fan.tool.ts•8.41 kB
/**
* Fan Control Tool for Home Assistant
*
* This tool allows controlling fans in Home Assistant.
* Supports turning on/off, speed control, direction, and oscillation.
*/
import { z } from "zod";
import { logger } from "../../utils/logger.js";
import { get_hass } from "../../hass/index.js";
import { Tool } from "../../types/index.js";
// Real Home Assistant API service
class HomeAssistantFanService {
async getFans(): Promise<Record<string, unknown>[]> {
try {
const hass = await get_hass();
const states = await hass.getStates();
return states
.filter(state => state.entity_id.startsWith('fan.'))
.map(state => ({
entity_id: state.entity_id,
state: state.state,
attributes: state.attributes
}));
} catch (error) {
logger.error('Failed to get fans from HA:', error);
return [];
}
}
async getFan(entity_id: string): Promise<Record<string, unknown> | null> {
try {
const hass = await get_hass();
const state = await hass.getState(entity_id);
return {
entity_id: state.entity_id,
state: state.state,
attributes: state.attributes
};
} catch (error) {
logger.error(`Failed to get fan ${entity_id} from HA:`, error);
return null;
}
}
async callService(service: string, entity_id: string, data: Record<string, unknown> = {}): Promise<boolean> {
try {
const hass = await get_hass();
const serviceData = { entity_id, ...data };
await hass.callService('fan', service, serviceData);
return true;
} catch (error) {
logger.error(`Failed to call service ${service} on ${entity_id}:`, error);
return false;
}
}
}
// Singleton instance
const haFanService = new HomeAssistantFanService();
// Define the schema for our tool parameters using Zod
const fanControlSchema = z.object({
action: z.enum([
"list",
"get",
"turn_on",
"turn_off",
"toggle",
"set_percentage",
"set_preset_mode",
"oscillate",
"set_direction"
]).describe("The action to perform"),
entity_id: z.string().optional().describe("The entity ID of the fan (required for most actions)"),
percentage: z.number().min(0).max(100).optional().describe("Speed percentage between 0 and 100 (for set_percentage)"),
preset_mode: z.string().optional().describe("Preset mode name like 'auto', 'smart', 'eco' (for set_preset_mode)"),
oscillating: z.boolean().optional().describe("Whether to oscillate (for oscillate action)"),
direction: z.enum(["forward", "reverse"]).optional().describe("Fan direction (for set_direction)")
});
type FanControlInput = z.infer<typeof fanControlSchema>;
// Main tool execution function
async function execute(params: FanControlInput): Promise<string> {
const { action, entity_id, percentage, preset_mode, oscillating, direction } = params;
try {
switch (action) {
case "list": {
const fans = await haFanService.getFans();
return JSON.stringify({
success: true,
fans: fans,
count: fans.length
}, null, 2);
}
case "get": {
if (!entity_id) {
return JSON.stringify({ success: false, error: "entity_id is required for get action" });
}
const fan = await haFanService.getFan(entity_id);
if (!fan) {
return JSON.stringify({ success: false, error: `Fan ${entity_id} not found` });
}
return JSON.stringify({ success: true, fan: fan }, null, 2);
}
case "turn_on":
case "turn_off":
case "toggle": {
if (!entity_id) {
return JSON.stringify({ success: false, error: `entity_id is required for ${action} action` });
}
const success = await haFanService.callService(action, entity_id);
return JSON.stringify({
success,
message: success ? `Successfully executed ${action} on ${entity_id}` : `Failed to execute ${action} on ${entity_id}`
});
}
case "set_percentage": {
if (!entity_id) {
return JSON.stringify({ success: false, error: "entity_id is required for set_percentage action" });
}
if (percentage === undefined) {
return JSON.stringify({ success: false, error: "percentage is required for set_percentage action" });
}
const success = await haFanService.callService("set_percentage", entity_id, { percentage });
return JSON.stringify({
success,
message: success ? `Successfully set fan speed to ${percentage}% on ${entity_id}` : `Failed to set fan speed on ${entity_id}`
});
}
case "set_preset_mode": {
if (!entity_id) {
return JSON.stringify({ success: false, error: "entity_id is required for set_preset_mode action" });
}
if (!preset_mode) {
return JSON.stringify({ success: false, error: "preset_mode is required for set_preset_mode action" });
}
const success = await haFanService.callService("set_preset_mode", entity_id, { preset_mode });
return JSON.stringify({
success,
message: success ? `Successfully set preset mode to ${preset_mode} on ${entity_id}` : `Failed to set preset mode on ${entity_id}`
});
}
case "oscillate": {
if (!entity_id) {
return JSON.stringify({ success: false, error: "entity_id is required for oscillate action" });
}
if (oscillating === undefined) {
return JSON.stringify({ success: false, error: "oscillating is required for oscillate action" });
}
const success = await haFanService.callService("oscillate", entity_id, { oscillating });
return JSON.stringify({
success,
message: success ? `Successfully ${oscillating ? 'enabled' : 'disabled'} oscillation on ${entity_id}` : `Failed to set oscillation on ${entity_id}`
});
}
case "set_direction": {
if (!entity_id) {
return JSON.stringify({ success: false, error: "entity_id is required for set_direction action" });
}
if (!direction) {
return JSON.stringify({ success: false, error: "direction is required for set_direction action" });
}
const success = await haFanService.callService("set_direction", entity_id, { direction });
return JSON.stringify({
success,
message: success ? `Successfully set fan direction to ${direction} on ${entity_id}` : `Failed to set fan direction on ${entity_id}`
});
}
default:
return JSON.stringify({ success: false, error: `Unknown action: ${action}` });
}
} catch (error) {
logger.error("Error in fan control tool:", error);
return JSON.stringify({
success: false,
error: error instanceof Error ? error.message : "Unknown error occurred"
});
}
}
// Export the tool object
export const fanControlTool: Tool = {
name: "fan_control",
description: "Control fans in Home Assistant. Supports turning on/off, speed control via percentage, preset modes, oscillation, and direction control. Actions include: list (get all fans), get (get specific fan info), turn_on, turn_off, toggle, set_percentage, set_preset_mode, oscillate, and set_direction.",
parameters: fanControlSchema,
execute
};