blog editor

src/app/_components/Form/Components/MutationProvider.tsx

@@ -1,4 +1,3 @@
-import type { UseTRPCMutationResult } from "node_modules/@trpc/react-query/dist/getQueryKey.d-CruH3ncI.mjs";
 import { createContext, useContext, type ReactNode } from "react";
 
 interface ToString {
@@ -8,7 +7,7 @@ interface ToString {
 
 
 export interface MutationInterface {
-  mutate: (params:{id:string}) => void 
+  mutate: (params: any) => void
   error: ToString | null
   status: "error" | "idle" | "pending" | "success"
 }

src/app/_components/Form/Fields/InternalLinkTextarea.tsx

@@ -0,0 +1,224 @@
+'use client'
+
+import { forwardRef, useMemo, useRef, useState, type KeyboardEvent, type TextareaHTMLAttributes } from 'react'
+
+export type InternalLinkSuggestion = {
+  label: string
+  href: string
+  group: string
+}
+
+export type MdeAutocompleteSuggestion = {
+  label: string
+  value: string
+  detail: string
+  group: string
+  trigger: string
+}
+
+export const AUTOCOMPLETE_CURSOR_MARKER = '{{cursor}}'
+
+export type AutocompleteTriggerConfig = {
+  trigger: string
+  label: string
+  isQueryValid?: (query: string) => boolean
+}
+
+type ActiveToken = {
+  start: number
+  end: number
+  query: string
+  trigger: MdeAutocompleteSuggestion['trigger']
+}
+
+const defaultTriggerConfigs: AutocompleteTriggerConfig[] = [
+  {
+    trigger: '[[',
+    label: 'Internal links',
+    isQueryValid: (query) => !query.includes(']'),
+  },
+  {
+    trigger: '<',
+    label: 'MDX components',
+    isQueryValid: (query) => !/[\s>]/.test(query),
+  },
+]
+
+function findActiveToken(
+  value: string,
+  cursor: number,
+  triggerConfigs: AutocompleteTriggerConfig[],
+): ActiveToken | null {
+  const beforeCursor = value.slice(0, cursor)
+  const activeTrigger = triggerConfigs
+    .map((config) => ({ config, start: beforeCursor.lastIndexOf(config.trigger) }))
+    .filter((candidate) => candidate.start !== -1)
+    .sort((a, b) => b.start - a.start)[0]
+
+  if (!activeTrigger) return null
+
+  const query = beforeCursor.slice(activeTrigger.start + activeTrigger.config.trigger.length)
+  if (query.includes('\n')) return null
+  if (activeTrigger.config.isQueryValid && !activeTrigger.config.isQueryValid(query)) return null
+
+  return {
+    start: activeTrigger.start,
+    end: cursor,
+    query,
+    trigger: activeTrigger.config.trigger,
+  }
+}
+
+export function linkSuggestionsToAutocomplete(suggestions: InternalLinkSuggestion[]): MdeAutocompleteSuggestion[] {
+  return suggestions.map((suggestion) => ({
+    label: suggestion.label,
+    value: `[${suggestion.label}](${suggestion.href})`,
+    detail: suggestion.href,
+    group: suggestion.group,
+    trigger: '[[',
+  }))
+}
+
+export const InternalLinkTextarea = forwardRef<HTMLTextAreaElement, TextareaHTMLAttributes<HTMLTextAreaElement> & {
+  suggestions: MdeAutocompleteSuggestion[]
+  triggerConfigs?: AutocompleteTriggerConfig[]
+}>(({ suggestions, triggerConfigs, value, onChange, onKeyDown, ...props }, ref) => {
+  const textareaRef = useRef<HTMLTextAreaElement | null>(null)
+  const [token, setToken] = useState<ActiveToken | null>(null)
+  const [selectedIndex, setSelectedIndex] = useState(0)
+
+  function setRefs(element: HTMLTextAreaElement | null) {
+    textareaRef.current = element
+    if (typeof ref === 'function') ref(element)
+    else if (ref) ref.current = element
+  }
+
+  const resolvedTriggerConfigs = useMemo(() => {
+    const configured = triggerConfigs?.length ? triggerConfigs : defaultTriggerConfigs
+    const merged = new Map(configured.map((config) => [config.trigger, config]))
+
+    for (const suggestion of suggestions) {
+      if (!merged.has(suggestion.trigger)) {
+        merged.set(suggestion.trigger, {
+          trigger: suggestion.trigger,
+          label: suggestion.trigger,
+        })
+      }
+    }
+
+    return Array.from(merged.values()).sort((a, b) => b.trigger.length - a.trigger.length)
+  }, [suggestions, triggerConfigs])
+
+  const triggerLabels = useMemo(
+    () => new Map(resolvedTriggerConfigs.map((config) => [config.trigger, config.label])),
+    [resolvedTriggerConfigs],
+  )
+
+  const matches = useMemo(() => {
+    if (!token) return []
+    const query = token.query.toLowerCase()
+    return suggestions
+      .filter((suggestion) => suggestion.trigger === token.trigger)
+      .filter((suggestion) => {
+        const haystack = `${suggestion.group} ${suggestion.label} ${suggestion.detail}`.toLowerCase()
+        return haystack.includes(query)
+      })
+      .slice(0, 8)
+  }, [suggestions, token])
+
+  function updateToken(textarea: HTMLTextAreaElement) {
+    const nextToken = findActiveToken(textarea.value, textarea.selectionStart, resolvedTriggerConfigs)
+    setToken(nextToken)
+    setSelectedIndex(0)
+  }
+
+  function insertSuggestion(textarea: HTMLTextAreaElement, suggestion: MdeAutocompleteSuggestion) {
+    if (!token) return
+
+    const markerIndex = suggestion.value.indexOf(AUTOCOMPLETE_CURSOR_MARKER)
+    const insertedValue = markerIndex === -1
+      ? suggestion.value
+      : suggestion.value.replace(AUTOCOMPLETE_CURSOR_MARKER, '')
+    const cursor = token.start + (markerIndex === -1 ? insertedValue.length : markerIndex)
+    const nextValue = `${textarea.value.slice(0, token.start)}${insertedValue}${textarea.value.slice(token.end)}`
+    const nativeInputValueSetter = Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, 'value')?.set
+    nativeInputValueSetter?.call(textarea, nextValue)
+    textarea.dispatchEvent(new Event('input', { bubbles: true }))
+    textarea.setSelectionRange(cursor, cursor)
+    setToken(null)
+    setSelectedIndex(0)
+  }
+
+  function handleKeyDown(event: KeyboardEvent<HTMLTextAreaElement>) {
+    if (token && matches.length > 0) {
+      if (event.key === 'ArrowDown') {
+        event.preventDefault()
+        setSelectedIndex((index) => (index + 1) % matches.length)
+        return
+      }
+      if (event.key === 'ArrowUp') {
+        event.preventDefault()
+        setSelectedIndex((index) => (index - 1 + matches.length) % matches.length)
+        return
+      }
+      if (event.key === 'Enter' || event.key === 'Tab') {
+        event.preventDefault()
+        const suggestion = matches[selectedIndex]
+        if (suggestion) insertSuggestion(event.currentTarget, suggestion)
+        return
+      }
+      if (event.key === 'Escape') {
+        event.preventDefault()
+        setToken(null)
+        return
+      }
+    }
+
+    onKeyDown?.(event)
+  }
+
+  return (
+    <>
+        <textarea
+        {...props}
+        ref={setRefs}
+        value={value}
+        onChange={(event) => {
+          onChange?.(event)
+          updateToken(event.currentTarget)
+        }}
+        onClick={(event) => updateToken(event.currentTarget)}
+        onKeyUp={(event) => {
+          if (['ArrowDown', 'ArrowUp', 'Enter', 'Tab', 'Escape'].includes(event.key)) return
+          updateToken(event.currentTarget)
+        }}
+        onKeyDown={handleKeyDown}
+      />
+      {token && matches.length > 0 && (
+        <div className='bg-popover text-popover-foreground absolute left-3 top-12 z-50 w-80 overflow-hidden rounded-md border shadow-md'>
+          <div className='border-b px-3 py-2 text-xs text-muted-foreground'>
+            {triggerLabels.get(token.trigger) ?? token.trigger} for {token.trigger}{token.query}
+          </div>
+          <div className='max-h-64 overflow-y-auto py-1'>
+            {matches.map((suggestion, index) => (
+              <button
+                key={`${suggestion.trigger}:${suggestion.group}:${suggestion.label}`}
+                type='button'
+                className={`flex w-full flex-col px-3 py-2 text-left text-sm ${index === selectedIndex ? 'bg-muted' : ''}`}
+                onMouseDown={(event) => {
+                  event.preventDefault()
+                  if (textareaRef.current) insertSuggestion(textareaRef.current, suggestion)
+                }}
+              >
+                <span className='font-medium'>{suggestion.label}</span>
+                <span className='text-xs text-muted-foreground'>{suggestion.group} - {suggestion.detail}</span>
+              </button>
+            ))}
+          </div>
+        </div>
+      )}
+    </>
+  )
+})
+
+InternalLinkTextarea.displayName = 'InternalLinkTextarea'

src/app/_components/Form/Fields/MdeFormField.tsx

@@ -1,25 +1,99 @@
+"use client";
+
 import MDEditor from "@uiw/react-md-editor";
+import { Maximize2, Minimize2 } from "lucide-react";
+import { useEffect, useState, type ReactElement, type TextareaHTMLAttributes } from "react";
+import { createPortal } from "react-dom";
 import type { Control, FieldValues, Path } from "react-hook-form";
 import { FormControl, FormField, FormItem, FormLabel } from "~/components/ui/form";
-export default function MdeFormField<T extends FieldValues>(params: { control: Control<T>, name: Path<T>, label: string, dataColorMode: "dark"|"light" }) {
+import { Button } from "~/components/ui/button";
+import { cn } from "~/lib/utils";
+import {
+  InternalLinkTextarea,
+  type AutocompleteTriggerConfig,
+  type MdeAutocompleteSuggestion,
+} from "./InternalLinkTextarea";
+
+export default function MdeFormField<T extends FieldValues>(params: {
+  control: Control<T>,
+  name: Path<T>,
+  label: string,
+  dataColorMode: "dark"|"light",
+  autocompleteSuggestions?: MdeAutocompleteSuggestion[],
+  triggerConfigs?: AutocompleteTriggerConfig[],
+  renderPreview?: (source: string) => ReactElement,
+}) {
+  const [fullscreen, setFullscreen] = useState(false)
+  const [mounted, setMounted] = useState(false)
+
+  useEffect(() => {
+    setMounted(true)
+  }, [])
+
+  useEffect(() => {
+    if (!fullscreen) return
+
+    const originalOverflow = document.body.style.overflow
+    document.body.style.overflow = "hidden"
+
+    return () => {
+      document.body.style.overflow = originalOverflow
+    }
+  }, [fullscreen])
+
   return (
     <FormField
       control={params.control}
       name={params.name}
-      render={({ field }) => (
-        <FormItem>
-          <FormLabel>
-            Description
-          </FormLabel>
-          <FormControl>
-            <MDEditor
-              value={field.value ? field.value : ""}
-              onChange={field.onChange}
-              data-color-mode={params.dataColorMode}
-            />
-          </FormControl>
-        </FormItem>
-      )}
+      render={({ field }) => {
+        const editor = (
+          <FormItem className={cn(fullscreen && "mde-form-field-fullscreen")}>
+            <div className="flex shrink-0 items-center justify-between gap-2">
+              <FormLabel>
+                {params.label}
+              </FormLabel>
+              <Button
+                type="button"
+                variant="outline"
+                size="icon-sm"
+                aria-label={fullscreen ? "Exit fullscreen editor" : "Open fullscreen editor"}
+                onClick={() => setFullscreen((value) => !value)}
+              >
+                {fullscreen ? <Minimize2 /> : <Maximize2 />}
+              </Button>
+            </div>
+            <FormControl className={cn(fullscreen && "min-h-0 flex-1")}>
+              <MDEditor
+                className={cn(fullscreen && "mde-form-field-editor-fullscreen min-h-0 flex-1")}
+                height={fullscreen ? "calc(100vh - 72px)" : undefined}
+                visibleDragbar={!fullscreen}
+                value={field.value ? field.value : ""}
+                onChange={field.onChange}
+                data-color-mode={params.dataColorMode}
+                commandsFilter={(command) => command.name === "fullscreen" ? false : command}
+                components={{
+                  textarea: (props) => (
+                    <InternalLinkTextarea
+                      {...(props as TextareaHTMLAttributes<HTMLTextAreaElement>)}
+                      suggestions={params.autocompleteSuggestions ?? []}
+                      triggerConfigs={params.triggerConfigs}
+                    />
+                  ),
+                  preview: params.renderPreview
+                    ? (source) => params.renderPreview?.(source) ?? <></>
+                    : undefined,
+                }}
+              />
+            </FormControl>
+          </FormItem>
+        )
+
+        if (fullscreen && mounted) {
+          return createPortal(editor, document.body)
+        }
+
+        return editor
+      }}
     />
   )
 }