Perch Field type to chose a page in a selectize

examples_template.html

<!-- In admin show all pages from the parent page venue (Uses path not name) -->
<perch:content id="pages" type="page_list" label="Pages" parent="venues" suppress/>

<!-- In admin show all pages and limit to 1 selection -->
<perch:content id="pages" type="page_list" label="Pages" max="1" suppress/>


<!-- Output the page path in template -->
<perch:content id="pages" type="page_list" output="pagePath" />

<!-- Output the page title in template -->
<perch:content id="pages" type="page_list" output="pageTitle" />

page_list.class.php

<?php

/**
 * Class PerchFieldType_Page_List
 *
 * A field type for allowing users to select multiple pages that can be filtered by parent pages
 *
 * Examples:
 * <perch:content id="pages" type="page_list" label="Pages" parent="venues" />
 *
 * @author Byron Fitzgerald <byron@rootstudio.co.uk>
 * @version 1.0.0
 */
class PerchFieldType_Page_List extends PerchAPI_FieldType {
    /**
     * Render the input in the admin interface
     *
     * @param array $details
     *
     * @return string
     */
    public function render_inputs($details = []) {
        $PerchPages = new PerchContent_Pages();
        $pages = [];
        if ($parent = $this->Tag->parent()) {
            PerchUtil::mark(json_encode($PerchPages->find_by_path('/' . $parent)));
            if ($parent = $PerchPages->find_by_path('/' . $parent)) {
                $pages = $PerchPages->get_by_parent($parent->id());
            }
        } else {
            $pages = $PerchPages->all();
        }
        $opts = [];
        if (PerchUtil::count($pages)) {
            foreach ($pages as $Item) {
                $opts[] = [
                    'label' => $Item->pageTitle(),
                    'value' => $Item->id()
                ];
            }
        }

        return $this->render_select($details, $opts);
    }

    private function render_select($details, $opts) {
        $attributes = $this->Tag->get_data_attribute_string();
        $attributes .= ' data-display-as="categories"';
        if ($this->Tag->max()) {
            $attributes .= ' data-max="' . (int) $this->Tag->max() . '"';
        }
        $attributes = trim($attributes);

        return $this->Form->select($this->Tag->input_id(), $opts, $this->Form->get($details, $this->Tag->id(), $this->Tag->default(), $this->Tag->post_prefix()), 'input-simple categories ' . $this->Tag->size('xxl'), true, $attributes) . $this->render_field_annotations();
    }

    public function get_raw($post = false, $Item = false) {

        if ($post === false) {
            $post = PerchRequest::post();
        }
        $id = $this->Tag->id();
        if (isset($post[$id])) {
            $this->raw_item = $post[$id];

            if(is_array($this->raw_item)) {
                $this->raw_item = implode(', ', $this->raw_item);
            }
            PerchUtil::debug($this->raw_item);

            return $this->raw_item;
        }
    }

    public function get_search_text($raw = false) {
        if ($raw === false) $raw = $this->get_raw();

        return null;
        if (is_array($raw) && count($raw)) {
            $out = [];
            $PerchPages = new PerchContent_Pages();
            if ($parent = $this->Tag->parent()) {
                PerchUtil::mark(json_encode($PerchPages->find_by_path('/' . $parent)));
                if ($parent = $PerchPages->find_by_path('/' . $parent)) {
                    $pages = $PerchPages->get_by_parent($parent->id());
                }
            } else {
                $pages = $PerchPages->all();
            }
            foreach ($raw as $itemID) {
                $Cat = $Categories->find((int) $itemID);
                $out[] = $Cat->catTitle();
            }

            return implode(', ', $out);
        }

        return $raw;
    }

    public function render_admin_listing($raw = false) {
        return PerchUtil::html($this->get_search_text($raw));
    }

    public function get_index($raw = false) {
        PerchUtil::mark(json_encode($raw));
        if ($raw === false) $raw = $this->get_raw();
        $id = $this->Tag->id();
        PerchUtil::mark($id);
        $out = [];
        if (is_array($raw)) {
            $Blog = new PerchBlog_Posts();
            $out = $Blog->find_by_slug($this->Tag->post(), $raw, $id);
        }

        return $out;
    }

    public function get_processed($raw = false) {
        $pages = new PerchContent_Pages();
        if ($this->Tag->output) {
            $item = $pages->find($raw[0]);
            if ($item) {
                PerchUtil::mark(json_encode($item));
                $field = $this->Tag->output;

                return $item->{$field}();
            } else {
                return '';
            }
        }

        return '';
    }

    public function get_content_summary($details = [], $Template) {
        $pages = new PerchContent_Pages();
        if ($this->Tag->output) {
            $item = $pages->find($details);
            if ($item) {
                PerchUtil::mark(json_encode($item));
                $field = $this->Tag->output;

                return $item->{$field}();
            } else {
                return '';
            }
        }

        return '';
    }
}