fileId, spoiler = false, selfClosing = false, caption = caption)
-        is RichBlockThinking -> "<tg-thinking>${text.html}</tg-thinking>"
-    }
 
-private fun richOpenAttribute(isOpen: Boolean?): String = if (isOpen == true) " open" else ""
+internal fun creditCiteHtml(credit: RichText?): String = credit?.let { "<cite>${it.html}</cite>" } ?: ""
 
-private fun creditCiteMarkdown(credit: RichText?): String = credit?.let { "<cite>${it.markdown}</cite>" } ?: ""
+internal fun richBlockListMarkdown(list: RichBlockList): String =
-
-private fun creditCiteHtml(credit: RichText?): String = credit?.let { "<cite>${it.html}</cite>" } ?: ""
-
-private fun richBlockListMarkdown(list: RichBlockList): String =
     list.items.mapIndexed { index, item ->
         val marker = when {
             item.hasCheckbox == true -> if (item.isChecked == true) "- [x] " else "- [ ] "
@@ -102,7 +46,7 @@ private fun richBlockListMarkdown(list: RichBlockList): String =
         }.joinToString(separator = "\n")
     }.joinToString(separator = "\n")
 
-private fun richBlockListHtml(list: RichBlockList): String {
+internal fun richBlockListHtml(list: RichBlockList): String {
     val ordered = list.items.any { it.labelType != null }
     val tag = if (ordered) "ol" else "ul"
     val items = list.items.joinToString(separator = "") { item ->
@@ -120,45 +64,45 @@ private fun richBlockListHtml(list: RichBlockList): String {
     return "<$tag>$items</$tag>"
 }
 
-private fun richBlockQuotationMarkdown(blocks: List<RichBlock>, credit: RichText?): String {
+internal fun richBlockQuotationMarkdown(blocks: List<RichBlock>, credit: RichText?): String {
     val quoted = blocks.toRichMarkdown().lineSequence().joinToString(separator = "\n") { line ->
         if (line.isEmpty()) ">" else "> $line"
     }
     return quoted + (credit?.let { "\n> ${creditCiteMarkdown(it)}" } ?: "")
 }
 
-private fun richMediaContainerMarkdown(tag: String, blocks: List<RichBlock>, caption: RichBlockCaption?): String {
+internal fun richMediaContainerMarkdown(tag: String, blocks: List<RichBlock>, caption: RichBlockCaption?): String {
     val media = blocks.joinToString(separator = "\n") { it.markdown }
     val captionPart = caption?.let { "\n<figcaption>${it.text.markdown}${creditCiteMarkdown(it.credit)}</figcaption>" } ?: ""
     return "<$tag>\n\n$media$captionPart\n\n</$tag>"
 }
 
-private fun richMediaContainerHtml(tag: String, blocks: List<RichBlock>, caption: RichBlockCaption?): String {
+internal fun richMediaContainerHtml(tag: String, blocks: List<RichBlock>, caption: RichBlockCaption?): String {
     val media = blocks.joinToString(separator = "") { it.html }
     val captionPart = caption?.let { "<figcaption>${it.text.html}${creditCiteHtml(it.credit)}</figcaption>" } ?: ""
     return "<$tag>$media$captionPart</$tag>"
 }
 
-private fun richMediaMarkdown(source: String, caption: RichBlockCaption?): String =
+internal fun richMediaMarkdown(source: String, caption: RichBlockCaption?): String =
     caption?.let { "![](" + source + " \"" + it.text.source + "\")" } ?: "![]($source)"
 
-private fun richMediaHtml(tag: String, source: String, spoiler: Boolean, selfClosing: Boolean, caption: RichBlockCaption?): String {
+internal fun richMediaHtml(tag: String, source: String, spoiler: Boolean, selfClosing: Boolean, caption: RichBlockCaption?): String {
     val spoilerAttribute = if (spoiler) " tg-spoiler" else ""
     val element = if (selfClosing) "<$tag src=\"$source\"$spoilerAttribute/>" else "<$tag src=\"$source\"$spoilerAttribute></$tag>"
     return caption?.let { "<figure>$element<figcaption>${it.text.html}${creditCiteHtml(it.credit)}</figcaption></figure>" } ?: element
 }
 
-private fun richBlockMapMarkdown(map: RichBlockMap): String {
+internal fun richBlockMapMarkdown(map: RichBlockMap): String {
     val element = "<tg-map lat=\"${map.location.latitude}\" long=\"${map.location.longitude}\" zoom=\"${map.zoom}\"/>"
     return map.caption?.let { "<figure>$element<figcaption>${it.text.markdown}${creditCiteMarkdown(it.credit)}</figcaption></figure>" } ?: element
 }
 
-private fun richBlockMapHtml(map: RichBlockMap): String {
+internal fun richBlockMapHtml(map: RichBlockMap): String {
     val element = "<tg-map lat=\"${map.location.latitude}\" long=\"${map.location.longitude}\" zoom=\"${map.zoom}\"/>"
     return map.caption?.let { "<figure>$element<figcaption>${it.text.html}${creditCiteHtml(it.credit)}</figcaption></figure>" } ?: element
 }
 
-private fun richBlockTableMarkdown(table: RichBlockTable): String {
+internal fun richBlockTableMarkdown(table: RichBlockTable): String {
     if (table.cells.isEmpty()) return ""
     fun renderRow(row: List<RichBlockTableCell>): String =
         row.joinToString(separator = " | ", prefix = "| ", postfix = " |") { it.text?.markdown ?: "" }
@@ -177,7 +121,7 @@ private fun richBlockTableMarkdown(table: RichBlockTable): String {
     return lines.joinToString(separator = "\n")
 }
 
-private fun richBlockTableHtml(table: RichBlockTable): String {
+internal fun richBlockTableHtml(table: RichBlockTable): String {
     val attributes = buildString {
         if (table.isBordered == true) append(" bordered")
         if (table.isStriped == true) append(" striped")

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/rich/RichBlocks.kt

@@ -49,6 +49,11 @@ data class RichBlockParagraph(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = text.markdown
+    override val html: String
+        get() = "<p>${text.html}</p>"
+
     companion object {
         const val TYPE = "paragraph"
     }
@@ -73,6 +78,11 @@ data class RichBlockSectionHeading(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "#".repeat(size) + " " + text.markdown
+    override val html: String
+        get() = "<h$size>${text.html}</h$size>"
+
     companion object {
         const val TYPE = "heading"
     }
@@ -94,6 +104,11 @@ data class RichBlockPreformatted(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "```" + (language ?: "") + "\n" + text.source + "\n```"
+    override val html: String
+        get() = language?.let { "<pre><code class=\"language-$it\">${text.html}</code></pre>" } ?: "<pre>${text.html}</pre>"
+
     companion object {
         const val TYPE = "pre"
     }
@@ -113,6 +128,11 @@ data class RichBlockFooter(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "<footer>${text.markdown}</footer>"
+    override val html: String
+        get() = "<footer>${text.html}</footer>"
+
     companion object {
         const val TYPE = "footer"
     }
@@ -129,6 +149,11 @@ class RichBlockDivider : RichBlock {
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "---"
+    override val html: String
+        get() = "<hr/>"
+
     override fun equals(other: Any?): Boolean = other is RichBlockDivider
 
     override fun hashCode(): Int = TYPE.hashCode()
@@ -154,6 +179,11 @@ data class RichBlockMathematicalExpression(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "\$\$" + expression + "\$\$"
+    override val html: String
+        get() = "<tg-math-block>$expression</tg-math-block>"
+
     companion object {
         const val TYPE = "mathematical_expression"
     }
@@ -173,6 +203,11 @@ data class RichBlockAnchor(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "<a name=\"$name\"></a>"
+    override val html: String
+        get() = "<a name=\"$name\"></a>"
+
     companion object {
         const val TYPE = "anchor"
     }
@@ -192,6 +227,11 @@ data class RichBlockList(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richBlockListMarkdown(this)
+    override val html: String
+        get() = richBlockListHtml(this)
+
     companion object {
         const val TYPE = "list"
     }
@@ -213,6 +253,11 @@ data class RichBlockBlockQuotation(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richBlockQuotationMarkdown(blocks, credit)
+    override val html: String
+        get() = "<blockquote>${blocks.toRichHtml()}${creditCiteHtml(credit)}</blockquote>"
+
     companion object {
         const val TYPE = "blockquote"
     }
@@ -234,6 +279,11 @@ data class RichBlockPullQuotation(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "<aside>${text.markdown}${creditCiteMarkdown(credit)}</aside>"
+    override val html: String
+        get() = "<aside>${text.html}${creditCiteHtml(credit)}</aside>"
+
     companion object {
         const val TYPE = "pullquote"
     }
@@ -255,6 +305,11 @@ data class RichBlockCollage(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaContainerMarkdown("tg-collage", blocks, caption)
+    override val html: String
+        get() = richMediaContainerHtml("tg-collage", blocks, caption)
+
     companion object {
         const val TYPE = "collage"
     }
@@ -276,6 +331,11 @@ data class RichBlockSlideshow(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaContainerMarkdown("tg-slideshow", blocks, caption)
+    override val html: String
+        get() = richMediaContainerHtml("tg-slideshow", blocks, caption)
+
     companion object {
         const val TYPE = "slideshow"
     }
@@ -301,6 +361,11 @@ data class RichBlockTable(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richBlockTableMarkdown(this)
+    override val html: String
+        get() = richBlockTableHtml(this)
+
     companion object {
         const val TYPE = "table"
     }
@@ -324,6 +389,11 @@ data class RichBlockDetails(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "<details${richOpenAttribute(isOpen)}><summary>${summary.markdown}</summary>\n\n${blocks.toRichMarkdown()}\n\n</details>"
+    override val html: String
+        get() = "<details${richOpenAttribute(isOpen)}><summary>${summary.html}</summary>${blocks.toRichHtml()}</details>"
+
     companion object {
         const val TYPE = "details"
     }
@@ -354,6 +424,11 @@ data class RichBlockMap(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richBlockMapMarkdown(this)
+    override val html: String
+        get() = richBlockMapHtml(this)
+
     companion object {
         const val TYPE = "map"
     }
@@ -377,6 +452,11 @@ data class RichBlockAnimation(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaMarkdown(animation.fileId.fileId, caption)
+    override val html: String
+        get() = richMediaHtml("video", animation.fileId.fileId, hasSpoiler == true, selfClosing = false, caption = caption)
+
     companion object {
         const val TYPE = "animation"
     }
@@ -398,6 +478,11 @@ data class RichBlockAudio(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaMarkdown(audio.fileId.fileId, caption)
+    override val html: String
+        get() = richMediaHtml("audio", audio.fileId.fileId, spoiler = false, selfClosing = false, caption = caption)
+
     companion object {
         const val TYPE = "audio"
     }
@@ -421,6 +506,11 @@ data class RichBlockPhoto(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaMarkdown(photo.fileId.fileId, caption)
+    override val html: String
+        get() = richMediaHtml("img", photo.fileId.fileId, hasSpoiler == true, selfClosing = true, caption = caption)
+
     companion object {
         const val TYPE = "photo"
     }
@@ -444,6 +534,11 @@ data class RichBlockVideo(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaMarkdown(video.fileId.fileId, caption)
+    override val html: String
+        get() = richMediaHtml("video", video.fileId.fileId, hasSpoiler == true, selfClosing = false, caption = caption)
+
     companion object {
         const val TYPE = "video"
     }
@@ -465,6 +560,11 @@ data class RichBlockVoiceNote(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = richMediaMarkdown(voiceNote.fileId.fileId, caption)
+    override val html: String
+        get() = richMediaHtml("audio", voiceNote.fileId.fileId, spoiler = false, selfClosing = false, caption = caption)
+
     companion object {
         const val TYPE = "voice_note"
     }
@@ -484,6 +584,11 @@ data class RichBlockThinking(
     @SerialName(typeField)
     override val type: String = TYPE
 
+    override val markdown: String
+        get() = "<tg-thinking>${text.markdown}</tg-thinking>"
+    override val html: String
+        get() = "<tg-thinking>${text.html}</tg-thinking>"
+
     companion object {
         const val TYPE = "thinking"
     }

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/rich/RichText.kt

@@ -1,6 +1,7 @@
 package dev.inmo.tgbotapi.types.rich
 
 import dev.inmo.tgbotapi.types.typeField
+import dev.inmo.tgbotapi.utils.extensions.toHtml
 import dev.inmo.tgbotapi.utils.internal.ClassCastsIncluded
 import kotlinx.serialization.DeserializationStrategy
 import kotlinx.serialization.KSerializer
@@ -18,7 +19,17 @@ import kotlinx.serialization.json.*
  */
 @Serializable(RichTextSerializer::class)
 @ClassCastsIncluded
-sealed interface RichText
+sealed interface RichText {
+    /**
+     * [Rich Markdown style](https://core.telegram.org/bots/api#rich-markdown-style) representation of this [RichText].
+     */
+    val markdown: String
+
+    /**
+     * [Rich HTML style](https://core.telegram.org/bots/api#rich-html-style) representation of this [RichText].
+     */
+    val html: String
+}
 
 /**
  * A plain (non-formatted) part of a [RichText]. Serialized as a bare JSON string.
@@ -26,7 +37,12 @@ sealed interface RichText
 @Serializable
 data class RichTextPlain(
     val text: String
-) : RichText
+) : RichText {
+    override val markdown: String
+        get() = text.escapeRichMarkdown()
+    override val html: String
+        get() = text.toHtml()
+}
 
 /**
  * A group of [RichText]s. Serialized as a JSON array.
@@ -34,7 +50,12 @@ data class RichTextPlain(
 @Serializable
 data class RichTextGroup(
     val parts: List<RichText>
-) : RichText
+) : RichText {
+    override val markdown: String
+        get() = parts.joinToString(separator = "") { it.markdown }
+    override val html: String
+        get() = parts.joinToString(separator = "") { it.html }
+}
 
 /**
  * Any typed (formatted) part of a [RichText]. Serialized as a JSON object with the [type] discriminator.
@@ -43,8 +64,8 @@ data class RichTextGroup(
 sealed interface RichTextEntity : RichText {
     val type: String
 
-    val markdown: String
+    override val markdown: String
-    val html: String
+    override val html: String
 }
 
 object RichTextSerializer : KSerializer<RichText> {

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/rich/RichTextFormatting.kt

@@ -1,8 +1,5 @@
 package dev.inmo.tgbotapi.types.rich
 
-import dev.inmo.tgbotapi.types.internalUserLinkBeginning
-import dev.inmo.tgbotapi.utils.extensions.toHtml
-
 /**
  * Characters which have a special meaning in the
  * [Rich Markdown style](https://core.telegram.org/bots/api#rich-markdown-style) and must be escaped with a backslash
@@ -60,23 +57,3 @@ val RichText.source: String
         is RichTextReference -> text.source
         is RichTextReferenceLink -> text.source
     }
-
-/**
- * [Rich Markdown style](https://core.telegram.org/bots/api#rich-markdown-style) representation of this [RichText].
- */
-val RichText.markdown: String
-    get() = when (this) {
-        is RichTextPlain -> text.escapeRichMarkdown()
-        is RichTextGroup -> parts.joinToString(separator = "") { it.markdown }
-        is RichTextEntity -> markdown
-    }
-
-/**
- * [Rich HTML style](https://core.telegram.org/bots/api#rich-html-style) representation of this [RichText].
- */
-val RichText.html: String
-    get() = when (this) {
-        is RichTextPlain -> text.toHtml()
-        is RichTextGroup -> parts.joinToString(separator = "") { it.html }
-        is RichTextEntity -> html
-    }