feat(date-picker): add clearable option and enhance date handling

- Introduced a clearable option for the DatePicker component, allowing users to easily reset the selected date.
- Enhanced date handling logic to support conversion from Unix timestamps and improved value management for single and range selections.
- Updated TenderListFilters to utilize the clearable feature in multiple DatePicker instances for better user experience.
- Refactored useTenderListPresenter to manage date range filters more effectively, ensuring proper cleanup of cleared values.

src/components/FormElements/DatePicker/DatePicker.tsx

@@ -24,6 +24,7 @@ interface IProps<T extends FieldValues> {
   minDate?: number;
   maxDate?: number;
   timePicker?: boolean;
+  clearable?: boolean;
   rules?: Omit<
     RegisterOptions<T, Path<T>>,
     "valueAsNumber" | "valueAsDate" | "setValueAs" | "disabled"
@@ -44,6 +45,7 @@ const DatePicker = <T extends FieldValues>({
   rules,
   maxDate,
   minDate,
+  clearable = false,
 }: IProps<T>) => {
   return (
     <div className="space-y-3">
@@ -66,6 +68,50 @@ const DatePicker = <T extends FieldValues>({
           }) => {
             const error = errors[name];
 
+            const toUnixSeconds = (v: unknown): number | null => {
+              if (v === "" || v === undefined || v === null) return null;
+              const n = typeof v === "number" ? v : Number(v);
+              return Number.isFinite(n) ? n : null;
+            };
+
+            const toPickerValue = ():
+              | DateObject
+              | DateObject[]
+              | undefined => {
+              if (value === "" || value === undefined || value === null) {
+                return undefined;
+              }
+
+              if (multiple && Array.isArray(value)) {
+                const secs = value
+                  .map(toUnixSeconds)
+                  .filter((s): s is number => s !== null);
+                if (!secs.length) return undefined;
+                return secs.map((unix) => new DateObject(new Date(unix * 1000)));
+              }
+
+              if (range && Array.isArray(value)) {
+                const secs = value
+                  .map(toUnixSeconds)
+                  .filter((s): s is number => s !== null);
+                if (!secs.length) return undefined;
+                return secs.map((unix) => new DateObject(new Date(unix * 1000)));
+              }
+
+              if (range && !Array.isArray(value)) {
+                return undefined;
+              }
+
+              const unix = toUnixSeconds(value);
+              if (unix === null) return undefined;
+              return new DateObject(new Date(unix * 1000));
+            };
+
+            const pickerValue = toPickerValue();
+            const hasValue =
+              pickerValue !== undefined &&
+              (Array.isArray(pickerValue) ? pickerValue.length > 0 : true);
+
             return (
               <>
                 <div className="relative">
@@ -81,9 +127,11 @@ const DatePicker = <T extends FieldValues>({
                     }
                     onlyYearPicker={onlyYearPicker}
                     multiple={multiple}
+                    value={pickerValue}
                     onChange={(date: DateObject | DateObject[] | null) => {
                       if (!date) {
-                        return onChange("");
+                        onChange("");
+                        return;
                       }
 
                       if (Array.isArray(date)) {
@@ -97,6 +145,7 @@ const DatePicker = <T extends FieldValues>({
                     containerClassName="w-full"
                     inputClass={cn(
                       "w-full rounded-xl border border-stroke/70 bg-white/90 px-5.5 py-3 pl-12.5 text-dark shadow-[0_1px_2px_rgba(16,24,40,0.04),0_8px_20px_rgba(16,24,40,0.04)] outline-none backdrop-blur-[1px] transition-all duration-200 focus:border-primary/70 focus:bg-white focus:shadow-[0_0_0_2px_rgba(59,130,246,0.14),0_10px_24px_rgba(59,130,246,0.08)] disabled:cursor-default disabled:bg-gray-2/70 dark:border-dark-3/80 dark:bg-dark-2/85 dark:text-white dark:focus:border-primary/80 dark:focus:shadow-[0_0_0_2px_rgba(59,130,246,0.2),0_10px_24px_rgba(15,23,42,0.45)] dark:disabled:bg-dark",
+                      clearable && hasValue && "pr-11",
                       error &&
                         "border-red/80 focus:border-red focus:shadow-[0_0_0_2px_rgba(239,68,68,0.16),0_10px_24px_rgba(239,68,68,0.1)] dark:border-red/80 dark:focus:shadow-[0_0_0_2px_rgba(239,68,68,0.24),0_10px_24px_rgba(127,29,29,0.45)]",
                     )}
@@ -105,6 +154,35 @@ const DatePicker = <T extends FieldValues>({
                   <span className="pointer-events-none absolute left-4.5 top-1/2 -translate-y-1/2 text-dark-5 transition-colors dark:text-dark-6">
                     <CalendarIcon />
                   </span>
+                  {clearable && hasValue && (
+                    <button
+                      type="button"
+                      aria-label="Clear date"
+                      className="absolute right-3 top-1/2 z-10 -translate-y-1/2 rounded-md p-1 text-dark-5 transition hover:bg-gray-2 hover:text-dark dark:text-dark-6 dark:hover:bg-dark-3 dark:hover:text-white"
+                      onClick={(e) => {
+                        e.preventDefault();
+                        e.stopPropagation();
+                        onChange("");
+                      }}
+                    >
+                      <svg
+                        width="16"
+                        height="16"
+                        viewBox="0 0 16 16"
+                        fill="none"
+                        xmlns="http://www.w3.org/2000/svg"
+                        aria-hidden
+                      >
+                        <path
+                          d="M12 4L4 12M4 4L12 12"
+                          stroke="currentColor"
+                          strokeWidth="2"
+                          strokeLinecap="round"
+                          strokeLinejoin="round"
+                        />
+                      </svg>
+                    </button>
+                  )}
                 </div>
 
                 {error && (

src/components/Tables/tenders/TenderListFilters.tsx

@@ -1,11 +1,6 @@
 import DatePicker from "@/components/FormElements/DatePicker/DatePicker";
 import InputGroup from "@/components/FormElements/InputGroup";
-import { Select } from "@/components/FormElements/select";
 import { Button } from "@/components/ui-elements/button";
-import { Countries } from "@/constants/countries";
-import { TenderStatus } from "@/constants/enums";
-import { Languages } from "@/constants/languages";
-import { getEnumAsArray } from "@/utils/shared";
 import {
   Control,
   FieldValues,
@@ -59,30 +54,14 @@ const TenderListFilters = ({
         label="description"
         type="text"
       />
-      <Select
+
-        {...filterRegister("status")}
-        items={getEnumAsArray(TenderStatus)}
-        label="status"
-        name="status"
-        clearable
-        value={watch("status")}
-        onClear={() => setValue("status", undefined)}
-      />
       <InputGroup
         {...filterRegister("country")}
         name="country"
         label="country"
         type="text"
       />
-      <Select
+
-        {...filterRegister("country_code")}
-        items={Countries}
-        label="country code"
-        name="country_code"
-        clearable
-        value={watch("country_code")}
-        onClear={() => setValue("country_code", undefined)}
-      />
       <InputGroup
         {...filterRegister("country_codes")}
         name="country_codes"
@@ -131,6 +110,7 @@ const TenderListFilters = ({
         label="created at range"
         range
         timePicker
+        clearable
       />
       <DatePicker
         control={control}
@@ -138,6 +118,7 @@ const TenderListFilters = ({
         label="tender deadline range"
         range
         timePicker
+        clearable
       />
       <DatePicker
         control={control}
@@ -145,6 +126,7 @@ const TenderListFilters = ({
         label="publication date range"
         range
         timePicker
+        clearable
       />
       <DatePicker
         control={control}
@@ -152,15 +134,7 @@ const TenderListFilters = ({
         label="submission deadline range"
         range
         timePicker
-      />
-      <Select
-        {...filterRegister("lang")}
-        items={Languages}
-        label="language"
-        name="lang"
         clearable
-        value={watch("lang")}
-        onClear={() => setValue("lang", undefined)}
       />
 
       <div className="col-span-2 flex gap-4">

src/components/Tables/tenders/useTenderListPresenter.ts

@@ -50,6 +50,56 @@ const normalizeFilterValues = (values: Record<string, any>) => {
   return normalized;
 };
 
+const parseUnixParam = (v: unknown): number | undefined => {
+  if (v === undefined || v === null || v === "") return undefined;
+  const n = typeof v === "number" ? v : Number(v);
+  return Number.isFinite(n) ? n : undefined;
+};
+
+const buildRangeFormValue = (
+  params: Record<string, any>,
+  fromKey: string,
+  toKey: string,
+  legacy?: { from: string; to: string },
+): number[] | undefined => {
+  let from = parseUnixParam(params[fromKey]);
+  let to = parseUnixParam(params[toKey]);
+  if (legacy) {
+    if (from === undefined) from = parseUnixParam(params[legacy.from]);
+    if (to === undefined) to = parseUnixParam(params[legacy.to]);
+  }
+  if (from !== undefined && to !== undefined) return [from, to];
+  if (from !== undefined) return [from];
+  if (to !== undefined) return [to];
+  return undefined;
+};
+
+const buildTenderFilterFormValues = (params: Record<string, any>) => ({
+  ...params,
+  created_at_range: buildRangeFormValue(
+    params,
+    "created_at_from",
+    "created_at_to",
+  ),
+  tender_deadline_range: buildRangeFormValue(
+    params,
+    "tender_deadline_from",
+    "tender_deadline_to",
+    { from: "deadline_from", to: "deadline_to" },
+  ),
+  publication_date_range: buildRangeFormValue(
+    params,
+    "publication_date_from",
+    "publication_date_to",
+  ),
+  submission_deadline_range: buildRangeFormValue(
+    params,
+    "submission_deadline_from",
+    "submission_deadline_to",
+    { from: "submission_date_from", to: "submission_date_to" },
+  ),
+});
+
 const mapDateRangeFilters = (values: Record<string, any>) => {
   const mappedValues = { ...values };
 
@@ -65,6 +115,22 @@ const mapDateRangeFilters = (values: Record<string, any>) => {
     aliases?: Array<{ from: string; to: string }>;
   }) => {
     const rangeValue = mappedValues[key];
+    const isCleared =
+      rangeValue === "" ||
+      rangeValue === null ||
+      (Array.isArray(rangeValue) && rangeValue.length === 0);
+
+    if (isCleared) {
+      delete mappedValues[key];
+      delete mappedValues[fromKey];
+      delete mappedValues[toKey];
+      aliases.forEach((alias) => {
+        delete mappedValues[alias.from];
+        delete mappedValues[alias.to];
+      });
+      return;
+    }
+
     if (!Array.isArray(rangeValue)) {
       return;
     }
@@ -112,6 +178,42 @@ const mapDateRangeFilters = (values: Record<string, any>) => {
 
   return mappedValues;
 };
+
+const TENDER_RANGE_PARAM_KEYS = [
+  "created_at_from",
+  "created_at_to",
+  "tender_deadline_from",
+  "tender_deadline_to",
+  "deadline_from",
+  "deadline_to",
+  "publication_date_from",
+  "publication_date_to",
+  "submission_deadline_from",
+  "submission_deadline_to",
+  "submission_date_from",
+  "submission_date_to",
+  "created_at_range",
+  "tender_deadline_range",
+  "publication_date_range",
+  "submission_deadline_range",
+] as const;
+
+/** Query keys owned by TenderListFilters — drop from URL when cleared (not in normalized submit). */
+const TENDER_FILTER_MODAL_KEYS = new Set<string>([
+  "q",
+  "title",
+  "description",
+  "country",
+  "country_codes",
+  "notice_type",
+  "notice_types",
+  "form_types",
+  "main_classification",
+  "classifications",
+  "cpv_codes",
+  ...TENDER_RANGE_PARAM_KEYS,
+]);
+
 const useTenderListPresenter = () => {
   const [isModalOpen, setIsModalOpen] = useState(false);
   const [isFilterModalOpen, setIsFilterModalOpen] = useState(false);
@@ -139,13 +241,12 @@ const useTenderListPresenter = () => {
       ...apiDefaultParams,
       offset: 0,
       limit: 10,
-      lang: "en",
     };
     for (const [key, value] of searchParams.entries()) {
       newParams[key] = value;
     }
     setParams(newParams);
-    filterFormReset(newParams);
+    filterFormReset(buildTenderFilterFormValues(newParams));
   }, [searchParams, filterFormReset]);
 
   const { data, error, isPending } = useTendersQuery(params);
@@ -155,7 +256,13 @@ const useTenderListPresenter = () => {
   const search = (data: any) => {
     const mappedDateRanges = mapDateRangeFilters(data);
     const normalizedData = normalizeFilterValues(mappedDateRanges);
-    const newParams = { ...params, ...normalizedData, offset: 0 };
+    const merged: Record<string, any> = { ...params };
+    for (const key of TENDER_FILTER_MODAL_KEYS) {
+      if (!(key in normalizedData)) {
+        delete merged[key];
+      }
+    }
+    const newParams = { ...merged, ...normalizedData, offset: 0 };
     const cleanedParams = deleteEmptyKeys(newParams);
     const queryString = new URLSearchParams(cleanedParams).toString();
     router.push(`${pathName}?${queryString}`);