Grav-Admin-Plugin/themes/grav/app/forms/fields/array.js

import $ from 'jquery';

let body = $('body');

class Template {
    constructor(container) {
        this.container = $(container);

        if (this.getName() === undefined) {
            this.container = this.container.closest('[data-grav-array-name]');
        }
    }

    getName() {
        return this.container.data('grav-array-name') || '';
    }

    getKeyPlaceholder() {
        return this.container.data('grav-array-keyname') || 'Key';
    }

    getValuePlaceholder() {
        return this.container.data('grav-array-valuename') || 'Value';
    }

    isValueOnly() {
        return this.container.find('[data-grav-array-mode="value_only"]:first').length || false;
    }

    shouldBeDisabled() {
        // check for toggleables, if field is toggleable and it's not enabled, render disabled
        let toggle = this.container.closest('.form-field').find('[data-grav-field="toggleable"] input[type="checkbox"]');
        return toggle.length && toggle.is(':not(:checked)');
    }

    getNewRow() {
        let tpl = '';

        if (this.isValueOnly()) {
            tpl += `
            <div class="form-row array-field-value_only" data-grav-array-type="row">
                <input ${this.shouldBeDisabled() ? 'disabled="disabled"' : ''} data-grav-array-type="value" type="text" value="" placeholder="${this.getValuePlaceholder()}" />
            `;
        } else {
            tpl += `
            <div class="form-row" data-grav-array-type="row">
                <input ${this.shouldBeDisabled() ? 'disabled="disabled"' : ''} data-grav-array-type="key" type="text" value="" placeholder="${this.getKeyPlaceholder()}" />
                <input ${this.shouldBeDisabled() ? 'disabled="disabled"' : ''} data-grav-array-type="value" type="text" name="" value=""  placeholder="${this.getValuePlaceholder()}" />
            `;
        }

        tpl += `
            <span data-grav-array-action="rem" class="fa fa-minus"></span>
            <span data-grav-array-action="add" class="fa fa-plus"></span>
        </div>`;

        return tpl;
    }
}

export default class ArrayField {
    constructor() {
        body.on('input', '[data-grav-array-type="key"], [data-grav-array-type="value"]', (event) => this.actionInput(event));
        body.on('click touch', '[data-grav-array-action]', (event) => this.actionEvent(event));
    }

    actionInput(event) {
        let element = $(event.target);
        let type = element.data('grav-array-type');

        this._setTemplate(element);

        let template = element.data('array-template');
        let keyElement = type === 'key' ? element : element.siblings('[data-grav-array-type="key"]:first');
        let valueElement = type === 'value' ? element : element.siblings('[data-grav-array-type="value"]:first');

        let name = `${template.getName()}[${!template.isValueOnly() ? keyElement.val() : this.getIndexFor(element)}]`;
        valueElement.attr('name', !valueElement.val() ? template.getName() : name);

        this.refreshNames(template);
    }

    actionEvent(event) {
        event && event.preventDefault();
        let element = $(event.target);
        let action = element.data('grav-array-action');

        this._setTemplate(element);

        this[`${action}Action`](element);
    }

    addAction(element) {
        let template = element.data('array-template');
        let row = element.closest('[data-grav-array-type="row"]');

        row.after(template.getNewRow());
    }

    remAction(element) {
        let template = element.data('array-template');
        let row = element.closest('[data-grav-array-type="row"]');
        let isLast = !row.siblings().length;

        if (isLast) {
            let newRow = $(template.getNewRow());
            row.after(newRow);
            newRow.find('[data-grav-array-type="value"]:last').attr('name', template.getName());
        }

        row.remove();
        this.refreshNames(template);
    }

    refreshNames(template) {
        if (!template.isValueOnly()) { return; }

        let row = template.container.find('> div > [data-grav-array-type="row"]');
        let inputs = row.find('[name]:not([name=""])');

        inputs.each((index, input) => {
            input = $(input);
            let name = input.attr('name');
            name = name.replace(/\[\d+\]$/, `[${index}]`);
            input.attr('name', name);
        });

        if (!inputs.length) {
            row.find('[data-grav-array-type="value"]').attr('name', template.getName());
        }
    }

    getIndexFor(element) {
        let template = element.data('array-template');
        let row = element.closest('[data-grav-array-type="row"]');

        return template.container.find(`${template.isValueOnly() ? '> div ' : ''} > [data-grav-array-type="row"]`).index(row);
    }

    _setTemplate(element) {
        if (!element.data('array-template')) {
            element.data('array-template', new Template(element.closest('[data-grav-array-name]')));
        }
    }
}

export let Instance = new ArrayField();