new "createMarkdownText"

CHANGELOG.md

@@ -17,6 +17,8 @@
 * Add `RegularTextMessageEntity` which is useful for representing regular text message entity
 * Add `convertToFullMessageEntityList` which create list of entities with `RegularTextMessageEntity` on places where
 must be regular text
+* Change signature of `createMarkdownText`: now it will return list of strings
+* Deprecate old signatures of `createMarkdownText`, `toMarkdownCaption`, `toMarkdownText`
 
 ### 0.8.5
 

src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/utils/CaptionSourcer.kt

@@ -2,31 +2,81 @@ package com.github.insanusmokrassar.TelegramBotAPI.utils
 
 import com.github.insanusmokrassar.TelegramBotAPI.types.MessageEntity.MessageEntity
 import com.github.insanusmokrassar.TelegramBotAPI.types.MessageEntity.RegularTextMessageEntity
+import com.github.insanusmokrassar.TelegramBotAPI.types.captionLength
 import com.github.insanusmokrassar.TelegramBotAPI.types.message.content.TextContent
 import com.github.insanusmokrassar.TelegramBotAPI.types.message.content.abstracts.CaptionedMediaContent
+import com.github.insanusmokrassar.TelegramBotAPI.types.textLength
 import com.github.insanusmokrassar.TelegramBotAPI.utils.extensions.toMarkdown
 
+@Deprecated(
+    "Deprecated because old version have problem with long texts, but new one must return list of strings"
+)
 fun createMarkdownText(
     text: String,
     messageEntities: List<MessageEntity>
 ): String {
-    return convertToFullMessageEntityList(text, messageEntities).joinToString("", "", "") { it.asMarkdownSource }
+    return createMarkdownText(
+        convertToFullMessageEntityList(text, messageEntities)
+    ).first()
 }
 
-fun CaptionedMediaContent.toMarkdownCaption(): String? = caption ?.let {
-    createMarkdownText(
-        it,
-        captionEntities
-    )
+fun createMarkdownText(
+    entities: List<MessageEntity>,
+    partLength: Int = 4096
+): List<String> {
+    val texts = mutableListOf<String>()
+    val textBuilder = StringBuilder(partLength)
+    for (entity in entities) {
+        val string = entity.asMarkdownSource
+        if (textBuilder.length + string.length > partLength) {
+            if (textBuilder.isNotEmpty()) {
+                texts.add(textBuilder.toString())
+                textBuilder.clear()
+            }
+            val chunked = string.chunked(partLength)
+            val last = chunked.last()
+            textBuilder.append(last)
+            val listToAdd = if (chunked.size > 1) {
+                chunked.subList(0, chunked.size - 1)
+            } else {
+                emptyList()
+            }
+            listToAdd.forEach {
+                texts.add(it)
+            }
+        } else {
+            textBuilder.append(string)
+        }
+    }
+    if (textBuilder.isNotEmpty()) {
+        texts.add(textBuilder.toString())
+        textBuilder.clear()
+    }
+    return texts
 }
 
+@Deprecated(
+    "Deprecated because old version have problem with long texts, but new one must return list of strings"
+)
+fun CaptionedMediaContent.toMarkdownCaption(): String? = toMarkdownCaptions().firstOrNull()
+
+fun CaptionedMediaContent.toMarkdownCaptions(): List<String> = createMarkdownText(
+    fullEntitiesList(),
+    captionLength.endInclusive + 1
+)
+
 fun CaptionedMediaContent.fullEntitiesList(): List<MessageEntity> = caption ?.let {
     convertToFullMessageEntityList(it, captionEntities)
 } ?: emptyList()
 
-fun TextContent.toMarkdownText(): String = createMarkdownText(
-    text,
-    entities
+@Deprecated(
+    "Deprecated because old version have problem with long texts, but new one must return list of strings"
+)
+fun TextContent.toMarkdownText(): String = toMarkdownTexts().first()
+
+fun TextContent.toMarkdownTexts(): List<String> = createMarkdownText(
+    fullEntitiesList(),
+    textLength.endInclusive + 1
 )
 
 fun TextContent.fullEntitiesList(): List<MessageEntity> = convertToFullMessageEntityList(text, entities)