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feat: Implement Telegram HTML support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| // this code is a typescript conversion of the original python code from the repo: https://github.com/Latand/formatter-chatgpt-telegram | ||
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| function convertHtmlChars(text: string): string { | ||
| text = text.replace(/&/g, "&"); | ||
| text = text.replace(/</g, "<"); | ||
| text = text.replace(/>/g, ">"); | ||
| return text; | ||
| } | ||
|
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| function splitByTag(outText: string, mdTag: string, htmlTag: string): string { | ||
| const tagPattern = new RegExp( | ||
| `(?<!\\w)${escapeRegExp(mdTag)}(.*?)${escapeRegExp(mdTag)}(?!\\w)`, | ||
| "gs" | ||
| ); | ||
| return outText.replace(tagPattern, `<${htmlTag}>$1</${htmlTag}>`); | ||
| } | ||
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| function escapeRegExp(string: string): string { | ||
| return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); | ||
| } | ||
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| function ensureClosingDelimiters(text: string): string { | ||
| if ((text.match(/```/g) || []).length % 2 !== 0) { | ||
| text += "```"; | ||
| } | ||
| if ((text.match(/`/g) || []).length % 2 !== 0) { | ||
| text += "`"; | ||
| } | ||
| return text; | ||
| } | ||
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| function extractAndConvertCodeBlocks(text: string): [string, Record<string, string>] { | ||
| text = ensureClosingDelimiters(text); | ||
| const placeholders: string[] = []; | ||
| const codeBlocks: Record<string, string> = {}; | ||
|
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| const replacer = (match: RegExpMatchArray): [string, string] => { | ||
| const language = match[1] || ""; | ||
| const codeContent = match[3]; | ||
| const placeholder = `CODEBLOCKPLACEHOLDER${placeholders.length}`; | ||
| placeholders.push(placeholder); | ||
| const htmlCodeBlock = language | ||
| ? `<pre><code class="language-${language}">${codeContent}</code></pre>` | ||
| : `<pre><code>${codeContent}</code></pre>`; | ||
| return [placeholder, htmlCodeBlock]; | ||
| }; | ||
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| let modifiedText = text; | ||
| const regex = /```(\w*)?(\n)?(.*?)```/gs; | ||
| let match: RegExpExecArray | null; | ||
|
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| while ((match = regex.exec(text)) !== null) { | ||
| const [placeholder, htmlCodeBlock] = replacer(match); | ||
| codeBlocks[placeholder] = htmlCodeBlock; | ||
| modifiedText = modifiedText.replace(match[0], placeholder); | ||
| } | ||
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| return [modifiedText, codeBlocks]; | ||
| } | ||
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| function reinsertCodeBlocks(text: string, codeBlocks: Record<string, string>): string { | ||
| for (const [placeholder, htmlCodeBlock] of Object.entries(codeBlocks)) { | ||
| text = text.replace(placeholder, htmlCodeBlock); | ||
| } | ||
| return text; | ||
| } | ||
|
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| function combineBlockquotes(text: string): string { | ||
| const lines = text.split("\n"); | ||
| const combinedLines: string[] = []; | ||
| let blockquoteLines: string[] = []; | ||
| let inBlockquote = false; | ||
|
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| for (const line of lines) { | ||
| if (line.startsWith(">")) { | ||
| inBlockquote = true; | ||
| blockquoteLines.push(line.slice(1).trim()); | ||
| } else { | ||
| if (inBlockquote) { | ||
| combinedLines.push( | ||
| `<blockquote>${blockquoteLines.join("\n")}</blockquote>` | ||
| ); | ||
| blockquoteLines = []; | ||
| inBlockquote = false; | ||
| } | ||
| combinedLines.push(line); | ||
| } | ||
| } | ||
|
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| if (inBlockquote) { | ||
| combinedLines.push( | ||
| `<blockquote>${blockquoteLines.join("\n")}</blockquote>` | ||
| ); | ||
| } | ||
|
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| return combinedLines.join("\n"); | ||
| } | ||
|
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| function removeBlockquoteEscaping(output: string): string { | ||
| return output | ||
| .replace(/<blockquote>/g, "<blockquote>") | ||
| .replace(/<\/blockquote>/g, "</blockquote>"); | ||
| } | ||
|
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| export function telegramFormat(text: string): string { | ||
| text = combineBlockquotes(text); | ||
| text = convertHtmlChars(text); | ||
|
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| let [output, codeBlocks] = extractAndConvertCodeBlocks(text); | ||
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| output = output.replace(/</g, "<").replace(/>/g, ">"); | ||
| output = output.replace(/`(.*?)`/g, "<code>$1</code>"); | ||
| output = output.replace(/\*\*\*(.*?)\*\*\*/g, "<b><i>$1</i></b>"); | ||
| output = output.replace(/\_\_\_(.*?)\_\_\_/g, "<u><i>$1</i></u>"); | ||
|
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| output = splitByTag(output, "**", "b"); | ||
| output = splitByTag(output, "__", "u"); | ||
| output = splitByTag(output, "_", "i"); | ||
| output = splitByTag(output, "*", "i"); | ||
| output = splitByTag(output, "~~", "s"); | ||
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| output = output.replace(/【[^】]+】/g, ""); | ||
| output = output.replace(/!?\\[(.*?)\\]\\((.*?)\\)/g, '<a href="$2">$1</a>'); | ||
| output = output.replace(/^\s*#+ (.+)/gm, "<b>$1</b>"); | ||
| output = output.replace(/^(\s*)[\-\*] (.+)/gm, "$1• $2"); | ||
|
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| output = reinsertCodeBlocks(output, codeBlocks); | ||
| output = removeBlockquoteEscaping(output); | ||
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| return output; | ||
| } |