eve
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Filesystem-first framework for durable backend AI agents that run anywhere.
1 lines • 2.86 kB
JavaScript
import{createLogger}from"#internal/logging.js";import{evaluateFilePart,formatUploadPolicyViolation,isMediaTypeAllowed,isUploadsDisabled}from"#public/channels/upload-policy.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 r=[];for(let i of e){let e=toTelegramFilePart(i,r.length);if(e===null)continue;let a=evaluateTelegramFilePart(e,i.size,t);if(a!==null){log.warn(`dropped attachment — ${formatUploadPolicyViolation(a)}`,{fileId:i.fileId,name:i.fileName});continue}r.push(e)}return r}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 r=>{let i=parseTelegramFileUrl(r);if(i===null)return null;let o=await getTelegramFile({apiBaseUrl:e.api?.apiBaseUrl,credentials:e.credentials,fetch:e.api?.fetch,fileId:i.fileId}),s=await downloadTelegramFile({apiBaseUrl:e.api?.apiBaseUrl,credentials:e.credentials,fetch:e.api?.fetch,fileBaseUrl:e.api?.fileBaseUrl,filePath:o.filePath});if(!s.ok)throw Error(`Telegram file fetch returned HTTP ${s.status} for ${r}.`);let c=Buffer.from(await s.arrayBuffer()),l=s.headers.get(`content-type`)??i.mediaType??`application/octet-stream`,u={bytes:c,filename:i.filename,mediaType:l},d=evaluateFilePart({data:u.bytes,filename:u.filename,mediaType:l,type:`file`},e.policy);if(d!==null)throw Error(`Telegram file rejected — ${formatUploadPolicyViolation(d)}`);return u}}function createTelegramFileUrl(e){let t=new URLSearchParams;e.filename!==void 0&&t.set(`filename`,e.filename),e.mediaType!==void 0&&t.set(`mediaType`,e.mediaType);let n=t.size>0?`?${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,n,i){return i===`disabled`||!isMediaTypeAllowed(e.mediaType,i)?evaluateFilePart(e,i):n!==void 0&&n>i.maxBytes?{byteLength:n,filename:e.filename,kind:`too-large`,limit:i.maxBytes,mediaType:e.mediaType}:null}export{TELEGRAM_FILE_URL_PROTOCOL,buildTelegramTurnMessage,collectTelegramFileParts,createTelegramFetchFile,createTelegramFileUrl};