Implement the add existing search button.

README.md

@@ -1,6 +1,10 @@
 SilverStripe Grid Field Extensions Module
 =========================================
 
+This module provides a number of useful grid field components:
+
+* `GridFieldAddExistingSearchButton` - a more advanced search form for adding items.
+
 Maintainer Contacts
 -------------------
 *  Andrew Short (<andrewjshort@gmail.com>)

code/GridFieldAddExistingSearchButton.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * A modal search dialog which uses search context to search for and add
+ * existing records to a grid field.
+ */
+class GridFieldAddExistingSearchButton implements
+	GridField_HTMLProvider,
+	GridField_URLHandler {
+
+	protected $fragment;
+
+	/**
+	 * @param string $fragment
+	 */
+	public function __construct($fragment = 'before') {
+		$this->fragment = $fragment;
+	}
+
+	public function getHTMLFragments($grid) {
+		Requirements::css('gridfieldextensions/css/GridFieldExtensions.css');
+		Requirements::javascript('gridfieldextensions/javascript/GridFieldExtensions.js');
+
+		$data = new ArrayData(array(
+			'Link'  => $grid->Link('add-existing-search')
+		));
+
+		return array(
+			$this->fragment => $data->renderWith('GridFieldAddExistingSearchButton'),
+		);
+	}
+
+	public function getURLHandlers($grid) {
+		return array(
+			'add-existing-search' => 'handleSearch'
+		);
+	}
+
+	public function handleSearch($grid, $request) {
+		return new GridFieldAddExistingSearchHandler($grid, $this);
+	}
+
+}

code/GridFieldAddExistingSearchHandler.php

@@ -0,0 +1,102 @@
+<?php
+/**
+ * Used by {@link GridFieldAddExistingSearchButton} to provide the searching
+ * functionality.
+ */
+class GridFieldAddExistingSearchHandler extends RequestHandler {
+
+	public static $allowed_actions = array(
+		'index',
+		'add',
+		'SearchForm'
+	);
+
+	/**
+	 * @var GridField
+	 */
+	protected $grid;
+
+	/**
+	 * @var GridFieldAddExistingSearchButton
+	 */
+	protected $button;
+
+	/**
+	 * @var SearchContext
+	 */
+	protected $context;
+
+	public function __construct($grid, $button) {
+		$this->grid    = $grid;
+		$this->button  = $button;
+		$this->context = singleton($grid->getModelClass())->getDefaultSearchContext();
+
+		parent::__construct();
+	}
+
+	public function index() {
+		return $this->renderWith('GridFieldAddExistingSearchHandler');
+	}
+
+	public function add($request) {
+		if(!$id = $request->postVar('id')) {
+			$this->httpError(400);
+		}
+
+		$list = $this->grid->getList();
+		$item = DataList::create($list->dataClass())->byID($id);
+
+		if(!$item) {
+			$this->httpError(400);
+		}
+
+		$list->add($item);
+	}
+
+	/**
+	 * @return Form
+	 */
+	public function SearchForm() {
+		$form = new Form(
+			$this,
+			'SearchForm',
+			$this->context->getFields(),
+			new FieldList(
+				FormAction::create('doSearch', _t('GridFieldExtensions.SEARCH', 'Search'))
+					->setUseButtonTag(true)
+					->addExtraClass('ss-ui-button')
+					->setAttribute('data-icon', 'magnifier')
+			)
+		);
+
+		$form->addExtraClass('stacked add-existing-search-form');
+		$form->setFormMethod('GET');
+
+		return $form;
+	}
+
+	public function doSearch($data, $form) {
+		$list = $this->context->getResults($data);
+		$list = $list->subtract($this->grid->getList());
+		$list = new PaginatedList($list, $this->request);
+
+		$data = $this->customise(array(
+			'SearchForm' => $form,
+			'Items'      => $list
+		));
+		return $data->index();
+	}
+
+	public function Items() {
+		$list = DataList::create($this->grid->getList()->dataClass());
+		$list = $list->subtract($this->grid->getList());
+		$list = new PaginatedList($list, $this->request);
+
+		return $list;
+	}
+
+	public function Link($action = null) {
+		return Controller::join_links($this->grid->Link(), 'add-existing-search', $action);
+	}
+
+}

css/GridFieldExtensions.css

@@ -0,0 +1,55 @@
+/**
+ * GridFieldAddExistingSearchButton
+ */
+
+.add-existing-search-dialog {
+	min-width: inherit !important;
+}
+
+.add-existing-search-dialog .add-existing-search-form .field {
+	border: none;
+	box-shadow: none;
+	margin-bottom: 0;
+	padding-bottom: 0;
+}
+
+.add-existing-search-dialog .add-existing-search-form .field label {
+	padding-bottom: 4px;
+}
+
+.add-existing-search-dialog .add-existing-search-form .Actions {
+	margin-top: 10px;
+}
+
+.add-existing-search-dialog .add-existing-search-items li a {
+	background: #FFF;
+	border-bottom-width: 1px;
+	border-color: #CCC;
+	border-left-width: 1px;
+	border-right-width: 1px;
+	border-style: solid;
+	display: block;
+	padding: 6px;
+}
+
+.add-existing-search-dialog .add-existing-search-items li:first-child a {
+	border-radius: 4px 4px 0 0;
+	border-top-width: 1px;
+}
+
+.add-existing-search-dialog .add-existing-search-items li:last-child a {
+	border-radius: 0 0 4px 4px;
+}
+
+.add-existing-search-dialog .add-existing-search-items li a:hover {
+	background: #F4F4F4;
+}
+
+.add-existing-search-dialog .add-existing-search-pagination li {
+	background: #FFF;
+	display: block;
+	float: left;
+	margin-right: 2px;
+	margin-top: 12px;
+	padding: 6px;
+}

javascript/GridFieldExtensions.js

@@ -0,0 +1,75 @@
+(function($) {
+	$.entwine("ss", function($) {
+		/**
+		 * GridFieldAddExistingSearchButton
+		 */
+
+		$(".add-existing-search-dialog").entwine({
+			loadDialog: function(deferred) {
+				var dialog = this.addClass("loading").children(".ui-dialog-content").empty();
+
+				deferred.done(function(data) {
+					dialog.html(data).parent().removeClass("loading");
+				});
+			}
+		});
+
+		$(".ss-gridfield .add-existing-search").entwine({
+			onclick: function() {
+				var dialog = $("<div></div>").appendTo("body").dialog({
+					modal: true,
+					resizable: false,
+					width: 500,
+					height: 600,
+					close: function() {
+						$(this).dialog("destroy").remove();
+					}
+				});
+
+				dialog.parent().addClass("add-existing-search-dialog").loadDialog(
+					$.get(this.prop("href"))
+				);
+				dialog.data("grid", this.closest(".ss-gridfield"));
+
+				return false;
+			}
+		});
+
+		$(".add-existing-search-dialog .add-existing-search-form").entwine({
+			onsubmit: function() {
+				this.closest(".add-existing-search-dialog").loadDialog($.get(
+					this.prop("action"), this.serialize()
+				));
+				return false;
+			}
+		});
+
+		$(".add-existing-search-dialog .add-existing-search-items a").entwine({
+			onclick: function() {
+				var link = this.closest(".add-existing-search-items").data("add-link");
+				var id   = this.data("id");
+
+				var dialog = this.closest(".add-existing-search-dialog")
+				                 .addClass("loading")
+				                 .children(".ui-dialog-content")
+				                 .empty()
+
+				$.post(link, { id: id }, function() {
+					dialog.data("grid").reload();
+					dialog.dialog("close");
+				});
+
+				return false;
+			}
+		});
+
+		$(".add-existing-search-dialog .add-existing-search-pagination a").entwine({
+			onclick: function() {
+				this.closest(".add-existing-search-dialog").loadDialog($.get(
+					this.prop("href")
+				));
+				return false;
+			}
+		});
+	});
+})(jQuery);

templates/GridFieldAddExistingSearchButton.ss

@@ -0,0 +1,3 @@
+<a href="$Link" class="ss-ui-button ui-button add-existing-search" data-icon="magnifier">
+	<% _t("ADDEXISTING", "Add Existing") %>
+</a>

templates/GridFieldAddExistingSearchHandler.ss

@@ -0,0 +1,36 @@
+$SearchForm
+
+<h3><% _t("RESULTS", "Results") %></h3>
+<div class="add-existing-search-results">
+	<% if $Items %>
+		<ul class="add-existing-search-items" data-add-link="$Link('add')">
+			<% loop $Items %>
+				<li class="$EvenOdd"><a href="#" data-id="$ID">$Title</a></li>
+			<% end_loop %>
+		</ul>
+	<% else %>
+		<p><% _t("NOITEMS", "There are no items.") %></p>
+	<% end_if %>
+
+	<% if $Items.MoreThanOnePage %>
+		<ul class="add-existing-search-pagination">
+			<% if $Items.NotFirstPage %>
+				<li><a href="$Items.PrevLink">&laquo;</a></li>
+			<% end_if %>
+
+			<% loop $Items.PaginationSummary(4) %>
+				<% if $CurrentBool %>
+					<li class="current">$PageNum</li>
+				<% else_if $Link %>
+					<li><a href="$Link">$PageNum</a></li>
+				<% else %>
+					<li>&hellip;</li>
+				<% end_if %>
+			<% end_loop %>
+
+			<% if $Items.NotLastPage %>
+				<li><a href="$Items.NextLink">&raquo;</a></li>
+			<%end_if %>
+		</ul>
+	<% end_if %>
+</div>