eve/dist/src/public/channels/telegram/attachments.js

Filesystem-first framework for durable backend AI agents that run anywhere.

import{createLogger}from"#internal/logging.js";import{evaluateFilePart,formatUploadPolicyViolation,isMediaTypeAllowed,isUploadsDisabled}from"#public/channels/upload-policy.js";import{EveAttachmentError}from"#internal/attachments/errors.js";import{downloadTelegramFile,getTelegramFile}from"#public/channels/telegram/api.js";const log=createLogger(`telegram.attachments`),TELEGRAM_FILE_URL_PROTOCOL=`telegram-file:`;function collectTelegramFileParts(e,t){if(isUploadsDisabled(t))return[];let n=[];for(let r of e){let e=toTelegramFilePart(r,n.length);if(e===null)continue;let i=evaluateTelegramFilePart(e,r.size,t);if(i!==null){log.warn(`dropped attachment — ${formatUploadPolicyViolation(i)}`,{fileId:r.fileId,name:r.fileName});continue}n.push(e)}return n}function buildTelegramTurnMessage(e,t){let n=e.text||e.caption;return t.length===0?n:n.trim().length===0?[...t]:[{type:`text`,text:n},...t]}function createTelegramFetchFile(e){return async t=>{let n=parseTelegramFileUrl(t);if(n===null)return null;let r=await getTelegramFile({apiBaseUrl:e.api?.apiBaseUrl,credentials:e.credentials,fetch:e.api?.fetch,fileId:n.fileId}),i=await downloadTelegramFile({apiBaseUrl:e.api?.apiBaseUrl,credentials:e.credentials,fetch:e.api?.fetch,fileBaseUrl:e.api?.fileBaseUrl,filePath:r.filePath});if(!i.ok)throw new EveAttachmentError({adapterKind:`telegram`,kind:`resolver-threw`,message:`Telegram file fetch returned HTTP ${i.status}.`});let a=Buffer.from(await i.arrayBuffer()),o=i.headers.get(`content-type`)??n.mediaType??`application/octet-stream`,s={bytes:a,filename:n.filename,mediaType:o},c=evaluateFilePart({data:s.bytes,filename:s.filename,mediaType:o,type:`file`},e.policy);if(c!==null)throw new EveAttachmentError({adapterKind:`telegram`,kind:`resolver-threw`,message:`Telegram file rejected — ${formatUploadPolicyViolation(c)}`});return s}}function createTelegramFileUrl(e){let t=new URLSearchParams;e.filename!==void 0&&t.set(`filename`,e.filename),e.mediaType!==void 0&&t.set(`mediaType`,e.mediaType);let n=t.size>0?`?${t.toString()}`:``;return new URL(`${TELEGRAM_FILE_URL_PROTOCOL}${encodeURIComponent(e.fileId)}${n}`)}function toTelegramFilePart(e,t){let n=e.mediaType??(e.kind===`photo`?`image/jpeg`:`application/octet-stream`),r=e.fileName??(e.kind===`photo`?`photo-${t}.jpg`:`file-${t}`);return{data:createTelegramFileUrl({fileId:e.fileId,filename:r,mediaType:n}),filename:r,mediaType:n,type:`file`}}function parseTelegramFileUrl(e){let t;try{t=new URL(e)}catch{return null}if(t.protocol!==`telegram-file:`)return null;let n=decodeURIComponent(t.pathname);return n?{fileId:n,filename:t.searchParams.get(`filename`)??void 0,mediaType:t.searchParams.get(`mediaType`)??void 0}:null}function evaluateTelegramFilePart(e,t,n){return n===`disabled`||!isMediaTypeAllowed(e.mediaType,n)?evaluateFilePart(e,n):t!==void 0&&t>n.maxBytes?{byteLength:t,filename:e.filename,kind:`too-large`,limit:n.maxBytes,mediaType:e.mediaType}:null}export{TELEGRAM_FILE_URL_PROTOCOL,buildTelegramTurnMessage,collectTelegramFileParts,createTelegramFetchFile,createTelegramFileUrl};