Add a tablefield formatter that displays a Sankey diagram.

modules/d3_sankey_table_group_pp/d3_sankey_table_group_pp.module

@@ -5,6 +5,8 @@
  * Hooks and helper functions for the d3_sankey_table_group_pp module.
  */
 
+use Drupal\d3_sankey_table_group_pp\TableGroupingPreprocessor;
+
 /* Hooks. */
 
 /**
@@ -13,3 +15,50 @@
 function d3_sankey_table_group_pp_xautoload($adapter) {
   $adapter->absolute()->addPsr4('Drupal\d3_sankey_table_group_pp', 'src');
 }
+
+/**
+ * Implements hook_field_formatter_info().
+ */
+function d3_sankey_table_group_pp_field_formatter_info() {
+  $formatters = array();
+
+  // A field formatter for tablefields, which displays a Sankey diagram using
+  // the table grouping preprocessor.
+  $formatters['tablefield_d3_sankey_table_group_pp'] = array(
+    'label' => t('Sankey diagram (table grouping preprocessor)'),
+    'field types' => array('tablefield'),
+  );
+
+  return $formatters;
+}
+
+/**
+ * Implements hook_field_formatter_view().
+ */
+function d3_sankey_table_group_pp_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
+  $element = array();
+
+  // A field formatter for tablefields, which displays a Sankey diagram using
+  // the table grouping preprocessor.
+  if ($display['type'] === 'tablefield_d3_sankey_table_group_pp') {
+    foreach ($items as $delta => $item) {
+      $chart = _uw_career_common_chart_options();
+
+      // Initialize a GroupingPreprocessor, feed it the query results, get the
+      // raw data out of the preprocessor, and add it to the chart.
+      $preprocessor = new TableGroupingPreprocessor();
+      foreach ($item['tabledata'] as $row) {
+        $preprocessor->ingestRow((array) $row);
+      }
+      $raw_data = $preprocessor->getRawData();
+      $chart['nodes'] = $raw_data->getAssocArrayNodes();
+      $chart['links'] = $raw_data->getAssocArrayLinks();
+
+      // Now draw the chart.
+      $chart = d3_draw($chart);
+      $element[$delta]['#markup'] = $chart;
+    }
+  }
+
+  return $element;
+}