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          1. Add resource-specific mediasource and multifile-uploader to the gallery
          2. Add Image-Tagging to the Gallery
        2. MIGXdb.Create doodles manager with help of MIGXdb
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Add Image-Tagging to the Gallery

Created by Bruno Perner on Nov 26, 2017.
This is a user-contributed Extra. If you find issues or would like more info or help, please contact the author.

Extend the Schema

Go to Extras->MIGX

Package Name: mygallery

Tab 'XML Schema' -> Load Schema

Add this object to the existing schema:

    <object class="mygalTag" table="migx_gallery_tags" extends="xPDOSimpleObject">
        <field key="tag" dbtype="varchar" precision="100" phptype="string" null="false" default="" index="index" />
        <field key="alias" dbtype="varchar" precision="100" phptype="string" null="false" default="" index="index" />
        <composite alias="Images" class="mygalTagImage" local="id" foreign="tag" cardinality="many" owner="local" />
    </object>
    <object class="mygalTagImage" table="migx_gallery_tag_images" extends="xPDOObject">
        <field key="tag" dbtype="integer" attributes="unsigned" precision="10" phptype="int" null="false" index="pk" />
        <field key="image" dbtype="integer" attributes="unsigned" precision="10" phptype="int" null="false" index="pk" />
        <index alias="PRIMARY" name="PRIMARY" primary="true" unique="true" type="BTREE">
            <column key="tag" length="" collation="A" null="false" />
            <column key="image" length="" collation="A" null="false" />
        </index>
        <aggregate alias="Tag" class="mygalTag" local="tag" foreign="id" cardinality="one" owner="foreign" />
        <aggregate alias="Image" class="myGallery" local="image" foreign="id" cardinality="one" owner="foreign" />
    </object>

Save the Schema

Go to the Tab 'Create Tables' -> Click 'Create Tables'

Add Tagger Fields to the Formtabs

Edit the MIGX-config 'mygallery'

Go to the Tab 'Formtabs'

Add a new Tab with caption 'Tags'

Add new Field to this Tab with fieldname 'tags' and inputTVtype 'listbox-multiple'

into Input Option Values of this field put:

@EVAL return $modx->runSnippet('migxLoopCollection',array('classname'=>'mygalTag','sortConfig'=>'[{"sortby":""tag}]','tpl'=>'@CODE:[[+tag]]==[[+id]]','outputSeparator'=>'||'));

Create another field with the fieldname 'newtag'

Save the Fields and the Tab with 'Done'

Go to the Tab 'MIGXdb - Settings'

Add this to 'Hook Snippets'

{"aftersave":"mygallery_aftersave","aftergetfields":"mygallery_aftergetfields"}

Save the Config

Create two new snippets

mygallery_aftersave:

$object = &$modx->getOption('object',$scriptProperties,null);
if ($object){
    $newtags = explode(',',$object->get('newtag'));
    $tags = explode('||',$object->get('tags'));
	$object_id = $object->get('id');
    //add new tags
    foreach ($newtags as $newtag){
        if (!empty($newtag)){
            if ($tag = $modx->getObject('mygalTag',array('tag'=>$newtag))){
            } else {
                $tag = $modx->newObject('mygalTag');
                $tag->set('tag',$newtag);
                $tag->save();
                $tags[] = $tag->get('id');				
            }
        }
    }
	//get old imagetags
	$oldtags = array();
	$c = $modx->newQuery('mygalTagImage');
	$c->where(array('image'=>$object_id));
	if ($collection = $modx->getCollection('mygalTagImage',$c)){
		foreach ($collection as $tagimage){
			$oldtags[$tagimage->get('tag')] = $tagimage->get('tag');
		}
	}
	//add new imagetags
	foreach ($tags as $tag){
		if (!empty($tag)){
			unset($oldtags[$tag]);	
			if ($tagimage = $modx->getObject('mygalTagImage',array('image'=>$object_id,'tag'=>$tag))){
			} else {
				$tagimage = $modx->newObject('mygalTagImage');
				$tagimage->set('image',$object_id);
				$tagimage->set('tag',$tag);
				$tagimage->save();
			}
		}
	}
	//remove removed imagetags
	foreach ($oldtags as $tag){
	    if ($tagimage = $modx->getObject('mygalTagImage',array('image'=>$object_id,'tag'=>$tag))){
		    $tagimage->remove();	    
		}		
	}
}

mygallery_aftergetfields:

$object = &$modx->getOption('object',$scriptProperties,null);
if ($object){
    $newtags = explode(',',$object->get('newtag'));
    $tags = explode('||',$object->get('tags'));
	$object_id = $object->get('id');
    //add new tags
    foreach ($newtags as $newtag){
        if (!empty($newtag)){
            if ($tag = $modx->getObject('mygalTag',array('tag'=>$newtag))){
            } else {
                $tag = $modx->newObject('mygalTag');
                $tag->set('tag',$newtag);
                $tag->save();
                $tags[] = $tag->get('id');				
            }
        }
    }
	//get old imagetags
	$oldtags = array();
	$c = $modx->newQuery('mygalTagImage');
	$c->where(array('image'=>$object_id));
	if ($collection = $modx->getCollection('mygalTagImage',$c)){
		foreach ($collection as $tagimage){
			$oldtags[$tagimage->get('tag')] = $tagimage->get('tag');
		}
	}
	//add new imagetags
	foreach ($tags as $tag){
		if (!empty($tag)){
			unset($oldtags[$tag]);	
			if ($tagimage = $modx->getObject('mygalTagImage',array('image'=>$object_id,'tag'=>$tag))){
			} else {
				$tagimage = $modx->newObject('mygalTagImage');
				$tagimage->set('image',$object_id);
				$tagimage->set('tag',$tag);
				$tagimage->save();
			}
		}
	}
	//remove removed imagetags
	foreach ($oldtags as $tag){
	    if ($tagimage = $modx->getObject('mygalTagImage',array('image'=>$object_id,'tag'=>$tag))){
		    $tagimage->remove();	    
		}		
	}
}

Get Tags and filter by tag for the Frontend

Create a new snippet 'mygallery_prepareTagWhere' with this code:

$tag = isset($_GET['tag']) ? (int) $_GET['tag'] : 0;
$resource_id = $modx->getOption('resource_id',$scriptProperties,$modx->resource->get('id'));
$output='';
if (!empty($tag)){
    $c = $modx->newQuery('mygalTagImage');
    $c->leftjoin('myGallery','Image');
    $c->where(array('tag'=>$tag,'Image.resource_id'=>$resource_id));
    //$c->prepare();echo $c->toSql();
    if ($collection = $modx->getCollection('mygalTagImage',$c)){
        $image_ids = array();
        foreach ($collection as $object){
            $image_ids[] = $object->get('image');
        }
        $output = ',"id:IN":['.implode(',',$image_ids).']';
    }
}
return $output;

Create a chunk 'mygallery_tag_item' with this code:

<a href="[[~[[*id]]? &tag=`[[+Tag_id]]`]]">[[+Tag_tag]]</a><br>

put this snippet-tags into your template:

[[!migxLoopCollection?
  &packageName=`mygallery`
  &classname=`mygalTagImage`
  &joins=`[{"alias":"Image"},{"alias":"Tag"}]`
  &where=`{"Image.resource_id":"[[*id]]","Image.published":"1"}`
  &placeholdersKeyField=``
  &groupby=`mygalTagImage.tag`
  &sortConfig=`[{"sortby":"Tag.tag"}]`
  &tpl=`mygallery_tag_item`
]]
[[!migxLoopCollection?
  &packageName=`mygallery`
  &classname=`myGallery`
  &sortConfig=`[{"sortby":"pos"}]`
  &where=`{"resource_id":"[[*id]]","published":"1"[[!mygallery_prepareTagWhere]]}`
  &tpl=`mygallery_item`
]]

Comment Policy

Comments intended to help other users with this document are welcome! If you have a suggestion for this Extra document, please attempt to contact the author directly, possibly on GitHub or in the MODX Community Forums.

Suggest an edit to this page on GitHub (Requires GitHub account. Opens a new window/tab) or become an editor of the MODX Documentation.