Step 5.2 – Administer static pages for our multilanguage CMS – editing the pages

(created at: April 02, 2015; last update: April 05, 2015)
We’ve created multilanguage pages, we’ve listed them, but what about editing them?

For this we will create a new method named edit(), which will receive the language slug and the page id.

We don’t have to worry about being lost in translations. Our method will first ask page_translation_model if there is a translation of the page in that particular language. If there is such a translation, the method will also make sure that there exists a page that the translation pretends it belongs to by asking the page_model.

$translation = $this->page_translation_model->where(array('page_id'=>$page_id, 'language_slug'=>$language_slug))->get();
$this->data['content_language'] = $this->langs[$language_slug]['name'];
if($translation == FALSE)
{
  $this->session->set_flashdata('message', 'There is no translation for that page.');
  redirect('admin/pages', 'refresh');
}
$page = $this->page_model->get($page_id);
if($page == FALSE)
{
  $this->session->set_flashdata('message', 'There is no page to translate.');
  redirect('admin/pages', 'refresh');
}

After we’ve made all the checks, we will pass all the needed data to the edit_view view:

$this->data['translation'] = $translation;
$this->data['page'] = $page;
$this->data['slugs'] = $this->slug_model->where(array('content_type'=>'page','translation_id'=>$translation->id))->get_all();
$pages = $this->page_translation_model->where(array('language_slug'=>$language_slug,'page_id !='=>$page_id))->order_by('menu_title')->fields('page_id,id,menu_title')->get_all();
$this->data['parent_pages'] = array('0'=>'No parent page');
if(!empty($pages))
{
  foreach($pages as $page)
  {
    $this->data['parent_pages'][$page->page_id] = $page->menu_title;
  }
}

As you can see, we’ve also interrogated the slug_model that we’ve created in a previous tutorial. So ,let’s make sure it is loaded inside the controller’s constructor:

class Pages extends Admin_Controller
{

  function __construct()
  {
    parent::__construct();
    if(!$this->ion_auth->in_group('admin'))
    {
      $this->session->set_flashdata('message','You are not allowed to visit the Pages page');
      redirect('admin','refresh');
    }
    $this->load->model('page_model');
    $this->load->model('page_translation_model');
    $this->load->model('slug_model');
    $this->load->model('language_model');
    $this->load->library('form_validation');
    $this->load->helper('text');
  }
  ...

Now, let’s get the rules and render the edit_view view if those rules are not respected:

$rules = $this->page_model->rules;
$this->form_validation->set_rules($rules['update']);
if($this->form_validation->run()===FALSE)
{
  $this->render('admin/pages/edit_view');
}

But we didn’t define the rules, so let’s return to our Page_model and update them:

    public $rules = array(
        'insert' => array(
            'parent_id' => array('field'=>'parent_id','label'=>'Parent ID','rules'=>'trim|is_natural|required'),
            'title' => array('field'=>'title','label'=>'Title','rules'=>'trim|required'),
            'menu_title' => array('field'=>'menu_title','label'=>'Menu title','rules'=>'trim'),
            'slug' => array('field'=>'slug', 'label'=>'Slug', 'rules'=>'trim'),
            'order' => array('field'=>'order','label'=>'Order','rules'=>'trim|is_natural|required'),
            'teaser' => array('field'=>'teaser','label'=>'Teaser','rules'=>'trim'),
            'content' => array('field'=>'content','label'=>'Content','rules'=>'trim'),
            'page_title' => array('field'=>'page_title','label'=>'Page title','rules'=>'trim'),
            'page_description' => array('field'=>'page_description','label'=>'Page description','rules'=>'trim'),
            'page_keywords' => array('field'=>'page_keywords','label'=>'Page keywords','rules'=>'trim'),
            'page_id' => array('field'=>'page_id', 'label'=>'Page ID', 'rules'=>'trim|is_natural|required'),
            'language_slug' => array('field'=>'language_slug','label'=>'language_slug','rules'=>'trim|required')
        ),
        'update' => array(
            'parent_id' => array('field'=>'parent_id','label'=>'Parent ID','rules'=>'trim|is_natural|required'),
            'title' => array('field'=>'title','label'=>'Title','rules'=>'trim|required'),
            'menu_title' => array('field'=>'menu_title','label'=>'Menu title','rules'=>'trim'),
            'slug' => array('field'=>'slug', 'label'=>'Slug', 'rules'=>'trim'),
            'order' => array('field'=>'order','label'=>'Order','rules'=>'trim|is_natural|required'),
            'teaser' => array('field'=>'teaser','label'=>'Teaser','rules'=>'trim'),
            'content' => array('field'=>'content','label'=>'Content','rules'=>'trim'),
            'page_title' => array('field'=>'page_title','label'=>'Page title','rules'=>'trim|required'),
            'page_description' => array('field'=>'page_description','label'=>'Page description','rules'=>'trim'),
            'page_keywords' => array('field'=>'page_keywords','label'=>'Page keywords','rules'=>'trim'),
            'translation_id' => array('field'=>'translation_id', 'label'=>'Translation ID', 'rules'=>'trim|is_natural_no_zero|required'),
            'page_id' => array('field'=>'page_id', 'label'=>'Page ID', 'rules'=>'trim|is_natural_no_zero|required'),
            'language_slug' => array('field'=>'language_slug','label'=>'language_slug','rules'=>'trim|required')
        )
    );

Now we create edit_view.php inside the views/admin/pages directory (which looks almost like the create_view.php, but with a few changes):

<?php defined('BASEPATH') OR exit('No direct script access allowed');?>
<div class="container" style="margin-top:60px;">
    <div class="row">
        <div class="col-lg-12">
            <h1>Edit Page in <?php echo strtolower($content_language);?></h1>
            <?php echo form_open('',array('class'=>'form-horizontal'));?>
            <div class="form-group">
                <?php
                echo form_label('Parent page','parent_id');
                echo form_dropdown('parent_id',$parent_pages,set_value('parent_id',$page->parent_id),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Title','title');
                echo form_error('title');
                echo form_input('title',set_value('title',$translation->title),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Menu title','menu_title');
                echo form_error('menu_title');
                echo form_input('menu_title',set_value('menu_title',$translation->menu_title),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Slug','slug');
                echo form_error('slug');
                echo form_input('slug',set_value('slug'),'class="form-control"');
                ?>
            </div>
            <?php
            echo '<div class="panel panel-primary">';
            echo '<div class="panel-heading">Currently active slugs</div>';
            echo '<div class="panel-body">';
            foreach($slugs as $slug)
            {
                echo $slug->url.'<br />';
            }
            echo '</div>';
            echo '</div>';
            ?>
            <div class="form-group">
                <?php
                echo form_label('Order','order');
                echo form_error('order');
                echo form_input('order',set_value('order', $page->order),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Teaser','teaser');
                echo form_error('teaser');
                echo form_textarea('teaser',set_value('teaser',$translation->teaser),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Content','content');
                echo form_error('content');
                echo form_textarea('content',set_value('content',$translation->content,false),'class="form-control"');
                ?>
            </div>

            <div class="form-group">
                <?php
                echo form_label('Page title','page_title');
                echo form_error('page_title');
                echo form_input('page_title',set_value('page_title',$translation->page_title),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Page description','page_description');
                echo form_error('page_description');
                echo form_input('page_description',set_value('page_description',$translation->page_description),'class="form-control"');
                ?>
            </div>
            <div class="form-group">
                <?php
                echo form_label('Keywords','page_keywords');
                echo form_error('page_keywords');
                echo form_input('page_keywords',set_value('page_keywords',$translation->page_keywords),'class="form-control"');
                ?>
            </div>
            <?php echo form_error('page_id');?>
            <?php echo form_hidden('page_id',set_value('page_id',$translation->page_id));?>
            <?php echo form_error('language_slug');?>
            <?php echo form_hidden('language_slug',set_value('language_slug',$translation->language_slug));?>
            <?php echo form_error('translation_id');?>
            <?php echo form_hidden('translation_id',set_value('translation_id',$translation->id));?>
            <?php
            $submit_button = 'Edit translation';
            echo form_submit('submit', $submit_button, 'class="btn btn-primary btn-lg btn-block"');?>
            <?php echo anchor('/admin/pages', 'Cancel','class="btn btn-default btn-lg btn-block"');?>
            <?php echo form_close();?>
        </div>
    </div>
</div>

Once we did that, we return to our edit() method and see what we can do after the validation was passed.

First of all we need to make sure we have a translation that needs updated. After that, we pass all POST data to variables and then do the necessary update:

            $translation_id = $this->input->post('translation_id');
            if($translation = $this->page_translation_model->get($translation_id))
            {
                $parent_id = $this->input->post('parent_id');
                $title = $this->input->post('title');
                $menu_title = $this->input->post('menu_title');
                $slug = $this->input->post('slug');
                $order = $this->input->post('order');
                $content = $this->input->post('content');
                $teaser = (strlen($this->input->post('teaser')) > 0) ? $this->input->post('teaser') : substr($content, 0, strpos($content, '<!--more-->'));
                $page_title = (strlen($this->input->post('page_title')) > 0) ? $this->input->post('page_title') : $title;
                $page_description = (strlen($this->input->post('page_description')) > 0) ? $this->input->post('page_description') : ellipsize($teaser, 160);
                $page_keywords = $this->input->post('page_keywords');
                $page_id = $this->input->post('page_id');
                $language_slug = $this->input->post('language_slug');


                $update_data = array(
                    'title' => $title,
                    'menu_title' => $menu_title,
                    'teaser' => $teaser,
                    'content' => $content,
                    'page_title' => $page_title,
                    'page_description' => $page_description,
                    'page_keywords' => $page_keywords,
                    'updated_by' => $this->user_id);

                if ($this->page_translation_model->update($update_data, $translation_id))
                {
                    $this->page_model->update(array('parent_id' => $parent_id, 'order' => $order, 'updated_by' => $this->user_id), $page_id);
                    if(strlen($slug)>0)
                    {
                        $url = $this->_verify_slug($slug, $language_slug);
                        $new_slug = array(
                            'content_type' => 'page',
                            'content_id' => $page_id,
                            'translation_id' => $translation_id,
                            'language_slug' => $language_slug,
                            'url' => $url,
                            'created_by' => $this->user_id);
                        if($slug_id =  $this->slug_model->insert($new_slug))
                        {
                            $this->slug_model->where(array('content_type'=>'page', 'translation_id'=>$translation_id,'id != '=>$slug_id))->update(array('redirect'=>$slug_id,'updated_by'=>$this->user_id));
                        }
                    }
                    $this->session->set_flashdata('message', 'The translation was updated successfully.');
                }
            }
            else
            {
                $this->session->set_flashdata('message', 'There is no translation to update.');
            }
            redirect('admin/pages','refresh');

Let’s see the whole controller again:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Pages extends Admin_Controller
{

	function __construct()
	{
		parent::__construct();
        if(!$this->ion_auth->in_group('admin'))
        {
            $this->session->set_flashdata('message','You are not allowed to visit the Pages page');
            redirect('admin','refresh');
        }
        $this->load->model('page_model');
        $this->load->model('page_translation_model');
        $this->load->model('slug_model');
        $this->load->model('language_model');
        $this->load->library('form_validation');
        $this->load->helper('text');
	}

	public function index()
	{
        $total_pages = $this->page_model->count();
        $list_pages = array();
        if($pages = $this->page_model->order_by('created_at, updated_at','desc')->with('translations')->paginate(30,$total_pages))
        {
            if(sizeof($pages)==1)
            {
                $list_pages[$pages->id] = array('created_at' => $pages->created_at, 'last_update' => $pages->updated_at, 'deleted' => $pages->deleted_at, 'translations' => array());
                foreach ($pages->translations as $translation)
                {
                    $list_pages[$pages->id]['translations'][$translation->language_slug] = array('translation_id' => $translation->id, 'title' => $translation->title, 'created_at' => $translation->created_at, 'last_update' => $translation->updated_at, 'deleted' => $translation->deleted_at);
                    if($translation->language_slug == $this->default_lang)
                    {
                        $list_pages[$pages->id]['title'] = $translation->title;
                    }
                    elseif(strlen($list_pages[$pages->id]['title'])==0)
                    {
                        $list_pages[$pages->id]['title'] = $translation->title;
                    }
                }
            }
            else
            {
                foreach ($pages as $page)
                {
                    $list_pages[$page->id] = array('created_at' => $page->created_at, 'last_update' => $page->updated_at, 'deleted' => $page->deleted_at, 'translations' => array(), 'title'=>'');
                    foreach ($page->translations as $translation)
                    {
                        $list_pages[$page->id]['translations'][$translation->language_slug] = array('translation_id' => $translation->id, 'title' => $translation->title, 'created_at' => $translation->created_at, 'last_update' => $translation->updated_at, 'deleted' => $translation->deleted_at);
                        if($translation->language_slug == $this->default_lang)
                        {
                            $list_pages[$page->id]['title'] = $translation->title;
                        }
                        elseif(strlen($list_pages[$page->id]['title'])==0)
                        {
                            $list_pages[$page->id]['title'] = $translation->title;
                        }
                    }
                }
            }
        }
        $this->data['pages'] = $list_pages;
        $this->data['next_previous_pages'] = $this->page_model->all_pages;
		$this->render('admin/pages/index_view');
	}

    public function create($language_slug = NULL, $page_id = 0)
    {
        $language_slug = (isset($language_slug) && array_key_exists($language_slug, $this->langs)) ? $language_slug : $this->current_lang;

        $this->data['content_language'] = $this->langs[$language_slug]['name'];
        $this->data['language_slug'] = $language_slug;
        $page = $this->page_model->get($page_id);
        if($page_id != 0 && $page==FALSE)
        {
            $page_id = 0;
        }
        if($this->page_translation_model->where(array('page_id'=>$page_id,'language_slug'=>$language_slug))->get())
        {
            $this->session->set_flashdata('message', 'A translation for that page already exists.');
            redirect('admin/pages', 'refresh');
        }
        $this->data['page'] = $page;
        $this->data['page_id'] = $page_id;
        $pages = $this->page_translation_model->where('language_slug',$language_slug)->order_by('menu_title')->fields('page_id,id,menu_title')->get_all();
        $this->data['parent_pages'] = array('0'=>'No parent page');
        if(!empty($pages))
        {
            foreach($pages as $page)
            {
                $this->data['parent_pages'][$page->page_id] = $page->menu_title;
            }
        }

        $rules = $this->page_model->rules;
        $this->form_validation->set_rules($rules['insert']);
        if($this->form_validation->run()===FALSE)
        {
            $this->render('admin/pages/create_view');
        }
        else
        {
            $parent_id = $this->input->post('parent_id');
            $title = $this->input->post('title');
            $menu_title = (strlen($this->input->post('menu_title')) > 0) ? $this->input->post('menu_title') : $title;
            $slug = (strlen($this->input->post('slug')) > 0) ? url_title($this->input->post('slug'),'-',TRUE) : url_title(convert_accented_characters($title),'-',TRUE);
            $order = $this->input->post('order');
            $content = $this->input->post('content');
            $teaser = (strlen($this->input->post('teaser')) > 0) ? $this->input->post('teaser') : substr($content, 0, strpos($content, '<!--more-->'));
            $page_title = (strlen($this->input->post('page_title')) > 0) ? $this->input->post('page_title') : $title;
            $page_description = (strlen($this->input->post('page_description')) > 0) ? $this->input->post('page_description') : ellipsize($teaser, 160);
            $page_keywords = $this->input->post('page_keywords');
            $page_id = $this->input->post('page_id');
            $language_slug = $this->input->post('language_slug');
            if ($page_id == 0)
            {
                $page_id = $this->page_model->insert(array('parent_id' => $parent_id, 'order' => $order, 'created_by'=>$this->user_id));
            }

            $insert_data = array('page_id'=>$page_id,'title' => $title, 'menu_title' => $menu_title, 'teaser' => $teaser,'content' => $content,'page_title' => $page_title, 'page_description' => $page_description,'page_keywords' => $page_keywords,'language_slug' => $language_slug,'created_by'=>$this->user_id);

            if($translation_id = $this->page_translation_model->insert($insert_data))
            {
                $this->page_model->update(array('parent_id'=>$parent_id, 'order'=>$order,'updated_by'=>$this->user_id),$page_id);
                $url = $this->_verify_slug($slug,$language_slug);
                $this->slug_model->insert(array(
                    'content_type'=>'page',
                    'content_id'=>$page_id,
                    'translation_id'=>$translation_id,
                    'language_slug'=>$language_slug,
                    'url'=>$url,
                    'created_by'=>$this->user_id));
            }

            redirect('admin/pages','refresh');

        }


    }

    public function edit($language_slug, $page_id)
    {
        $translation = $this->page_translation_model->where(array('page_id'=>$page_id, 'language_slug'=>$language_slug))->get();
        $this->data['content_language'] = $this->langs[$language_slug]['name'];
        if($translation == FALSE)
        {
            $this->session->set_flashdata('message', 'There is no translation for that page.');
            redirect('admin/pages', 'refresh');
        }
        $page = $this->page_model->get($page_id);
        if($page == FALSE)
        {
            $this->session->set_flashdata('message', 'There is no page to translate.');
            redirect('admin/pages', 'refresh');
        }
        $this->data['translation'] = $translation;
        $this->data['page'] = $page;
        $this->data['slugs'] = $this->slug_model->where(array('content_type'=>'page','translation_id'=>$translation->id))->get_all();
        $pages = $this->page_translation_model->where(array('language_slug'=>$language_slug,'page_id !='=>$page_id))->order_by('menu_title')->fields('page_id,id,menu_title')->get_all();
        $this->data['parent_pages'] = array('0'=>'No parent page');
        if(!empty($pages))
        {
            foreach($pages as $page)
            {
                $this->data['parent_pages'][$page->page_id] = $page->menu_title;
            }
        }

        $rules = $this->page_model->rules;
        $this->form_validation->set_rules($rules['update']);
        if($this->form_validation->run()===FALSE)
        {
            $this->render('admin/pages/edit_view');
        }
        else
        {
            $translation_id = $this->input->post('translation_id');
            if($translation = $this->page_translation_model->get($translation_id))
            {
                $parent_id = $this->input->post('parent_id');
                $title = $this->input->post('title');
                $menu_title = $this->input->post('menu_title');
                $slug = $this->input->post('slug');
                $order = $this->input->post('order');
                $content = $this->input->post('content');
                $teaser = (strlen($this->input->post('teaser')) > 0) ? $this->input->post('teaser') : substr($content, 0, strpos($content, '<!--more-->'));
                $page_title = (strlen($this->input->post('page_title')) > 0) ? $this->input->post('page_title') : $title;
                $page_description = (strlen($this->input->post('page_description')) > 0) ? $this->input->post('page_description') : ellipsize($teaser, 160);
                $page_keywords = $this->input->post('page_keywords');
                $page_id = $this->input->post('page_id');
                $language_slug = $this->input->post('language_slug');


                $update_data = array(
                    'title' => $title,
                    'menu_title' => $menu_title,
                    'teaser' => $teaser,
                    'content' => $content,
                    'page_title' => $page_title,
                    'page_description' => $page_description,
                    'page_keywords' => $page_keywords,
                    'updated_by' => $this->user_id);

                if ($this->page_translation_model->update($update_data, $translation_id))
                {
                    $this->page_model->update(array('parent_id' => $parent_id, 'order' => $order, 'updated_by' => $this->user_id), $page_id);
                    if(strlen($slug)>0)
                    {
                        $url = $this->_verify_slug($slug, $language_slug);
                        $new_slug = array(
                            'content_type' => 'page',
                            'content_id' => $page_id,
                            'translation_id' => $translation_id,
                            'language_slug' => $language_slug,
                            'url' => $url,
                            'created_by' => $this->user_id);
                        if($slug_id =  $this->slug_model->insert($new_slug))
                        {
                            $this->slug_model->where(array('content_type'=>'page', 'translation_id'=>$translation_id,'id != '=>$slug_id))->update(array('redirect'=>$slug_id,'updated_by'=>$this->user_id));
                        }
                    }
                    $this->session->set_flashdata('message', 'The translation was updated successfully.');
                }
            }
            else
            {
                $this->session->set_flashdata('message', 'There is no translation to update.');
            }
            redirect('admin/pages','refresh');
        }
    }
    private function _verify_slug($str,$language)
    {
        $this->load->model('slug_model');
        if($this->slug_model->where(array('url'=>$str,'language_slug'=>$language))->get() !== FALSE)
        {
            $parts = explode('-',$str);
            if(is_numeric($parts[sizeof($parts)-1]))
            {
                $parts[sizeof($parts)-1] = $parts[sizeof($parts)-1]++;
            }
            else
            {
                $parts[] = '1';
            }
            $str = implode('-',$parts);
            $this->_verify_slug($str,$language);
        }
        return $str;
    }
}

And that’s it… Next we will do our delete() method….

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