rheinsw-mono-repo/internal_frontend/services/customers/usecases/addCustomer.ts

import {CreateCustomerDto} from "@/services/customers/dtos/createCustomer.dto";
import {UUID} from "node:crypto";

export async function addCustomer(params: CreateCustomerDto): Promise<void> {
    const {email, name, companyName, street, zip, city, phoneNumbers, notes} = params;

    const payload: CreateCustomerDto = {
        email,
        name,
        companyName,
        street,
        zip,
        city,
        phoneNumbers,
        notes: notes.map(({text}) => ({text})),
    };

    const res = await fetch('/api/customers', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify(payload),
    });

    const contentType = res.headers.get("content-type") ?? "";
    const isJson = contentType.includes("application/json");

    const rawBody = isJson ? await res.json() : await res.text();

    console.log(`[api /api/customers] Response:`, res.status, rawBody);

    if (!res.ok) {
        const errorMessage = isJson
            ? (rawBody?.message ?? rawBody?.errors?.join(", ")) ?? "Unbekannter Fehler"
            : String(rawBody);
        
        // Log correlation ID if available for debugging
        if (isJson && rawBody?.correlationId) {
            console.error(`[api /api/customers] Error occurred [${rawBody.correlationId}]:`, errorMessage);
        }
        
        throw new Error(errorMessage);
    }

    const response = rawBody as UUID;
    console.log(response);
}