[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_108":109,"_110":111},"routes/embed.x.$handle.$name.$",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":20,"_21":-5},"handle","ewired","name","rss-gallery","path","sources/telegram.ts","project",{"_22":48,"_11":12,"_35":49,"_50":-5,"_51":44,"_52":53,"_54":53,"_55":56,"_57":-5,"_58":59,"_60":61,"_62":34,"_63":-5,"_64":-5,"_65":38,"_66":67,"_68":69,"_70":71,"_72":73,"_74":-5,"_75":76,"_77":76,"_78":79,"_80":79,"_81":79,"_82":76,"_83":76,"_84":85,"_86":87,"_88":89,"_90":44},"file",{"_22":23,"_11":24,"_25":26,"_27":28,"_29":30,"_31":32,"_33":34,"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":-5,"_13":46},"permalink","https://www.val.town/x/ewired/rss-gallery/code/sources/telegram.ts","extension","id","b0e08402-996f-4064-b12e-66ef677b49bd","telegram.ts","fileId","5793e2ec-7ffa-11f1-8432-1607ee4eb77e","parentId","11350cd8-586b-11f1-ab2b-ee650bb23af1","branchId","a439aa76-4505-11f1-9a60-42b51c65c3df","branchVersion",33,"latest",true,"createdAt",["D",1784084861296],"version",0,"fileType","script","content","import { feedEndpoint, HttpError } from \"../feed.ts\";\n// @deno-types=\"https://esm.sh/gh/akopachov/telegram2rss@be14a9831923d49f1876a9027775943ebb464223/src/telegram-parser.ts?dts\"\nimport {\n getChannelInfoWithPosts,\n type Channel,\n type Media,\n type Poll,\n type Post,\n type Reply,\n} from \"https://esm.sh/gh/akopachov/telegram2rss@be14a9831923d49f1876a9027775943ebb464223/src/telegram-parser.ts\";\nimport { innerTextUntil } from \"https://esm.sh/gh/akopachov/telegram2rss@be14a9831923d49f1876a9027775943ebb464223/src/domutils-extensions.ts\";\nimport render from \"npm:dom-serializer@2.0.0\";\nimport { getChildren, isTag, removeElement } from \"npm:domutils@3.1.0\";\nimport type { AnyNode } from \"npm:domhandler@5.0.3\";\n\nconst WhitelistedAttributes = new Set([\n \"href\",\n \"src\",\n \"alt\",\n \"title\",\n \"target\",\n \"rel\",\n]);\nconst DefaultTitleMaxLength = 100;\n\nexport interface TelegramChannelInfo {\n title: string;\n}\n\nexport const telegramChannels: Record = {\n telegram: { title: \"Telegram News\" },\n techcrimes: { title: \"Tech Crimes\" },\n};\n\nconst telegramExpression = `{\n \"version\": $jsonFeedVersion,\n \"title\": channelTitle,\n \"home_page_url\": homePageUrl,\n \"feed_url\": $feedUrl,\n \"description\": channelDescription,\n \"icon\": logoUrl,\n \"items\": posts.{\n \"id\": id,\n \"url\": link,\n \"title\": title,\n \"content_html\": contentHtml,\n \"date_published\": date,\n \"attachments\": $count(attachments) > 0 ? attachments.{\"url\": url, \"mime_type\": mimeType, \"size_in_bytes\": sizeInBytes} : null\n }\n}`;\n\nexport const telegramHandler = feedEndpoint({\n expression: telegramExpression,\n loadSource: async (c) => {\n const channelName = c.req.param(\"channel\")?.replace(/\\.(rss|json)$/, \"\");\n if (!channelName) throw new HttpError(400, \"Missing Telegram channel name\");\n\n const countRaw = c.req.query(\"count\");\n const count = countRaw ? Math.min(Number(countRaw), 50) : undefined;\n\n const titleMaxLengthRaw = c.req.query(\"titleMaxLength\");\n const titleMaxLength = titleMaxLengthRaw\n ? Number(titleMaxLengthRaw)\n : undefined;\n\n let channel: Channel;\n try {\n channel = await getChannelInfoWithPosts(channelName, { count });\n } catch (e) {\n const message = e instanceof Error ? e.message : String(e);\n if (message.includes(\"Unknown channel\")) {\n throw new HttpError(404, `Telegram channel not found: ${channelName}`);\n }\n throw new HttpError(502, `Failed to fetch Telegram channel: ${message}`);\n }\n\n const posts = await Promise.all(\n (channel.posts || []).map((post) => transformPost(post, titleMaxLength)),\n );\n\n return {\n data: {\n channelTitle: channel.title,\n channelDescription: channel.description,\n homePageUrl: channel.link,\n logoUrl: channel.logoUrl,\n posts,\n },\n };\n },\n});\n\nasync function transformPost(post: Post, titleMaxLength?: number) {\n let title = \"\";\n let description = \"\";\n let pollHtml = \"\";\n let replyHtml = \"\";\n\n if (post.textHtml) {\n const nodes = getChildren(post.textHtml);\n sanitizeHtml(nodes);\n description = renderHtml(nodes);\n title = generateTitle(nodes, titleMaxLength);\n }\n\n if (post.poll) {\n if (!title && post.poll.title) {\n const pollNodes = getChildren(post.poll.title);\n sanitizeHtml(pollNodes);\n title = generateTitle(pollNodes, titleMaxLength);\n }\n pollHtml = generatePollHtml(post.poll);\n }\n\n if (post.reply) {\n replyHtml = generateReplyHtml(post.reply);\n }\n\n const mediaHtml = post.media.map(generateMediaHtml).join(\"
\");\n const combinedDescription = [mediaHtml, description, pollHtml]\n .filter((e) => !!e)\n .join(\"
\");\n\n const attachments = await Promise.all(\n post.media.map(getMediaInfo),\n );\n\n return {\n id: post.id,\n link: post.link,\n date: post.date.toISOString(),\n title: title || `Post #${post.id}`,\n contentHtml: replyHtml + combinedDescription,\n attachments,\n };\n}\n\nfunction renderHtml(nodes: AnyNode[]): string {\n return render(nodes, {\n xmlMode: false,\n selfClosingTags: true,\n encodeEntities: false,\n });\n}\n\nfunction sanitizeHtml(nodes: AnyNode[]): void {\n const queue: AnyNode[] = [...nodes];\n while (queue.length > 0) {\n const node = queue.shift()!;\n if (isTag(node)) {\n const children = getChildren(node);\n queue.push(...children);\n if (children.length === 0 && node.tagName !== \"br\") {\n removeElement(node);\n }\n for (const attr of Object.keys(node.attribs)) {\n if (!WhitelistedAttributes.has(attr.toLowerCase())) {\n delete node.attribs[attr];\n }\n }\n }\n }\n}\n\nfunction generateTitle(nodes: AnyNode[], maxLength: number = DefaultTitleMaxLength): string {\n const title = innerTextUntil(nodes, \"br\").trim();\n if (title.length <= maxLength) return title;\n\n const endOfSentence = /[.!?]+\\s/gi;\n let lastIndexInRange = title.length;\n let match;\n while ((match = endOfSentence.exec(title)) != null) {\n if (match.index > maxLength) {\n if (match.index < lastIndexInRange) {\n lastIndexInRange = match.index;\n }\n break;\n }\n lastIndexInRange = match.index;\n }\n\n if (lastIndexInRange > 0 && lastIndexInRange < title.length) {\n return title.slice(0, lastIndexInRange + 1);\n }\n return title;\n}\n\nfunction generateMediaHtml(media: Media): string {\n switch (media.type) {\n case \"photo\":\n return `

`;\n case \"video\":\n return `

`;\n case \"audio\":\n return `

`;\n default:\n return \"\";\n }\n}\n\nasync function getMediaInfo(\n media: Media,\n): Promise<{ url: string; mimeType?: string; sizeInBytes?: number }> {\n try {\n const response = await fetch(media.url, { method: \"HEAD\" });\n const contentType = response.headers.get(\"Content-Type\") || undefined;\n const contentLength = response.headers.get(\"Content-Length\");\n return {\n url: media.url,\n mimeType: contentType,\n sizeInBytes: contentLength ? Number(contentLength) : undefined,\n };\n } catch {\n return { url: media.url };\n }\n}\n\nfunction generatePollHtml(poll: Poll): string {\n let titleHtml = \"\";\n if (poll.title) {\n const nodes = getChildren(poll.title);\n sanitizeHtml(nodes);\n titleHtml = renderHtml(nodes);\n }\n const parts = [\n `

${titleHtml}

`,\n ];\n for (const option of poll.options) {\n parts.push(\n ``,\n );\n }\n parts.push(\"

${option.percent}%

${option.text}

\");\n return parts.join(\"\");\n}\n\nfunction generateReplyHtml(reply: Reply): string {\n let replyText = \"\";\n if (reply.textHtml) {\n const nodes = getChildren(reply.textHtml);\n sanitizeHtml(nodes);\n replyText = renderHtml(nodes);\n }\n return `

${reply.author}
${replyText}

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