Initial commit

lib/assets/javascripts/builder/helpers/reset-style-per-node.js

@@ -0,0 +1,95 @@
+/*  Check and perform a reset of the styles due to a change over a node definition model (if possible).
+ *
+ *  In order to use and test this function in any view, we have removed this code
+ *  from user-actions Class.
+ *
+ *  forceStyleUpdate: it will reset the styles in any case, no matter the schema or the geometry.
+ *  resetQueryReady:  set as false ready property for query-schema-model and query-geometry-model
+ *                    in order to wait for a node change before checking if reset styles is necessary.
+ *
+ */
+
+module.exports = function (nodeDefModel, layerDefModel, forceStyleUpdate, resetQueryReady) {
+  if (!nodeDefModel) throw new Error('nodeDefModel is required');
+  if (!layerDefModel) throw new Error('layerDefModel is required');
+
+  var CHANGE_READY = 'change:ready';
+  var onQueryGeometryAndSchemaReady;
+  var styleModel = layerDefModel.styleModel;
+  var queryGeometryModel = nodeDefModel.queryGeometryModel;
+  var querySchemaModel = nodeDefModel.querySchemaModel;
+
+  onQueryGeometryAndSchemaReady = function () {
+    if (queryGeometryModel.get('ready') && querySchemaModel.get('ready')) {
+      queryGeometryModel.unbind(CHANGE_READY, onQueryGeometryAndSchemaReady);
+      querySchemaModel.unbind(CHANGE_READY, onQueryGeometryAndSchemaReady);
+    } else {
+      return; // wait until ready
+    }
+
+    var CHANGE_STATUS = 'change:status';
+    var saveDefaultStylesIfStillRelevant;
+
+    saveDefaultStylesIfStillRelevant = function () {
+      var applyStylesAndSave = function () {
+        var simpleGeometryType = queryGeometryModel.get('simple_geom');
+        if (simpleGeometryType) {
+          styleModel.setDefaultPropertiesByType('simple', simpleGeometryType);
+        } else {
+          styleModel.setDefaultPropertiesByType('none'); // fallback if there is no known geometry
+        }
+        layerDefModel.save();
+      };
+
+      var styleTypeApplied = styleModel.get('type');
+
+      if (queryGeometryModel.isDone() && querySchemaModel.isDone()) {
+        queryGeometryModel.unbind(CHANGE_STATUS, saveDefaultStylesIfStillRelevant);
+        querySchemaModel.unbind(CHANGE_STATUS, saveDefaultStylesIfStillRelevant);
+      } else {
+        return; // wait until ready
+      }
+
+      // If the geometry doesn't change and all columns used for style-def-model are still present + the styles are not custom
+      // we can reset the style form with the geometry provided
+      var haveDifferentSchema = querySchemaModel.hasDifferentSchemaThan(styleModel.getColumnsUsedForStyle());
+      if (
+        styleTypeApplied !== 'none' &&
+          !forceStyleUpdate && (
+          (!queryGeometryModel.hasChanged('simple_geom') && !haveDifferentSchema) ||
+            layerDefModel.get('cartocss_custom')
+        )
+      ) {
+        return;
+      }
+
+      if ( // Only apply changes if:
+        (
+          layerDefModel.collection.contains(layerDefModel) && // layer still exist
+          layerDefModel.get('source') === nodeDefModel.id // node is still the head of layer
+        ) || forceStyleUpdate // we force the style update
+      ) {
+        applyStylesAndSave();
+      }
+    };
+
+    saveDefaultStylesIfStillRelevant();
+
+    if (!queryGeometryModel.isFetched()) {
+      queryGeometryModel.bind(CHANGE_STATUS, saveDefaultStylesIfStillRelevant);
+    }
+
+    if (!querySchemaModel.isFetched()) {
+      querySchemaModel.bind(CHANGE_STATUS, saveDefaultStylesIfStillRelevant);
+    }
+  };
+
+  if (resetQueryReady) {
+    queryGeometryModel.set('ready', false);
+    querySchemaModel.set('ready', false);
+  }
+
+  queryGeometryModel.bind(CHANGE_READY, onQueryGeometryAndSchemaReady);
+  querySchemaModel.bind(CHANGE_READY, onQueryGeometryAndSchemaReady);
+  onQueryGeometryAndSchemaReady();
+};