zendesk_autopopulate_fields.js

## zendesk_autopopulate_fields.js
/**
 * Automatically populates Zendesk public-facing "new ticket" fields
 * on page load.
 *
 * To use, copy and paste into your New Request Page template (wrapped
 * in a `<script></script>` tag).
 *
 * For most fields, just use the field name (so if the field is
 * `request[subject]`, use `subject` in the URL, while
 * `request[custom_fields][123456]` becomes `123456`). You can also use
 * `email` instead of `anonymous_requester_email`. For custom field
 * dropdowns, specify the value, not the label (so something like
 * `my_value` rather than `My Value`).
 *
 * You can also map custom fields to arbitrary names via the `aliases`
 * object below.
 *
 * Example URL:
 *
 *     /hc/en-us/requests/new?email=test@test.com&subject=Example+Subject
 */
(function ($) {
	// This is the only portion of the script you might wish to edit.
	// It maps custom field numeric IDs to custom names you can use
	// in the URL. So in the example below, `?custom_name=test` would
	// set `#request_custom_fields_123` to `test`.
	var aliases = {
		'custom_name': '123'
	}
	// You should not need to edit anything past this point
	var parsedQueryString = function () {
		var segments = window.location.search.substr(1).replace(/\+/g, ' ').split('&'),
			parsed = {};
		if (!segments) return parsed;
		for (var i = 0, count = segments.length; i < count; i++) {
			var parts = segments[i].split('='),
				key = parts.shift(),
				value = parts.length ? decodeURIComponent(parts.join('=')) : null;
			parsed[key] = value;
		}
		return parsed;
	}
	$(document).ready(function () {
		var query = parsedQueryString();
		for (var key in query) {
			if (!query.hasOwnProperty(key) || key == 'ticket_form_id') continue;
			var prefix = '#request_',
				value = query[key];
			if (typeof aliases[key] !== 'undefined') {
				key = aliases[key];
			}
			if (key == 'email') {
				prefix += 'anonymous_requester_';
			} else if (/^\d+$/.test(key)) {
				prefix += 'custom_fields_';
			}
			var field = $(prefix + key),
				data = field.attr('data-tagger');
			if (data) {
				data = JSON.parse(data);
				var label = '';
				if (!value) {
					label = data[0].label;
				} else {
					for (var i = 0, count; i < data.length; i++) {
						if (data[i].value == value) {
							label = data[i].label;
							break;
						}
					}
				}
				field.val(value).closest('.nesty-input').text(label);
			} else {
				field.val(value);
			}
		}
	})
})(jQuery)