Function: defineDiscriminatedHandlers()

Makaio Framework

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Makaio Framework / ai-adapters-core / defineDiscriminatedHandlers

Function: defineDiscriminatedHandlers()

defineDiscriminatedHandlers<TPayload, TDiscriminator>(discriminator, handlers): DiscriminatedHandlersConfig<TPayload, TDiscriminator>

Defined in: ../../../adapters/core/src/utils/discriminated-handlers.ts:143

Factory to create typed discriminated handlers.

This function provides compile-time validation that handlers receive correctly narrowed payload types based on the discriminator value.

Type Parameters

TPayload

TPayload extends Record<string, unknown>

TDiscriminator

TDiscriminator extends string = keyof TPayload & string

Parameters

discriminator

TDiscriminator

The property key used to discriminate union members

handlers

DiscriminatedHandlersMap<TPayload, TDiscriminator>

Map of discriminator values to handler functions

Returns

DiscriminatedHandlersConfig<TPayload, TDiscriminator>

Configuration object for use with processDiscriminatedItems

Example

// Define handlers with full type safety
const handlers = defineDiscriminatedHandlers<BetaContentBlock, 'type'>('type', {
  text: (block, emit) => {
    // block is narrowed to BetaTextBlock
    emit(AgentSubjects.message, { content: block.text });
  },
  thinking: (block, emit) => {
    // block is narrowed to BetaThinkingBlock
    emit(AgentSubjects.reasoning, { content: block.thinking });
  },
  tool_use: (block, emit) => {
    // block is narrowed to BetaToolUseBlock
    emit(AgentSubjects.tool.use, {
      toolName: block.name,
      args: block.input,
      toolCallId: block.id,
    });
  },
});