Allow non-editable fields to be auto-derived

app/src/api/config/dataFields.ts

@@ -3,10 +3,19 @@ import { valueType } from '../../helpers';
 /** Configuration for a single data field */
 export interface DataFieldConfig {
     /**
-     * Allow editing the field?
+     * Allow editing the field through the API?
      */
     edit: boolean;
 
+    /**
+     * Should the editing of the field be allowed - but only when
+     * the change is a result of an edit of another field, from which this field is derived.
+     * Example: editing Land Use Group modifies Land Use Order, too, because LU Order is automatically derived from LU Group.
+     * But Land Use Order itself cannot be modified directly by users.
+     * Default: false
+     */
+    derivedEdit?: boolean;
+
     /**
      * Allow verifying the field value?
      * Default: false;
@@ -236,6 +245,7 @@ export const dataFieldsConfig = valueType<DataFieldConfig>()({ /* eslint-disable
     },
     current_landuse_order: {
         edit: false,
+        derivedEdit: true,
         verify: false,
     },
 

app/src/api/dataAccess/building.ts

@@ -55,7 +55,7 @@ export async function insertEditHistoryRevision(
 
 const columnConfigLookup = Object.assign(
     {}, 
-    ...Object.entries(dataFieldsConfig).filter(([, config]) => config.edit).map(([key, {
+    ...Object.entries(dataFieldsConfig).filter(([, config]) => config.edit || config.derivedEdit).map(([key, {
         asJson = false,
         sqlCast
     }]) => ({ [key]: {

app/src/api/errors/general.ts

@@ -21,6 +21,15 @@ export class InvalidOperationError extends UserError {
     }
 }
 
+export class InvalidFieldError extends UserError {
+    public fieldName: string;
+    constructor(message?: string, fieldName?: string) {
+        super(message);
+        this.name = 'InvalidFieldError';
+        this.fieldName = fieldName;
+    }
+}
+
 export class FieldTypeError extends UserError {
     public fieldName: string;
     constructor(message?: string, fieldName?: string) {

app/src/api/services/building/base.ts

@@ -31,7 +31,11 @@ export async function getBuildingById(id: number) {
     }
 }
 
-const FIELD_EDIT_WHITELIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.edit).map(([key]) => key));
+/**
+ * List of fields for which modification is allowed
+ * (directly by the user, or for fields that are derived from others)
+ */
+const FINAL_FIELD_EDIT_ALLOWLIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.edit || value.derivedEdit).map(([key]) => key));
 
 export async function editBuilding(buildingId: number, building: any, userId: string): Promise<object> { // TODO add proper building type
     return await updateBuildingData(buildingId, userId, async () => {
@@ -44,7 +48,7 @@ export async function editBuilding(buildingId: number, building: any, userId: st
         delete processedBuilding.geometry_id;
 
         // return whitelisted fields to update
-        return pickFields(processedBuilding, FIELD_EDIT_WHITELIST);
+        return pickFields(processedBuilding, FINAL_FIELD_EDIT_ALLOWLIST);
     });
 }
 

app/src/api/services/domainLogic/validateBuildingUpdate.ts

@@ -2,16 +2,23 @@ import Ajv from 'ajv';
 import addFormats from 'ajv-formats';
 
 import { mapObject } from '../../../helpers';
-import { FieldTypeError } from '../../errors/general';
+import { InvalidFieldError, FieldTypeError } from '../../errors/general';
+import { dataFieldsConfig } from '../../config/dataFields';
 import { fieldSchemaConfig } from '../../config/fieldSchemaConfig';
 
 const ajv = new Ajv();
 addFormats(ajv);
 
 const compiledSchemas = mapObject(fieldSchemaConfig, ([, val]) => ajv.compile(val))
 
+const EXTERNAL_FIELD_EDIT_ALLOWLIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.edit).map(([key]) => key));
+
 export function validateBuildingUpdate(buildingId: number, building: any) {
     for(const field of Object.keys(building)) {
+        if(!EXTERNAL_FIELD_EDIT_ALLOWLIST.has(field)) {
+            throw new InvalidFieldError('Field is not editable', field);
+        }
+
         if(field in compiledSchemas) {
             if(!compiledSchemas[field](building[field])) {
                 throw new FieldTypeError('Invalid format of data sent', field);