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const isEmpty = value => value === undefined || value === null || value === ''; // eslint-disable-line
const join = (rules) => (value, data) => rules.map(rule => rule(value, data)).filter(error => !!error)[0]; // eslint-disable-line
export function email(value) { // eslint-disable-line
// Let's not start a debate on email regex. This is just for an example app!
if (!isEmpty(value) && !/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value)) {
return 'Invalid email address';
}
}
export function required(value) { // eslint-disable-line
if (isEmpty(value)) {
return 'Required';
}
}
export function minLength(min) {
return (value) => { // eslint-disable-line
if (!isEmpty(value) && value.length < min) {
return `Must be at least ${min} characters`;
}
};
}
export function maxLength(max) {
return value => { // eslint-disable-line
if (!isEmpty(value) && value.length > max) {
return `Must be no more than ${max} characters`;
}
};
}
export function integer(value) { // eslint-disable-line
if (!Number.isInteger(Number(value))) {
return 'Must be an integer';
}
}
export function oneOf(enumeration) {
return (value) => { // eslint-disable-line
if (!~enumeration.indexOf(value)) { // eslint-disable-line
return `Must be one of: ${enumeration.join(', ')}`;
}
};
}
export function match(field) {
return (value, data) => { // eslint-disable-line
if (data) {
if (value !== data[field]) {
return 'Do not match';
}
}
};
}
export function phone(value) { // eslint-disable-line
if (!/^(\d|\+)[0-9+() -]+$/.test(value)) {
return 'Invalid phone format';
}
}
export function createValidator(rules, section, activate) {
return (data = {}) => {
data = data.toJS ? data.toJS() : data; // eslint-disable-line
data = section && data.section ? data[section] : data; // eslint-disable-line
if (activate && typeof data[activate] !== 'undefined') {
if (!data[activate]) {
return {};
}
}
const errors = {};
Object.keys(rules).forEach((key) => {
const rule = join([].concat(rules[key])); // concat enables both functions and arrays of functions
const error = rule(data[key], data);
if (error) {
errors[key] = error;
}
});
return errors;
};
}
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