Add Items to JSONSchemaDefine for JsonTypeArray.

[ryomak]

In the current version (v1.11.0), when trying to use the JsonTypeArray in FunctionCall, it is not possible to define the array type, resulting in a 400 error.

I propose adding Items to JSONSchemaDefine. This would allow the array type to be specified and would eliminate the aforementioned error.

Could you please have a moment to take a look at it?

example

func main() {
	ctx := context.Background()
	c := openai.NewClient("key")
	response, err := c.CreateChatCompletion(ctx, openai.ChatCompletionRequest{
		Model: openai.GPT40613,
		Messages: []openai.ChatCompletionMessage{
			{
				Role:    openai.ChatMessageRoleUser,
				Content: "「What is the weather like in Boston?」Break down the above sentence into words",
			},
		},
		N:                0,
		Stream:           false,
		Stop:             nil,
		MaxTokens:        1024,
		PresencePenalty:  0,
		FrequencyPenalty: 0,
		LogitBias:        nil,
		Functions: []*openai.FunctionDefine{
			{
				Name:        "split_word",
				Description: "Break sentences into words",
				Parameters: &openai.FunctionParams{
					Type: openai.JSONSchemaTypeObject,
					Properties: map[string]*openai.JSONSchemaDefine{
						"list": {
							Type: openai.JSONSchemaTypeArray,
							Items: &openai.JSONSchemaDefine{
								Type: openai.JSONSchemaTypeString,
							},
							Description: "word list",
						},
						"count": {
							Type:        openai.JSONSchemaTypeNumber,
							Description: "word count",
						},
					},
					Required: []string{"list", "count"},
				},
			},
		},
	})
	if err != nil {
		panic(err)
	}
	if response.Choices[0].FinishReason != openai.FinishReasonFunctionCall {
		panic(err)
	}
	fmt.Println(response.Choices[0].Message.FunctionCall.Arguments)
}

/*
output: 
{
  "count": 7,
  "list": ["What", "is", "the", "weather", "like", "in", "Boston?"]
}
*/

referrence

https://json-schema.org/understanding-json-schema/reference/array.html#id6

[codecov]

Codecov Report

Merging #375 (ffbdff2) into master (0bd14f9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #375   +/-   ##
=======================================
  Coverage   95.22%   95.22%           
=======================================
  Files          17       17           
  Lines         670      670           
=======================================
  Hits          638      638           
  Misses         22       22           
  Partials       10       10           

Impacted Files	Coverage Δ
chat.go	100.00% <ø> (ø)

[vvatanabe]

duplicate of #373