chore: limit total custom strategies displayed (#10688)

https://linear.app/unleash/issue/2-3897/limit-custom-strategies-like-were-doing-with-release-templates

Limits total custom strategies displayed, like we're doing for release
templates, in the new "add strategy" modal.

Added a more generic logic to `FeatureStrategyMenuCardsSection.tsx` so
we can reuse it for both.

We can also do it for other sections in the modal, but that feels like a
premature optimization. These 2 categories are the ones that are user
owned, and can have many items.

frontend/src/component/feature/FeatureStrategy/FeatureStrategyMenu/FeatureStrategyMenuCards/FeatureStrategyMenuCards.tsx

@@ -38,6 +38,8 @@ const FILTERS = [
 
 export type StrategyFilterValue = (typeof FILTERS)[number]['value'];
 
+const CUSTOM_STRATEGY_DISPLAY_LIMIT = 5;
+
 const StyledContainer = styled(Box)(() => ({
     width: '100%',
     display: 'flex',
@@ -118,6 +120,9 @@ export const FeatureStrategyMenuCards = ({
         (strategy) => strategy.editable,
     );
 
+    const customStrategyDisplayLimit =
+        filter === 'custom' ? 0 : CUSTOM_STRATEGY_DISPLAY_LIMIT;
+
     const availableFilters = useMemo(
         () =>
             FILTERS.filter(({ value }) => {
@@ -281,7 +286,11 @@ export const FeatureStrategyMenuCards = ({
                     </FeatureStrategyMenuCardsSection>
                 )}
                 {shouldRender('custom') && customStrategies.length > 0 && (
-                    <FeatureStrategyMenuCardsSection title='Custom strategies'>
+                    <FeatureStrategyMenuCardsSection
+                        title='Custom strategies'
+                        limit={customStrategyDisplayLimit}
+                        viewMore={() => setFilter('custom')}
+                    >
                         {customStrategies.map(renderStrategy)}
                     </FeatureStrategyMenuCardsSection>
                 )}

frontend/src/component/feature/FeatureStrategy/FeatureStrategyMenu/FeatureStrategyMenuCards/FeatureStrategyMenuCardsReleaseTemplates.tsx

@@ -2,7 +2,7 @@ import { useReleasePlanTemplates } from 'hooks/api/getters/useReleasePlanTemplat
 import useUiConfig from 'hooks/api/getters/useUiConfig/useUiConfig';
 import { ReactComponent as ReleaseTemplateIcon } from 'assets/img/releaseTemplates.svg';
 import type { IReleasePlanTemplate } from 'interfaces/releasePlans.ts';
-import { Box, Button, styled } from '@mui/material';
+import { Box, styled } from '@mui/material';
 import type { StrategyFilterValue } from './FeatureStrategyMenuCards.tsx';
 import type { Dispatch, SetStateAction } from 'react';
 import { Link as RouterLink } from 'react-router-dom';
@@ -74,16 +74,6 @@ const StyledNoTemplatesDescription = styled('p')(({ theme }) => ({
     color: theme.palette.text.secondary,
 }));
 
-const StyledViewMoreButton = styled(Button)(({ theme }) => ({
-    display: 'flex',
-    alignItems: 'center',
-    justifyContent: 'center',
-    height: theme.spacing(10),
-    padding: theme.spacing(2),
-    border: `1px solid ${theme.palette.divider}`,
-    borderRadius: theme.spacing(1),
-}));
-
 const StyledLink = styled(RouterLink)({
     textDecoration: 'none',
     '&:hover': {
@@ -113,10 +103,9 @@ export const FeatureStrategyMenuCardsReleaseTemplates = ({
 
     const isFiltered = filter === 'releaseTemplates';
     const shouldShowHeader = !isFiltered || templates.length > 0;
-
-    const slicedTemplates = isFiltered
-        ? templates
-        : templates.slice(0, RELEASE_TEMPLATE_DISPLAY_LIMIT);
+    const releaseTemplatesDisplayLimit = isFiltered
+        ? 0
+        : RELEASE_TEMPLATE_DISPLAY_LIMIT;
 
     return (
         <Box>
@@ -153,8 +142,12 @@ export const FeatureStrategyMenuCardsReleaseTemplates = ({
                     </StyledNoTemplatesBody>
                 </StyledNoTemplatesContainer>
             ) : (
-                <FeatureStrategyMenuCardsSection>
-                    {slicedTemplates.map((template) => (
+                <FeatureStrategyMenuCardsSection
+                    limit={releaseTemplatesDisplayLimit}
+                    viewMore={() => setFilter('releaseTemplates')}
+                    viewMoreLabel='View more templates'
+                >
+                    {templates.map((template) => (
                         <FeatureStrategyMenuCard
                             key={template.id}
                             name={template.name}
@@ -175,16 +168,6 @@ export const FeatureStrategyMenuCardsReleaseTemplates = ({
                             </FeatureStrategyMenuCardAction>
                         </FeatureStrategyMenuCard>
                     ))}
-                    {slicedTemplates.length < templates.length &&
-                        templates.length > RELEASE_TEMPLATE_DISPLAY_LIMIT && (
-                            <StyledViewMoreButton
-                                variant='text'
-                                size='small'
-                                onClick={() => setFilter('releaseTemplates')}
-                            >
-                                View more templates
-                            </StyledViewMoreButton>
-                        )}
                 </FeatureStrategyMenuCardsSection>
             )}
         </Box>

frontend/src/component/feature/FeatureStrategy/FeatureStrategyMenu/FeatureStrategyMenuCards/FeatureStrategyMenuCardsSection.tsx

@@ -1,4 +1,4 @@
-import { Box, styled } from '@mui/material';
+import { Box, Button, styled } from '@mui/material';
 import type { ReactNode } from 'react';
 
 export const StyledStrategyModalSectionHeader = styled(Box)(({ theme }) => ({
@@ -17,23 +17,52 @@ const StyledStrategyModalSectionGrid = styled(Box)(({ theme }) => ({
     width: '100%',
 }));
 
+const StyledViewMoreButton = styled(Button)(({ theme }) => ({
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    height: theme.spacing(10),
+    padding: theme.spacing(2),
+    border: `1px solid ${theme.palette.divider}`,
+    borderRadius: theme.spacing(1),
+}));
+
 interface IFeatureStrategyMenuCardsSectionProps {
     title?: string;
-    children: ReactNode;
+    limit?: number;
+    viewMore?: () => void;
+    viewMoreLabel?: string;
+    children: ReactNode[];
 }
 
 export const FeatureStrategyMenuCardsSection = ({
     title,
+    limit,
+    viewMore,
+    viewMoreLabel = 'View more',
     children,
-}: IFeatureStrategyMenuCardsSectionProps) => (
-    <Box>
-        {title && (
-            <StyledStrategyModalSectionHeader>
-                {title}
-            </StyledStrategyModalSectionHeader>
-        )}
-        <StyledStrategyModalSectionGrid>
-            {children}
-        </StyledStrategyModalSectionGrid>
-    </Box>
-);
+}: IFeatureStrategyMenuCardsSectionProps) => {
+    const limitedChildren = limit ? children.slice(0, limit) : children;
+
+    return (
+        <Box>
+            {title && (
+                <StyledStrategyModalSectionHeader>
+                    {title}
+                </StyledStrategyModalSectionHeader>
+            )}
+            <StyledStrategyModalSectionGrid>
+                {limitedChildren}
+                {viewMore && limitedChildren.length < children.length && (
+                    <StyledViewMoreButton
+                        variant='text'
+                        size='small'
+                        onClick={viewMore}
+                    >
+                        {viewMoreLabel}
+                    </StyledViewMoreButton>
+                )}
+            </StyledStrategyModalSectionGrid>
+        </Box>
+    );
+};