eve/dist/src/client/message-reducer.js

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

function defaultMessageReducer(){return{initial(){return{messages:[]}},reduce(e,t){return reduceMessageData(e,t)}}}function reduceMessageData(e,t){switch(t.type){case`client.message.submitted`:return upsertMessage(e,{id:optimisticUserMessageId(t.data.submissionId),metadata:{optimistic:!0,status:`submitted`},parts:[{type:`text`,text:t.data.message}],role:`user`});case`client.message.failed`:return upsertMessage(e,{id:optimisticUserMessageId(t.data.submissionId),metadata:{optimistic:!0,status:`failed`},parts:[{type:`text`,text:t.data.message}],role:`user`});case`client.input.responded`:{let n=e;for(let e of t.data.responses)n=respondToInputRequest(n,e);return n}case`message.received`:return upsertMessage(e,{id:`${t.data.turnId}:user`,metadata:{status:`complete`,turnId:t.data.turnId},parts:[{type:`text`,text:t.data.message,state:`done`}],role:`user`});case`step.started`:return updateAssistantMessage(e,t.data.turnId,e=>ensureStepStartPart(e,t.data.stepIndex));case`reasoning.appended`:return updateAssistantMessage(e,t.data.turnId,e=>upsertPart(ensureStepStartPart(e,t.data.stepIndex),{state:`streaming`,stepIndex:t.data.stepIndex,text:t.data.reasoningSoFar,type:`reasoning`}));case`reasoning.completed`:return updateAssistantMessage(e,t.data.turnId,e=>upsertPart(ensureStepStartPart(e,t.data.stepIndex),{state:`done`,stepIndex:t.data.stepIndex,text:t.data.reasoning,type:`reasoning`}));case`actions.requested`:{let n=e;for(let e of t.data.actions){let r=normalizeActionRequest(e);n=updateAssistantMessage(n,t.data.turnId,n=>upsertPart(ensureStepStartPart(n,t.data.stepIndex),{input:`input`in e?e.input:void 0,state:`input-available`,stepIndex:t.data.stepIndex,toolCallId:e.callId,toolMetadata:createToolMetadata(r),toolName:r.toolName,type:`dynamic-tool`}))}return n}case`input.requested`:{let n=e;for(let e of t.data.requests){let r=normalizeActionRequest(e.action);n=updateAssistantMessage(n,t.data.turnId,n=>upsertPart(ensureStepStartPart(n,t.data.stepIndex),{approval:{id:e.requestId},input:e.action.input,state:`approval-requested`,stepIndex:t.data.stepIndex,toolCallId:e.action.callId,toolMetadata:createToolMetadata(r,{inputRequest:toMessageInputRequest(e)}),toolName:r.toolName,type:`dynamic-tool`}))}return n}case`action.result`:{let n=normalizeActionResult(t.data.result),r=findToolPart(e,t.data.result.callId),i=t.data.error?.code===`TOOL_EXECUTION_DENIED`,a=t.data.status===`failed`&&!i,o=r?.approval?.id??t.data.result.callId,s=mergeToolMetadata(r?.toolMetadata,createToolMetadata(n)),c={input:r?.input,stepIndex:t.data.stepIndex,toolCallId:t.data.result.callId,toolMetadata:s,toolName:r?.toolName??n.toolName,type:`dynamic-tool`},l;return l=i?{...c,approval:{approved:!1,id:o,reason:t.data.error?.message},state:`output-denied`}:a?{...c,approval:approvedApproval(r),errorText:t.data.error?.message??stringifyUnknown(t.data.result.output),state:`output-error`}:{...c,approval:approvedApproval(r),output:t.data.result.output,state:`output-available`},r===void 0?updateAssistantMessage(e,t.data.turnId,e=>upsertPart(ensureStepStartPart(e,t.data.stepIndex),l)):updateToolPart(e,t.data.result.callId,l)}case`message.appended`:return updateAssistantMessage(e,t.data.turnId,e=>upsertPart(ensureStepStartPart(e,t.data.stepIndex),{state:`streaming`,stepIndex:t.data.stepIndex,text:t.data.messageSoFar,type:`text`}));case`message.completed`:return updateAssistantMessage(e,t.data.turnId,e=>t.data.message===null?completeExistingTextPart(e):upsertPart(ensureStepStartPart(e,t.data.stepIndex),{state:`done`,stepIndex:t.data.stepIndex,text:t.data.message,type:`text`}));case`result.completed`:return updateAssistantMetadata(e,t.data.turnId,{result:t.data.result});case`turn.completed`:return updateAssistantMetadata(e,t.data.turnId,{status:`complete`});case`turn.failed`:case`session.failed`:return e;default:return e}}function respondToInputRequest(e,t){let n=findToolPartByApprovalId(e,t.requestId);if(!n)return e;let r={id:t.requestId};return t.text!==void 0&&(r.reason=t.text),updateToolPart(e,n.toolCallId,{approval:r,input:n.input,state:`approval-responded`,stepIndex:n.stepIndex,toolCallId:n.toolCallId,toolMetadata:mergeToolMetadata(n.toolMetadata,{eve:{inputResponse:t,kind:n.toolMetadata?.eve?.kind??`unknown`,name:n.toolMetadata?.eve?.name??n.toolName}}),toolName:n.toolName,type:`dynamic-tool`})}function updateAssistantMessage(e,t,n){return upsertMessage(e,n(e.messages.find(e=>e.role===`assistant`&&e.metadata?.turnId===t)??createAssistantMessage(t)))}function updateAssistantMetadata(e,t,n){return updateAssistantMessage(e,t,e=>({...e,metadata:{...e.metadata,...n}}))}function createAssistantMessage(e){return{id:`${e}:assistant`,metadata:{status:`streaming`,turnId:e},parts:[],role:`assistant`}}function ensureStepStartPart(e,t){let n=e.parts.filter(e=>e.type===`step-start`).length;if(n>t)return e;let r=t-n+1;return{...e,parts:[...e.parts,...Array.from({length:r},()=>({type:`step-start`}))]}}function upsertPart(e,t){let n=e.parts.findIndex(e=>partKey(e)===partKey(t)),r=n===-1?[...e.parts,t]:[...e.parts.slice(0,n),t,...e.parts.slice(n+1)];return{...e,metadata:{...e.metadata,status:t.type===`text`&&t.state===`done`?`complete`:`streaming`},parts:r}}function completeExistingTextPart(e){let t=findLastIndex(e.parts,e=>e.type===`text`);if(t===-1)return e;let n=e.parts[t];return n?.type===`text`?{...e,metadata:{...e.metadata,status:`complete`},parts:[...e.parts.slice(0,t),{...n,state:`done`},...e.parts.slice(t+1)]}:e}function updateToolPart(e,t,n){let r=e.messages.find(e=>e.role===`assistant`&&e.parts.some(e=>e.type===`dynamic-tool`&&e.toolCallId===t));return r?upsertMessage(e,upsertPart(r,n)):e}function findToolPart(e,t){for(let n of e.messages)for(let e of n.parts)if(e.type===`dynamic-tool`&&e.toolCallId===t)return e}function findToolPartByApprovalId(e,t){for(let n of e.messages)for(let e of n.parts)if(e.type===`dynamic-tool`&&e.approval?.id===t)return e}function partKey(e){switch(e.type){case`text`:return`text:${e.stepIndex??0}`;case`reasoning`:return`reasoning:${e.stepIndex??0}`;case`step-start`:return`step-start`;case`dynamic-tool`:return`dynamic-tool:${e.toolCallId}`}}function upsertMessage(e,t){let n=e.messages.findIndex(e=>e.id===t.id);return n===-1?{messages:[...e.messages,t]}:{messages:[...e.messages.slice(0,n),t,...e.messages.slice(n+1)]}}function toMessageInputRequest(e){return{allowFreeform:e.allowFreeform,display:e.display,options:e.options,prompt:e.prompt,requestId:e.requestId}}function createToolMetadata(e,t){return{eve:{inputRequest:t?.inputRequest,kind:e.kind,name:e.name}}}function mergeToolMetadata(e,t){let n=t.eve?.kind??e?.eve?.kind??`unknown`,r=t.eve?.name??e?.eve?.name??`unknown`;return{eve:{...e?.eve,...t.eve,inputRequest:t.eve?.inputRequest??e?.eve?.inputRequest,inputResponse:t.eve?.inputResponse??e?.eve?.inputResponse,kind:n,name:r}}}function approvedApproval(e){if(e?.approval?.id)return{approved:!0,id:e.approval.id,isAutomatic:e.approval.isAutomatic,reason:e.approval.reason}}function normalizeActionRequest(e){switch(e.kind){case`load-skill`:return{kind:`load-skill`,name:`load_skill`,toolName:`eve:load-skill`};case`tool-call`:return{kind:`tool-call`,name:e.toolName,toolName:e.toolName};case`subagent-call`:return{kind:`subagent-call`,name:e.subagentName,toolName:`eve:subagent:${e.subagentName}`};case`remote-agent-call`:return{kind:`subagent-call`,name:e.remoteAgentName,toolName:`eve:subagent:${e.remoteAgentName}`}}}function normalizeActionResult(e){switch(e.kind){case`load-skill-result`:return{kind:`load-skill`,name:e.name??`load_skill`,toolName:`eve:load-skill`};case`tool-result`:return{kind:`tool-call`,name:e.toolName,toolName:e.toolName};case`subagent-result`:return{kind:`subagent-call`,name:e.subagentName,toolName:`eve:subagent:${e.subagentName}`}}}function optimisticUserMessageId(e){return`optimistic:${e}:user`}function stringifyUnknown(e){if(typeof e==`string`)return e;try{return JSON.stringify(e)}catch{return`Action failed.`}}function findLastIndex(e,t){for(let n=e.length-1;n>=0;--n)if(t(e[n]))return n;return-1}export{defaultMessageReducer};