generator-begcode/dist/generators/server/support/string.js

Spring Boot + Angular/React/Vue in one handy generator

export function hibernateSnakeCase(value) {
    let res = '';
    if (value) {
        if (value.length === 1) {
            return value.toLowerCase();
        }
        value = value.replace('.', '_');
        res = value[0];
        for (let i = 1, len = value.length - 1; i < len; i++) {
            if (value[i - 1] !== value[i - 1].toUpperCase() &&
                value[i] !== value[i].toLowerCase() &&
                value[i + 1] !== value[i + 1].toUpperCase()) {
                res += `_${value[i]}`;
            }
            else {
                res += value[i];
            }
        }
        res += value[value.length - 1];
        res = res.toLowerCase();
    }
    return res;
}