Validators for filters (#3976)

* Fix state triggering for filters

* Validation for filters

* Update types

* Change isFilterElement

* Change isFilterElement

src/components/ConditionalFilter/API/ProductFilterAPIProvider.tsx

@@ -105,7 +105,7 @@ const createAPIHandler = (
     return new ChannelHandler(client, inputValue);
   }
 
-  throw new Error("Unknown filter element");
+  throw new Error(`Unknown filter element: "${rowType}"`);
 };
 
 export const useProductFilterAPIProvider = (): FilterAPIProvider => {

src/components/ConditionalFilter/ConditionalFilters.tsx

@@ -1,19 +1,28 @@
 import { Box } from "@saleor/macaw-ui/next";
-import React, { FC } from "react";
+import React, { FC, useState } from "react";
 
 import { useConditionalFilterContext } from "./context";
 import { FilterContainer } from "./FilterElement";
 import { FiltersArea } from "./FiltersArea";
 import { LoadingFiltersArea } from "./LoadingFiltersArea";
+import { ErrorEntry, Validator } from "./Validation";
 
 export const ConditionalFilters: FC<{ onClose: () => void }> = ({
   onClose,
 }) => {
   const { valueProvider, containerState } = useConditionalFilterContext();
+  const [errors, setErrors] = useState<ErrorEntry[]>([])
 
   const handleConfirm = (value: FilterContainer) => {
-    valueProvider.persist(value);
+    const validator = new Validator(value)
-    onClose();
+
+    if (validator.isValid()) {
+      valueProvider.persist(value);
+      onClose();
+      return
+    }
+
+    setErrors(validator.getErrors())
   };
 
   const handleCancel = () => {
@@ -31,7 +40,7 @@ export const ConditionalFilters: FC<{ onClose: () => void }> = ({
       borderBottomLeftRadius={2}
       borderBottomRightRadius={2}
     >
-      <FiltersArea onConfirm={handleConfirm} onCancel={handleCancel} />
+      <FiltersArea onConfirm={handleConfirm} errors={errors} onCancel={handleCancel} />
     </Box>
   );
 };

src/components/ConditionalFilter/FilterElement/Condition.ts

@@ -25,6 +25,10 @@ export class Condition {
     return this.loading;
   }
 
+  public isEmpty() {
+    return this.options.isEmpty() || this.selected.isEmpty()
+  }
+
   public static createEmpty() {
     return new Condition(
       ConditionOptions.empty(),

src/components/ConditionalFilter/FilterElement/ConditionOptions.ts

@@ -74,6 +74,10 @@ export class ConditionOptions extends Array<ConditionItem> {
     return new ConditionOptions([]);
   }
 
+  public isEmpty() {
+    return this.length === 0
+  }
+
   public findByLabel(label: string) {
     return this.find(f => f.label === label);
   }

src/components/ConditionalFilter/FilterElement/ConditionSelected.ts

@@ -10,6 +10,10 @@ export class ConditionSelected {
     public loading: boolean,
   ) {}
 
+  public isEmpty() {
+    return this.value === ""
+  }
+
   public static empty() {
     return new ConditionSelected("", null, [], false);
   }

src/components/ConditionalFilter/FilterElement/FilterElement.ts

@@ -14,9 +14,13 @@ class ExpressionValue {
     public value: string,
     public label: string,
     public type: string,
-  ) {}
+  ) { }
 
-  public static fromSlug (slug: string) {
+  public isEmpty() {
+    return this.value.length === 0 || this.label.length === 0
+  }
+
+  public static fromSlug(slug: string) {
     const option = STATIC_OPTIONS.find(o => o.slug === slug)
 
     if (!option) return ExpressionValue.emptyStatic()
@@ -122,7 +126,7 @@ export class FilterElement {
   }
 
   public isEmpty() {
-    return this.value.type === "e";
+    return this.value.isEmpty() || this.condition.isEmpty()
   }
 
   public isStatic() {
@@ -145,11 +149,11 @@ export class FilterElement {
     return null;
   }
 
-  public setConstraint (constraint: Constraint) {
+  public setConstraint(constraint: Constraint) {
     this.constraint = constraint
   }
 
-  public clearConstraint () {
+  public clearConstraint() {
     this.constraint = undefined
   }
 
@@ -163,7 +167,10 @@ export class FilterElement {
   }
 
   public static isCompatible(element: unknown): element is FilterElement {
-    return typeof element !== "string" && !Array.isArray(element)
+    return typeof element === "object" &&
+      !Array.isArray(element) &&
+      element !== null &&
+      'value' in element
   }
 
   public static fromValueEntry(valueEntry: any) {
@@ -178,7 +185,7 @@ export class FilterElement {
     );
   }
 
-  public static createStaticBySlug (slug: StaticElementName) {
+  public static createStaticBySlug(slug: StaticElementName) {
     return new FilterElement(
       ExpressionValue.fromSlug(slug),
       Condition.emptyFromSlug(slug),
@@ -206,4 +213,10 @@ export class FilterElement {
   }
 }
 
+export const hasEmptyRows = (container: FilterContainer) => {
+  return container
+    .filter(FilterElement.isCompatible)
+    .some((e: FilterElement) => e.isEmpty())
+}
+
 export type FilterContainer = Array<string | FilterElement | FilterContainer>;

src/components/ConditionalFilter/FiltersArea.tsx

@@ -5,17 +5,20 @@ import { useConditionalFilterContext } from "./context";
 import { FilterContainer } from "./FilterElement";
 import { LeftOperand } from "./LeftOperandsProvider";
 import { useFilterContainer } from "./useFilterContainer";
+import { ErrorEntry } from "./Validation";
 
 interface FiltersAreaProps {
   onConfirm: (value: FilterContainer) => void;
+  errors?: ErrorEntry[]
   onCancel?: () => void;
 }
 
-export const FiltersArea: FC<FiltersAreaProps> = ({ onConfirm, onCancel }) => {
+export const FiltersArea: FC<FiltersAreaProps> = ({ onConfirm, onCancel, errors }) => {
   const { apiProvider, leftOperandsProvider } = useConditionalFilterContext();
 
   const {
     value,
+    hasEmptyRows,
     addEmpty,
     removeAt,
     updateLeftOperator,
@@ -67,6 +70,7 @@ export const FiltersArea: FC<FiltersAreaProps> = ({ onConfirm, onCancel }) => {
       // @ts-expect-error
       value={value}
       onChange={handleStateChange}
+      error={errors}
     >
       <_ExperimentalFilters.Footer>
         <_ExperimentalFilters.AddRowButton>
@@ -76,7 +80,7 @@ export const FiltersArea: FC<FiltersAreaProps> = ({ onConfirm, onCancel }) => {
           <_ExperimentalFilters.ClearButton onClick={onCancel}>
             Clear
           </_ExperimentalFilters.ClearButton>
-          <_ExperimentalFilters.ConfirmButton onClick={() => onConfirm(value)}>
+          <_ExperimentalFilters.ConfirmButton onClick={() => onConfirm(value)} disabled={hasEmptyRows}>
             Save
           </_ExperimentalFilters.ConfirmButton>
         </Box>

src/components/ConditionalFilter/Validation/index.ts

@@ -0,0 +1,58 @@
+import { FilterContainer } from "../FilterElement";
+import { FilterElement } from "../FilterElement/FilterElement";
+import { numeric } from "./numeric";
+
+const VALIDATORS = {
+  NUMERIC: numeric,
+  price: numeric
+} as Record<string, ValidateFn>
+
+
+const toValidated = (element: string | FilterElement | FilterContainer, index: number): RawValidateEntry => {
+  if (!FilterElement.isCompatible(element)) return false
+
+  const key = element.isAttribute() ?
+    element.value.type :
+    element.value.value
+
+  const validateFn = VALIDATORS[key as keyof typeof VALIDATORS]
+
+  if (validateFn) {
+    return validateFn(element, index)
+  }
+
+  return false
+}
+
+const hasErrors = (element: RawValidateEntry): element is ErrorEntry  => {
+  return element !== false
+}
+
+export interface ErrorEntry {
+  row: number
+  leftText?: string;
+  conditionText?: string;
+  rightText?: string;
+}
+
+type RawValidateEntry = false | ErrorEntry
+type ValidateFn = (element: FilterElement, row: number) =>  RawValidateEntry
+
+
+export class Validator {
+  constructor(
+    public container: FilterContainer
+  ) { }
+
+  public isValid() {
+    return !this.validate().some(hasErrors)
+  }
+
+  public getErrors() {
+    return this.validate().filter(hasErrors)
+  }
+
+  private validate() {
+    return this.container.map(toValidated)
+  }
+}

src/components/ConditionalFilter/Validation/numeric.ts

@@ -0,0 +1,41 @@
+import { FilterElement } from "../FilterElement"
+
+const isTooLong = (value: string, row: number) => {
+  if (value.length > 25) {
+    return {
+      row,
+      rightText: "The value is too long."
+    }
+  }
+
+  return false
+}
+
+export const numeric = (element: FilterElement, row: number) => {
+  const { value } = element.condition.selected
+
+  if (Array.isArray(value) && value.length === 2) {
+    const [sLte, sGte] = value as [string, string]
+    const errorsLte = isTooLong(sLte, row)
+    const errorsGte = isTooLong(sLte, row)
+
+    if (errorsLte) return errorsGte
+    if (errorsGte) return errorsGte
+
+    const lte = parseFloat(sLte)
+    const gte = parseFloat(sGte)
+
+    if (lte > gte) {
+      return {
+        row,
+        rightText: "The value must be higher"
+      }
+    }
+  }
+
+  if (typeof value === "string") {
+    return isTooLong(value, row)
+  }
+
+  return false
+}

src/components/ConditionalFilter/useContainerState.ts

@@ -6,12 +6,9 @@ import { FilterValueProvider } from "./FilterValueProvider";
 type StateCallback = (el: FilterElement) => void;
 type Element = FilterContainer[number];
 
-const isFilterElement = (el: unknown): el is FilterElement =>
-  typeof el !== "string" && !Array.isArray(el);
-
 const removeConstraint = (container: FilterContainer) => {
   return container.map(el => {
-    if (!isFilterElement(el)) return el;
+    if (!FilterElement.isCompatible(el)) return el;
 
     if (!el.constraint?.existIn(container)) {
       el.clearConstraint();
@@ -66,7 +63,7 @@ export const useContainerState = (valueProvider: FilterValueProvider) => {
     index: number,
     el: Element,
   ): el is FilterElement => {
-    return elIndex === index && isFilterElement(el);
+    return elIndex === index && FilterElement.isCompatible(el);
   };
 
   const updateFilterElement =
@@ -86,7 +83,7 @@ export const useContainerState = (valueProvider: FilterValueProvider) => {
   const updateBySlug = (slug: string, cb: StateCallback) => {
     setValue(v =>
       v.map(el => {
-        if (isFilterElement(el) && el.value.value === slug) {
+        if (FilterElement.isCompatible(el) && el.value.value === slug) {
           cb(el);
         }
 
@@ -115,7 +112,7 @@ export const useContainerState = (valueProvider: FilterValueProvider) => {
 
   const exist = (slug: string) => {
     return value.some(
-      entry => isFilterElement(entry) && entry.value.value === slug,
+      entry => FilterElement.isCompatible(entry) && entry.value.value === slug,
     );
   };
 

src/components/ConditionalFilter/useFilterContainer.ts

@@ -5,6 +5,7 @@ import { useConditionalFilterContext } from "./context";
 import { FilterElement } from "./FilterElement";
 import { ConditionValue, ItemOption } from "./FilterElement/ConditionValue";
 import { Constraint } from "./FilterElement/Constraint";
+import { hasEmptyRows } from "./FilterElement/FilterElement";
 import { LeftOperand, LeftOperandsProvider } from "./LeftOperandsProvider";
 
 export const useFilterContainer = (
@@ -85,6 +86,7 @@ export const useFilterContainer = (
 
   return {
     value,
+    hasEmptyRows: hasEmptyRows(value),
     addEmpty,
     removeAt,
     updateLeftOperator,