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get_resource_field_data_batch()

Description

get_resource_field_data_batch - Get all resource data for the given resources

Returns a multidimensional array with resource IDs as top level keys, then fields (order determined by $ord_by setting)
IMPORTANT: This differs from get_resource_field_data() in that only fields containing data will be returned.

e.g.
Array
(
[119912] => array
(
[0] => Array
(
[resource] => 119912
[value] => This is the title of resource 119912
[resource_type_field] => 8
[ref] => 8
[name] => title
[title] => Title
[field_constraint] => 0
[type] => 1))
....


"csvexport" (bool) - get data for CSV export (uses \ separator for category tree nodes)
"personal" (bool) - include data in fields marked as personal
"alldata" (bool) - include data in all fields, including technical metadata

Parameters

ColumnTypeDefaultDescription
$resources array (either an array of resource ids or an array returned from search results)
$use_permissions bool true Honour user permissions e.g. field access. TRUE by default
$external_access bool false Only get data permitted to view externally. FALSE by default
$ord_by bool false Use field order_by setting. FALSE by default (order is by resource type first)
$exportoptions mixed array Array of options as below

Return

array Array of resource data organised by resource then metadata field ID

Location

include/resource_functions.php lines 3583 to 3829

Definition

 
function get_resource_field_data_batch($resources,$use_permissions=true,$external_access=false,$ord_by=false, $exportoptions = array())
    {
    # Returns field data and field properties (resource_type_field and resource_data tables)
    # for all the resource references in the array $refs.
    # This will use a single SQL query and is therefore a much more efficient way of gathering
    # resource data for a list of resources (e.g. search result display for a page of resources).
    if (count($resources)==0) {return array();} # return an empty array if no resources specified (for empty result sets)

    global $view_title_field, $NODE_FIELDS;

    $restype = $allresdata = [];
    $csvexport = isset($exportoptions["csvexport"]) ? $exportoptions["csvexport"] : false;
    $personal = isset($exportoptions["personal"]) ? $exportoptions["personal"] : false;
    $alldata = isset($exportoptions["alldata"]) ? $exportoptions["alldata"] : false;
    $nontree_field_types = array_diff($NODE_FIELDS,array(FIELD_TYPE_CATEGORY_TREE));

    // Get field_info
    $tree_fields = get_resource_type_fields("","ref","asc",'',array(FIELD_TYPE_CATEGORY_TREE));
    $field_restypes = get_resource_type_field_resource_types();
    $fields_info = ps_query(
        "SELECT f.ref resource_type_field,
                f.ref AS fref,
                f.required AS frequired, " .
                columns_in("resource_type_field", "f") . 
        " FROM resource_type_field f
        WHERE (f.active=1 AND f.type IN (" . ps_param_insert(count($nontree_field_types)) . "))
        ORDER BY f.order_by, f.ref",
        ps_param_fill($nontree_field_types, 'i')
    );

    # Build arrays of resources
    $resource_chunks = array_chunk($resources,SYSTEM_DATABASE_IDS_CHUNK_SIZE);
    foreach($resource_chunks as $resource_chunk)
        {
        if(isset($resource_chunk[0]["resource_type"]))
            {
            // This is an array of search results so we already have the resource types
            $restype = array_column($resource_chunk,"resource_type","ref");
            $resourceids = array_filter(array_column($resource_chunk,"ref"), 'is_int_loose');
            $getresources = $resource_chunk;
            }
        else
            {
            $resource_chunk = array_filter($resource_chunk, 'is_int_loose');
            if ($resource_chunk === [])
                {
                break;
                }
            $resourceids = $resource_chunk;
            $allresourcedata = ps_query("SELECT ref, resource_type FROM resource WHERE ref IN (" . ps_param_insert(count($resource_chunk)) . ")", ps_param_fill($resource_chunk,"i"));
            foreach($allresourcedata as $resourcedata)
                {
                $restype[$resourcedata["ref"]] = $resourcedata["resource_type"];
                }
            $getresources = array();
            foreach($resource_chunk as $resource)
                {
                $getresources[]["ref"] = $resource;
                }
            }
    
        # Fields array is no longer built from direct SQL using group concat
        $fields=array();

        # Fetch field values at node level for all resources in chunk ensuring that multiple node values are ordered correctly
        $field_value_sql = 
        "SELECT rn.resource, n.resource_type_field `field`, rn.node, n.name 
            FROM resource_node rn
        INNER JOIN node n on n.ref = rn.node and rn.resource IN (" . ps_param_insert(count($resourceids)) . ")
        ORDER BY rn.resource, n.resource_type_field, n.order_by";

        $field_values_allresources = ps_query($field_value_sql,ps_param_fill($resourceids,"i"));

        # Append an ending sentinal
        $field_values_allresources[]=array('resource'=>null,'field'=>null,'node'=>null,'name'=>null); 

        $field_node_list=array();
        $field_ref_list=array();
        $last_resource=null;
        $last_field=null;

        # Assemble comma separated lists of node names and refs to attach to the fields array
        foreach($field_values_allresources as $field_value) {
            $this_resource=$field_value['resource'];
            if($this_resource===null && $last_resource===null) { break; } # Sentinal reached, nothing to assemble
            $this_field=$field_value['field'];
            if($this_resource===$last_resource) {
                # Same resource
                if($this_field===$last_field) {
                    # Same field so append
                    $field_node_list[$this_field]['values'] .= (", " . $field_value['name']);
                    $field_ref_list[$this_field]['refs'] .= ("," . $field_value['node']);
                }
                else {
                    # New field so replace
                    $field_node_list[$this_field]['values'] = $field_value['name'];
                    $field_ref_list[$this_field]['refs'] = $field_value['node'];
                    $last_field=$this_field;
                }
            }
            else {
                # Change of resource
                if(!is_null($last_resource)) {
                    # Process the data just assembled for the last resource

                    # Build an array of fields for this resource using the fields_info array
                    foreach (array_keys($fields_info) as $fikey) {
                        $this_base_field=$fields_info[$fikey]['resource_type_field'];
                        # Add base field info for this field
                        $data_for_this_field=$fields_info[$fikey];
                        # Now enrich the data for this field for this resource
                        $data_for_this_field['resource'] = $last_resource;
                        if(isset($field_node_list[$this_base_field])) {
                            $data_for_this_field['value'] = $field_node_list[$this_base_field]['values'];
                            $data_for_this_field['nodes'] = $field_ref_list[$this_base_field]['refs'];
                            # The data for this resource field is ready so attach it to the final result array for this chunk
                            $fields[]=$data_for_this_field;
                        }
                        else {
                            # Empty fields are not attached
                            $data_for_this_field['value'] = null;
                            $data_for_this_field['nodes'] = null;
                        }
                    }

                    # Clear node list and ref list for new resource
                    $field_node_list=array();
                    $field_ref_list=array();
                    $last_field=null;
                    if($this_resource===null) { 
                        break; 
                    } # Sentinal reached, assembly is complete
                }
                # Attach 
                if($this_field===$last_field) {
                    # Same field so append
                    $field_node_list[$this_field]['values'] .= (", " . $field_value['name']);
                    $field_ref_list[$this_field]['refs'] .= ("," . $field_value['node']);
                }
                else {
                    # New field so replace
                    $field_node_list[$this_field]['values'] = $field_value['name'];
                    $field_ref_list[$this_field]['refs'] = $field_value['node'];
                    $last_field=$this_field;
                }
                $last_resource=$this_resource;
            }

        } # End of allresources for this chunk

        foreach($tree_fields as $tree_field)
            {
            // Establish the tree strings for all nodes belonging to the tree field
            $addfield = $tree_field;
            // Now for each resource, build an array consisting of all of the paths for the selected nodes
            foreach($getresources as $getresource)
                {
                $treenodes = get_cattree_nodes_ordered($tree_field["ref"], $getresource["ref"], false); # True means get all nodes; False means get selected nodes
                $treenodenames = get_cattree_node_strings($treenodes, true); # True means names are paths to nodes; False means names are node names

                $valstring = $csvexport ? ("\"" . implode("\",\"",$treenodenames) . "\"") : implode(",",$treenodenames);

                $addfield["resource"] = $getresource["ref"];
                $addfield["value"] = count($treenodenames) > 0 ? $valstring : "";
                $addfield["resource_type_field"] = $tree_field["ref"];
                $addfield["fref"] = $tree_field["ref"];
                $fields[] = $addfield;
                }
            }

        // Prepare the all resource data array if there is data
        if (empty($fields))
            {
            return array();
            }

        // Convert to array with resource ID as index
        for ($n=0;$n<count($fields);$n++)
            {
            $rowadded = false;
            if (!isset($allresdata[$fields[$n]["resource"]]))
                {
                $allresdata[$fields[$n]["resource"]]=[];
                }

            // Skip fields which are not applicable
            if($fields[$n]["global"] != 1 && (!isset($field_restypes[$fields[$n]["ref"]]) || !in_array($restype[$fields[$n]["resource"]],$field_restypes[$fields[$n]["ref"]])))
                {
                // This resource's resource_type is not associated with this field
                continue;
                }

            // Add data to array
            if  (
                    (!$use_permissions
                    ||
                    ($fields[$n]["resource"]<0 && checkperm("P" . $fields[$n]["fref"])) // Upload only edit access to this field
                    ||                
                    metadata_field_view_access($fields[$n]["fref"])
                    )
                &&
                    (!($external_access && !$fields[$n]["external_user_access"]))
                &&
                    (!$personal || $fields[$n]["personal_data"])
                &&
                    ($alldata || $fields[$n]["include_in_csv_export"])
                )
                {
                $fields[$n]["title"] = lang_or_i18n_get_translated($fields[$n]["title"], "fieldtitle-");
                $allresdata[$fields[$n]["resource"]][$fields[$n]["ref"]] = $fields[$n];
                $rowadded = true;
                }

            # Add title field
            if  (!$rowadded &&
                    $fields[$n]['ref'] == $view_title_field  #Check field against $title_field for default title reference
                    &&
                    metadata_field_view_access($fields[$n]["fref"]) #Check permissions to access title field
                    )
                {
                $allresdata[$fields[$n]["resource"]][$fields[$n]["ref"]] = $fields[$n];
                }
            }
        }
    $fields = array();
    foreach($allresdata as $resourceid => $resdata)
        {
        $fieldorder_by = array();
        $fieldglobal = array();
        $fieldref = array();
        foreach($resdata as $fkey => $field)
            {
            $fieldorder_by[$fkey]   = $field["order_by"];
            $fieldglobal[$fkey]     = $field["global"] == 1 ? 0 : 1;
            $fieldref[$fkey]        = $field["ref"];
            }
        if($ord_by)
            {
            array_multisort($fieldorder_by, SORT_ASC, $fieldglobal, SORT_ASC, $fieldref, SORT_ASC, $allresdata[$resourceid]);
            }
        else
            {
            array_multisort($fieldglobal, SORT_ASC, $fieldorder_by, SORT_ASC, $fieldref, SORT_ASC, $allresdata[$resourceid]);
            }
        }
    return $allresdata;
    }

This article was last updated 4th December 2024 09:05 Europe/London time based on the source file dated 28th November 2024 12:10 Europe/London time.