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One major enhancement in Joomfish is that it is possible to add translation filters to content element files. For example look at the full version of content.xml: <?xml version="1.0" ?>
<joomfish type="contentelement">
<name>Contents</name>
<author>A. Kempkens</author>
<version>1.7</version>
<description>Definition for the core content component</description>
<reference type="content">
<table name="content">
<field type="referenceid" name="id" translate="0">ID</field>
<field type="titletext" name="title" translate="1">Title</field>
<field type="text" name="title_alias" translate="0">Title Alias</field>
<field type="htmltext" name="introtext" translate="1">Introtext</field>
<field type="htmltext" name="fulltext" translate="1">Fulltext</field>
<field type="text" name="images" translate="1">Images</field>
<field type="text" name="metakey" translate="1">Metakey</field>
<field type="text" name="metadesc" translate="1">Metadesc</field>
<field type="created_date" name="created" translate="0">Created</field>
<field type="modified_date" name="modified" translate="0">Modified</field>
<field type="checked_out_by" name="checked_out" translate="0">Check out by</field>
<field type="checked_out_date" name="checked_out_time" translate="0">Check out date</field>
<filter>c.state >= 0</filter>
</table>
</reference>
<translationfilters>
<category>catid</category>
<author>created_by</author>
<keyword>title</keyword>
<published>published</published>
</translationfilters> </joomfish> The section in red tells Joomfish to implement a category name filter where the database content table field representing the category id is catid and so on. The builtin filters (that can be used for other content types) are: | filter type | description |
|---|
| category | filter based on category name | | author | filter based on author name | | keyword | filter based on keyword value. The field in this case is the field to search for the keyword | | published | filter based on whether a translation has been published (in a given language) |
It is possible to add custom filters for 3rd party components. Consider the example of VirtueMart products. The contentelement file reads as follows: <?xml version="1.0" ?> <joomfish type="contentelement"> <name>VirtueMart Product</name> <author>EI</author> <version>1.0</version> <description>Definition for VirtueMart component (Products)</description> <reference> <table name="vm_product"> <field type="referenceid" name="product_id" translate="0">ID</field> <field type="titletext" name="product_name" translate="1">Title</field> <field type="textarea" name="product_s_desc" translate="1">Short description</field> <field type="htmltext" name="product_desc" translate="1">Description</field> <field type="created_date" name="cdate" translate="0">Created</field> <field type="modified_date" name="mdate" translate="0">Modified</field> </table> </reference> <translationfilters> <vm_category>category_id</vm_category> </translationfilters> </joomfish> You only need to add a file called translationVm_categryFilter.php into the content element folder and your translation filters are automatically implemented. As an example this file is attached. Rules:- The file and classname should start with "translation" and end with "Filter"
- The middle portion of the name should match the xml tag in the contentelement file
- 3 Methods should be implemented:
| contructor | This can generally be modelled on other examples, changing the names accordingly | | _createFilter | This is a portion of an SQL query that finds translations. The return value will be a WHERE clause in this query (you should not add the WHERE part of this query) | | createfilterHTML | This created the HTML part of the filter, it can be a textbox, select list etc. Use the builtin examples and the VirtueMart attachment for more guidance. |
Enjoy !! Geraint Edwards 27 March 2006
<?php
class translationVm_categoryFilter extends translationFilter
{
function translationVm_categoryFilter ($contentElement){
$this->filterNullValue=-1;
$this->filterType="vm_category";
$this->filterField = $contentElement->getFilter("vm_category");
parent::translationFilter($contentElement);
}
function _createFilter(){
global $database;
if (!$this->filterField ) return "";
$filter="";
if ($this->filter_value!=$this->filterNullValue){
// get list of product_id in the appropriate category
$sql = "SELECT xref.product_id FROM #__vm_product_category_xref as xref"
." WHERE xref.category_id=$this->filter_value";
$database->setQuery($sql);
$prodids = $database->loadObjectList();
$idstring = "";
foreach ($prodids as $pid){
if (strlen($idstring)>0) $idstring.=",";
$idstring.=$pid->product_id;
}
$filter = "c.product_id IN($idstring)";
}
return $filter;
}
/**
* Creates vm_category filter
*
* @param unknown_type $filtertype
* @param unknown_type $contentElement
* @return unknown
*/
function _createfilterHTML(){
global $database; if (!$this->filterField) return "";
$categoryOptions=array();
$categoryOptions[] = mosHTML::makeOption( '-1',_JOOMFISH_ADMIN_CATEGORY_ALL ); $sql = "SELECT DISTINCT cat.category_id, cat.category_name FROM #__vm_category as cat,"
." #__".$this->tableName." as c, #__vm_product_category_xref as xref"
." WHERE c.product_id=xref.product_id AND xref.".$this->filterField."=cat.category_id ORDER BY cat.category_name";
$database->setQuery($sql);
$cats = $database->loadObjectList();
$catcount=0;
foreach($cats as $cat){
$categoryOptions[] = mosHTML::makeOption( $cat->category_id,$cat->category_name);
$catcount++;
}
$categoryList=array();
$categoryList["title"]=_JOOMFISH_ADMIN_CATEGORY;
$categoryList["html"] = mosHTML::selectList( $categoryOptions, 'vm_category_filter_value', 'class="inputbox" size="1" onchange="document.adminForm.submit();"', 'value', 'text', $this->filter_value ); return $categoryList; } } ?>
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