clients/src/models/response/baseResponse.ts

export abstract class BaseResponse {
    protected response: any;

    constructor(response: any) {
        this.response = response;
    }

    protected getResponseProperty(propertyName: string, response: any = null, exactName = false): any {
        if (propertyName == null || propertyName === '') {
            throw new Error('propertyName must not be null/empty.');
        }
        if (response == null && this.response != null) {
            response = this.response;
        } else {
            return null;
        }
        if (!exactName && response[propertyName] === undefined) {
            let otherCasePropertyName: string = null;
            if (propertyName.charAt(0) === propertyName.charAt(0).toUpperCase()) {
                otherCasePropertyName = propertyName.charAt(0).toLowerCase();
            } else {
                otherCasePropertyName = propertyName.charAt(0).toUpperCase();
            }
            if (propertyName.length > 1) {
                otherCasePropertyName += propertyName.slice(1);
            }

            propertyName = otherCasePropertyName;
            if (response[propertyName] === undefined) {
                propertyName = propertyName.toLowerCase();
            }
            if (response[propertyName] === undefined) {
                propertyName = propertyName.toUpperCase();
            }
        }
        return response[propertyName];
    }
}