Prevent deleting mandatory attributes

entity/AttributeRelation_entity/AttributeRelation_entity.aod

@@ -98,6 +98,7 @@
       <title>Attribute</title>
       <consumer>SpecificAttribute</consumer>
       <mandatory v="false" />
+      <stateProcess>%aditoprj%/entity/AttributeRelation_entity/entityfields/ab_attribute_id/stateProcess.js</stateProcess>
       <valueProcess>%aditoprj%/entity/AttributeRelation_entity/entityfields/ab_attribute_id/valueProcess.js</valueProcess>
       <displayValueProcess>%aditoprj%/entity/AttributeRelation_entity/entityfields/ab_attribute_id/displayValueProcess.js</displayValueProcess>
       <onValueChange>%aditoprj%/entity/AttributeRelation_entity/entityfields/ab_attribute_id/onValueChange.js</onValueChange>
@@ -261,6 +262,10 @@
       <valueProcess>%aditoprj%/entity/AttributeRelation_entity/entityfields/showdsgvomessage_param/valueProcess.js</valueProcess>
       <expose v="true" />
     </entityParameter>
+    <entityField>
+      <name>PROTECTED</name>
+      <state>READONLY</state>
+    </entityField>
   </entityFields>
   <recordContainers>
     <jDitoRecordContainer>
@@ -289,6 +294,9 @@
         <jDitoRecordFieldMapping>
           <name>AB_ATTRIBUTE_ID.displayValue</name>
         </jDitoRecordFieldMapping>
+        <jDitoRecordFieldMapping>
+          <name>PROTECTED.value</name>
+        </jDitoRecordFieldMapping>
       </recordFieldMappings>
     </jDitoRecordContainer>
   </recordContainers>

entity/AttributeRelation_entity/entityfields/ab_attribute_id/stateProcess.js

+import("system.neon");
+import("system.vars");
+import("system.result");
+
+if (vars.get("$sys.recordstate") == neon.OPERATINGSTATE_EDIT)
+    result.string(vars.exists("$param.GetTree_param") && vars.getString("$param.GetTree_param") == "true"
+        ? neon.COMPONENTSTATE_READONLY 
+        : neon.COMPONENTSTATE_EDITABLE
+    );
\ No newline at end of file

entity/AttributeRelation_entity/grantDeleteProcess.js

-import("Attribute_lib");
 import("system.result");
 import("system.vars");
 
-var objectType = vars.exists("$param.ObjectType_param") && vars.get("$param.ObjectType_param");
-var rowId = vars.exists("$param.ObjectRowId_param") && vars.get("$param.ObjectRowId_param");
-if (vars.get("$param.GetTree_param") == "true" && rowId)
-    result.object(AttributeRelationUtils.countAttributeRelations(rowId, objectType) != 0);
\ No newline at end of file
+result.object(vars.get("$field.PROTECTED") != "true");
\ No newline at end of file

entity/AttributeRelation_entity/recordcontainers/jdito/contentProcess.js

@@ -22,6 +22,8 @@ var sqlCondition = new SqlCondition(); //where-condition (condition for the Attr
 var joinCondition = new SqlCondition(); //condition for the joined values (for AttributeRelation)
 //=> these are two distinct conditions because if showEmpty is true, a left join is used for the relations
 
+var possibleAttributes = AttributeUtil.getPossibleAttributes(objectType);
+
 if (vars.exists("$local.idvalues") && vars.get("$local.idvalues"))
 {
     let idVals = vars.get("$local.idvalues");
@@ -45,7 +47,6 @@ else if (showEmpty || rowId)
     {
         let filtered = vars.exists("$param.FilteredAttributeIds_param") && vars.getString("$param.FilteredAttributeIds_param");
         
-        let possibleAttributes = AttributeUtil.getPossibleAttributes(objectType);
         sqlCondition.andIn("AB_ATTRIBUTE.AB_ATTRIBUTEID", possibleAttributes);
     }
     if (vars.exists("$param.FilteredAttributeIds_param") && vars.getString("$param.FilteredAttributeIds_param"))
@@ -98,6 +99,23 @@ else
 
 attributeSql.leftJoin("AB_ATTRIBUTE", "COMBOVAL.AB_ATTRIBUTEID = " + $AttributeTypes.COMBO.databaseField, "COMBOVAL");
 
+var countCheck = {};
+if (getTree)
+{
+    let minUsages = db.table(SqlCondition.begin()
+        .andIn("AB_ATTRIBUTEUSAGE.AB_ATTRIBUTE_ID", possibleAttributes)
+        .andPrepare("AB_ATTRIBUTEUSAGE.OBJECT_TYPE", objectType)
+        .buildSql("select AB_ATTRIBUTE_ID, MIN_COUNT from AB_ATTRIBUTEUSAGE", "1=2")
+    );
+    minUsages.forEach(function (usage)
+    {
+        this[usage[0]] = {
+            count : 0,
+            min : usage[1]
+        };
+    }, countCheck);
+}
+
 var attributeValues = db.table(attributeSql.build()).map(function (row) 
 {
     var attributeId = row[1];
@@ -115,11 +133,20 @@ var attributeValues = db.table(attributeSql.build()).map(function (row)
     else 
         viewValue = AttributeTypeUtil.getAttributeViewValue(type, value, row[5]);
     
+    if (attributeId in countCheck)
+        countCheck[attributeId].count++;
+    
     //TODO: what should be the uid if showEmpty is true?
     //                 V-- set "," to mark this as new generated UUID
-    return [row[0] || util.getNewUUID() + "," + attributeId, row[2], value, viewValue, attributeId, attributeName];
+    return [row[0] || util.getNewUUID() + "," + attributeId, row[2], value, viewValue, attributeId, attributeName, ""];
 });
 
+for (let i = 0; i < attributeValues.length; i++)
+{
+    let attrId = attributeValues[i][4];
+    if (attrId in countCheck && countCheck[attrId].min >= countCheck[attrId].count)
+        attributeValues[i][6] = "true";
+}
 
 var parentAttributes = [];
 var attributeObj = {}; //object of attribute ids to avoid duplicates
@@ -151,7 +178,7 @@ function _fetchAttributes (pAttributeIds)
                 else
                     row[1] = null;
                 row[2] = translate.text(row[2]); //translate attribute name
-                parentAttributes.push([row[0], row[1], "", "", "", row[2]]);
+                parentAttributes.push([row[0], row[1], "", "", "", row[2], "true"]);
             }, attributeObj);
             
     if (nextIds.length)