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

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

import{createLogger}from"#internal/logging.js";import{isObject}from"#shared/guards.js";import{evaluateFilePart,formatUploadPolicyViolation,isUploadsDisabled,mergeUploadPolicy}from"#public/channels/upload-policy.js";const log=createLogger(`teams.attachments`);function normalizeTeamsFilesPolicy(e){return{allowedHosts:e?.allowedHosts??[],enabled:e?.enabled===!0,uploadPolicy:mergeUploadPolicy(e?.uploadPolicy)}}function collectTeamsFileParts(e,t){if(!t.enabled||isUploadsDisabled(t.uploadPolicy))return[];let a=[];for(let i of e){let e=toTeamsFilePart(i,a.length,t);if(e===null)continue;let o=evaluateFilePart(e,t.uploadPolicy);if(o!==null){log.warn(`dropped Teams attachment — ${formatUploadPolicyViolation(o)}`,{name:i.name});continue}a.push(e)}return a}function buildTeamsTurnMessage(e,t){return t.length===0?e:e.trim().length===0?[...t]:[{type:`text`,text:e},...t]}function createTeamsFetchFile(e){return async t=>{if(!e.enabled||!isAllowedUrl(t,e.allowedHosts))return null;let n=await fetch(t);if(!n.ok)throw Error(`Teams file fetch returned HTTP ${n.status} for ${t}.`);return{bytes:Buffer.from(await n.arrayBuffer()),mediaType:n.headers.get(`content-type`)??void 0}}}function toTeamsFilePart(e,t,n){let r=readAttachmentUrl(e);return!r||!isAllowedUrl(r,n.allowedHosts)?null:{data:new URL(r),filename:e.name??`teams-attachment-${t}`,mediaType:inferMediaType(e),type:`file`}}function readAttachmentUrl(e){return e.contentType===`application/vnd.microsoft.teams.file.download.info`&&isObject(e.content)&&typeof e.content.downloadUrl==`string`?e.content.downloadUrl:e.contentUrl&&!e.contentType.startsWith(`application/vnd.microsoft.card.`)?e.contentUrl:null}function inferMediaType(e){return e.contentType===`application/vnd.microsoft.teams.file.download.info`&&(isObject(e.content)&&typeof e.content.fileType==`string`?e.content.fileType:void 0)===`txt`?`text/plain`:e.contentType||`application/octet-stream`}function isAllowedUrl(e,t){if(t===`*`)return!0;let n;try{n=new URL(e)}catch{return!1}return t.some(e=>n.host===e||n.hostname===e)}export{buildTeamsTurnMessage,collectTeamsFileParts,createTeamsFetchFile,normalizeTeamsFilesPolicy};