feat: Added export support in feast UI

ui/src/components/ExportButton.tsx

@@ -0,0 +1,74 @@
+import React, { useState } from "react";
+import {
+  EuiButton,
+  EuiPopover,
+  EuiContextMenuPanel,
+  EuiContextMenuItem,
+} from "@elastic/eui";
+
+interface ExportButtonProps {
+  data: any[];
+  fileName: string;
+  formats?: ("json" | "csv")[];
+}
+
+const ExportButton: React.FC<ExportButtonProps> = ({
+  data,
+  fileName,
+  formats = ["json", "csv"],
+}) => {
+  const [isPopoverOpen, setIsPopoverOpen] = useState(false);
+
+  const exportData = (format: "json" | "csv") => {
+    let content = "";
+    let mimeType = "";
+
+    if (format === "json") {
+      content = JSON.stringify(data, null, 2);
+      mimeType = "application/json";
+    } else {
+      const headers = Object.keys(data[0] || {}).join(",") + "\n";
+      const rows = data.map((item) => Object.values(item).join(",")).join("\n");
+      content = headers + rows;
+      mimeType = "text/csv";
+    }
+
+    const blob = new Blob([content], { type: mimeType });
+    const link = document.createElement("a");
+    link.href = URL.createObjectURL(blob);
+    link.download = `${fileName}.${format}`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+  };
+
+  const exportMenu = (
+    <EuiContextMenuPanel
+      items={formats.map((format) => (
+        <EuiContextMenuItem key={format} onClick={() => exportData(format)}>
+          Export {format.toUpperCase()}
+        </EuiContextMenuItem>
+      ))}
+    />
+  );
+
+  return (
+    <EuiPopover
+      button={
+        <EuiButton
+          color="primary"
+          fill
+          onClick={() => setIsPopoverOpen(!isPopoverOpen)}
+        >
+          Export
+        </EuiButton>
+      }
+      isOpen={isPopoverOpen}
+      closePopover={() => setIsPopoverOpen(false)}
+      panelPaddingSize="s"
+    >
+      {exportMenu}
+    </EuiPopover>
+  );
+};
+export default ExportButton;

ui/src/pages/data-sources/Index.tsx

@@ -18,6 +18,7 @@ import DataSourceIndexEmptyState from "./DataSourceIndexEmptyState";
 import { DataSourceIcon } from "../../graphics/DataSourceIcon";
 import { useSearchQuery } from "../../hooks/useSearchInputWithTags";
 import { feast } from "../../protos";
+import ExportButton from "../../components/ExportButton";
 
 const useLoadDatasources = () => {
   const registryUrl = useContext(RegistryPathContext);
@@ -65,6 +66,13 @@ const Index = () => {
         restrictWidth
         iconType={DataSourceIcon}
         pageTitle="Data Sources"
+        rightSideItems={[
+          <ExportButton
+            data={filterResult ?? []}
+            fileName="data_sources"
+            formats={["json"]}
+          />,
+        ]}
       />
       <EuiPageTemplate.Section>
         {isLoading && (

ui/src/pages/entities/Index.tsx

@@ -9,6 +9,7 @@ import EntitiesListingTable from "./EntitiesListingTable";
 import { useDocumentTitle } from "../../hooks/useDocumentTitle";
 import RegistryPathContext from "../../contexts/RegistryPathContext";
 import EntityIndexEmptyState from "./EntityIndexEmptyState";
+import ExportButton from "../../components/ExportButton";
 
 const useLoadEntities = () => {
   const registryUrl = useContext(RegistryPathContext);
@@ -36,6 +37,13 @@ const Index = () => {
         restrictWidth
         iconType={EntityIcon}
         pageTitle="Entities"
+        rightSideItems={[
+          <ExportButton
+            data={data ?? []}
+            fileName="entities"
+            formats={["json"]}
+          />,
+        ]}
       />
       <EuiPageTemplate.Section>
         {isLoading && (

ui/src/pages/feature-services/Index.tsx

@@ -24,6 +24,7 @@ import { useDocumentTitle } from "../../hooks/useDocumentTitle";
 import RegistryPathContext from "../../contexts/RegistryPathContext";
 import FeatureServiceIndexEmptyState from "./FeatureServiceIndexEmptyState";
 import TagSearch from "../../components/TagSearch";
+import ExportButton from "../../components/ExportButton";
 import { useFeatureServiceTagsAggregation } from "../../hooks/useTagsAggregation";
 import { feast } from "../../protos";
 
@@ -115,6 +116,13 @@ const Index = () => {
         restrictWidth
         iconType={FeatureServiceIcon}
         pageTitle="Feature Services"
+        rightSideItems={[
+          <ExportButton
+            data={filterResult ?? []}
+            fileName="feature_services"
+            formats={["json"]}
+          />,
+        ]}
       />
       <EuiPageTemplate.Section>
         {isLoading && (

ui/src/pages/feature-views/Index.tsx

@@ -25,6 +25,7 @@ import RegistryPathContext from "../../contexts/RegistryPathContext";
 import FeatureViewIndexEmptyState from "./FeatureViewIndexEmptyState";
 import { useFeatureViewTagsAggregation } from "../../hooks/useTagsAggregation";
 import TagSearch from "../../components/TagSearch";
+import ExportButton from "../../components/ExportButton";
 
 const useLoadFeatureViews = () => {
   const registryUrl = useContext(RegistryPathContext);
@@ -117,6 +118,13 @@ const Index = () => {
         restrictWidth
         iconType={FeatureViewIcon}
         pageTitle="Feature Views"
+        rightSideItems={[
+          <ExportButton
+            data={filterResult ?? []}
+            fileName="feature_views"
+            formats={["json"]}
+          />,
+        ]}
       />
       <EuiPageTemplate.Section>
         {isLoading && (

ui/src/pages/features/FeatureListPage.tsx

@@ -9,6 +9,7 @@ import {
   Pagination,
 } from "@elastic/eui";
 import EuiCustomLink from "../../components/EuiCustomLink";
+import ExportButton from "../../components/ExportButton";
 import { useParams } from "react-router-dom";
 import useLoadRegistry from "../../queries/useLoadRegistry";
 import RegistryPathContext from "../../contexts/RegistryPathContext";
@@ -109,6 +110,9 @@ const FeatureListPage = () => {
         restrictWidth
         iconType={FeatureIcon}
         pageTitle="Feature List"
+        rightSideItems={[
+          <ExportButton data={filteredFeatures} fileName="features" />,
+        ]}
       />
       <EuiPageTemplate.Section>
         {isLoading ? (