yatra / resources / js / hooks / useTaxCalculation.ts

useTaxCalculation.ts in Yatra – Travel Booking & Tour Operator Software 3.0.15, at resources/js/hooks/useTaxCalculation.ts

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1	/**
2	* Tax Calculation Hook
3	*
4	* Provides tax calculation functionality for booking forms
5	*
6	* @package Yatra.Hooks
7	* @since 3.0.0
8	*/
9
10	import { useState, useEffect, useMemo } from "react";
11	import { taxService } from "../services/TaxService";
12
13	interface BookingTaxCalculation {
14	subtotal: number;
15	tax_amount: number;
16	total_amount: number;
17	tax_rate: number;
18	tax_inclusive: boolean;
19	taxes: Array<{
20	name: string;
21	rate: number;
22	amount: number;
23	formatted_amount: string;
24	formatted_rate: string;
25	}>;
26	tax_breakdown: string;
27	}
28
29	interface UseTaxCalculationOptions {
30	subtotal: number;
31	country?: string;
32	enabled?: boolean;
33	}
34
35	interface UseTaxCalculationReturn {
36	taxCalculation: BookingTaxCalculation \| null;
37	isLoading: boolean;
38	error: string \| null;
39	isTaxEnabled: boolean;
40	recalculateTax: () => void;
41	}
42
43	export const useTaxCalculation = ({
44	subtotal,
45	country,
46	enabled = true,
47	}: UseTaxCalculationOptions): UseTaxCalculationReturn => {
48	const [isLoading, setIsLoading] = useState(true);
49	const [error, setError] = useState<string \| null>(null);
50	const [taxSettingsLoaded, setTaxSettingsLoaded] = useState(false);
51
52	// Load tax settings
53	useEffect(() => {
54	const loadSettings = async () => {
55	try {
56	setIsLoading(true);
57	await taxService.loadTaxSettings();
58	setTaxSettingsLoaded(true);
59
60	// Validate tax configuration
61	const validation = taxService.validateTaxConfiguration();
62	if (!validation.valid) {
63	setError("Tax configuration error: " + validation.errors.join(", "));
64	}
65	} catch (err) {
66	setError("Failed to load tax settings");
67	} finally {
68	setIsLoading(false);
69	}
70	};
71
72	loadSettings();
73	}, []);
74
75	// Calculate tax when dependencies change
76	const taxCalculation = useMemo(() => {
77	if (!enabled \|\| !taxSettingsLoaded \|\| isLoading \|\| error) {
78	return null;
79	}
80
81	if (!taxService.isTaxEnabled()) {
82	return null;
83	}
84
85	try {
86	return taxService.calculateBookingTax(subtotal, country);
87	} catch (err) {
88	setError("Failed to calculate tax");
89	return null;
90	}
91	}, [subtotal, country, enabled, taxSettingsLoaded, isLoading, error]);
92
93	const recalculateTax = () => {
94	// Force recalculation by triggering a settings reload
95	setTaxSettingsLoaded(false);
96	taxService.loadTaxSettings().then(() => {
97	setTaxSettingsLoaded(true);
98	setError(null);
99	});
100	};
101
102	return {
103	taxCalculation,
104	isLoading,
105	error,
106	isTaxEnabled: taxService.isTaxEnabled(),
107	recalculateTax,
108	};
109	};
110