(Objective-C) Automatic JS AI Tool Calling with Supporting JS Sources

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Note: This example requires Chilkat v11.4.0 or greater.

For more information, see https://www.chilkatsoft.com/ai_javascript_tool_function_calling.asp

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#import <CkoStringBuilder.h>
#import <CkoAi.h>
#import <NSString.h>

BOOL success = NO;

// ----------------------------------------------------------------------------------
// The Javascript file loaded here is shown at the bottom of this page.
// -----------------------------------------------------------------------------------

// In this example, we'll load the Javascript tool functions and registry from a file.
CkoStringBuilder *sbJs = [[CkoStringBuilder alloc] init];
success = [sbJs LoadFile: @"qa_data/js_tools/toolset_5.js" charset: @"utf-8"];
if (success == NO) {
    NSLog(@"%@",sbJs.LastErrorText);
    return;
}

CkoAi *ai = [[CkoAi alloc] init];

// Additional JavaScript code can be loaded into the AI object's internal JS engine
// by calling RegisterJsTools with evalOnly = YES.
CkoStringBuilder *sbExtraJs = [[CkoStringBuilder alloc] init];
[sbExtraJs Append: @"function getOrderTotal({ order_id }) { return 149.95; }"];

// When evalOnly equals YES, it tells Chilkat that no toolRegistry will be present.
// The purpose for doing the eval is to add function definitions to the global namespace.
// The value passed for allowAllKeyword is meaningless (not used) when evalOnly = YES.
BOOL evalOnly = YES;
BOOL allowAllKeyword = YES;
[ai RegisterJsTools: sbExtraJs evalOnly: evalOnly allowAllKeyword: allowAllKeyword];

// Register the tools that will be made available to the AI.
evalOnly = NO;
[ai RegisterJsTools: sbJs evalOnly: evalOnly allowAllKeyword: allowAllKeyword];

// The provider can be "openai", "google", "claude", "grok", "mistral", "custom", etc.
ai.Provider = @"openai";
// Use your provider's API key.
ai.ApiKey = @"MY_API_KEY";
// Choose a model.
ai.Model = @"gpt-5-mini";

// Tool function calling must always occur within a conversation.
NSString *conversation_name = @"convo_4";
NSString *sysMessage = @"You are a helpful business assistant";
NSString *devMessage = @"Respond only with a information generated by a tool.";
[ai NewConvo: conversation_name sysMsg: sysMessage devMsg: devMessage];

// Provide inputs
[ai InputAddText: @"What is the total for order A123?"];

// Send inputs, tool functions, etc. and ask for a "text" response.
// If the AI responds with tool calls, Chilkat automatically handles them by calling your JavaScript
// tool functions as directed by the AI, and sending results back to the AI until the final
// response is received.
success = [ai Ask: @"text"];
if (success == NO) {
    NSLog(@"%@",ai.LastErrorText);
    return;
}

// Get the AI response.
CkoStringBuilder *sbResponse = [[CkoStringBuilder alloc] init];
[ai GetOutputTextSb: sbResponse];
NSLog(@"%@",[sbResponse GetAsString]);

// The namespace for the AI tool functions in this JavaScript source file.
Example = {};

// Tool functions must have only one argument, which should be an object.
// The function names used here must match the "name" in the toolRegistry below.

Example.get_order_total = function(arg) {
  // Here we are calling another function that is defined in a support (additional) JavaScript source
  // that was loaded in previous call to Ai.RegisterJsTools with evalOnly = true.
  return getOrderTotal(arg);
}

Example.multiply_numbers = function(arg) {
  return arg.a * arg.b;
}

// The inputSchema.type must ALWAYS be "object".
Example.toolRegistry = [
  {
    name: "get_order_total",
    description: "Calculate total cost of an order",
    parameters: {
      properties: {
        order_id: { type: "string", description: "The order ID" },
      }
    }
  },
  {
    name: "multiply_numbers",
    description: "Multiplies two numbers and returns the product.",
    parameters: {
      properties: {
        a: { type: "number", description: "First number" },
        b: { type: "number", description: "Second number" }
      }
    }
  }
];


Example.toolPermissions = [
	  {
	    name: "all",
	    perm: "sandbox",
	  }
	  		
	];
	
	
// Return the name of this toolset
// This tells Chilkat the namespace of this toolset.
"Example";