feat(contentful-apps): Hotfix - Allow two project subpages to have same slug (#16412)

apps/contentful-apps/pages/fields/project-subpage-slug-field.tsx

@@ -0,0 +1,149 @@
+import { useEffect, useRef, useState } from 'react'
+import { useDebounce } from 'react-use'
+import type { EntryProps } from 'contentful-management'
+import { FieldExtensionSDK } from '@contentful/app-sdk'
+import { Stack, Text, TextInput } from '@contentful/f36-components'
+import { useCMA, useSDK } from '@contentful/react-apps-toolkit'
+import slugify from '@sindresorhus/slugify'
+
+const DEBOUNCE_TIME = 100
+
+const ProjectSubpageSlugField = () => {
+  const sdk = useSDK<FieldExtensionSDK>()
+  const cma = useCMA()
+  const [value, setValue] = useState(sdk.field?.getValue() ?? '')
+  const [isValid, setIsValid] = useState(true)
+  const [projectPage, setProjectPage] = useState<EntryProps | null>(null)
+  const initialTitleChange = useRef(true)
+  const [hasEntryBeenPublished, setHasEntryBeenPublished] = useState(
+    Boolean(sdk.entry.getSys()?.firstPublishedAt),
+  )
+
+  const defaultLocale = sdk.locales.default
+
+  useEffect(() => {
+    const fetchProjectPage = async () => {
+      const response = await cma.entry.getMany({
+        query: {
+          links_to_entry: sdk.entry.getSys().id,
+          content_type: 'projectPage',
+          'sys.archivedVersion[exists]': false,
+          limit: 1,
+        },
+      })
+      if (response.items.length > 0) {
+        setProjectPage(response.items[0])
+      }
+    }
+    fetchProjectPage()
+  }, [cma.entry, sdk.entry])
+
+  useEffect(() => {
+    sdk.entry.onSysChanged((newSys) => {
+      setHasEntryBeenPublished(Boolean(newSys?.firstPublishedAt))
+    })
+  }, [sdk.entry])
+
+  // Update slug field if the title field changes
+  useEffect(() => {
+    return sdk.entry.fields.title
+      .getForLocale(sdk.field.locale)
+      .onValueChanged((newTitle) => {
+        if (hasEntryBeenPublished) {
+          return
+        }
+
+        // Callback gets called on initial render, so we  want to ignore that
+        if (initialTitleChange.current) {
+          initialTitleChange.current = false
+          return
+        }
+
+        if (newTitle) {
+          setValue(slugify(String(newTitle)))
+        }
+      })
+  }, [hasEntryBeenPublished, sdk.entry.fields.title, sdk.field.locale])
+
+  useEffect(() => {
+    sdk.window.startAutoResizer()
+  }, [sdk.window])
+
+  // Validate the user input
+  useDebounce(
+    async () => {
+      if (!projectPage) {
+        setIsValid(true)
+        return
+      }
+
+      const subpageIds: string[] =
+        projectPage?.fields?.projectSubpages?.[defaultLocale]?.map(
+          (subpage) => subpage.sys.id,
+        ) ?? []
+
+      const subpagesWithSameSlug = (
+        await cma.entry.getMany({
+          query: {
+            locale: sdk.field.locale,
+            content_type: 'projectSubpage',
+            'fields.slug': value,
+            'sys.id[ne]': sdk.entry.getSys().id,
+            'sys.archivedVersion[exists]': false,
+            limit: 1000,
+            select: 'sys',
+          },
+        })
+      ).items
+
+      const subpageExistsWithSameSlug = subpagesWithSameSlug.some((subpage) =>
+        subpageIds.includes(subpage.sys.id),
+      )
+
+      if (subpageExistsWithSameSlug) {
+        setIsValid(false)
+        return
+      }
+      setIsValid(true)
+    },
+    DEBOUNCE_TIME,
+    [value, projectPage],
+  )
+
+  useDebounce(
+    () => {
+      if (isValid) {
+        sdk.field.setValue(value)
+      } else {
+        sdk.field.setValue(null) // Set to null to prevent entry publish
+      }
+      sdk.field.setInvalid(!isValid)
+    },
+    DEBOUNCE_TIME,
+    [isValid, value],
+  )
+
+  const isInvalid = value.length === 0 || !isValid
+
+  return (
+    <Stack spacing="spacingXs" flexDirection="column" alignItems="flex-start">
+      <TextInput
+        value={value}
+        onChange={(ev) => {
+          setValue(ev.target.value)
+        }}
+        isInvalid={isInvalid}
+      />
+      {value.length === 0 && sdk.field.locale === defaultLocale && (
+        <Text fontColor="red400">Invalid slug</Text>
+      )}
+      {value.length > 0 && isInvalid && (
+        <Text fontColor="red400">
+          Project subpage already exists with this slug
+        </Text>
+      )}
+    </Stack>
+  )
+}
+
+export default ProjectSubpageSlugField