import { isJSONArray, isJSONObject, TypeValidationError, UnsupportedFunctionalityError, type JSONObject, type JSONSchema7, type JSONValue, } from '@ai-sdk/provider'; import { asSchema, safeValidateTypes, type FlexibleSchema, type Schema, type ValidationResult, } from '@ai-sdk/provider-utils'; import { NoObjectGeneratedError } from '../error/no-object-generated-error'; import type { FinishReason, LanguageModelResponseMetadata, LanguageModelUsage, } from '../types'; import { createAsyncIterableStream, type AsyncIterableStream, } from '../util/async-iterable-stream'; import type { DeepPartial } from '../util/deep-partial'; import type { ObjectStreamPart } from './stream-object-result'; export interface OutputStrategy { readonly type: 'object' | 'array' | 'enum' | 'no-schema'; jsonSchema(): Promise; validatePartialResult({ value, textDelta, isFinalDelta, }: { value: JSONValue; textDelta: string; isFirstDelta: boolean; isFinalDelta: boolean; latestObject: PARTIAL | undefined; }): Promise< ValidationResult<{ partial: PARTIAL; textDelta: string; }> >; validateFinalResult( value: JSONValue | undefined, context: { text: string; response: Omit; usage: LanguageModelUsage; }, ): Promise>; createElementStream( originalStream: ReadableStream>, ): ELEMENT_STREAM; } const noSchemaOutputStrategy: OutputStrategy = { type: 'no-schema', jsonSchema: async () => undefined, async validatePartialResult({ value, textDelta }) { return { success: true, value: { partial: value, textDelta } }; }, async validateFinalResult( value: JSONValue | undefined, context: { text: string; response: LanguageModelResponseMetadata; usage: LanguageModelUsage; finishReason: FinishReason; }, ): Promise> { return value === undefined ? { success: false, error: new NoObjectGeneratedError({ message: 'No object generated: response did not match schema.', text: context.text, response: context.response, usage: context.usage, finishReason: context.finishReason, }), } : { success: true, value }; }, createElementStream() { throw new UnsupportedFunctionalityError({ functionality: 'element streams in no-schema mode', }); }, }; const objectOutputStrategy =