feat(renderer): allow condition mapping

packages/react-form-renderer/demo/index.js

@@ -8,6 +8,22 @@ import mapper from './form-fields-mapper';
 
 const schema = {
   fields: [
+    {
+      name: 'field1',
+      label: 'Field 1',
+      component: 'text-field',
+    },
+    {
+      name: 'mapped-condition',
+      label: 'Mapped Condition',
+      component: 'text-field',
+      condition: {
+        mappedAttributes: {
+          is: ['nameFn', 'John', 'Doe'],
+        },
+        when: 'field1',
+      },
+    },
     {
       name: 'formRadio',
       label: 'SelectSubForm',
@@ -107,12 +123,26 @@ const initialValues = {
   formRadio: 'form2',
   radioBtn2: 'stu',
   txtField3: 'data',
+  field1: 'John',
 };
 
 const App = () => {
   return (
     <div style={{ padding: 20 }}>
-      <FormRenderer initialValues={initialValues} componentMapper={mapper} onSubmit={console.log} FormTemplate={FormTemplate} schema={schema} />
+      <FormRenderer
+        conditionMapper={{
+          nameFn: (name, _surname) => {
+            return (value, _conditionConfig) => {
+              return value === name;
+            };
+          },
+        }}
+        initialValues={initialValues}
+        componentMapper={mapper}
+        onSubmit={console.log}
+        FormTemplate={FormTemplate}
+        schema={schema}
+      />
     </div>
   );
 };

packages/react-form-renderer/src/condition/condition.d.ts

@@ -24,6 +24,11 @@ export interface ConditionProp {
 }
 
 export interface ConditionDefinition extends ConditionProp {
+  mappedAttributes?: {
+    is?: string;
+    when?: string;
+    set?: string;
+  },
   or?: ConditionProp | ConditionProp[];
   and?: ConditionProp | ConditionProp[];
   not?: ConditionProp | ConditionProp[];

packages/react-form-renderer/src/condition/condition.js

@@ -1,9 +1,10 @@
-import { useCallback, useEffect, useMemo, useReducer } from 'react';
+import { useCallback, useContext, useEffect, useMemo, useReducer } from 'react';
 import PropTypes from 'prop-types';
 import isEqual from 'lodash/isEqual';
 
 import useFormApi from '../use-form-api';
 import parseCondition from '../parse-condition';
+import RendererContext from '../renderer-context/renderer-context';
 
 const setterValueCheck = (setterValue) => {
   if (setterValue === null || Array.isArray(setterValue)) {
@@ -36,15 +37,18 @@ export const reducer = (state, { type, sets }) => {
 const Condition = ({ condition, children, field }) => {
   const formOptions = useFormApi();
   const formState = formOptions.getState();
-
+  const { conditionMapper } = useContext(RendererContext);
   const [state, dispatch] = useReducer(reducer, {
     sets: [],
     initial: true,
   });
 
   // It is required to get the context state values from in order to get the latest state.
   // Using the trigger values can cause issues with the radio field as each input is registered separately to state and does not yield the actual field value.
-  const conditionResult = useMemo(() => parseCondition(condition, formState.values, field), [formState.values, condition, field]);
+  const conditionResult = useMemo(
+    () => parseCondition(condition, formState.values, field, conditionMapper),
+    [formState.values, condition, field, conditionMapper]
+  );
 
   const setters = conditionResult.set ? [conditionResult.set] : conditionResult.sets;
 

packages/react-form-renderer/src/default-schema-validator/default-schema-validator.js

@@ -32,6 +32,24 @@
   }
 };
 
+const requiredOneOf = ['is', 'isEmpty', 'isNotEmpty', 'pattern', 'greaterThan', 'greaterThanOrEqualTo', 'lessThan', 'lessThanOrEqualTo'];
+
+const checkMappedAttributes = (condition) => {
+  const hasStaticAttribute = requiredOneOf.some((key) => condition.hasOwnProperty(key));
+  if (hasStaticAttribute) {
+    return true;
+  }
+
+  if (
+    condition.hasOwnProperty('mappedAttributes') &&
+    typeof condition.mappedAttributes === 'object' &&
+    !Array.isArray(condition.mappedAttributes) &&
+    condition.mappedAttributes !== null
+  ) {
+    return requiredOneOf.some((key) => condition.mappedAttributes.hasOwnProperty(key));
+  }
+};
+
 const checkCondition = (condition, fieldName, isRoot) => {
   /**
    * validate array condition
@@ -96,30 +114,22 @@
     !condition.hasOwnProperty('not') &&
     !condition.hasOwnProperty('sequence')
   ) {
-    if (!condition.hasOwnProperty('when')) {
+    const isWhenMapped = condition.hasOwnProperty('mappedAttributes') && condition.mappedAttributes?.hasOwnProperty('when');
+    if (!condition.hasOwnProperty('when') && !isWhenMapped) {
       throw new DefaultSchemaError(`
       Error occured in field definition with "name" property: "${fieldName}".
       Field condition must have "when" property! Properties received: [${Object.keys(condition)}].
     `);
     }
 
-    if (!(typeof condition.when === 'string' || typeof condition.when === 'function' || Array.isArray(condition.when))) {
+    if (!isWhenMapped && !(typeof condition.when === 'string' || typeof condition.when === 'function' || Array.isArray(condition.when))) {
       throw new DefaultSchemaError(`
       Error occured in field definition with name: "${fieldName}".
       Field condition property "when" must be of type "string", "function" or "array", ${typeof condition.when} received!].
     `);
     }
 
-    if (
-      !condition.hasOwnProperty('is') &&
-      !condition.hasOwnProperty('isEmpty') &&
-      !condition.hasOwnProperty('isNotEmpty') &&
-      !condition.hasOwnProperty('pattern') &&
-      !condition.hasOwnProperty('greaterThan') &&
-      !condition.hasOwnProperty('greaterThanOrEqualTo') &&
-      !condition.hasOwnProperty('lessThan') &&
-      !condition.hasOwnProperty('lessThanOrEqualTo')
-    ) {
+    if (!checkMappedAttributes(condition)) {
       throw new DefaultSchemaError(`
       Error occured in field definition with name: "${fieldName}".
       Field condition must have one of "is", "isEmpty", "isNotEmpty", "pattern", "greaterThan", "greaterThanOrEqualTo", "lessThan", "lessThanOrEqualTo" property! Properties received: [${Object.keys(

packages/react-form-renderer/src/form-renderer/condition-mapper.d.ts

@@ -0,0 +1,5 @@
+import { ConditionDefinition } from "../condition";
+
+export interface ConditionMapper {
+  [key: string]: (...args: any[]) => (value: any, conditionConfig: ConditionDefinition) => boolean;
+}

packages/react-form-renderer/src/form-renderer/form-renderer.d.ts

@@ -7,6 +7,7 @@ import { ActionMapper } from './action-mapper';
 import SchemaValidatorMapper from '../common-types/schema-validator-mapper';
 import { FormTemplateRenderProps } from '../common-types/form-template-render-props';
 import { NoIndex } from '../common-types/no-index';
+import { ConditionMapper } from './condition-mapper';
 
 export interface FormRendererProps<
   FormValues = Record<string, any>,
@@ -25,6 +26,7 @@ export interface FormRendererProps<
   FormTemplate?: ComponentType<FormTemplateProps> | FunctionComponent<FormTemplateProps>;
   validatorMapper?: ValidatorMapper;
   actionMapper?: ActionMapper;
+  conditionMapper?: ConditionMapper;
   schemaValidatorMapper?: SchemaValidatorMapper;
   FormTemplateProps?: Partial<FormTemplateProps>;
   children?: ReactNode | ((props: FormTemplateRenderProps) => ReactNode);

packages/react-form-renderer/src/form-renderer/form-renderer.js

@@ -45,6 +45,7 @@ const FormRenderer = ({
   clearedValue,
   clearOnUnmount,
   componentMapper,
+  conditionMapper = {},
   decorators,
   FormTemplate,
   FormTemplateProps,
@@ -148,6 +149,7 @@ const FormRenderer = ({
             componentMapper,
             validatorMapper: validatorMapperMerged,
             actionMapper,
+            conditionMapper,
             formOptions: {
               registerInputFile,
               unRegisterInputFile,
@@ -220,6 +222,9 @@ FormRenderer.propTypes = {
   initialValues: PropTypes.object,
   decorators: PropTypes.array,
   mutators: PropTypes.object,
+  conditionMapper: PropTypes.shape({
+    [PropTypes.string]: PropTypes.func,
+  }),
 };
 
 FormRenderer.defaultProps = {

packages/react-form-renderer/src/parse-condition/parse-condition.d.ts

@@ -1,7 +1,8 @@
 import { AnyObject } from "../common-types/any-object";
 import { ConditionDefinition } from "../condition";
 import Field from "../common-types/field";
+import { ConditionMapper } from "../form-renderer/condition-mapper";
 
-export type ParseCondition = (condition: ConditionDefinition, values: AnyObject, Field: Field) => void;
+export type ParseCondition = (condition: ConditionDefinition, values: AnyObject, Field: Field, conditionMapper?: ConditionMapper) => void;
 declare const parseCondition: ParseCondition
 export default parseCondition;

packages/react-form-renderer/src/parse-condition/parse-condition.js

@@ -43,7 +43,39 @@ const fieldCondition = (value, config) => {
   return config.notMatch ? !isMatched : isMatched;
 };
 
-export const parseCondition = (condition, values, field) => {
+const allowedMappedAttributes = ['when', 'is'];
+
+export const unpackMappedCondition = (condition, conditionMapper) => {
+  if (typeof condition.mappedAttributes !== 'object') {
+    return condition;
+  }
+
+  const { mappedAttributes } = condition;
+
+  const internalCondition = {
+    ...condition,
+    mappedAttributes: undefined,
+  };
+
+  Object.entries(mappedAttributes).forEach(([key, value]) => {
+    if (!allowedMappedAttributes.includes(key)) {
+      console.error(`Mapped condition attribute ${key} is not allowed! Allowed attributes are: ${allowedMappedAttributes.join(', ')}`);
+      return;
+    }
+
+    if (conditionMapper[value?.[0]]) {
+      const [fnName, ...args] = value;
+      const fn = conditionMapper[fnName];
+      internalCondition[key] = fn(...args);
+    } else {
+      console.error(`Missing conditionMapper entry for ${value}!`);
+    }
+  });
+
+  return internalCondition;
+};
+
+export const parseCondition = (condition, values, field, conditionMapper = {}) => {
   let positiveResult = {
     visible: true,
     ...condition.then,
@@ -62,14 +94,16 @@ export const parseCondition = (condition, values, field) => {
       : negativeResult;
   }
 
-  if (condition.and) {
-    return !condition.and.map((condition) => parseCondition(condition, values, field)).some(({ result }) => result === false)
+  const conditionInternal = unpackMappedCondition(condition, conditionMapper);
+
+  if (conditionInternal.and) {
+    return !conditionInternal.and.map((condition) => parseCondition(condition, values, field)).some(({ result }) => result === false)
       ? positiveResult
       : negativeResult;
   }
 
-  if (condition.sequence) {
-    return condition.sequence.reduce(
+  if (conditionInternal.sequence) {
+    return conditionInternal.sequence.reduce(
       (acc, curr) => {
         const result = parseCondition(curr, values, field);
 
@@ -83,25 +117,25 @@ export const parseCondition = (condition, values, field) => {
     );
   }
 
-  if (condition.or) {
-    return condition.or.map((condition) => parseCondition(condition, values, field)).some(({ result }) => result === true)
+  if (conditionInternal.or) {
+    return conditionInternal.or.map((condition) => parseCondition(condition, values, field)).some(({ result }) => result === true)
       ? positiveResult
       : negativeResult;
   }
 
-  if (condition.not) {
-    return !parseCondition(condition.not, values, field).result ? positiveResult : negativeResult;
+  if (conditionInternal.not) {
+    return !parseCondition(conditionInternal.not, values, field).result ? positiveResult : negativeResult;
   }
 
-  const finalWhen = typeof condition.when === 'function' ? condition.when(field) : condition.when;
+  const finalWhen = typeof conditionInternal.when === 'function' ? conditionInternal.when(field) : conditionInternal.when;
 
   if (typeof finalWhen === 'string') {
-    return fieldCondition(get(values, finalWhen), condition) ? positiveResult : negativeResult;
+    return fieldCondition(get(values, finalWhen), conditionInternal) ? positiveResult : negativeResult;
   }
 
   if (Array.isArray(finalWhen)) {
     return finalWhen
-      .map((fieldName) => fieldCondition(get(values, typeof fieldName === 'function' ? fieldName(field) : fieldName), condition))
+      .map((fieldName) => fieldCondition(get(values, typeof fieldName === 'function' ? fieldName(field) : fieldName), conditionInternal))
       .find((condition) => !!condition)
       ? positiveResult
       : negativeResult;

packages/react-form-renderer/src/renderer-context/renderer-context.d.ts

@@ -6,6 +6,7 @@ import { ActionMapper } from '../form-renderer';
 import Field from '../common-types/field';
 import { AnyObject } from '../common-types/any-object';
 import Schema from '../common-types/schema';
+import { ConditionMapper } from '../form-renderer/condition-mapper';
 
 export interface FormOptions<FormValues = Record<string, any>, InitialFormValues = Partial<FormValues>>
   extends FormApi<FormValues, InitialFormValues> {
@@ -29,6 +30,7 @@ export interface RendererContextValue {
   validatorMapper: ValidatorMapper;
   actionMapper: ActionMapper;
   formOptions: FormOptions;
+  conditionMapper: ConditionMapper;
 }
 
 declare const RendererContext: React.Context<RendererContextValue>;

packages/react-form-renderer/src/tests/form-renderer/parse-condition.test.js

@@ -684,4 +684,70 @@ describe('parseCondition', () => {
       expect(parseCondition(condition, values)).toEqual(negativeResult);
     });
   });
+
+  describe('mapped attributes', () => {
+    const conditionMapper = {
+      whenFn: () => jest.fn().mockImplementation(() => 'x'),
+      isFn: (config) => jest.fn().mockImplementation((value) => value === config),
+      setFn: () => jest.fn().mockImplementation((value) => ({ y: value === true ? 'yes' : 'no' })),
+    };
+
+    positiveResult = { visible: true, result: true };
+    negativeResult = { visible: false, result: false };
+
+    [positiveResult, negativeResult].forEach((conditionResult) => {
+      const values = {
+        x: true,
+      };
+      it(`maps attribute - when - ${conditionResult.result ? 'positive' : 'negative'}`, () => {
+        const condition = {
+          mappedAttributes: {
+            when: ['whenFn'],
+          },
+          is: conditionResult.result,
+        };
+
+        expect(parseCondition(condition, values, undefined, conditionMapper)).toEqual(conditionResult);
+      });
+
+      it(`maps attribute - is - ${conditionResult.result ? 'positive' : 'negative'}`, () => {
+        const condition = {
+          mappedAttributes: {
+            is: ['isFn', true],
+          },
+          when: 'x',
+        };
+        expect(parseCondition(condition, { x: conditionResult.result }, undefined, conditionMapper)).toEqual(conditionResult);
+      });
+    });
+
+    it('should log an error if conditionMapper is missing mapped attribute', () => {
+      const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {});
+      const conditionMapper = {};
+      const condition = {
+        mappedAttributes: {
+          when: ['whenFn'],
+        },
+        is: true,
+      };
+      expect(parseCondition(condition, { x: true }, undefined, conditionMapper)).toEqual(negativeResult);
+      expect(errorSpy).toHaveBeenCalledWith('Missing conditionMapper entry for whenFn!');
+      errorSpy.mockRestore();
+    });
+
+    it('should log an error if mapped attribute is not allowed', () => {
+      const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => {});
+      const conditionMapper = {};
+      const condition = {
+        mappedAttributes: {
+          when: ['whenFn'],
+          is: ['isFn', true],
+          not: ['notFn'],
+        },
+      };
+      expect(parseCondition(condition, { x: true }, undefined, conditionMapper)).toEqual(negativeResult);
+      expect(errorSpy).toHaveBeenCalledWith('Mapped condition attribute not is not allowed! Allowed attributes are: when, is');
+      errorSpy.mockRestore();
+    });
+  });
 });