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import { convertToCamelCase } from '~/lib/utils/text_utility';
export const serializeFormEntries = (entries) =>
entries.reduce((acc, { name, value }) => Object.assign(acc, { [name]: value }), {});
export const serializeForm = (form) => {
const fdata = new FormData(form);
const entries = Array.from(fdata.keys()).map((key) => {
let val = fdata.getAll(key);
// Microsoft Edge has a bug in FormData.getAll() that returns an undefined
// value for each form element that does not match the given key:
// https://github.com/jimmywarting/FormData/issues/80
val = val.filter((n) => n);
return { name: key, value: val.length === 1 ? val[0] : val };
});
return serializeFormEntries(entries);
};
/**
* Check if the value provided is empty or not
*
* It is being used to check if a form input
* value has been set or not
*
* @param {String, Number, Array} - Any form value
* @returns {Boolean} - returns false if a value is set
*
* @example
* returns true for '', [], null, undefined
*/
export const isEmptyValue = (value) => value == null || value.length === 0;
/**
* A form object serializer
*
* @param {Object} - Form Object
* @returns {Object} - Serialized Form Object
*
* @example
* Input
* {"project": {"value": "hello", "state": false}, "username": {"value": "john"}}
*
* Returns
* {"project": "hello", "username": "john"}
*/
export const serializeFormObject = (form) =>
Object.fromEntries(
Object.entries(form).reduce((acc, [name, { value }]) => {
if (!isEmptyValue(value)) {
acc.push([name, value]);
}
return acc;
}, []),
);
/**
* Parse inputs of HTML forms generated by Rails.
*
* This can be helpful when mounting Vue components within Rails forms.
*
* If called with an HTML element like:
*
* ```html
* <input type="text" placeholder="Email" value="foo@bar.com" name="user[contact_info][email]" id="user_contact_info_email" data-js-name="contactInfoEmail">
* <input type="text" placeholder="Phone" value="(123) 456-7890" name="user[contact_info][phone]" id="user_contact_info_phone" data-js-name="contactInfoPhone">
* <input type="checkbox" name="user[interests][]" id="user_interests_vue" value="Vue" checked data-js-name="interests">
* <input type="checkbox" name="user[interests][]" id="user_interests_graphql" value="GraphQL" data-js-name="interests">
* ```
*
* It will return an object like:
*
* ```javascript
* {
* contactInfoEmail: {
* name: 'user[contact_info][email]',
* id: 'user_contact_info_email',
* value: 'foo@bar.com',
* placeholder: 'Email',
* },
* contactInfoPhone: {
* name: 'user[contact_info][phone]',
* id: 'user_contact_info_phone',
* value: '(123) 456-7890',
* placeholder: 'Phone',
* },
* interests: [
* {
* name: 'user[interests][]',
* id: 'user_interests_vue',
* value: 'Vue',
* checked: true,
* },
* {
* name: 'user[interests][]',
* id: 'user_interests_graphql',
* value: 'GraphQL',
* checked: false,
* },
* ],
* }
* ```
*
* @param {HTMLInputElement} mountEl
* @returns {Object} object with form fields data.
*/
export const parseRailsFormFields = (mountEl) => {
if (!mountEl) {
throw new TypeError('`mountEl` argument is required');
}
const inputs = mountEl.querySelectorAll('[name]');
return [...inputs].reduce((accumulator, input) => {
const fieldName = input.dataset.jsName;
if (!fieldName) {
return accumulator;
}
const fieldNameCamelCase = convertToCamelCase(fieldName);
const { id, placeholder, name, value, type, checked, maxLength, pattern } = input;
const attributes = {
name,
id,
value,
...(placeholder && { placeholder }),
...(input.hasAttribute('maxlength') && { maxLength }),
...(pattern && { pattern }),
};
// Store radio buttons and checkboxes as an array so they can be
// looped through and rendered in Vue
if (['radio', 'checkbox'].includes(type)) {
return {
...accumulator,
[fieldNameCamelCase]: [
...(accumulator[fieldNameCamelCase] || []),
{ ...attributes, checked },
],
};
}
return {
...accumulator,
[fieldNameCamelCase]: attributes,
};
}, {});
};
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